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Merge pull request #11454 from hashicorp/f-goodbye-legacy 

core: remove legacy graph
This commit is contained in:
Mitchell Hashimoto 2017-01-27 11:08:32 -08:00 committed by GitHub
parent 0cd69d2101 2beb62c92b
commit d224d872b9
53 changed files with 283 additions and 6220 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
command/graph.go
View File

@ -158,7 +158,8 @@ Options:
-no-color If specified, output won't contain any color.
-type=plan Type of graph to output. Can be: plan, plan-destroy, apply,
legacy.
validate, input, refresh.
`
return strings.TrimSpace(helpText)

4
helper/experiment/experiment.go
View File

@ -50,9 +50,6 @@ import (
// of definition and use. This allows the compiler to enforce references
// so it becomes easy to remove the features.
var (
// Reuse the old graphs from TF 0.7.x. These will be removed at some point.
X_legacyGraph = newBasicID("legacy-graph", "LEGACY_GRAPH", false)
// Shadow graph. This is already on by default. Disabling it will be
// allowed for awhile in order for it to not block operations.
X_shadow = newBasicID("shadow", "SHADOW", true)
@ -75,7 +72,6 @@ var (
func init() {
// The list of all experiments, update this when an experiment is added.
All = []ID{
X_legacyGraph,
X_shadow,
x_force,
}

68
terraform/context.go
View File

@ -262,30 +262,11 @@ func (c *Context) Graph(typ GraphType, opts *ContextGraphOpts) (*Graph, error) {
Targets: c.targets,
Validate: opts.Validate,
}).Build(RootModulePath)
case GraphTypeLegacy:
return c.graphBuilder(opts).Build(RootModulePath)
}
return nil, fmt.Errorf("unknown graph type: %s", typ)
}
// GraphBuilder returns the GraphBuilder that will be used to create
// the graphs for this context.
func (c *Context) graphBuilder(g *ContextGraphOpts) GraphBuilder {
return &BuiltinGraphBuilder{
Root: c.module,
Diff: c.diff,
Providers: c.components.ResourceProviders(),
Provisioners: c.components.ResourceProvisioners(),
State: c.state,
Targets: c.targets,
Destroy: c.destroy,
Validate: g.Validate,
Verbose: g.Verbose,
}
}
// ShadowError returns any errors caught during a shadow operation.
//
// A shadow operation is an operation run in parallel to a real operation
@ -465,15 +446,8 @@ func (c *Context) Apply() (*State, error) {
// Copy our own state
c.state = c.state.DeepCopy()
// Enable the new graph by default
X_legacyGraph := experiment.Enabled(experiment.X_legacyGraph)
// Build the graph.
graphType := GraphTypeLegacy
if !X_legacyGraph {
graphType = GraphTypeApply
}
graph, err := c.Graph(graphType, nil)
graph, err := c.Graph(GraphTypeApply, nil)
if err != nil {
return nil, err
}
@ -541,17 +515,10 @@ func (c *Context) Plan() (*Plan, error) {
c.diff.init()
c.diffLock.Unlock()
// Used throughout below
X_legacyGraph := experiment.Enabled(experiment.X_legacyGraph)
// Build the graph.
graphType := GraphTypeLegacy
if !X_legacyGraph {
if c.destroy {
graphType = GraphTypePlanDestroy
} else {
graphType = GraphTypePlan
}
graphType := GraphTypePlan
if c.destroy {
graphType = GraphTypePlanDestroy
}
graph, err := c.Graph(graphType, nil)
if err != nil {
@ -576,15 +543,17 @@ func (c *Context) Plan() (*Plan, error) {
p.Diff.DeepCopy()
}
// We don't do the reverification during the new destroy plan because
// it will use a different apply process.
if X_legacyGraph {
// Now that we have a diff, we can build the exact graph that Apply will use
// and catch any possible cycles during the Plan phase.
if _, err := c.Graph(GraphTypeLegacy, nil); err != nil {
return nil, err
/*
// We don't do the reverification during the new destroy plan because
// it will use a different apply process.
if X_legacyGraph {
// Now that we have a diff, we can build the exact graph that Apply will use
// and catch any possible cycles during the Plan phase.
if _, err := c.Graph(GraphTypeLegacy, nil); err != nil {
return nil, err
}
}
}
*/
var errs error
if len(walker.ValidationErrors) > 0 {
@ -606,15 +575,8 @@ func (c *Context) Refresh() (*State, error) {
// Copy our own state
c.state = c.state.DeepCopy()
// Used throughout below
X_legacyGraph := experiment.Enabled(experiment.X_legacyGraph)
// Build the graph.
graphType := GraphTypeLegacy
if !X_legacyGraph {
graphType = GraphTypeRefresh
}
graph, err := c.Graph(graphType, nil)
graph, err := c.Graph(GraphTypeRefresh, nil)
if err != nil {
return nil, err
}

2
terraform/context_apply_test.go
View File

@ -7229,7 +7229,7 @@ template_file.child:
type = template_file
Dependencies:
template_file.parent
template_file.parent.*
template_file.parent:
ID = foo
template = Hi

66
terraform/graph.go
View File

@ -29,11 +29,6 @@ type Graph struct {
// RootModuleName
Path []string
// annotations are the annotations that are added to vertices. Annotations
// are arbitrary metadata taht is used for various logic. Annotations
// should have unique keys that are referenced via constants.
annotations map[dag.Vertex]map[string]interface{}
// dependableMap is a lookaside table for fast lookups for connecting
// dependencies by their GraphNodeDependable value to avoid O(n^3)-like
// situations and turn them into O(1) with respect to the number of new
@ -52,29 +47,6 @@ func (g *Graph) DirectedGraph() dag.Grapher {
return &g.AcyclicGraph
}
// Annotations returns the annotations that are configured for the
// given vertex. The map is guaranteed to be non-nil but may be empty.
//
// The returned map may be modified to modify the annotations of the
// vertex.
func (g *Graph) Annotations(v dag.Vertex) map[string]interface{} {
g.once.Do(g.init)
// If this vertex isn't in the graph, then just return an empty map
if !g.HasVertex(v) {
return map[string]interface{}{}
}
// Get the map, if it doesn't exist yet then initialize it
m, ok := g.annotations[v]
if !ok {
m = make(map[string]interface{})
g.annotations[v] = m
}
return m
}
// Add is the same as dag.Graph.Add.
func (g *Graph) Add(v dag.Vertex) dag.Vertex {
g.once.Do(g.init)
@ -89,14 +61,6 @@ func (g *Graph) Add(v dag.Vertex) dag.Vertex {
}
}
// If this initializes annotations, then do that
if av, ok := v.(GraphNodeAnnotationInit); ok {
as := g.Annotations(v)
for k, v := range av.AnnotationInit() {
as[k] = v
}
}
return v
}
@ -111,9 +75,6 @@ func (g *Graph) Remove(v dag.Vertex) dag.Vertex {
}
}
// Remove the annotations
delete(g.annotations, v)
// Call upwards to remove it from the actual graph
return g.Graph.Remove(v)
}
@ -133,12 +94,6 @@ func (g *Graph) Replace(o, n dag.Vertex) bool {
}
}
// Move the annotation if it exists
if m, ok := g.annotations[o]; ok {
g.annotations[n] = m
delete(g.annotations, o)
}
return g.Graph.Replace(o, n)
}
@ -195,13 +150,6 @@ func (g *Graph) ConnectTo(v dag.Vertex, targets []string) []string {
return missing
}
// Dependable finds the vertices in the graph that have the given dependable
// names and returns them.
func (g *Graph) Dependable(n string) dag.Vertex {
// TODO: do we need this?
return nil
}
// Walk walks the graph with the given walker for callbacks. The graph
// will be walked with full parallelism, so the walker should expect
// to be called in concurrently.
@ -210,10 +158,6 @@ func (g *Graph) Walk(walker GraphWalker) error {
}
func (g *Graph) init() {
if g.annotations == nil {
g.annotations = make(map[dag.Vertex]map[string]interface{})
}
if g.dependableMap == nil {
g.dependableMap = make(map[string]dag.Vertex)
}
@ -346,16 +290,6 @@ func (g *Graph) walk(walker GraphWalker) error {
return g.AcyclicGraph.Walk(walkFn)
}
// GraphNodeAnnotationInit is an interface that allows a node to
// initialize it's annotations.
//
// AnnotationInit will be called _once_ when the node is added to a
// graph for the first time and is expected to return it's initial
// annotations.
type GraphNodeAnnotationInit interface {
AnnotationInit() map[string]interface{}
}
// GraphNodeDependable is an interface which says that a node can be
// depended on (an edge can be placed between this node and another) according
// to the well-known name returned by DependableName.

159
terraform/graph_builder.go
View File

@ -4,8 +4,6 @@ import (
"fmt"
"log"
"strings"
"github.com/hashicorp/terraform/config/module"
)
// GraphBuilder is an interface that can be implemented and used with
@ -77,160 +75,3 @@ func (b *BasicGraphBuilder) Build(path []string) (*Graph, error) {
return g, nil
}
// BuiltinGraphBuilder is responsible for building the complete graph that
// Terraform uses for execution. It is an opinionated builder that defines
// the step order required to build a complete graph as is used and expected
// by Terraform.
//
// If you require a custom graph, you'll have to build it up manually
// on your own by building a new GraphBuilder implementation.
type BuiltinGraphBuilder struct {
// Root is the root module of the graph to build.
Root *module.Tree
// Diff is the diff. The proper module diffs will be looked up.
Diff *Diff
// State is the global state. The proper module states will be looked
// up by graph path.
State *State
// Providers is the list of providers supported.
Providers []string
// Provisioners is the list of provisioners supported.
Provisioners []string
// Targets is the user-specified list of resources to target.
Targets []string
// Destroy is set to true when we're in a `terraform destroy` or a
// `terraform plan -destroy`
Destroy bool
// Determines whether the GraphBuilder should perform graph validation before
// returning the Graph. Generally you want this to be done, except when you'd
// like to inspect a problematic graph.
Validate bool
// Verbose is set to true when the graph should be built "worst case",
// skipping any prune steps. This is used for early cycle detection during
// Validate and for manual inspection via `terraform graph -verbose`.
Verbose bool
}
// Build builds the graph according to the steps returned by Steps.
func (b *BuiltinGraphBuilder) Build(path []string) (*Graph, error) {
basic := &BasicGraphBuilder{
Steps: b.Steps(path),
Validate: b.Validate,
Name: "BuiltinGraphBuilder",
}
return basic.Build(path)
}
// Steps returns the ordered list of GraphTransformers that must be executed
// to build a complete graph.
func (b *BuiltinGraphBuilder) Steps(path []string) []GraphTransformer {
steps := []GraphTransformer{
// Create all our resources from the configuration and state
&ConfigTransformerOld{Module: b.Root},
&OrphanTransformer{
State: b.State,
Module: b.Root,
},
// Output-related transformations
&AddOutputOrphanTransformer{State: b.State},
// Provider-related transformations
&MissingProviderTransformer{Providers: b.Providers},
&ProviderTransformer{},
&DisableProviderTransformerOld{},
// Provisioner-related transformations
&MissingProvisionerTransformer{Provisioners: b.Provisioners},
&ProvisionerTransformer{},
// Run our vertex-level transforms
&VertexTransformer{
Transforms: []GraphVertexTransformer{
// Expand any statically expanded nodes, such as module graphs
&ExpandTransform{
Builder: b,
},
},
},
// Flatten stuff
&FlattenTransformer{},
// Make sure all the connections that are proxies are connected through
&ProxyTransformer{},
}
// If we're on the root path, then we do a bunch of other stuff.
// We don't do the following for modules.
if len(path) <= 1 {
steps = append(steps,
// Optionally reduces the graph to a user-specified list of targets and
// their dependencies.
&TargetsTransformer{Targets: b.Targets, Destroy: b.Destroy},
// Create orphan output nodes
&OrphanOutputTransformer{Module: b.Root, State: b.State},
// Prune the providers. This must happen only once because flattened
// modules might depend on empty providers.
&PruneProviderTransformer{},
// Create the destruction nodes
&DestroyTransformer{FullDestroy: b.Destroy},
b.conditional(&conditionalOpts{
If: func() bool { return !b.Destroy },
Then: &CreateBeforeDestroyTransformer{},
}),
b.conditional(&conditionalOpts{
If: func() bool { return !b.Verbose },
Then: &PruneDestroyTransformer{Diff: b.Diff, State: b.State},
}),
// Remove the noop nodes
&PruneNoopTransformer{Diff: b.Diff, State: b.State},
// Insert nodes to close opened plugin connections
&CloseProviderTransformer{},
&CloseProvisionerTransformer{},
// Perform the transitive reduction to make our graph a bit
// more sane if possible (it usually is possible).
&TransitiveReductionTransformer{},
)
}
// Make sure we have a single root
steps = append(steps, &RootTransformer{})
// Remove nils
for i, s := range steps {
if s == nil {
steps = append(steps[:i], steps[i+1:]...)
}
}
return steps
}
type conditionalOpts struct {
If func() bool
Then GraphTransformer
}
func (b *BuiltinGraphBuilder) conditional(o *conditionalOpts) GraphTransformer {
if o.If != nil && o.Then != nil && o.If() {
return o.Then
}
return nil
}

279
terraform/graph_builder_test.go
View File

@ -65,212 +65,6 @@ func TestBasicGraphBuilder_validateOff(t *testing.T) {
}
}
func TestBuiltinGraphBuilder_impl(t *testing.T) {
var _ GraphBuilder = new(BuiltinGraphBuilder)
}
// This test is not meant to test all the transforms but rather just
// to verify we get some basic sane graph out. Special tests to ensure
// specific ordering of steps should be added in other tests.
func TestBuiltinGraphBuilder(t *testing.T) {
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-basic"),
Validate: true,
}
g, err := b.Build(RootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testBuiltinGraphBuilderBasicStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
func TestBuiltinGraphBuilder_Verbose(t *testing.T) {
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-basic"),
Validate: true,
Verbose: true,
}
g, err := b.Build(RootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testBuiltinGraphBuilderVerboseStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
// This tests that the CreateBeforeDestoryTransformer is not present when
// we perform a "terraform destroy" operation. We don't actually do anything
// else.
func TestBuiltinGraphBuilder_CreateBeforeDestroy_Destroy_Bypass(t *testing.T) {
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-basic"),
Validate: true,
Destroy: true,
}
steps := b.Steps([]string{})
actual := false
expected := false
for _, v := range steps {
switch v.(type) {
case *CreateBeforeDestroyTransformer:
actual = true
}
}
if actual != expected {
t.Fatalf("bad: CreateBeforeDestroyTransformer still in root path")
}
}
// This tests that the CreateBeforeDestoryTransformer *is* present
// during a non-destroy operation (ie: Destroy not set).
func TestBuiltinGraphBuilder_CreateBeforeDestroy_NonDestroy_Present(t *testing.T) {
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-basic"),
Validate: true,
}
steps := b.Steps([]string{})
actual := false
expected := true
for _, v := range steps {
switch v.(type) {
case *CreateBeforeDestroyTransformer:
actual = true
}
}
if actual != expected {
t.Fatalf("bad: CreateBeforeDestroyTransformer not in root path")
}
}
// This tests a cycle we got when a CBD resource depends on a non-CBD
// resource. This cycle shouldn't happen in the general case anymore.
func TestBuiltinGraphBuilder_cbdDepNonCbd(t *testing.T) {
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-cbd-non-cbd"),
Validate: true,
}
_, err := b.Build(RootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
}
// This now returns no errors due to a general fix while building the graph
func TestBuiltinGraphBuilder_cbdDepNonCbd_errorsWhenVerbose(t *testing.T) {
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-cbd-non-cbd"),
Validate: true,
Verbose: true,
}
_, err := b.Build(RootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
}
func TestBuiltinGraphBuilder_multiLevelModule(t *testing.T) {
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-multi-level-module"),
Validate: true,
}
g, err := b.Build(RootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testBuiltinGraphBuilderMultiLevelStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
func TestBuiltinGraphBuilder_orphanDeps(t *testing.T) {
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: rootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.foo": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
"aws_instance.bar": &ResourceState{
Type: "aws_instance",
Dependencies: []string{"aws_instance.foo"},
Primary: &InstanceState{
ID: "bar",
},
},
},
},
},
}
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-orphan-deps"),
State: state,
Validate: true,
}
g, err := b.Build(RootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testBuiltinGraphBuilderOrphanDepsStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
/*
TODO: This exposes a really bad bug we need to fix after we merge
the f-ast-branch. This bug still exists in master.
// This test tests that the graph builder properly expands modules.
func TestBuiltinGraphBuilder_modules(t *testing.T) {
b := &BuiltinGraphBuilder{
Root: testModule(t, "graph-builder-modules"),
}
g, err := b.Build(RootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testBuiltinGraphBuilderModuleStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
*/
type testBasicGraphBuilderTransform struct {
V dag.Vertex
}
@ -283,76 +77,3 @@ func (t *testBasicGraphBuilderTransform) Transform(g *Graph) error {
const testBasicGraphBuilderStr = `
1
`
const testBuiltinGraphBuilderBasicStr = `
aws_instance.db
provider.aws
aws_instance.web
aws_instance.db
provider.aws
provider.aws (close)
aws_instance.web
`
const testBuiltinGraphBuilderVerboseStr = `
aws_instance.db
aws_instance.db (destroy)
aws_instance.db (destroy)
aws_instance.web (destroy)
aws_instance.web
aws_instance.db
aws_instance.web (destroy)
provider.aws
provider.aws
provider.aws (close)
aws_instance.web
`
const testBuiltinGraphBuilderMultiLevelStr = `
module.foo.module.bar.output.value
module.foo.module.bar.var.bar
module.foo.var.foo
module.foo.module.bar.plan-destroy
module.foo.module.bar.var.bar
module.foo.var.foo
module.foo.plan-destroy
module.foo.var.foo
root
module.foo.module.bar.output.value
module.foo.module.bar.plan-destroy
module.foo.module.bar.var.bar
module.foo.plan-destroy
module.foo.var.foo
`
const testBuiltinGraphBuilderOrphanDepsStr = `
aws_instance.bar (orphan)
provider.aws
aws_instance.foo (orphan)
aws_instance.bar (orphan)
provider.aws
provider.aws (close)
aws_instance.foo (orphan)
`
/*
TODO: Commented out this const as it's likely this needs to
be updated when the TestBuiltinGraphBuilder_modules test is
enabled again.
const testBuiltinGraphBuilderModuleStr = `
aws_instance.web
aws_instance.web (destroy)
aws_instance.web (destroy)
aws_security_group.firewall
module.consul (expanded)
provider.aws
aws_security_group.firewall
aws_security_group.firewall (destroy)
aws_security_group.firewall (destroy)
provider.aws
module.consul (expanded)
aws_security_group.firewall
provider.aws
provider.aws
`
*/

37
terraform/graph_config_node.go
View File

@ -1,37 +0,0 @@
package terraform
import (
"github.com/hashicorp/terraform/dag"
)
// graphNodeConfig is an interface that all graph nodes for the
// configuration graph need to implement in order to build the variable
// dependencies properly.
type graphNodeConfig interface {
dag.NamedVertex
// All graph nodes should be dependent on other things, and able to
// be depended on.
GraphNodeDependable
GraphNodeDependent
// ConfigType returns the type of thing in the configuration that
// this node represents, such as a resource, module, etc.
ConfigType() GraphNodeConfigType
}
// GraphNodeAddressable is an interface that all graph nodes for the
// configuration graph need to implement in order to be be addressed / targeted
// properly.
type GraphNodeAddressable interface {
ResourceAddress() *ResourceAddress
}
// GraphNodeTargetable is an interface for graph nodes to implement when they
// need to be told about incoming targets. This is useful for nodes that need
// to respect targets as they dynamically expand. Note that the list of targets
// provided will contain every target provided, and each implementing graph
// node must filter this list to targets considered relevant.
type GraphNodeTargetable interface {
SetTargets([]ResourceAddress)
}

215
terraform/graph_config_node_module.go
View File

@ -1,215 +0,0 @@
package terraform
import (
"fmt"
"strings"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/config/module"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeConfigModule represents a module within the configuration graph.
type GraphNodeConfigModule struct {
Path []string
Module *config.Module
Tree *module.Tree
}
func (n *GraphNodeConfigModule) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeModule
}
func (n *GraphNodeConfigModule) DependableName() []string {
config := n.Tree.Config()
result := make([]string, 1, len(config.Outputs)+1)
result[0] = n.Name()
for _, o := range config.Outputs {
result = append(result, fmt.Sprintf("%s.output.%s", n.Name(), o.Name))
}
return result
}
func (n *GraphNodeConfigModule) DependentOn() []string {
vars := n.Module.RawConfig.Variables
result := make([]string, 0, len(vars))
for _, v := range vars {
if vn := varNameForVar(v); vn != "" {
result = append(result, vn)
}
}
return result
}
func (n *GraphNodeConfigModule) Name() string {
return fmt.Sprintf("module.%s", n.Module.Name)
}
// GraphNodeExpandable
func (n *GraphNodeConfigModule) Expand(b GraphBuilder) (GraphNodeSubgraph, error) {
// Build the graph first
graph, err := b.Build(n.Path)
if err != nil {
return nil, err
}
{
// Add the destroy marker to the graph
t := &ModuleDestroyTransformerOld{}
if err := t.Transform(graph); err != nil {
return nil, err
}
}
// Build the actual subgraph node
return &graphNodeModuleExpanded{
Original: n,
Graph: graph,
Variables: make(map[string]interface{}),
}, nil
}
// GraphNodeExpandable
func (n *GraphNodeConfigModule) ProvidedBy() []string {
// Build up the list of providers by simply going over our configuration
// to find the providers that are configured there as well as the
// providers that the resources use.
config := n.Tree.Config()
providers := make(map[string]struct{})
for _, p := range config.ProviderConfigs {
providers[p.Name] = struct{}{}
}
for _, r := range config.Resources {
providers[resourceProvider(r.Type, r.Provider)] = struct{}{}
}
// Turn the map into a string. This makes sure that the list is
// de-dupped since we could be going over potentially many resources.
result := make([]string, 0, len(providers))
for p, _ := range providers {
result = append(result, p)
}
return result
}
// graphNodeModuleExpanded represents a module where the graph has
// been expanded. It stores the graph of the module as well as a reference
// to the map of variables.
type graphNodeModuleExpanded struct {
Original *GraphNodeConfigModule
Graph *Graph
// Variables is a map of the input variables. This reference should
// be shared with ModuleInputTransformer in order to create a connection
// where the variables are set properly.
Variables map[string]interface{}
}
func (n *graphNodeModuleExpanded) Name() string {
return fmt.Sprintf("%s (expanded)", dag.VertexName(n.Original))
}
func (n *graphNodeModuleExpanded) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeModule
}
// GraphNodeDependable
func (n *graphNodeModuleExpanded) DependableName() []string {
return n.Original.DependableName()
}
// GraphNodeDependent
func (n *graphNodeModuleExpanded) DependentOn() []string {
return n.Original.DependentOn()
}
// GraphNodeDotter impl.
func (n *graphNodeModuleExpanded) DotNode(name string, opts *dag.DotOpts) *dag.DotNode {
return &dag.DotNode{
Name: name,
Attrs: map[string]string{
"label": dag.VertexName(n.Original),
"shape": "component",
},
}
}
// GraphNodeEvalable impl.
func (n *graphNodeModuleExpanded) EvalTree() EvalNode {
var resourceConfig *ResourceConfig
return &EvalSequence{
Nodes: []EvalNode{
&EvalInterpolate{
Config: n.Original.Module.RawConfig,
Output: &resourceConfig,
},
&EvalVariableBlock{
Config: &resourceConfig,
VariableValues: n.Variables,
},
},
}
}
// GraphNodeFlattenable impl.
func (n *graphNodeModuleExpanded) FlattenGraph() *Graph {
graph := n.Subgraph().(*Graph)
input := n.Original.Module.RawConfig
// Go over each vertex and do some modifications to the graph for
// flattening. We have to skip some nodes (graphNodeModuleSkippable)
// as well as setup the variable values.
for _, v := range graph.Vertices() {
// If this is a variable, then look it up in the raw configuration.
// If it exists in the raw configuration, set the value of it.
if vn, ok := v.(*GraphNodeConfigVariable); ok && input != nil {
key := vn.VariableName()
if v, ok := input.Raw[key]; ok {
config, err := config.NewRawConfig(map[string]interface{}{
key: v,
})
if err != nil {
// This shouldn't happen because it is already in
// a RawConfig above meaning it worked once before.
panic(err)
}
// Set the variable value so it is interpolated properly.
// Also set the module so we set the value on it properly.
vn.Module = graph.Path[len(graph.Path)-1]
vn.Value = config
}
}
}
return graph
}
// GraphNodeSubgraph impl.
func (n *graphNodeModuleExpanded) Subgraph() dag.Grapher {
return n.Graph
}
func modulePrefixStr(p []string) string {
parts := make([]string, 0, len(p)*2)
for _, p := range p[1:] {
parts = append(parts, "module", p)
}
return strings.Join(parts, ".")
}
func modulePrefixList(result []string, prefix string) []string {
if prefix != "" {
for i, v := range result {
result[i] = fmt.Sprintf("%s.%s", prefix, v)
}
}
return result
}

80
terraform/graph_config_node_module_test.go
View File

@ -1,80 +0,0 @@
package terraform
import (
"strings"
"testing"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
func TestGraphNodeConfigModule_impl(t *testing.T) {
var _ dag.Vertex = new(GraphNodeConfigModule)
var _ dag.NamedVertex = new(GraphNodeConfigModule)
var _ graphNodeConfig = new(GraphNodeConfigModule)
var _ GraphNodeExpandable = new(GraphNodeConfigModule)
}
func TestGraphNodeConfigModuleExpand(t *testing.T) {
mod := testModule(t, "graph-node-module-expand")
node := &GraphNodeConfigModule{
Path: []string{RootModuleName, "child"},
Module: &config.Module{},
Tree: nil,
}
g, err := node.Expand(&BasicGraphBuilder{
Steps: []GraphTransformer{
&ConfigTransformerOld{Module: mod},
},
})
if err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.Subgraph().(*Graph).String())
expected := strings.TrimSpace(testGraphNodeModuleExpandStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestGraphNodeConfigModuleExpandFlatten(t *testing.T) {
mod := testModule(t, "graph-node-module-flatten")
node := &GraphNodeConfigModule{
Path: []string{RootModuleName, "child"},
Module: &config.Module{},
Tree: nil,
}
g, err := node.Expand(&BasicGraphBuilder{
Steps: []GraphTransformer{
&ConfigTransformerOld{Module: mod},
},
})
if err != nil {
t.Fatalf("err: %s", err)
}
fg := g.(GraphNodeFlatGraph)
actual := strings.TrimSpace(fg.FlattenGraph().String())
expected := strings.TrimSpace(testGraphNodeModuleExpandFlattenStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
const testGraphNodeModuleExpandStr = `
aws_instance.bar
aws_instance.foo
aws_instance.foo
plan-destroy
`
const testGraphNodeModuleExpandFlattenStr = `
aws_instance.foo
plan-destroy
`

106
terraform/graph_config_node_output.go
View File

@ -1,106 +0,0 @@
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeConfigOutput represents an output configured within the
// configuration.
type GraphNodeConfigOutput struct {
Output *config.Output
}
func (n *GraphNodeConfigOutput) Name() string {
return fmt.Sprintf("output.%s", n.Output.Name)
}
func (n *GraphNodeConfigOutput) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeOutput
}
func (n *GraphNodeConfigOutput) OutputName() string {
return n.Output.Name
}
func (n *GraphNodeConfigOutput) DependableName() []string {
return []string{n.Name()}
}
func (n *GraphNodeConfigOutput) DependentOn() []string {
vars := n.Output.RawConfig.Variables
result := make([]string, 0, len(vars))
for _, v := range vars {
if vn := varNameForVar(v); vn != "" {
result = append(result, vn)
}
}
return result
}
// GraphNodeEvalable impl.
func (n *GraphNodeConfigOutput) EvalTree() EvalNode {
return &EvalOpFilter{
Ops: []walkOperation{walkRefresh, walkPlan, walkApply,
walkDestroy, walkInput, walkValidate},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalWriteOutput{
Name: n.Output.Name,
Sensitive: n.Output.Sensitive,
Value: n.Output.RawConfig,
},
},
},
}
}
// GraphNodeProxy impl.
func (n *GraphNodeConfigOutput) Proxy() bool {
return true
}
// GraphNodeDestroyEdgeInclude impl.
func (n *GraphNodeConfigOutput) DestroyEdgeInclude(dag.Vertex) bool {
return false
}
// GraphNodeFlattenable impl.
func (n *GraphNodeConfigOutput) Flatten(p []string) (dag.Vertex, error) {
return &GraphNodeConfigOutputFlat{
GraphNodeConfigOutput: n,
PathValue: p,
}, nil
}
// Same as GraphNodeConfigOutput, but for flattening
type GraphNodeConfigOutputFlat struct {
*GraphNodeConfigOutput
PathValue []string
}
func (n *GraphNodeConfigOutputFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.GraphNodeConfigOutput.Name())
}
func (n *GraphNodeConfigOutputFlat) Path() []string {
return n.PathValue
}
func (n *GraphNodeConfigOutputFlat) DependableName() []string {
return modulePrefixList(
n.GraphNodeConfigOutput.DependableName(),
modulePrefixStr(n.PathValue))
}
func (n *GraphNodeConfigOutputFlat) DependentOn() []string {
prefix := modulePrefixStr(n.PathValue)
return modulePrefixList(
n.GraphNodeConfigOutput.DependentOn(),
prefix)
}

133
terraform/graph_config_node_provider.go
View File

@ -1,133 +0,0 @@
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeConfigProvider represents a configured provider within the
// configuration graph. These are only immediately in the graph when an
// explicit `provider` configuration block is in the configuration.
type GraphNodeConfigProvider struct {
Provider *config.ProviderConfig
}
func (n *GraphNodeConfigProvider) Name() string {
return fmt.Sprintf("provider.%s", n.ProviderName())
}
func (n *GraphNodeConfigProvider) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeProvider
}
func (n *GraphNodeConfigProvider) DependableName() []string {
return []string{n.Name()}
}
func (n *GraphNodeConfigProvider) DependentOn() []string {
vars := n.Provider.RawConfig.Variables
result := make([]string, 0, len(vars))
for _, v := range vars {
if vn := varNameForVar(v); vn != "" {
result = append(result, vn)
}
}
return result
}
// GraphNodeEvalable impl.
func (n *GraphNodeConfigProvider) EvalTree() EvalNode {
return ProviderEvalTree(n.ProviderName(), n.Provider.RawConfig)
}
// GraphNodeProvider implementation
func (n *GraphNodeConfigProvider) ProviderName() string {
if n.Provider.Alias == "" {
return n.Provider.Name
} else {
return fmt.Sprintf("%s.%s", n.Provider.Name, n.Provider.Alias)
}
}
// GraphNodeProvider implementation
func (n *GraphNodeConfigProvider) ProviderConfig() *config.RawConfig {
return n.Provider.RawConfig
}
// GraphNodeDotter impl.
func (n *GraphNodeConfigProvider) DotNode(name string, opts *dag.DotOpts) *dag.DotNode {
return &dag.DotNode{
Name: name,
Attrs: map[string]string{
"label": n.Name(),
"shape": "diamond",
},
}
}
// GraphNodeDotterOrigin impl.
func (n *GraphNodeConfigProvider) DotOrigin() bool {
return true
}
// GraphNodeFlattenable impl.
func (n *GraphNodeConfigProvider) Flatten(p []string) (dag.Vertex, error) {
return &GraphNodeConfigProviderFlat{
GraphNodeConfigProvider: n,
PathValue: p,
}, nil
}
// Same as GraphNodeConfigProvider, but for flattening
type GraphNodeConfigProviderFlat struct {
*GraphNodeConfigProvider
PathValue []string
}
func (n *GraphNodeConfigProviderFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.GraphNodeConfigProvider.Name())
}
func (n *GraphNodeConfigProviderFlat) Path() []string {
return n.PathValue
}
func (n *GraphNodeConfigProviderFlat) DependableName() []string {
return modulePrefixList(
n.GraphNodeConfigProvider.DependableName(),
modulePrefixStr(n.PathValue))
}
func (n *GraphNodeConfigProviderFlat) DependentOn() []string {
prefixed := modulePrefixList(
n.GraphNodeConfigProvider.DependentOn(),
modulePrefixStr(n.PathValue))
result := make([]string, len(prefixed), len(prefixed)+1)
copy(result, prefixed)
// If we're in a module, then depend on our parent's provider
if len(n.PathValue) > 1 {
prefix := modulePrefixStr(n.PathValue[:len(n.PathValue)-1])
if prefix != "" {
prefix += "."
}
result = append(result, fmt.Sprintf(
"%s%s",
prefix, n.GraphNodeConfigProvider.Name()))
}
return result
}
func (n *GraphNodeConfigProviderFlat) ProviderName() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue),
n.GraphNodeConfigProvider.ProviderName())
}

539
terraform/graph_config_node_resource.go
View File

@ -1,539 +0,0 @@
package terraform
import (
"fmt"
"log"
"strings"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeCountDependent is implemented by resources for giving only
// the dependencies they have from the "count" field.
type GraphNodeCountDependent interface {
CountDependentOn() []string
}
// GraphNodeConfigResource represents a resource within the config graph.
type GraphNodeConfigResource struct {
Resource *config.Resource
// If set to true, this resource represents a resource
// that will be destroyed in some way.
Destroy bool
// Used during DynamicExpand to target indexes
Targets []ResourceAddress
Path []string
}
func (n *GraphNodeConfigResource) Copy() *GraphNodeConfigResource {
ncr := &GraphNodeConfigResource{
Resource: n.Resource.Copy(),
Destroy: n.Destroy,
Targets: make([]ResourceAddress, 0, len(n.Targets)),
Path: make([]string, 0, len(n.Path)),
}
for _, t := range n.Targets {
ncr.Targets = append(ncr.Targets, *t.Copy())
}
for _, p := range n.Path {
ncr.Path = append(ncr.Path, p)
}
return ncr
}
func (n *GraphNodeConfigResource) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeResource
}
func (n *GraphNodeConfigResource) DependableName() []string {
return []string{n.Resource.Id()}
}
// GraphNodeCountDependent impl.
func (n *GraphNodeConfigResource) CountDependentOn() []string {
result := make([]string, 0, len(n.Resource.RawCount.Variables))
for _, v := range n.Resource.RawCount.Variables {
if vn := varNameForVar(v); vn != "" {
result = append(result, vn)
}
}
return result
}
// GraphNodeDependent impl.
func (n *GraphNodeConfigResource) DependentOn() []string {
result := make([]string, len(n.Resource.DependsOn),
(len(n.Resource.RawCount.Variables)+
len(n.Resource.RawConfig.Variables)+
len(n.Resource.DependsOn))*2)
copy(result, n.Resource.DependsOn)
for _, v := range n.Resource.RawCount.Variables {
if vn := varNameForVar(v); vn != "" {
result = append(result, vn)
}
}
for _, v := range n.Resource.RawConfig.Variables {
if vn := varNameForVar(v); vn != "" {
result = append(result, vn)
}
}
for _, p := range n.Resource.Provisioners {
for _, v := range p.ConnInfo.Variables {
if vn := varNameForVar(v); vn != "" && vn != n.Resource.Id() {
result = append(result, vn)
}
}
for _, v := range p.RawConfig.Variables {
if vn := varNameForVar(v); vn != "" && vn != n.Resource.Id() {
result = append(result, vn)
}
}
}
return result
}
// VarWalk calls a callback for all the variables that this resource
// depends on.
func (n *GraphNodeConfigResource) VarWalk(fn func(config.InterpolatedVariable)) {
for _, v := range n.Resource.RawCount.Variables {
fn(v)
}
for _, v := range n.Resource.RawConfig.Variables {
fn(v)
}
for _, p := range n.Resource.Provisioners {
for _, v := range p.ConnInfo.Variables {
fn(v)
}
for _, v := range p.RawConfig.Variables {
fn(v)
}
}
}
func (n *GraphNodeConfigResource) Name() string {
result := n.Resource.Id()
if n.Destroy {
result += " (destroy)"
}
return result
}
// GraphNodeDotter impl.
func (n *GraphNodeConfigResource) DotNode(name string, opts *dag.DotOpts) *dag.DotNode {
if n.Destroy && !opts.Verbose {
return nil
}
return &dag.DotNode{
Name: name,
Attrs: map[string]string{
"label": n.Name(),
"shape": "box",
},
}
}
// GraphNodeFlattenable impl.
func (n *GraphNodeConfigResource) Flatten(p []string) (dag.Vertex, error) {
return &GraphNodeConfigResourceFlat{
GraphNodeConfigResource: n,
PathValue: p,
}, nil
}
// GraphNodeDynamicExpandable impl.
func (n *GraphNodeConfigResource) DynamicExpand(ctx EvalContext) (*Graph, error) {
state, lock := ctx.State()
lock.RLock()
defer lock.RUnlock()
// Start creating the steps
steps := make([]GraphTransformer, 0, 5)
// Expand counts.
steps = append(steps, &ResourceCountTransformerOld{
Resource: n.Resource,
Destroy: n.Destroy,
Targets: n.Targets,
})
// Additional destroy modifications.
if n.Destroy {
// If we're destroying a primary or tainted resource, we want to
// expand orphans, which have all the same semantics in a destroy
// as a primary or tainted resource.
steps = append(steps, &OrphanTransformer{
Resource: n.Resource,
State: state,
View: n.Resource.Id(),
})
steps = append(steps, &DeposedTransformer{
State: state,
View: n.Resource.Id(),
})
}
// We always want to apply targeting
steps = append(steps, &TargetsTransformer{
ParsedTargets: n.Targets,
Destroy: n.Destroy,
})
// Always end with the root being added
steps = append(steps, &RootTransformer{})
// Build the graph
b := &BasicGraphBuilder{
Steps: steps,
Validate: true,
Name: "GraphNodeConfigResource",
}
return b.Build(ctx.Path())
}
// GraphNodeAddressable impl.
func (n *GraphNodeConfigResource) ResourceAddress() *ResourceAddress {
return &ResourceAddress{
Path: n.Path[1:],
Index: -1,
InstanceType: TypePrimary,
Name: n.Resource.Name,
Type: n.Resource.Type,
Mode: n.Resource.Mode,
}
}
// GraphNodeTargetable impl.
func (n *GraphNodeConfigResource) SetTargets(targets []ResourceAddress) {
n.Targets = targets
}
// GraphNodeEvalable impl.
func (n *GraphNodeConfigResource) EvalTree() EvalNode {
return &EvalSequence{
Nodes: []EvalNode{
&EvalInterpolate{Config: n.Resource.RawCount},
&EvalCountCheckComputed{Resource: n.Resource},
&EvalOpFilter{
Ops: []walkOperation{walkValidate},
Node: &EvalValidateCount{Resource: n.Resource},
},
&EvalCountFixZeroOneBoundary{Resource: n.Resource},
},
}
}
// GraphNodeProviderConsumer
func (n *GraphNodeConfigResource) ProvidedBy() []string {
return []string{resourceProvider(n.Resource.Type, n.Resource.Provider)}
}
// GraphNodeProvisionerConsumer
func (n *GraphNodeConfigResource) ProvisionedBy() []string {
result := make([]string, len(n.Resource.Provisioners))
for i, p := range n.Resource.Provisioners {
result[i] = p.Type
}
return result
}
// GraphNodeDestroyable
func (n *GraphNodeConfigResource) DestroyNode() GraphNodeDestroy {
// If we're already a destroy node, then don't do anything
if n.Destroy {
return nil
}
result := &graphNodeResourceDestroy{
GraphNodeConfigResource: *n.Copy(),
Original: n,
}
result.Destroy = true
return result
}
// GraphNodeNoopPrunable
func (n *GraphNodeConfigResource) Noop(opts *NoopOpts) bool {
log.Printf("[DEBUG] Checking resource noop: %s", n.Name())
// We don't have any noop optimizations for destroy nodes yet
if n.Destroy {
log.Printf("[DEBUG] Destroy node, not a noop")
return false
}
// If there is no diff, then we aren't a noop since something needs to
// be done (such as a plan). We only check if we're a noop in a diff.
if opts.Diff == nil || opts.Diff.Empty() {
log.Printf("[DEBUG] No diff, not a noop")
return false
}
// If the count has any interpolations, we can't prune this node since
// we need to be sure to evaluate the count so that splat variables work
// later (which need to know the full count).
if len(n.Resource.RawCount.Interpolations) > 0 {
log.Printf("[DEBUG] Count has interpolations, not a noop")
return false
}
// If we have no module diff, we're certainly a noop. This is because
// it means there is a diff, and that the module we're in just isn't
// in it, meaning we're not doing anything.
if opts.ModDiff == nil || opts.ModDiff.Empty() {
log.Printf("[DEBUG] No mod diff, treating resource as a noop")
return true
}
// Grab the ID which is the prefix (in the case count > 0 at some point)
prefix := n.Resource.Id()
// Go through the diff and if there are any with our name on it, keep us
found := false
for k, _ := range opts.ModDiff.Resources {
if strings.HasPrefix(k, prefix) {
log.Printf("[DEBUG] Diff has %s, resource is not a noop", k)
found = true
break
}
}
log.Printf("[DEBUG] Final noop value: %t", !found)
return !found
}
// Same as GraphNodeConfigResource, but for flattening
type GraphNodeConfigResourceFlat struct {
*GraphNodeConfigResource
PathValue []string
}
func (n *GraphNodeConfigResourceFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.GraphNodeConfigResource.Name())
}
func (n *GraphNodeConfigResourceFlat) Path() []string {
return n.PathValue
}
func (n *GraphNodeConfigResourceFlat) DependableName() []string {
return modulePrefixList(
n.GraphNodeConfigResource.DependableName(),
modulePrefixStr(n.PathValue))
}
func (n *GraphNodeConfigResourceFlat) DependentOn() []string {
prefix := modulePrefixStr(n.PathValue)
return modulePrefixList(
n.GraphNodeConfigResource.DependentOn(),
prefix)
}
func (n *GraphNodeConfigResourceFlat) ProvidedBy() []string {
prefix := modulePrefixStr(n.PathValue)
return modulePrefixList(
n.GraphNodeConfigResource.ProvidedBy(),
prefix)
}
func (n *GraphNodeConfigResourceFlat) ProvisionedBy() []string {
prefix := modulePrefixStr(n.PathValue)
return modulePrefixList(
n.GraphNodeConfigResource.ProvisionedBy(),
prefix)
}
// GraphNodeDestroyable impl.
func (n *GraphNodeConfigResourceFlat) DestroyNode() GraphNodeDestroy {
// Get our parent destroy node. If we don't have any, just return
raw := n.GraphNodeConfigResource.DestroyNode()
if raw == nil {
return nil
}
node, ok := raw.(*graphNodeResourceDestroy)
if !ok {
panic(fmt.Sprintf("unknown destroy node: %s %T", dag.VertexName(raw), raw))
}
// Otherwise, wrap it so that it gets the proper module treatment.
return &graphNodeResourceDestroyFlat{
graphNodeResourceDestroy: node,
PathValue: n.PathValue,
FlatCreateNode: n,
}
}
type graphNodeResourceDestroyFlat struct {
*graphNodeResourceDestroy
PathValue []string
// Needs to be able to properly yield back a flattened create node to prevent
FlatCreateNode *GraphNodeConfigResourceFlat
}
func (n *graphNodeResourceDestroyFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeResourceDestroy.Name())
}
func (n *graphNodeResourceDestroyFlat) Path() []string {
return n.PathValue
}
func (n *graphNodeResourceDestroyFlat) CreateNode() dag.Vertex {
return n.FlatCreateNode
}
func (n *graphNodeResourceDestroyFlat) ProvidedBy() []string {
prefix := modulePrefixStr(n.PathValue)
return modulePrefixList(
n.GraphNodeConfigResource.ProvidedBy(),
prefix)
}
// graphNodeResourceDestroy represents the logical destruction of a
// resource. This node doesn't mean it will be destroyed for sure, but
// instead that if a destroy were to happen, it must happen at this point.
type graphNodeResourceDestroy struct {
GraphNodeConfigResource
Original *GraphNodeConfigResource
}
func (n *graphNodeResourceDestroy) CreateBeforeDestroy() bool {
// CBD is enabled if the resource enables it
return n.Original.Resource.Lifecycle.CreateBeforeDestroy && n.Destroy
}
func (n *graphNodeResourceDestroy) CreateNode() dag.Vertex {
return n.Original
}
func (n *graphNodeResourceDestroy) DestroyInclude(d *ModuleDiff, s *ModuleState) bool {
if n.Destroy {
return n.destroyInclude(d, s)
}
return true
}
func (n *graphNodeResourceDestroy) destroyInclude(
d *ModuleDiff, s *ModuleState) bool {
// Get the count, and specifically the raw value of the count
// (with interpolations and all). If the count is NOT a static "1",
// then we keep the destroy node no matter what.
//
// The reasoning for this is complicated and not intuitively obvious,
// but I attempt to explain it below.
//
// The destroy transform works by generating the worst case graph,
// with worst case being the case that every resource already exists
// and needs to be destroy/created (force-new). There is a single important
// edge case where this actually results in a real-life cycle: if a
// create-before-destroy (CBD) resource depends on a non-CBD resource.
// Imagine a EC2 instance "foo" with CBD depending on a security
// group "bar" without CBD, and conceptualize the worst case destroy
// order:
//
// 1.) SG must be destroyed (non-CBD)
// 2.) SG must be created/updated
// 3.) EC2 instance must be created (CBD, requires the SG be made)
// 4.) EC2 instance must be destroyed (requires SG be destroyed)
//
// Except, #1 depends on #4, since the SG can't be destroyed while
// an EC2 instance is using it (AWS API requirements). As you can see,
// this is a real life cycle that can't be automatically reconciled
// except under two conditions:
//
// 1.) SG is also CBD. This doesn't work 100% of the time though
// since the non-CBD resource might not support CBD. To make matters
// worse, the entire transitive closure of dependencies must be
// CBD (if the SG depends on a VPC, you have the same problem).
// 2.) EC2 must not CBD. This can't happen automatically because CBD
// is used as a way to ensure zero (or minimal) downtime Terraform
// applies, and it isn't acceptable for TF to ignore this request,
// since it can result in unexpected downtime.
//
// Therefore, we compromise with this edge case here: if there is
// a static count of "1", we prune the diff to remove cycles during a
// graph optimization path if we don't see the resource in the diff.
// If the count is set to ANYTHING other than a static "1" (variable,
// computed attribute, static number greater than 1), then we keep the
// destroy, since it is required for dynamic graph expansion to find
// orphan count objects.
//
// This isn't ideal logic, but its strictly better without introducing
// new impossibilities. It breaks the cycle in practical cases, and the
// cycle comes back in no cases we've found to be practical, but just
// as the cycle would already exist without this anyways.
count := n.Original.Resource.RawCount
if raw := count.Raw[count.Key]; raw != "1" {
return true
}
// Okay, we're dealing with a static count. There are a few ways
// to include this resource.
prefix := n.Original.Resource.Id()
// If we're present in the diff proper, then keep it. We're looking
// only for resources in the diff that match our resource or a count-index
// of our resource that are marked for destroy.
if d != nil {
for k, v := range d.Resources {
match := k == prefix || strings.HasPrefix(k, prefix+".")
if match && v.GetDestroy() {
return true
}
}
}
// If we're in the state as a primary in any form, then keep it.
// This does a prefix check so it will also catch orphans on count
// decreases to "1".
if s != nil {
for k, v := range s.Resources {
// Ignore exact matches
if k == prefix {
continue
}
// Ignore anything that doesn't have a "." afterwards so that
// we only get our own resource and any counts on it.
if !strings.HasPrefix(k, prefix+".") {
continue
}
// Ignore exact matches and the 0'th index. We only care
// about if there is a decrease in count.
if k == prefix+".0" {
continue
}
if v.Primary != nil {
return true
}
}
// If we're in the state as _both_ "foo" and "foo.0", then
// keep it, since we treat the latter as an orphan.
_, okOne := s.Resources[prefix]
_, okTwo := s.Resources[prefix+".0"]
if okOne && okTwo {
return true
}
}
return false
}

110
terraform/graph_config_node_test.go
View File

@ -1,110 +0,0 @@
package terraform
import (
"reflect"
"testing"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
func TestGraphNodeConfigOutput_impl(t *testing.T) {
var _ dag.Vertex = new(GraphNodeConfigOutput)
var _ dag.NamedVertex = new(GraphNodeConfigOutput)
var _ graphNodeConfig = new(GraphNodeConfigOutput)
var _ GraphNodeOutput = new(GraphNodeConfigOutput)
var _ GraphNodeProxy = new(GraphNodeConfigOutput)
}
func TestGraphNodeConfigProvider_impl(t *testing.T) {
var _ dag.Vertex = new(GraphNodeConfigProvider)
var _ dag.NamedVertex = new(GraphNodeConfigProvider)
var _ graphNodeConfig = new(GraphNodeConfigProvider)
var _ GraphNodeProvider = new(GraphNodeConfigProvider)
}
func TestGraphNodeConfigProvider_ProviderName(t *testing.T) {
n := &GraphNodeConfigProvider{
Provider: &config.ProviderConfig{Name: "foo"},
}
if v := n.ProviderName(); v != "foo" {
t.Fatalf("bad: %#v", v)
}
}
func TestGraphNodeConfigProvider_ProviderName_alias(t *testing.T) {
n := &GraphNodeConfigProvider{
Provider: &config.ProviderConfig{Name: "foo", Alias: "bar"},
}
if v := n.ProviderName(); v != "foo.bar" {
t.Fatalf("bad: %#v", v)
}
}
func TestGraphNodeConfigProvider_Name(t *testing.T) {
n := &GraphNodeConfigProvider{
Provider: &config.ProviderConfig{Name: "foo"},
}
if v := n.Name(); v != "provider.foo" {
t.Fatalf("bad: %#v", v)
}
}
func TestGraphNodeConfigProvider_Name_alias(t *testing.T) {
n := &GraphNodeConfigProvider{
Provider: &config.ProviderConfig{Name: "foo", Alias: "bar"},
}
if v := n.Name(); v != "provider.foo.bar" {
t.Fatalf("bad: %#v", v)
}
}
func TestGraphNodeConfigResource_impl(t *testing.T) {
var _ dag.Vertex = new(GraphNodeConfigResource)
var _ dag.NamedVertex = new(GraphNodeConfigResource)
var _ graphNodeConfig = new(GraphNodeConfigResource)
var _ GraphNodeProviderConsumer = new(GraphNodeConfigResource)
var _ GraphNodeProvisionerConsumer = new(GraphNodeConfigResource)
}
func TestGraphNodeConfigResource_ProvidedBy(t *testing.T) {
n := &GraphNodeConfigResource{
Resource: &config.Resource{Type: "aws_instance"},
}
if v := n.ProvidedBy(); v[0] != "aws" {
t.Fatalf("bad: %#v", v)
}
}
func TestGraphNodeConfigResource_ProvidedBy_alias(t *testing.T) {
n := &GraphNodeConfigResource{
Resource: &config.Resource{Type: "aws_instance", Provider: "aws.bar"},
}
if v := n.ProvidedBy(); v[0] != "aws.bar" {
t.Fatalf("bad: %#v", v)
}
}
func TestGraphNodeConfigResource_ProvisionedBy(t *testing.T) {
n := &GraphNodeConfigResource{
Resource: &config.Resource{
Type: "aws_instance",
Provisioners: []*config.Provisioner{
&config.Provisioner{Type: "foo"},
&config.Provisioner{Type: "bar"},
},
},
}
expected := []string{"foo", "bar"}
actual := n.ProvisionedBy()
if !reflect.DeepEqual(actual, expected) {
t.Fatalf("bad: %#v", actual)
}
}

16
terraform/graph_config_node_type.go
View File

@ -1,16 +0,0 @@
package terraform
//go:generate stringer -type=GraphNodeConfigType graph_config_node_type.go
// GraphNodeConfigType is an enum for the type of thing that a graph
// node represents from the configuration.
type GraphNodeConfigType int
const (
GraphNodeConfigTypeInvalid GraphNodeConfigType = 0
GraphNodeConfigTypeResource GraphNodeConfigType = iota
GraphNodeConfigTypeProvider
GraphNodeConfigTypeModule
GraphNodeConfigTypeOutput
GraphNodeConfigTypeVariable
)

274
terraform/graph_config_node_variable.go
View File

@ -1,274 +0,0 @@
package terraform
import (
"fmt"
"log"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/config/module"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeConfigVariable represents a Variable in the config.
type GraphNodeConfigVariable struct {
Variable *config.Variable
// Value, if non-nil, will be used to set the value of the variable
// during evaluation. If this is nil, evaluation will do nothing.
//
// Module is the name of the module to set the variables on.
Module string
Value *config.RawConfig
ModuleTree *module.Tree
ModulePath []string
}
func (n *GraphNodeConfigVariable) Name() string {
return fmt.Sprintf("var.%s", n.Variable.Name)
}
func (n *GraphNodeConfigVariable) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeVariable
}
func (n *GraphNodeConfigVariable) DependableName() []string {
return []string{n.Name()}
}
// RemoveIfNotTargeted implements RemovableIfNotTargeted.
// When targeting is active, variables that are not targeted should be removed
// from the graph, because otherwise module variables trying to interpolate
// their references can fail when they're missing the referent resource node.
func (n *GraphNodeConfigVariable) RemoveIfNotTargeted() bool {
return true
}
func (n *GraphNodeConfigVariable) DependentOn() []string {
// If we don't have any value set, we don't depend on anything
if n.Value == nil {
return nil
}
// Get what we depend on based on our value
vars := n.Value.Variables
result := make([]string, 0, len(vars))
for _, v := range vars {
if vn := varNameForVar(v); vn != "" {
result = append(result, vn)
}
}
return result
}
func (n *GraphNodeConfigVariable) VariableName() string {
return n.Variable.Name
}
// GraphNodeDestroyEdgeInclude impl.
func (n *GraphNodeConfigVariable) DestroyEdgeInclude(v dag.Vertex) bool {
// Only include this variable in a destroy edge if the source vertex
// "v" has a count dependency on this variable.
log.Printf("[DEBUG] DestroyEdgeInclude: Checking: %s", dag.VertexName(v))
cv, ok := v.(GraphNodeCountDependent)
if !ok {
log.Printf("[DEBUG] DestroyEdgeInclude: Not GraphNodeCountDependent: %s", dag.VertexName(v))
return false
}
for _, d := range cv.CountDependentOn() {
for _, d2 := range n.DependableName() {
log.Printf("[DEBUG] DestroyEdgeInclude: d = %s : d2 = %s", d, d2)
if d == d2 {
return true
}
}
}
return false
}
// GraphNodeNoopPrunable
func (n *GraphNodeConfigVariable) Noop(opts *NoopOpts) bool {
log.Printf("[DEBUG] Checking variable noop: %s", n.Name())
// If we have no diff, always keep this in the graph. We have to do
// this primarily for validation: we want to validate that variable
// interpolations are valid even if there are no resources that
// depend on them.
if opts.Diff == nil || opts.Diff.Empty() {
log.Printf("[DEBUG] No diff, not a noop")
return false
}
// We have to find our our module diff since we do funky things with
// the flat node's implementation of Path() below.
modDiff := opts.Diff.ModuleByPath(n.ModulePath)
// If we're destroying, we have no need of variables unless they are depended
// on by the count of a resource.
if modDiff != nil && modDiff.Destroy {
if n.hasDestroyEdgeInPath(opts, nil) {
log.Printf("[DEBUG] Variable has destroy edge from %s, not a noop",
dag.VertexName(opts.Vertex))
return false
}
log.Printf("[DEBUG] Variable has no included destroy edges: noop!")
return true
}
for _, v := range opts.Graph.UpEdges(opts.Vertex).List() {
// This is terrible, but I can't think of a better way to do this.
if dag.VertexName(v) == rootNodeName {
continue
}
log.Printf("[DEBUG] Found up edge to %s, var is not noop", dag.VertexName(v))
return false
}
log.Printf("[DEBUG] No up edges, treating variable as a noop")
return true
}
// hasDestroyEdgeInPath recursively walks for a destroy edge, ensuring that
// a variable both has no immediate destroy edges or any in its full module
// path, ensuring that links do not get severed in the middle.
func (n *GraphNodeConfigVariable) hasDestroyEdgeInPath(opts *NoopOpts, vertex dag.Vertex) bool {
if vertex == nil {
vertex = opts.Vertex
}
log.Printf("[DEBUG] hasDestroyEdgeInPath: Looking for destroy edge: %s - %T", dag.VertexName(vertex), vertex)
for _, v := range opts.Graph.UpEdges(vertex).List() {
if len(opts.Graph.UpEdges(v).List()) > 1 {
if n.hasDestroyEdgeInPath(opts, v) == true {
return true
}
}
// Here we borrow the implementation of DestroyEdgeInclude, whose logic
// and semantics are exactly what we want here. We add a check for the
// the root node, since we have to always depend on its existance.
if cv, ok := vertex.(*GraphNodeConfigVariableFlat); ok {
if dag.VertexName(v) == rootNodeName || cv.DestroyEdgeInclude(v) {
return true
}
}
}
return false
}
// GraphNodeProxy impl.
func (n *GraphNodeConfigVariable) Proxy() bool {
return true
}
// GraphNodeEvalable impl.
func (n *GraphNodeConfigVariable) EvalTree() EvalNode {
// If we have no value, do nothing
if n.Value == nil {
return &EvalNoop{}
}
// Otherwise, interpolate the value of this variable and set it
// within the variables mapping.
var config *ResourceConfig
variables := make(map[string]interface{})
return &EvalSequence{
Nodes: []EvalNode{
&EvalInterpolate{
Config: n.Value,
Output: &config,
},
&EvalVariableBlock{
Config: &config,
VariableValues: variables,
},
&EvalCoerceMapVariable{
Variables: variables,
ModulePath: n.ModulePath,
ModuleTree: n.ModuleTree,
},
&EvalTypeCheckVariable{
Variables: variables,
ModulePath: n.ModulePath,
ModuleTree: n.ModuleTree,
},
&EvalSetVariables{
Module: &n.Module,
Variables: variables,
},
},
}
}
// GraphNodeFlattenable impl.
func (n *GraphNodeConfigVariable) Flatten(p []string) (dag.Vertex, error) {
return &GraphNodeConfigVariableFlat{
GraphNodeConfigVariable: n,
PathValue: p,
}, nil
}
type GraphNodeConfigVariableFlat struct {
*GraphNodeConfigVariable
PathValue []string
}
func (n *GraphNodeConfigVariableFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.GraphNodeConfigVariable.Name())
}
func (n *GraphNodeConfigVariableFlat) DependableName() []string {
return []string{n.Name()}
}
func (n *GraphNodeConfigVariableFlat) DependentOn() []string {
// We only wrap the dependencies and such if we have a path that is
// longer than 2 elements (root, child, more). This is because when
// flattened, variables can point outside the graph.
prefix := ""
if len(n.PathValue) > 2 {
prefix = modulePrefixStr(n.PathValue[:len(n.PathValue)-1])
}
return modulePrefixList(
n.GraphNodeConfigVariable.DependentOn(),
prefix)
}
func (n *GraphNodeConfigVariableFlat) Path() []string {
if len(n.PathValue) > 2 {
return n.PathValue[:len(n.PathValue)-1]
}
return nil
}
func (n *GraphNodeConfigVariableFlat) Noop(opts *NoopOpts) bool {
// First look for provider nodes that depend on this variable downstream
modDiff := opts.Diff.ModuleByPath(n.ModulePath)
if modDiff != nil && modDiff.Destroy {
ds, err := opts.Graph.Descendents(n)
if err != nil {
log.Printf("[ERROR] Error looking up descendents of %s: %s", n.Name(), err)
} else {
for _, d := range ds.List() {
if _, ok := d.(GraphNodeProvider); ok {
log.Printf("[DEBUG] This variable is depended on by a provider, can't be a noop.")
return false
}
}
}
}
// Then fall back to existing impl
return n.GraphNodeConfigVariable.Noop(opts)
}

21
terraform/graph_config_node_variable_test.go
View File

@ -1,21 +0,0 @@
package terraform
import (
"testing"
"github.com/hashicorp/terraform/dag"
)
func TestGraphNodeConfigVariable_impl(t *testing.T) {
var _ dag.Vertex = new(GraphNodeConfigVariable)
var _ dag.NamedVertex = new(GraphNodeConfigVariable)
var _ graphNodeConfig = new(GraphNodeConfigVariable)
var _ GraphNodeProxy = new(GraphNodeConfigVariable)
}
func TestGraphNodeConfigVariableFlat_impl(t *testing.T) {
var _ dag.Vertex = new(GraphNodeConfigVariableFlat)
var _ dag.NamedVertex = new(GraphNodeConfigVariableFlat)
var _ graphNodeConfig = new(GraphNodeConfigVariableFlat)
var _ GraphNodeProxy = new(GraphNodeConfigVariableFlat)
}

16
terraform/graphnodeconfigtype_string.go
View File

@ -1,16 +0,0 @@
// Code generated by "stringer -type=GraphNodeConfigType graph_config_node_type.go"; DO NOT EDIT
package terraform
import "fmt"
const _GraphNodeConfigType_name = "GraphNodeConfigTypeInvalidGraphNodeConfigTypeResourceGraphNodeConfigTypeProviderGraphNodeConfigTypeModuleGraphNodeConfigTypeOutputGraphNodeConfigTypeVariable"
var _GraphNodeConfigType_index = [...]uint8{0, 26, 53, 80, 105, 130, 157}
func (i GraphNodeConfigType) String() string {
if i < 0 || i >= GraphNodeConfigType(len(_GraphNodeConfigType_index)-1) {
return fmt.Sprintf("GraphNodeConfigType(%d)", i)
}
return _GraphNodeConfigType_name[_GraphNodeConfigType_index[i]:_GraphNodeConfigType_index[i+1]]
}

13
terraform/node_data_refresh.go
View File

@ -92,21 +92,10 @@ func (n *NodeRefreshableDataResourceInstance) EvalTree() EvalNode {
// If the config isn't empty we update the state
if n.Config != nil {
// Determine the dependencies for the state. We use some older
// code for this that we've used for a long time.
var stateDeps []string
{
oldN := &graphNodeExpandedResource{
Resource: n.Config,
Index: addr.Index,
}
stateDeps = oldN.StateDependencies()
}
rs = &ResourceState{
Type: n.Config.Type,
Provider: n.Config.Provider,
Dependencies: stateDeps,
Dependencies: n.StateReferences(),
}
}

44
terraform/node_provisioner.go Normal file
View File

@ -0,0 +1,44 @@
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/config"
)
// NodeProvisioner represents a provider that has no associated operations.
// It registers all the common interfaces across operations for providers.
type NodeProvisioner struct {
NameValue string
PathValue []string
// The fields below will be automatically set using the Attach
// interfaces if you're running those transforms, but also be explicitly
// set if you already have that information.
Config *config.ProviderConfig
}
func (n *NodeProvisioner) Name() string {
result := fmt.Sprintf("provisioner.%s", n.NameValue)
if len(n.PathValue) > 1 {
result = fmt.Sprintf("%s.%s", modulePrefixStr(n.PathValue), result)
}
return result
}
// GraphNodeSubPath
func (n *NodeProvisioner) Path() []string {
return n.PathValue
}
// GraphNodeProvisioner
func (n *NodeProvisioner) ProvisionerName() string {
return n.NameValue
}
// GraphNodeEvalable impl.
func (n *NodeProvisioner) EvalTree() EvalNode {
return &EvalInitProvisioner{Name: n.NameValue}
}

58
terraform/node_resource_abstract.go
View File

@ -2,6 +2,7 @@ package terraform
import (
"fmt"
"strings"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
@ -109,6 +110,63 @@ func (n *NodeAbstractResource) References() []string {
return nil
}
// StateReferences returns the dependencies to put into the state for
// this resource.
func (n *NodeAbstractResource) StateReferences() []string {
self := n.ReferenceableName()
// Determine what our "prefix" is for checking for references to
// ourself.
addrCopy := n.Addr.Copy()
addrCopy.Index = -1
selfPrefix := addrCopy.String() + "."
depsRaw := n.References()
deps := make([]string, 0, len(depsRaw))
for _, d := range depsRaw {
// Ignore any variable dependencies
if strings.HasPrefix(d, "var.") {
continue
}
// If this has a backup ref, ignore those for now. The old state
// file never contained those and I'd rather store the rich types we
// add in the future.
if idx := strings.IndexRune(d, '/'); idx != -1 {
d = d[:idx]
}
// If we're referencing ourself, then ignore it
found := false
for _, s := range self {
if d == s {
found = true
}
}
if found {
continue
}
// If this is a reference to ourself and a specific index, we keep
// it. For example, if this resource is "foo.bar" and the reference
// is "foo.bar.0" then we keep it exact. Otherwise, we strip it.
if strings.HasSuffix(d, ".0") && !strings.HasPrefix(d, selfPrefix) {
d = d[:len(d)-2]
}
// This is sad. The dependencies are currently in the format of
// "module.foo.bar" (the full field). This strips the field off.
if strings.HasPrefix(d, "module.") {
parts := strings.SplitN(d, ".", 3)
d = strings.Join(parts[0:2], ".")
}
deps = append(deps, d)
}
return deps
}
// GraphNodeProviderConsumer
func (n *NodeAbstractResource) ProvidedBy() []string {
// If we have a config we prefer that above all else

12
terraform/node_resource_apply.go
View File

@ -70,16 +70,8 @@ func (n *NodeApplyableResource) EvalTree() EvalNode {
resource.CountIndex = 0
}
// Determine the dependencies for the state. We use some older
// code for this that we've used for a long time.
var stateDeps []string
{
oldN := &graphNodeExpandedResource{
Resource: n.Config,
Index: addr.Index,
}
stateDeps = oldN.StateDependencies()
}
// Determine the dependencies for the state.
stateDeps := n.StateReferences()
// Eval info is different depending on what kind of resource this is
switch n.Config.Mode {

9
terraform/node_resource_plan_instance.go
View File

@ -37,13 +37,8 @@ func (n *NodePlannableResourceInstance) EvalTree() EvalNode {
resource.CountIndex = 0
}
// Determine the dependencies for the state. We use some older
// code for this that we've used for a long time.
var stateDeps []string
{
oldN := &graphNodeExpandedResource{Resource: n.Config}
stateDeps = oldN.StateDependencies()
}
// Determine the dependencies for the state.
stateDeps := n.StateReferences()
// Eval info is different depending on what kind of resource this is
switch n.Config.Mode {

19
terraform/semantics.go
View File

@ -49,25 +49,6 @@ type SemanticChecker interface {
Check(*dag.Graph, dag.Vertex) error
}
// SemanticCheckModulesExist is an implementation of SemanticChecker that
// verifies that all the modules that are referenced in the graph exist.
type SemanticCheckModulesExist struct{}
// TODO: test
func (*SemanticCheckModulesExist) Check(g *dag.Graph, v dag.Vertex) error {
mn, ok := v.(*GraphNodeConfigModule)
if !ok {
return nil
}
if mn.Tree == nil {
return fmt.Errorf(
"module '%s' not found", mn.Module.Name)
}
return nil
}
// smcUserVariables does all the semantic checks to verify that the
// variables given satisfy the configuration itself.
func smcUserVariables(c *config.Config, vs map[string]interface{}) []error {

100
terraform/transform_config_old.go
View File

@ -1,111 +1,11 @@
package terraform
import (
"errors"
"fmt"
"github.com/hashicorp/go-multierror"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/config/module"
)
// ConfigTransformerOld is a GraphTransformer that adds the configuration
// to the graph. The module used to configure this transformer must be
// the root module. We'll look up the child module by the Path in the
// Graph.
type ConfigTransformerOld struct {
Module *module.Tree
}
func (t *ConfigTransformerOld) Transform(g *Graph) error {
// A module is required and also must be completely loaded.
if t.Module == nil {
return errors.New("module must not be nil")
}
if !t.Module.Loaded() {
return errors.New("module must be loaded")
}
// Get the module we care about
module := t.Module.Child(g.Path[1:])
if module == nil {
return nil
}
// Get the configuration for this module
config := module.Config()
// Create the node list we'll use for the graph
nodes := make([]graphNodeConfig, 0,
(len(config.Variables)+
len(config.ProviderConfigs)+
len(config.Modules)+
len(config.Resources)+
len(config.Outputs))*2)
// Write all the variables out
for _, v := range config.Variables {
nodes = append(nodes, &GraphNodeConfigVariable{
Variable: v,
ModuleTree: t.Module,
ModulePath: g.Path,
})
}
// Write all the provider configs out
for _, pc := range config.ProviderConfigs {
nodes = append(nodes, &GraphNodeConfigProvider{Provider: pc})
}
// Write all the resources out
for _, r := range config.Resources {
nodes = append(nodes, &GraphNodeConfigResource{
Resource: r,
Path: g.Path,
})
}
// Write all the modules out
children := module.Children()
for _, m := range config.Modules {
path := make([]string, len(g.Path), len(g.Path)+1)
copy(path, g.Path)
path = append(path, m.Name)
nodes = append(nodes, &GraphNodeConfigModule{
Path: path,
Module: m,
Tree: children[m.Name],
})
}
// Write all the outputs out
for _, o := range config.Outputs {
nodes = append(nodes, &GraphNodeConfigOutput{Output: o})
}
// Err is where the final error value will go if there is one
var err error
// Build the graph vertices
for _, n := range nodes {
g.Add(n)
}
// Build up the dependencies. We have to do this outside of the above
// loop since the nodes need to be in place for us to build the deps.
for _, n := range nodes {
if missing := g.ConnectDependent(n); len(missing) > 0 {
for _, m := range missing {
err = multierror.Append(err, fmt.Errorf(
"%s: missing dependency: %s", n.Name(), m))
}
}
}
return err
}
// varNameForVar returns the VarName value for an interpolated variable.
// This value is compared to the VarName() value for the nodes within the
// graph to build the graph edges.

150
terraform/transform_config_old_test.go
View File

@ -1,150 +0,0 @@
package terraform
import (
"path/filepath"
"strings"
"testing"
"github.com/hashicorp/terraform/config/module"
)
func TestConfigTransformerOld_nilModule(t *testing.T) {
g := Graph{Path: RootModulePath}
tf := &ConfigTransformerOld{}
if err := tf.Transform(&g); err == nil {
t.Fatal("should error")
}
}
func TestConfigTransformerOld_unloadedModule(t *testing.T) {
mod, err := module.NewTreeModule(
"", filepath.Join(fixtureDir, "graph-basic"))
if err != nil {
t.Fatalf("err: %s", err)
}
g := Graph{Path: RootModulePath}
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err == nil {
t.Fatal("should error")
}
}
func TestConfigTransformerOld(t *testing.T) {
g := Graph{Path: RootModulePath}
tf := &ConfigTransformerOld{Module: testModule(t, "graph-basic")}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testGraphBasicStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestConfigTransformerOld_dependsOn(t *testing.T) {
g := Graph{Path: RootModulePath}
tf := &ConfigTransformerOld{Module: testModule(t, "graph-depends-on")}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testGraphDependsOnStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestConfigTransformerOld_modules(t *testing.T) {
g := Graph{Path: RootModulePath}
tf := &ConfigTransformerOld{Module: testModule(t, "graph-modules")}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testGraphModulesStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestConfigTransformerOld_outputs(t *testing.T) {
g := Graph{Path: RootModulePath}
tf := &ConfigTransformerOld{Module: testModule(t, "graph-outputs")}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testGraphOutputsStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestConfigTransformerOld_providerAlias(t *testing.T) {
g := Graph{Path: RootModulePath}
tf := &ConfigTransformerOld{Module: testModule(t, "graph-provider-alias")}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testGraphProviderAliasStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestConfigTransformerOld_errMissingDeps(t *testing.T) {
g := Graph{Path: RootModulePath}
tf := &ConfigTransformerOld{Module: testModule(t, "graph-missing-deps")}
if err := tf.Transform(&g); err == nil {
t.Fatalf("err: %s", err)
}
}
const testGraphBasicStr = `
aws_instance.web
aws_security_group.firewall
var.foo
aws_load_balancer.weblb
aws_instance.web
aws_security_group.firewall
openstack_floating_ip.random
provider.aws
openstack_floating_ip.random
var.foo
`
const testGraphDependsOnStr = `
aws_instance.db
aws_instance.web
aws_instance.web
`
const testGraphModulesStr = `
aws_instance.web
aws_security_group.firewall
module.consul
aws_security_group.firewall
module.consul
aws_security_group.firewall
provider.aws
`
const testGraphOutputsStr = `
aws_instance.foo
output.foo
aws_instance.foo
`
const testGraphProviderAliasStr = `
provider.aws
provider.aws.bar
provider.aws.foo
`

284
terraform/transform_destroy.go
View File

@ -1,284 +0,0 @@
package terraform
import (
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeDestroyable is the interface that nodes that can be destroyed
// must implement. This is used to automatically handle the creation of
// destroy nodes in the graph and the dependency ordering of those destroys.
type GraphNodeDestroyable interface {
// DestroyNode returns the node used for the destroy with the given
// mode. If this returns nil, then a destroy node for that mode
// will not be added.
DestroyNode() GraphNodeDestroy
}
// GraphNodeDestroy is the interface that must implemented by
// nodes that destroy.
type GraphNodeDestroy interface {
dag.Vertex
// CreateBeforeDestroy is called to check whether this node
// should be created before it is destroyed. The CreateBeforeDestroy
// transformer uses this information to setup the graph.
CreateBeforeDestroy() bool
// CreateNode returns the node used for the create side of this
// destroy. This must already exist within the graph.
CreateNode() dag.Vertex
}
// GraphNodeDestroyPrunable is the interface that can be implemented to
// signal that this node can be pruned depending on state.
type GraphNodeDestroyPrunable interface {
// DestroyInclude is called to check if this node should be included
// with the given state. The state and diff must NOT be modified.
DestroyInclude(*ModuleDiff, *ModuleState) bool
}
// GraphNodeEdgeInclude can be implemented to not include something
// as an edge within the destroy graph. This is usually done because it
// might cause unnecessary cycles.
type GraphNodeDestroyEdgeInclude interface {
DestroyEdgeInclude(dag.Vertex) bool
}
// DestroyTransformer is a GraphTransformer that creates the destruction
// nodes for things that _might_ be destroyed.
type DestroyTransformer struct {
FullDestroy bool
}
func (t *DestroyTransformer) Transform(g *Graph) error {
var connect, remove []dag.Edge
nodeToCn := make(map[dag.Vertex]dag.Vertex, len(g.Vertices()))
nodeToDn := make(map[dag.Vertex]dag.Vertex, len(g.Vertices()))
for _, v := range g.Vertices() {
// If it is not a destroyable, we don't care
cn, ok := v.(GraphNodeDestroyable)
if !ok {
continue
}
// Grab the destroy side of the node and connect it through
n := cn.DestroyNode()
if n == nil {
continue
}
// Store it
nodeToCn[n] = cn
nodeToDn[cn] = n
// If the creation node is equal to the destroy node, then
// don't do any of the edge jump rope below.
if n.(interface{}) == cn.(interface{}) {
continue
}
// Add it to the graph
g.Add(n)
// Inherit all the edges from the old node
downEdges := g.DownEdges(v).List()
for _, edgeRaw := range downEdges {
// If this thing specifically requests to not be depended on
// by destroy nodes, then don't.
if i, ok := edgeRaw.(GraphNodeDestroyEdgeInclude); ok &&
!i.DestroyEdgeInclude(v) {
continue
}
g.Connect(dag.BasicEdge(n, edgeRaw.(dag.Vertex)))
}
// Add a new edge to connect the node to be created to
// the destroy node.
connect = append(connect, dag.BasicEdge(v, n))
}
// Go through the nodes we added and determine if they depend
// on any nodes with a destroy node. If so, depend on that instead.
for n, _ := range nodeToCn {
for _, downRaw := range g.DownEdges(n).List() {
target := downRaw.(dag.Vertex)
cn2, ok := target.(GraphNodeDestroyable)
if !ok {
continue
}
newTarget := nodeToDn[cn2]
if newTarget == nil {
continue
}
// Make the new edge and transpose
connect = append(connect, dag.BasicEdge(newTarget, n))
// Remove the old edge
remove = append(remove, dag.BasicEdge(n, target))
}
}
// Atomatically add/remove the edges
for _, e := range connect {
g.Connect(e)
}
for _, e := range remove {
g.RemoveEdge(e)
}
return nil
}
// CreateBeforeDestroyTransformer is a GraphTransformer that modifies
// the destroys of some nodes so that the creation happens before the
// destroy.
type CreateBeforeDestroyTransformer struct{}
func (t *CreateBeforeDestroyTransformer) Transform(g *Graph) error {
// We "stage" the edge connections/destroys in these slices so that
// while we're doing the edge transformations (transpositions) in
// the graph, we're not affecting future edge transpositions. These
// slices let us stage ALL the changes that WILL happen so that all
// of the transformations happen atomically.
var connect, destroy []dag.Edge
for _, v := range g.Vertices() {
// We only care to use the destroy nodes
dn, ok := v.(GraphNodeDestroy)
if !ok {
continue
}
// If the node doesn't need to create before destroy, then continue
if !dn.CreateBeforeDestroy() {
if noCreateBeforeDestroyAncestors(g, dn) {
continue
}
// PURPOSELY HACKY FIX SINCE THIS TRANSFORM IS DEPRECATED.
// This is a hacky way to fix GH-10439. For a detailed description
// of the fix, see CBDEdgeTransformer, which is the equivalent
// transform used by the new graphs.
//
// This transform is deprecated because it is only used by the
// old graphs which are going to be removed.
var update *config.Resource
if dn, ok := v.(*graphNodeResourceDestroy); ok {
update = dn.Original.Resource
}
if dn, ok := v.(*graphNodeResourceDestroyFlat); ok {
update = dn.Original.Resource
}
if update != nil {
update.Lifecycle.CreateBeforeDestroy = true
}
}
// Get the creation side of this node
cn := dn.CreateNode()
// Take all the things which depend on the creation node and
// make them dependencies on the destruction. Clarifying this
// with an example: if you have a web server and a load balancer
// and the load balancer depends on the web server, then when we
// do a create before destroy, we want to make sure the steps are:
//
// 1.) Create new web server
// 2.) Update load balancer
// 3.) Delete old web server
//
// This ensures that.
for _, sourceRaw := range g.UpEdges(cn).List() {
source := sourceRaw.(dag.Vertex)
// If the graph has a "root" node (one added by a RootTransformer and not
// just a resource that happens to have no ancestors), we don't want to
// add any edges to it, because then it ceases to be a root.
if _, ok := source.(graphNodeRoot); ok {
continue
}
connect = append(connect, dag.BasicEdge(dn, source))
}
// Swap the edge so that the destroy depends on the creation
// happening...
connect = append(connect, dag.BasicEdge(dn, cn))
destroy = append(destroy, dag.BasicEdge(cn, dn))
}
for _, edge := range connect {
g.Connect(edge)
}
for _, edge := range destroy {
g.RemoveEdge(edge)
}
return nil
}
// noCreateBeforeDestroyAncestors verifies that a vertex has no ancestors that
// are CreateBeforeDestroy.
// If this vertex has an ancestor with CreateBeforeDestroy, we will need to
// inherit that behavior and re-order the edges even if this node type doesn't
// directly implement CreateBeforeDestroy.
func noCreateBeforeDestroyAncestors(g *Graph, v dag.Vertex) bool {
s, _ := g.Ancestors(v)
if s == nil {
return true
}
for _, v := range s.List() {
dn, ok := v.(GraphNodeDestroy)
if !ok {
continue
}
if dn.CreateBeforeDestroy() {
// some ancestor is CreateBeforeDestroy, so we need to follow suit
return false
}
}
return true
}
// PruneDestroyTransformer is a GraphTransformer that removes the destroy
// nodes that aren't in the diff.
type PruneDestroyTransformer struct {
Diff *Diff
State *State
}
func (t *PruneDestroyTransformer) Transform(g *Graph) error {
for _, v := range g.Vertices() {
// If it is not a destroyer, we don't care
dn, ok := v.(GraphNodeDestroyPrunable)
if !ok {
continue
}
path := g.Path
if pn, ok := v.(GraphNodeSubPath); ok {
path = pn.Path()
}
var modDiff *ModuleDiff
var modState *ModuleState
if t.Diff != nil {
modDiff = t.Diff.ModuleByPath(path)
}
if t.State != nil {
modState = t.State.ModuleByPath(path)
}
// Remove it if we should
if !dn.DestroyInclude(modDiff, modState) {
g.Remove(v)
}
}
return nil
}

506
terraform/transform_destroy_test.go
View File

@ -1,506 +0,0 @@
package terraform
import (
"strings"
"testing"
)
func TestDestroyTransformer(t *testing.T) {
mod := testModule(t, "transform-destroy-basic")
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformDestroyBasicStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestDestroyTransformer_dependsOn(t *testing.T) {
mod := testModule(t, "transform-destroy-depends-on")
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformDestroyBasicStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestCreateBeforeDestroyTransformer(t *testing.T) {
mod := testModule(t, "transform-create-before-destroy-basic")
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &CreateBeforeDestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformCreateBeforeDestroyBasicStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestCreateBeforeDestroyTransformer_twice(t *testing.T) {
mod := testModule(t, "transform-create-before-destroy-twice")
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &CreateBeforeDestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformCreateBeforeDestroyTwiceStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestPruneDestroyTransformer(t *testing.T) {
var diff *Diff
mod := testModule(t, "transform-destroy-basic")
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &PruneDestroyTransformer{Diff: diff}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformPruneDestroyBasicStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestPruneDestroyTransformer_diff(t *testing.T) {
mod := testModule(t, "transform-destroy-basic")
diff := &Diff{
Modules: []*ModuleDiff{
&ModuleDiff{
Path: RootModulePath,
Resources: map[string]*InstanceDiff{
"aws_instance.bar": &InstanceDiff{},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &PruneDestroyTransformer{Diff: diff}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformPruneDestroyBasicDiffStr)
if actual != expected {
t.Fatalf("expected:\n\n%s\n\nbad:\n\n%s", expected, actual)
}
}
func TestPruneDestroyTransformer_count(t *testing.T) {
mod := testModule(t, "transform-destroy-prune-count")
diff := &Diff{}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &PruneDestroyTransformer{Diff: diff}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformPruneDestroyCountStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestPruneDestroyTransformer_countDec(t *testing.T) {
mod := testModule(t, "transform-destroy-basic")
diff := &Diff{}
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.bar.1": &ResourceState{
Primary: &InstanceState{},
},
"aws_instance.bar.2": &ResourceState{
Primary: &InstanceState{},
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &PruneDestroyTransformer{Diff: diff, State: state}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformPruneDestroyCountDecStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestPruneDestroyTransformer_countState(t *testing.T) {
mod := testModule(t, "transform-destroy-basic")
diff := &Diff{}
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.bar": &ResourceState{
Primary: &InstanceState{},
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &PruneDestroyTransformer{Diff: diff, State: state}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformPruneDestroyCountStateStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestPruneDestroyTransformer_prefixMatch(t *testing.T) {
mod := testModule(t, "transform-destroy-prefix")
diff := &Diff{}
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.foo-bar.0": &ResourceState{
Primary: &InstanceState{ID: "foo"},
},
"aws_instance.foo-bar.1": &ResourceState{
Primary: &InstanceState{ID: "foo"},
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &PruneDestroyTransformer{Diff: diff, State: state}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformPruneDestroyPrefixStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestPruneDestroyTransformer_tainted(t *testing.T) {
mod := testModule(t, "transform-destroy-basic")
diff := &Diff{}
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.bar": &ResourceState{
Primary: &InstanceState{
ID: "foo",
Tainted: true,
},
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &DestroyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
tf := &PruneDestroyTransformer{Diff: diff, State: state}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformPruneDestroyTaintedStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
const testTransformDestroyBasicStr = `
aws_instance.bar
aws_instance.bar (destroy)
aws_instance.foo
aws_instance.bar (destroy)
aws_instance.foo
aws_instance.foo (destroy)
aws_instance.foo (destroy)
aws_instance.bar (destroy)
`
const testTransformPruneDestroyBasicStr = `
aws_instance.bar
aws_instance.foo
aws_instance.foo
`
const testTransformPruneDestroyBasicDiffStr = `
aws_instance.bar
aws_instance.foo
aws_instance.foo
`
const testTransformPruneDestroyCountStr = `
aws_instance.bar
aws_instance.bar (destroy)
aws_instance.foo
aws_instance.bar (destroy)
aws_instance.foo
`
const testTransformPruneDestroyCountDecStr = `
aws_instance.bar
aws_instance.bar (destroy)
aws_instance.foo
aws_instance.bar (destroy)
aws_instance.foo
`
const testTransformPruneDestroyCountStateStr = `
aws_instance.bar
aws_instance.foo
aws_instance.foo
`
const testTransformPruneDestroyPrefixStr = `
aws_instance.foo
aws_instance.foo-bar
aws_instance.foo-bar (destroy)
aws_instance.foo-bar (destroy)
`
const testTransformPruneDestroyTaintedStr = `
aws_instance.bar
aws_instance.foo
aws_instance.foo
`
const testTransformCreateBeforeDestroyBasicStr = `
aws_instance.web
aws_instance.web (destroy)
aws_instance.web
aws_load_balancer.lb
aws_load_balancer.lb (destroy)
aws_load_balancer.lb
aws_instance.web
aws_load_balancer.lb (destroy)
aws_load_balancer.lb (destroy)
`
const testTransformCreateBeforeDestroyTwiceStr = `
aws_autoscale.bar
aws_lc.foo
aws_autoscale.bar (destroy)
aws_autoscale.bar
aws_lc.foo
aws_lc.foo (destroy)
aws_autoscale.bar
aws_autoscale.bar (destroy)
aws_lc.foo
`

17
terraform/transform_expand.go
View File

@ -46,20 +46,3 @@ func (t *ExpandTransform) Transform(v dag.Vertex) (dag.Vertex, error) {
log.Printf("[DEBUG] vertex %q: static expanding", dag.VertexName(ev))
return ev.Expand(t.Builder)
}
type GraphNodeBasicSubgraph struct {
NameValue string
Graph *Graph
}
func (n *GraphNodeBasicSubgraph) Name() string {
return n.NameValue
}
func (n *GraphNodeBasicSubgraph) Subgraph() dag.Grapher {
return n.Graph
}
func (n *GraphNodeBasicSubgraph) FlattenGraph() *Graph {
return n.Graph
}

107
terraform/transform_flatten.go
View File

@ -1,107 +0,0 @@
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeFlatGraph must be implemented by nodes that have subgraphs
// that they want flattened into the graph.
type GraphNodeFlatGraph interface {
FlattenGraph() *Graph
}
// GraphNodeFlattenable must be implemented by all nodes that can be
// flattened. If a FlattenGraph returns any nodes that can't be flattened,
// it will be an error.
//
// If Flatten returns nil for the Vertex along with a nil error, it will
// removed from the graph.
type GraphNodeFlattenable interface {
Flatten(path []string) (dag.Vertex, error)
}
// FlattenTransformer is a transformer that goes through the graph, finds
// subgraphs that can be flattened, and flattens them into this graph,
// removing the prior subgraph node.
type FlattenTransformer struct{}
func (t *FlattenTransformer) Transform(g *Graph) error {
for _, v := range g.Vertices() {
fn, ok := v.(GraphNodeFlatGraph)
if !ok {
continue
}
// If we don't want to be flattened, don't do it
subgraph := fn.FlattenGraph()
if subgraph == nil {
continue
}
// Get all the things that depend on this node. We'll re-connect
// dependents later. We have to copy these here since the UpEdges
// value will be deleted after the Remove below.
dependents := make([]dag.Vertex, 0, 5)
for _, v := range g.UpEdges(v).List() {
dependents = append(dependents, v)
}
// Remove the old node
g.Remove(v)
// Go through the subgraph and flatten all the nodes
for _, sv := range subgraph.Vertices() {
// If the vertex already has a subpath then we assume it has
// already been flattened. Ignore it.
if _, ok := sv.(GraphNodeSubPath); ok {
continue
}
fn, ok := sv.(GraphNodeFlattenable)
if !ok {
return fmt.Errorf(
"unflattenable node: %s %T",
dag.VertexName(sv), sv)
}
v, err := fn.Flatten(subgraph.Path)
if err != nil {
return fmt.Errorf(
"error flattening %s (%T): %s",
dag.VertexName(sv), sv, err)
}
if v == nil {
subgraph.Remove(v)
} else {
subgraph.Replace(sv, v)
}
}
// Now that we've handled any changes to the graph that are
// needed, we can add them all to our graph along with their edges.
for _, sv := range subgraph.Vertices() {
g.Add(sv)
}
for _, se := range subgraph.Edges() {
g.Connect(se)
}
// Connect the dependencies for all the new nodes that we added.
// This will properly connect variables to their sources, for example.
for _, sv := range subgraph.Vertices() {
g.ConnectDependent(sv)
}
// Re-connect all the things that dependent on the graph
// we just flattened. This should connect them back into the
// correct nodes if their DependentOn() is setup correctly.
for _, v := range dependents {
g.ConnectDependent(v)
}
}
return nil
}

95
terraform/transform_flatten_test.go
View File

@ -1,95 +0,0 @@
package terraform
import (
"strings"
"testing"
)
func TestFlattenTransformer(t *testing.T) {
mod := testModule(t, "transform-flatten")
var b BasicGraphBuilder
b = BasicGraphBuilder{
Steps: []GraphTransformer{
&ConfigTransformerOld{Module: mod},
&VertexTransformer{
Transforms: []GraphVertexTransformer{
&ExpandTransform{
Builder: &b,
},
},
},
&FlattenTransformer{},
},
}
g, err := b.Build(rootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformFlattenStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestFlattenTransformer_withProxy(t *testing.T) {
mod := testModule(t, "transform-flatten")
var b BasicGraphBuilder
b = BasicGraphBuilder{
Steps: []GraphTransformer{
&ConfigTransformerOld{Module: mod},
&VertexTransformer{
Transforms: []GraphVertexTransformer{
&ExpandTransform{
Builder: &b,
},
},
},
&FlattenTransformer{},
&ProxyTransformer{},
},
}
g, err := b.Build(rootModulePath)
if err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformFlattenProxyStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
const testTransformFlattenStr = `
aws_instance.parent
aws_instance.parent-output
module.child.output.output
module.child.aws_instance.child
module.child.var.var
module.child.output.output
module.child.aws_instance.child
module.child.plan-destroy
module.child.var.var
aws_instance.parent
`
const testTransformFlattenProxyStr = `
aws_instance.parent
aws_instance.parent-output
module.child.aws_instance.child
module.child.output.output
module.child.aws_instance.child
aws_instance.parent
module.child.var.var
module.child.output.output
module.child.aws_instance.child
module.child.plan-destroy
module.child.var.var
aws_instance.parent
`

62
terraform/transform_module_destroy_old.go
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@ -1,62 +0,0 @@
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/dag"
)
// ModuleDestroyTransformer is a GraphTransformer that adds a node
// to the graph that will just mark the full module for destroy in
// the destroy scenario.
type ModuleDestroyTransformerOld struct{}
func (t *ModuleDestroyTransformerOld) Transform(g *Graph) error {
// Create the node
n := &graphNodeModuleDestroy{Path: g.Path}
// Add it to the graph. We don't need any edges because
// it can happen whenever.
g.Add(n)
return nil
}
type graphNodeModuleDestroy struct {
Path []string
}
func (n *graphNodeModuleDestroy) Name() string {
return "plan-destroy"
}
// GraphNodeEvalable impl.
func (n *graphNodeModuleDestroy) EvalTree() EvalNode {
return &EvalOpFilter{
Ops: []walkOperation{walkPlanDestroy},
Node: &EvalDiffDestroyModule{Path: n.Path},
}
}
// GraphNodeFlattenable impl.
func (n *graphNodeModuleDestroy) Flatten(p []string) (dag.Vertex, error) {
return &graphNodeModuleDestroyFlat{
graphNodeModuleDestroy: n,
PathValue: p,
}, nil
}
type graphNodeModuleDestroyFlat struct {
*graphNodeModuleDestroy
PathValue []string
}
func (n *graphNodeModuleDestroyFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeModuleDestroy.Name())
}
func (n *graphNodeModuleDestroyFlat) Path() []string {
return n.PathValue
}

104
terraform/transform_noop.go
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@ -1,104 +0,0 @@
package terraform
import (
"github.com/hashicorp/terraform/dag"
)
// GraphNodeNoopPrunable can be implemented by nodes that can be
// pruned if they are noops.
type GraphNodeNoopPrunable interface {
Noop(*NoopOpts) bool
}
// NoopOpts are the options available to determine if your node is a noop.
type NoopOpts struct {
Graph *Graph
Vertex dag.Vertex
Diff *Diff
State *State
ModDiff *ModuleDiff
ModState *ModuleState
}
// PruneNoopTransformer is a graph transform that prunes nodes that
// consider themselves no-ops. This is done to both simplify the graph
// as well as to remove graph nodes that might otherwise cause problems
// during the graph run. Therefore, this transformer isn't completely
// an optimization step, and can instead be considered critical to
// Terraform operations.
//
// Example of the above case: variables for modules interpolate their values.
// Interpolation will fail on destruction (since attributes are being deleted),
// but variables shouldn't even eval if there is nothing that will consume
// the variable. Therefore, variables can note that they can be omitted
// safely in this case.
//
// The PruneNoopTransformer will prune nodes depth first, and will automatically
// create connect through the dependencies of pruned nodes. For example,
// if we have a graph A => B => C (A depends on B, etc.), and B decides to
// be removed, we'll still be left with A => C; the edge will be properly
// connected.
type PruneNoopTransformer struct {
Diff *Diff
State *State
}
func (t *PruneNoopTransformer) Transform(g *Graph) error {
// Find the leaves.
leaves := make([]dag.Vertex, 0, 10)
for _, v := range g.Vertices() {
if g.DownEdges(v).Len() == 0 {
leaves = append(leaves, v)
}
}
// Do a depth first walk from the leaves and remove things.
return g.ReverseDepthFirstWalk(leaves, func(v dag.Vertex, depth int) error {
// We need a prunable
pn, ok := v.(GraphNodeNoopPrunable)
if !ok {
return nil
}
// Start building the noop opts
path := g.Path
if pn, ok := v.(GraphNodeSubPath); ok {
path = pn.Path()
}
var modDiff *ModuleDiff
var modState *ModuleState
if t.Diff != nil {
modDiff = t.Diff.ModuleByPath(path)
}
if t.State != nil {
modState = t.State.ModuleByPath(path)
}
// Determine if its a noop. If it isn't, just return
noop := pn.Noop(&NoopOpts{
Graph: g,
Vertex: v,
Diff: t.Diff,
State: t.State,
ModDiff: modDiff,
ModState: modState,
})
if !noop {
return nil
}
// It is a noop! We first preserve edges.
up := g.UpEdges(v).List()
for _, downV := range g.DownEdges(v).List() {
for _, upV := range up {
g.Connect(dag.BasicEdge(upV, downV))
}
}
// Then remove it
g.Remove(v)
return nil
})
}

54
terraform/transform_noop_test.go
View File

@ -1,54 +0,0 @@
package terraform
import (
"strings"
"testing"
"github.com/hashicorp/terraform/dag"
)
func TestPruneNoopTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
a := &testGraphNodeNoop{NameValue: "A"}
b := &testGraphNodeNoop{NameValue: "B", Value: true}
c := &testGraphNodeNoop{NameValue: "C"}
g.Add(a)
g.Add(b)
g.Add(c)
g.Connect(dag.BasicEdge(a, b))
g.Connect(dag.BasicEdge(b, c))
{
tf := &PruneNoopTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformPruneNoopStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
const testTransformPruneNoopStr = `
A
C
C
`
type testGraphNodeNoop struct {
NameValue string
Value bool
}
func (v *testGraphNodeNoop) Name() string {
return v.NameValue
}
func (v *testGraphNodeNoop) Noop(*NoopOpts) bool {
return v.Value
}

437
terraform/transform_orphan.go
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@ -1,437 +0,0 @@
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/config/module"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeStateRepresentative is an interface that can be implemented by
// a node to say that it is representing a resource in the state.
type GraphNodeStateRepresentative interface {
StateId() []string
}
// OrphanTransformer is a GraphTransformer that adds orphans to the
// graph. This transformer adds both resource and module orphans.
type OrphanTransformer struct {
// Resource is resource configuration. This is only non-nil when
// expanding a resource that is in the configuration. It can't be
// dependend on.
Resource *config.Resource
// State is the global state. We require the global state to
// properly find module orphans at our path.
State *State
// Module is the root module. We'll look up the proper configuration
// using the graph path.
Module *module.Tree
// View, if non-nil will set a view on the module state.
View string
}
func (t *OrphanTransformer) Transform(g *Graph) error {
if t.State == nil {
// If the entire state is nil, there can't be any orphans
return nil
}
// Build up all our state representatives
resourceRep := make(map[string]struct{})
for _, v := range g.Vertices() {
if sr, ok := v.(GraphNodeStateRepresentative); ok {
for _, k := range sr.StateId() {
resourceRep[k] = struct{}{}
}
}
}
var config *config.Config
if t.Module != nil {
if module := t.Module.Child(g.Path[1:]); module != nil {
config = module.Config()
}
}
var resourceVertexes []dag.Vertex
if state := t.State.ModuleByPath(g.Path); state != nil {
// If we have state, then we can have orphan resources
// If we have a view, get the view
if t.View != "" {
state = state.View(t.View)
}
resourceOrphans := state.Orphans(config)
resourceVertexes = make([]dag.Vertex, len(resourceOrphans))
for i, k := range resourceOrphans {
// If this orphan is represented by some other node somehow,
// then ignore it.
if _, ok := resourceRep[k]; ok {
continue
}
rs := state.Resources[k]
rsk, err := ParseResourceStateKey(k)
if err != nil {
return err
}
resourceVertexes[i] = g.Add(&graphNodeOrphanResource{
Path: g.Path,
ResourceKey: rsk,
Resource: t.Resource,
Provider: rs.Provider,
dependentOn: rs.Dependencies,
})
}
}
// Go over each module orphan and add it to the graph. We store the
// vertexes and states outside so that we can connect dependencies later.
moduleOrphans := t.State.ModuleOrphans(g.Path, config)
moduleVertexes := make([]dag.Vertex, len(moduleOrphans))
for i, path := range moduleOrphans {
var deps []string
if s := t.State.ModuleByPath(path); s != nil {
deps = s.Dependencies
}
moduleVertexes[i] = g.Add(&graphNodeOrphanModule{
Path: path,
dependentOn: deps,
})
}
// Now do the dependencies. We do this _after_ adding all the orphan
// nodes above because there are cases in which the orphans themselves
// depend on other orphans.
// Resource dependencies
for _, v := range resourceVertexes {
g.ConnectDependent(v)
}
// Module dependencies
for _, v := range moduleVertexes {
g.ConnectDependent(v)
}
return nil
}
// graphNodeOrphanModule is the graph vertex representing an orphan resource..
type graphNodeOrphanModule struct {
Path []string
dependentOn []string
}
func (n *graphNodeOrphanModule) DependableName() []string {
return []string{n.dependableName()}
}
func (n *graphNodeOrphanModule) DependentOn() []string {
return n.dependentOn
}
func (n *graphNodeOrphanModule) Name() string {
return fmt.Sprintf("%s (orphan)", n.dependableName())
}
func (n *graphNodeOrphanModule) dependableName() string {
return fmt.Sprintf("module.%s", n.Path[len(n.Path)-1])
}
// GraphNodeExpandable
func (n *graphNodeOrphanModule) Expand(b GraphBuilder) (GraphNodeSubgraph, error) {
g, err := b.Build(n.Path)
if err != nil {
return nil, err
}
return &GraphNodeBasicSubgraph{
NameValue: n.Name(),
Graph: g,
}, nil
}
// graphNodeOrphanResource is the graph vertex representing an orphan resource..
type graphNodeOrphanResource struct {
Path []string
ResourceKey *ResourceStateKey
Resource *config.Resource
Provider string
dependentOn []string
}
func (n *graphNodeOrphanResource) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeResource
}
func (n *graphNodeOrphanResource) ResourceAddress() *ResourceAddress {
return &ResourceAddress{
Index: n.ResourceKey.Index,
InstanceType: TypePrimary,
Name: n.ResourceKey.Name,
Path: n.Path[1:],
Type: n.ResourceKey.Type,
Mode: n.ResourceKey.Mode,
}
}
func (n *graphNodeOrphanResource) DependableName() []string {
return []string{n.dependableName()}
}
func (n *graphNodeOrphanResource) DependentOn() []string {
return n.dependentOn
}
func (n *graphNodeOrphanResource) Flatten(p []string) (dag.Vertex, error) {
return &graphNodeOrphanResourceFlat{
graphNodeOrphanResource: n,
PathValue: p,
}, nil
}
func (n *graphNodeOrphanResource) Name() string {
return fmt.Sprintf("%s (orphan)", n.ResourceKey)
}
func (n *graphNodeOrphanResource) ProvidedBy() []string {
return []string{resourceProvider(n.ResourceKey.Type, n.Provider)}
}
// GraphNodeEvalable impl.
func (n *graphNodeOrphanResource) EvalTree() EvalNode {
seq := &EvalSequence{Nodes: make([]EvalNode, 0, 5)}
// Build instance info
info := &InstanceInfo{Id: n.ResourceKey.String(), Type: n.ResourceKey.Type}
info.uniqueExtra = "destroy"
seq.Nodes = append(seq.Nodes, &EvalInstanceInfo{Info: info})
// Each resource mode has its own lifecycle
switch n.ResourceKey.Mode {
case config.ManagedResourceMode:
seq.Nodes = append(
seq.Nodes,
n.managedResourceEvalNodes(info)...,
)
case config.DataResourceMode:
seq.Nodes = append(
seq.Nodes,
n.dataResourceEvalNodes(info)...,
)
default:
panic(fmt.Errorf("unsupported resource mode %s", n.ResourceKey.Mode))
}
return seq
}
func (n *graphNodeOrphanResource) managedResourceEvalNodes(info *InstanceInfo) []EvalNode {
var provider ResourceProvider
var state *InstanceState
nodes := make([]EvalNode, 0, 3)
// Refresh the resource
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkRefresh},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadState{
Name: n.ResourceKey.String(),
Output: &state,
},
&EvalRefresh{
Info: info,
Provider: &provider,
State: &state,
Output: &state,
},
&EvalWriteState{
Name: n.ResourceKey.String(),
ResourceType: n.ResourceKey.Type,
Provider: n.Provider,
Dependencies: n.DependentOn(),
State: &state,
},
},
},
})
// Diff the resource
var diff *InstanceDiff
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkPlan, walkPlanDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalReadState{
Name: n.ResourceKey.String(),
Output: &state,
},
&EvalDiffDestroy{
Info: info,
State: &state,
Output: &diff,
},
&EvalCheckPreventDestroy{
Resource: n.Resource,
ResourceId: n.ResourceKey.String(),
Diff: &diff,
},
&EvalWriteDiff{
Name: n.ResourceKey.String(),
Diff: &diff,
},
},
},
})
// Apply
var err error
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkApply, walkDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalReadDiff{
Name: n.ResourceKey.String(),
Diff: &diff,
},
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadState{
Name: n.ResourceKey.String(),
Output: &state,
},
&EvalApplyPre{
Info: info,
State: &state,
Diff: &diff,
},
&EvalApply{
Info: info,
State: &state,
Diff: &diff,
Provider: &provider,
Output: &state,
Error: &err,
},
&EvalWriteState{
Name: n.ResourceKey.String(),
ResourceType: n.ResourceKey.Type,
Provider: n.Provider,
Dependencies: n.DependentOn(),
State: &state,
},
&EvalApplyPost{
Info: info,
State: &state,
Error: &err,
},
&EvalUpdateStateHook{},
},
},
})
return nodes
}
func (n *graphNodeOrphanResource) dataResourceEvalNodes(info *InstanceInfo) []EvalNode {
nodes := make([]EvalNode, 0, 3)
// This will remain nil, since we don't retain states for orphaned
// data resources.
var state *InstanceState
// On both refresh and apply we just drop our state altogether,
// since the config resource validation pass will have proven that the
// resources remaining in the configuration don't need it.
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkRefresh, walkApply},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalWriteState{
Name: n.ResourceKey.String(),
ResourceType: n.ResourceKey.Type,
Provider: n.Provider,
Dependencies: n.DependentOn(),
State: &state, // state is nil
},
},
},
})
return nodes
}
func (n *graphNodeOrphanResource) dependableName() string {
return n.ResourceKey.String()
}
// GraphNodeDestroyable impl.
func (n *graphNodeOrphanResource) DestroyNode() GraphNodeDestroy {
return n
}
// GraphNodeDestroy impl.
func (n *graphNodeOrphanResource) CreateBeforeDestroy() bool {
return false
}
func (n *graphNodeOrphanResource) CreateNode() dag.Vertex {
return n
}
// Same as graphNodeOrphanResource, but for flattening
type graphNodeOrphanResourceFlat struct {
*graphNodeOrphanResource
PathValue []string
}
func (n *graphNodeOrphanResourceFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeOrphanResource.Name())
}
func (n *graphNodeOrphanResourceFlat) Path() []string {
return n.PathValue
}
// GraphNodeDestroyable impl.
func (n *graphNodeOrphanResourceFlat) DestroyNode() GraphNodeDestroy {
return n
}
// GraphNodeDestroy impl.
func (n *graphNodeOrphanResourceFlat) CreateBeforeDestroy() bool {
return false
}
func (n *graphNodeOrphanResourceFlat) CreateNode() dag.Vertex {
return n
}
func (n *graphNodeOrphanResourceFlat) ProvidedBy() []string {
return modulePrefixList(
n.graphNodeOrphanResource.ProvidedBy(),
modulePrefixStr(n.PathValue))
}

389
terraform/transform_orphan_test.go
View File

@ -1,389 +0,0 @@
package terraform
import (
"strings"
"testing"
"github.com/hashicorp/terraform/dag"
)
func TestOrphanTransformer(t *testing.T) {
mod := testModule(t, "transform-orphan-basic")
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.web": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
// The orphan
"aws_instance.db": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &OrphanTransformer{State: state, Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformOrphanBasicStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestOrphanTransformer_modules(t *testing.T) {
mod := testModule(t, "transform-orphan-modules")
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.foo": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
},
},
// Orphan module
&ModuleState{
Path: []string{RootModuleName, "foo"},
Resources: map[string]*ResourceState{
"aws_instance.web": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &OrphanTransformer{State: state, Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformOrphanModulesStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestOrphanTransformer_modulesDeps(t *testing.T) {
mod := testModule(t, "transform-orphan-modules")
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.foo": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
},
},
// Orphan module
&ModuleState{
Path: []string{RootModuleName, "foo"},
Resources: map[string]*ResourceState{
"aws_instance.web": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
},
Dependencies: []string{
"aws_instance.foo",
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &OrphanTransformer{State: state, Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformOrphanModulesDepsStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestOrphanTransformer_modulesDepsOrphan(t *testing.T) {
mod := testModule(t, "transform-orphan-modules")
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.web": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
},
},
// Orphan module
&ModuleState{
Path: []string{RootModuleName, "foo"},
Resources: map[string]*ResourceState{
"aws_instance.web": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
},
Dependencies: []string{
"aws_instance.web",
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &OrphanTransformer{State: state, Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformOrphanModulesDepsOrphanStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestOrphanTransformer_modulesNoRoot(t *testing.T) {
mod := testModule(t, "transform-orphan-modules")
state := &State{
Modules: []*ModuleState{
// Orphan module
&ModuleState{
Path: []string{RootModuleName, "foo"},
Resources: map[string]*ResourceState{
"aws_instance.web": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &OrphanTransformer{State: state, Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformOrphanModulesNoRootStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestOrphanTransformer_resourceDepends(t *testing.T) {
mod := testModule(t, "transform-orphan-basic")
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Resources: map[string]*ResourceState{
"aws_instance.web": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
},
// The orphan
"aws_instance.db": &ResourceState{
Type: "aws_instance",
Primary: &InstanceState{
ID: "foo",
},
Dependencies: []string{
"aws_instance.web",
},
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &OrphanTransformer{State: state, Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformOrphanResourceDependsStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestOrphanTransformer_nilState(t *testing.T) {
mod := testModule(t, "transform-orphan-basic")
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &OrphanTransformer{State: nil, Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformOrphanNilStateStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestGraphNodeOrphanModule_impl(t *testing.T) {
var _ dag.Vertex = new(graphNodeOrphanModule)
var _ dag.NamedVertex = new(graphNodeOrphanModule)
var _ GraphNodeExpandable = new(graphNodeOrphanModule)
}
func TestGraphNodeOrphanResource_impl(t *testing.T) {
var _ dag.Vertex = new(graphNodeOrphanResource)
var _ dag.NamedVertex = new(graphNodeOrphanResource)
var _ GraphNodeProviderConsumer = new(graphNodeOrphanResource)
var _ GraphNodeAddressable = new(graphNodeOrphanResource)
}
func TestGraphNodeOrphanResource_ProvidedBy(t *testing.T) {
n := &graphNodeOrphanResource{ResourceKey: &ResourceStateKey{Type: "aws_instance"}}
if v := n.ProvidedBy(); v[0] != "aws" {
t.Fatalf("bad: %#v", v)
}
}
func TestGraphNodeOrphanResource_ProvidedBy_alias(t *testing.T) {
n := &graphNodeOrphanResource{ResourceKey: &ResourceStateKey{Type: "aws_instance"}, Provider: "aws.bar"}
if v := n.ProvidedBy(); v[0] != "aws.bar" {
t.Fatalf("bad: %#v", v)
}
}
const testTransformOrphanBasicStr = `
aws_instance.db (orphan)
aws_instance.web
`
const testTransformOrphanModulesStr = `
aws_instance.foo
module.foo (orphan)
`
const testTransformOrphanModulesDepsStr = `
aws_instance.foo
module.foo (orphan)
aws_instance.foo
`
const testTransformOrphanModulesDepsOrphanStr = `
aws_instance.foo
aws_instance.web (orphan)
module.foo (orphan)
aws_instance.web (orphan)
`
const testTransformOrphanNilStateStr = `
aws_instance.web
`
const testTransformOrphanResourceDependsStr = `
aws_instance.db (orphan)
aws_instance.web
aws_instance.web
`
const testTransformOrphanModulesNoRootStr = `
aws_instance.foo
module.foo (orphan)
`

101
terraform/transform_output_orphan.go
View File

@ -1,101 +0,0 @@
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeOutput is an interface that nodes that are outputs must
// implement. The OutputName returned is the name of the output key
// that they manage.
type GraphNodeOutput interface {
OutputName() string
}
// AddOutputOrphanTransformer is a transformer that adds output orphans
// to the graph. Output orphans are outputs that are no longer in the
// configuration and therefore need to be removed from the state.
//
// NOTE: This is the _old_ way to add output orphans that is used with
// legacy graph builders. The new way is OrphanOutputTransformer.
type AddOutputOrphanTransformer struct {
State *State
}
func (t *AddOutputOrphanTransformer) Transform(g *Graph) error {
// Get the state for this module. If we have no state, we have no orphans
state := t.State.ModuleByPath(g.Path)
if state == nil {
return nil
}
// Create the set of outputs we do have in the graph
found := make(map[string]struct{})
for _, v := range g.Vertices() {
on, ok := v.(GraphNodeOutput)
if !ok {
continue
}
found[on.OutputName()] = struct{}{}
}
// Go over all the outputs. If we don't have a graph node for it,
// create it. It doesn't need to depend on anything, since its just
// setting it empty.
for k, _ := range state.Outputs {
if _, ok := found[k]; ok {
continue
}
g.Add(&graphNodeOrphanOutput{OutputName: k})
}
return nil
}
type graphNodeOrphanOutput struct {
OutputName string
}
func (n *graphNodeOrphanOutput) Name() string {
return fmt.Sprintf("output.%s (orphan)", n.OutputName)
}
func (n *graphNodeOrphanOutput) EvalTree() EvalNode {
return &EvalOpFilter{
Ops: []walkOperation{walkApply, walkDestroy, walkRefresh},
Node: &EvalDeleteOutput{
Name: n.OutputName,
},
}
}
// GraphNodeFlattenable impl.
func (n *graphNodeOrphanOutput) Flatten(p []string) (dag.Vertex, error) {
return &graphNodeOrphanOutputFlat{
graphNodeOrphanOutput: n,
PathValue: p,
}, nil
}
type graphNodeOrphanOutputFlat struct {
*graphNodeOrphanOutput
PathValue []string
}
func (n *graphNodeOrphanOutputFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeOrphanOutput.Name())
}
func (n *graphNodeOrphanOutputFlat) EvalTree() EvalNode {
return &EvalOpFilter{
Ops: []walkOperation{walkApply, walkDestroy, walkRefresh},
Node: &EvalDeleteOutput{
Name: n.OutputName,
},
}
}

51
terraform/transform_output_orphan_test.go
View File

@ -1,51 +0,0 @@
package terraform
import (
"strings"
"testing"
)
func TestAddOutputOrphanTransformer(t *testing.T) {
mod := testModule(t, "transform-orphan-output-basic")
state := &State{
Modules: []*ModuleState{
&ModuleState{
Path: RootModulePath,
Outputs: map[string]*OutputState{
"foo": &OutputState{
Value: "bar",
Type: "string",
},
"bar": &OutputState{
Value: "baz",
Type: "string",
},
},
},
},
}
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &AddOutputOrphanTransformer{State: state}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformOrphanOutputBasicStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
const testTransformOrphanOutputBasicStr = `
output.bar (orphan)
output.foo
`

116
terraform/transform_provider.go
View File

@ -6,7 +6,6 @@ import (
"strings"
"github.com/hashicorp/go-multierror"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
@ -15,7 +14,6 @@ import (
// they satisfy.
type GraphNodeProvider interface {
ProviderName() string
ProviderConfig() *config.RawConfig
}
// GraphNodeCloseProvider is an interface that nodes that can be a close
@ -126,7 +124,7 @@ func (t *MissingProviderTransformer) Transform(g *Graph) error {
// Initialize factory
if t.Concrete == nil {
t.Concrete = func(a *NodeAbstractProvider) dag.Vertex {
return &graphNodeProvider{ProviderNameValue: a.NameValue}
return a
}
}
@ -188,14 +186,6 @@ func (t *MissingProviderTransformer) Transform(g *Graph) error {
PathValue: path,
}).(dag.Vertex)
if len(path) > 0 {
if fn, ok := v.(GraphNodeFlattenable); ok {
var err error
v, err = fn.Flatten(path)
if err != nil {
return err
}
}
// We'll need the parent provider as well, so let's
// add a dummy node to check to make sure that we add
// that parent provider.
@ -230,9 +220,6 @@ func (t *ParentProviderTransformer) Transform(g *Graph) error {
// We eventually want to get rid of the flat version entirely so
// this is a stop-gap while it still exists.
var v dag.Vertex = raw
if f, ok := v.(*graphNodeProviderFlat); ok {
v = f.graphNodeProvider
}
// Only care about providers
pn, ok := v.(GraphNodeProvider)
@ -313,15 +300,7 @@ func providerVertexMap(g *Graph) map[string]dag.Vertex {
m := make(map[string]dag.Vertex)
for _, v := range g.Vertices() {
if pv, ok := v.(GraphNodeProvider); ok {
key := pv.ProviderName()
// This special case is because the new world view of providers
// is that they should return only their pure name (not the full
// module path with ProviderName). Working towards this future.
if _, ok := v.(*NodeApplyableProvider); ok {
key = providerMapKey(pv.ProviderName(), v)
}
key := providerMapKey(pv.ProviderName(), v)
m[key] = v
}
}
@ -376,97 +355,6 @@ func (n *graphNodeCloseProvider) DotNode(name string, opts *dag.DotOpts) *dag.Do
}
}
type graphNodeProvider struct {
ProviderNameValue string
}
func (n *graphNodeProvider) Name() string {
return fmt.Sprintf("provider.%s", n.ProviderNameValue)
}
// GraphNodeEvalable impl.
func (n *graphNodeProvider) EvalTree() EvalNode {
return ProviderEvalTree(n.ProviderNameValue, nil)
}
// GraphNodeDependable impl.
func (n *graphNodeProvider) DependableName() []string {
return []string{n.Name()}
}
// GraphNodeProvider
func (n *graphNodeProvider) ProviderName() string {
return n.ProviderNameValue
}
func (n *graphNodeProvider) ProviderConfig() *config.RawConfig {
return nil
}
// GraphNodeDotter impl.
func (n *graphNodeProvider) DotNode(name string, opts *dag.DotOpts) *dag.DotNode {
return &dag.DotNode{
Name: name,
Attrs: map[string]string{
"label": n.Name(),
"shape": "diamond",
},
}
}
// GraphNodeDotterOrigin impl.
func (n *graphNodeProvider) DotOrigin() bool {
return true
}
// GraphNodeFlattenable impl.
func (n *graphNodeProvider) Flatten(p []string) (dag.Vertex, error) {
return &graphNodeProviderFlat{
graphNodeProvider: n,
PathValue: p,
}, nil
}
// Same as graphNodeMissingProvider, but for flattening
type graphNodeProviderFlat struct {
*graphNodeProvider
PathValue []string
}
func (n *graphNodeProviderFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeProvider.Name())
}
func (n *graphNodeProviderFlat) Path() []string {
return n.PathValue
}
func (n *graphNodeProviderFlat) ProviderName() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue),
n.graphNodeProvider.ProviderName())
}
// GraphNodeDependable impl.
func (n *graphNodeProviderFlat) DependableName() []string {
return []string{n.Name()}
}
func (n *graphNodeProviderFlat) DependentOn() []string {
var result []string
// If we're in a module, then depend on all parent providers. Some of
// these may not exist, hence we depend on all of them.
for i := len(n.PathValue); i > 1; i-- {
prefix := modulePrefixStr(n.PathValue[:i-1])
result = modulePrefixList(n.graphNodeProvider.DependableName(), prefix)
}
return result
}
// graphNodeProviderConsumerDummy is a struct that never enters the real
// graph (though it could to no ill effect). It implements
// GraphNodeProviderConsumer and GraphNodeSubpath as a way to force

174
terraform/transform_provider_old.go
View File

@ -1,174 +0,0 @@
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
// DisableProviderTransformer "disables" any providers that are only
// depended on by modules.
//
// NOTE: "old" = used by old graph builders, will be removed one day
type DisableProviderTransformerOld struct{}
func (t *DisableProviderTransformerOld) Transform(g *Graph) error {
// Since we're comparing against edges, we need to make sure we connect
g.ConnectDependents()
for _, v := range g.Vertices() {
// We only care about providers
pn, ok := v.(GraphNodeProvider)
if !ok || pn.ProviderName() == "" {
continue
}
// Go through all the up-edges (things that depend on this
// provider) and if any is not a module, then ignore this node.
nonModule := false
for _, sourceRaw := range g.UpEdges(v).List() {
source := sourceRaw.(dag.Vertex)
cn, ok := source.(graphNodeConfig)
if !ok {
nonModule = true
break
}
if cn.ConfigType() != GraphNodeConfigTypeModule {
nonModule = true
break
}
}
if nonModule {
// We found something that depends on this provider that
// isn't a module, so skip it.
continue
}
// Disable the provider by replacing it with a "disabled" provider
disabled := &graphNodeDisabledProvider{GraphNodeProvider: pn}
if !g.Replace(v, disabled) {
panic(fmt.Sprintf(
"vertex disappeared from under us: %s",
dag.VertexName(v)))
}
}
return nil
}
type graphNodeDisabledProvider struct {
GraphNodeProvider
}
// GraphNodeEvalable impl.
func (n *graphNodeDisabledProvider) EvalTree() EvalNode {
var resourceConfig *ResourceConfig
return &EvalOpFilter{
Ops: []walkOperation{walkInput, walkValidate, walkRefresh, walkPlan, walkApply, walkDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalInterpolate{
Config: n.ProviderConfig(),
Output: &resourceConfig,
},
&EvalBuildProviderConfig{
Provider: n.ProviderName(),
Config: &resourceConfig,
Output: &resourceConfig,
},
&EvalSetProviderConfig{
Provider: n.ProviderName(),
Config: &resourceConfig,
},
},
},
}
}
// GraphNodeFlattenable impl.
func (n *graphNodeDisabledProvider) Flatten(p []string) (dag.Vertex, error) {
return &graphNodeDisabledProviderFlat{
graphNodeDisabledProvider: n,
PathValue: p,
}, nil
}
func (n *graphNodeDisabledProvider) Name() string {
return fmt.Sprintf("%s (disabled)", dag.VertexName(n.GraphNodeProvider))
}
// GraphNodeDotter impl.
func (n *graphNodeDisabledProvider) DotNode(name string, opts *dag.DotOpts) *dag.DotNode {
return &dag.DotNode{
Name: name,
Attrs: map[string]string{
"label": n.Name(),
"shape": "diamond",
},
}
}
// GraphNodeDotterOrigin impl.
func (n *graphNodeDisabledProvider) DotOrigin() bool {
return true
}
// GraphNodeDependable impl.
func (n *graphNodeDisabledProvider) DependableName() []string {
return []string{"provider." + n.ProviderName()}
}
// GraphNodeProvider impl.
func (n *graphNodeDisabledProvider) ProviderName() string {
return n.GraphNodeProvider.ProviderName()
}
// GraphNodeProvider impl.
func (n *graphNodeDisabledProvider) ProviderConfig() *config.RawConfig {
return n.GraphNodeProvider.ProviderConfig()
}
// Same as graphNodeDisabledProvider, but for flattening
type graphNodeDisabledProviderFlat struct {
*graphNodeDisabledProvider
PathValue []string
}
func (n *graphNodeDisabledProviderFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeDisabledProvider.Name())
}
func (n *graphNodeDisabledProviderFlat) Path() []string {
return n.PathValue
}
func (n *graphNodeDisabledProviderFlat) ProviderName() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue),
n.graphNodeDisabledProvider.ProviderName())
}
// GraphNodeDependable impl.
func (n *graphNodeDisabledProviderFlat) DependableName() []string {
return modulePrefixList(
n.graphNodeDisabledProvider.DependableName(),
modulePrefixStr(n.PathValue))
}
func (n *graphNodeDisabledProviderFlat) DependentOn() []string {
var result []string
// If we're in a module, then depend on our parent's provider
if len(n.PathValue) > 1 {
prefix := modulePrefixStr(n.PathValue[:len(n.PathValue)-1])
result = modulePrefixList(
n.graphNodeDisabledProvider.DependableName(), prefix)
}
return result
}

122
terraform/transform_provider_test.go
View File

@ -3,8 +3,6 @@ package terraform
import (
"strings"
"testing"
"github.com/hashicorp/terraform/dag"
)
func TestProviderTransformer(t *testing.T) {
@ -12,12 +10,26 @@ func TestProviderTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &MissingProviderTransformer{Providers: []string{"aws"}}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
transform := &ProviderTransformer{}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
@ -73,12 +85,26 @@ func TestCloseProviderTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &MissingProviderTransformer{Providers: []string{"aws"}}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &ProviderTransformer{}
if err := transform.Transform(&g); err != nil {
@ -105,7 +131,8 @@ func TestCloseProviderTransformer_withTargets(t *testing.T) {
g := Graph{Path: RootModulePath}
transforms := []GraphTransformer{
&ConfigTransformerOld{Module: mod},
&ConfigTransformer{Module: mod},
&MissingProviderTransformer{Providers: []string{"aws"}},
&ProviderTransformer{},
&CloseProviderTransformer{},
&TargetsTransformer{
@ -135,14 +162,21 @@ func TestMissingProviderTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &MissingProviderTransformer{Providers: []string{"foo", "bar"}}
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &MissingProviderTransformer{Providers: []string{"aws", "foo", "bar"}}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
@ -318,12 +352,19 @@ func TestPruneProviderTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &MissingProviderTransformer{Providers: []string{"foo"}}
if err := transform.Transform(&g); err != nil {
@ -359,71 +400,6 @@ func TestPruneProviderTransformer(t *testing.T) {
}
}
func TestDisableProviderTransformer(t *testing.T) {
mod := testModule(t, "transform-provider-disable")
g := Graph{Path: RootModulePath}
transforms := []GraphTransformer{
&ConfigTransformerOld{Module: mod},
&MissingProviderTransformer{Providers: []string{"aws"}},
&ProviderTransformer{},
&DisableProviderTransformerOld{},
&CloseProviderTransformer{},
&PruneProviderTransformer{},
}
for _, tr := range transforms {
if err := tr.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformDisableProviderBasicStr)
if actual != expected {
t.Fatalf("expected:\n%s\n\ngot:\n%s\n", expected, actual)
}
}
func TestDisableProviderTransformer_keep(t *testing.T) {
mod := testModule(t, "transform-provider-disable-keep")
g := Graph{Path: RootModulePath}
transforms := []GraphTransformer{
&ConfigTransformerOld{Module: mod},
&MissingProviderTransformer{Providers: []string{"aws"}},
&ProviderTransformer{},
&DisableProviderTransformerOld{},
&CloseProviderTransformer{},
&PruneProviderTransformer{},
}
for _, tr := range transforms {
if err := tr.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testTransformDisableProviderKeepStr)
if actual != expected {
t.Fatalf("expected:\n%s\n\ngot:\n%s\n", expected, actual)
}
}
func TestGraphNodeProvider_impl(t *testing.T) {
var _ dag.Vertex = new(graphNodeProvider)
var _ dag.NamedVertex = new(graphNodeProvider)
var _ GraphNodeProvider = new(graphNodeProvider)
}
func TestGraphNodeProvider_ProviderName(t *testing.T) {
n := &graphNodeProvider{ProviderNameValue: "foo"}
if v := n.ProviderName(); v != "foo" {
t.Fatalf("bad: %#v", v)
}
}
const testTransformProviderBasicStr = `
aws_instance.web
provider.aws

65
terraform/transform_provisioner.go
View File

@ -107,18 +107,9 @@ func (t *MissingProvisionerTransformer) Transform(g *Graph) error {
}
// Build the vertex
var newV dag.Vertex = &graphNodeProvisioner{ProvisionerNameValue: p}
if len(path) > 0 {
// If we have a path, we do the flattening immediately. This
// is to support new-style graph nodes that are already
// flattened.
if fn, ok := newV.(GraphNodeFlattenable); ok {
var err error
newV, err = fn.Flatten(path)
if err != nil {
return err
}
}
var newV dag.Vertex = &NodeProvisioner{
NameValue: p,
PathValue: path,
}
// Add the missing provisioner node to the graph
@ -178,7 +169,8 @@ func provisionerVertexMap(g *Graph) map[string]dag.Vertex {
m := make(map[string]dag.Vertex)
for _, v := range g.Vertices() {
if pv, ok := v.(GraphNodeProvisioner); ok {
m[pv.ProvisionerName()] = v
key := provisionerMapKey(pv.ProvisionerName(), v)
m[key] = v
}
}
@ -212,50 +204,3 @@ func (n *graphNodeCloseProvisioner) EvalTree() EvalNode {
func (n *graphNodeCloseProvisioner) CloseProvisionerName() string {
return n.ProvisionerNameValue
}
type graphNodeProvisioner struct {
ProvisionerNameValue string
}
func (n *graphNodeProvisioner) Name() string {
return fmt.Sprintf("provisioner.%s", n.ProvisionerNameValue)
}
// GraphNodeEvalable impl.
func (n *graphNodeProvisioner) EvalTree() EvalNode {
return &EvalInitProvisioner{Name: n.ProvisionerNameValue}
}
func (n *graphNodeProvisioner) ProvisionerName() string {
return n.ProvisionerNameValue
}
// GraphNodeFlattenable impl.
func (n *graphNodeProvisioner) Flatten(p []string) (dag.Vertex, error) {
return &graphNodeProvisionerFlat{
graphNodeProvisioner: n,
PathValue: p,
}, nil
}
// Same as graphNodeMissingProvisioner, but for flattening
type graphNodeProvisionerFlat struct {
*graphNodeProvisioner
PathValue []string
}
func (n *graphNodeProvisionerFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeProvisioner.Name())
}
func (n *graphNodeProvisionerFlat) Path() []string {
return n.PathValue
}
func (n *graphNodeProvisionerFlat) ProvisionerName() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue),
n.graphNodeProvisioner.ProvisionerName())
}

30
terraform/transform_provisioner_test.go
View File

@ -12,12 +12,19 @@ func TestMissingProvisionerTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &MissingProvisionerTransformer{Provisioners: []string{"shell"}}
if err := transform.Transform(&g); err != nil {
@ -112,12 +119,19 @@ func TestCloseProvisionerTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &MissingProvisionerTransformer{Provisioners: []string{"shell"}}
if err := transform.Transform(&g); err != nil {
@ -145,18 +159,6 @@ func TestCloseProvisionerTransformer(t *testing.T) {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestGraphNodeProvisioner_impl(t *testing.T) {
var _ dag.Vertex = new(graphNodeProvisioner)
var _ dag.NamedVertex = new(graphNodeProvisioner)
var _ GraphNodeProvisioner = new(graphNodeProvisioner)
}
func TestGraphNodeProvisioner_ProvisionerName(t *testing.T) {
n := &graphNodeProvisioner{ProvisionerNameValue: "foo"}
if v := n.ProvisionerName(); v != "foo" {
t.Fatalf("bad: %#v", v)
}
}
const testTransformMissingProvisionerBasicStr = `
aws_instance.web

62
terraform/transform_proxy.go
View File

@ -1,62 +0,0 @@
package terraform
import (
"github.com/hashicorp/terraform/dag"
)
// GraphNodeProxy must be implemented by nodes that are proxies.
//
// A node that is a proxy says that anything that depends on this
// node (the proxy), should also copy all the things that the proxy
// itself depends on. Example:
//
// A => proxy => C
//
// Should transform into (two edges):
//
// A => proxy => C
// A => C
//
// The purpose for this is because some transforms only look at direct
// edge connections and the proxy generally isn't meaningful in those
// situations, so we should complete all the edges.
type GraphNodeProxy interface {
Proxy() bool
}
// ProxyTransformer is a transformer that goes through the graph, finds
// vertices that are marked as proxies, and connects through their
// dependents. See above for what a proxy is.
type ProxyTransformer struct{}
func (t *ProxyTransformer) Transform(g *Graph) error {
for _, v := range g.Vertices() {
pn, ok := v.(GraphNodeProxy)
if !ok {
continue
}
// If we don't want to be proxies, don't do it
if !pn.Proxy() {
continue
}
// Connect all the things that depend on this to things that
// we depend on as the proxy. See docs for GraphNodeProxy for
// a visual explanation.
for _, s := range g.UpEdges(v).List() {
for _, t := range g.DownEdges(v).List() {
g.Connect(GraphProxyEdge{
Edge: dag.BasicEdge(s, t),
})
}
}
}
return nil
}
// GraphProxyEdge is the edge that is used for proxied edges.
type GraphProxyEdge struct {
dag.Edge
}

52
terraform/transform_proxy_test.go
View File

@ -1,52 +0,0 @@
package terraform
import (
"strings"
"testing"
"github.com/hashicorp/terraform/dag"
)
func TestProxyTransformer(t *testing.T) {
var g Graph
proxy := &testNodeProxy{NameValue: "proxy"}
g.Add("A")
g.Add("C")
g.Add(proxy)
g.Connect(dag.BasicEdge("A", proxy))
g.Connect(dag.BasicEdge(proxy, "C"))
{
tf := &ProxyTransformer{}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testProxyTransformStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
type testNodeProxy struct {
NameValue string
}
func (n *testNodeProxy) Name() string {
return n.NameValue
}
func (n *testNodeProxy) Proxy() bool {
return true
}
const testProxyTransformStr = `
A
C
proxy
C
proxy
C
`

19
terraform/transform_reference.go
View File

@ -300,3 +300,22 @@ func ReferenceFromInterpolatedVar(v config.InterpolatedVariable) []string {
return nil
}
}
func modulePrefixStr(p []string) string {
parts := make([]string, 0, len(p)*2)
for _, p := range p[1:] {
parts = append(parts, "module", p)
}
return strings.Join(parts, ".")
}
func modulePrefixList(result []string, prefix string) []string {
if prefix != "" {
for i, v := range result {
result[i] = fmt.Sprintf("%s.%s", prefix, v)
}
}
return result
}

967
terraform/transform_resource.go
View File

@ -1,967 +0,0 @@
package terraform
import (
"fmt"
"strings"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
// ResourceCountTransformerOld is a GraphTransformer that expands the count
// out for a specific resource.
type ResourceCountTransformerOld struct {
Resource *config.Resource
Destroy bool
Targets []ResourceAddress
}
func (t *ResourceCountTransformerOld) Transform(g *Graph) error {
// Expand the resource count
count, err := t.Resource.Count()
if err != nil {
return err
}
// Don't allow the count to be negative
if count < 0 {
return fmt.Errorf("negative count: %d", count)
}
// For each count, build and add the node
nodes := make([]dag.Vertex, 0, count)
for i := 0; i < count; i++ {
// Set the index. If our count is 1 we special case it so that
// we handle the "resource.0" and "resource" boundary properly.
index := i
if count == 1 {
index = -1
}
// Save the node for later so we can do connections. Make the
// proper node depending on if we're just a destroy node or if
// were a regular node.
var node dag.Vertex = &graphNodeExpandedResource{
Index: index,
Resource: t.Resource,
Path: g.Path,
}
if t.Destroy {
node = &graphNodeExpandedResourceDestroy{
graphNodeExpandedResource: node.(*graphNodeExpandedResource),
}
}
// Skip nodes if targeting excludes them
if !t.nodeIsTargeted(node) {
continue
}
// Add the node now
nodes = append(nodes, node)
g.Add(node)
}
// Make the dependency connections
for _, n := range nodes {
// Connect the dependents. We ignore the return value for missing
// dependents since that should've been caught at a higher level.
g.ConnectDependent(n)
}
return nil
}
func (t *ResourceCountTransformerOld) nodeIsTargeted(node dag.Vertex) bool {
// no targets specified, everything stays in the graph
if len(t.Targets) == 0 {
return true
}
addressable, ok := node.(GraphNodeAddressable)
if !ok {
return false
}
addr := addressable.ResourceAddress()
for _, targetAddr := range t.Targets {
if targetAddr.Equals(addr) {
return true
}
}
return false
}
type graphNodeExpandedResource struct {
Index int
Resource *config.Resource
Path []string
}
func (n *graphNodeExpandedResource) Name() string {
if n.Index == -1 {
return n.Resource.Id()
}
return fmt.Sprintf("%s #%d", n.Resource.Id(), n.Index)
}
// GraphNodeAddressable impl.
func (n *graphNodeExpandedResource) ResourceAddress() *ResourceAddress {
// We want this to report the logical index properly, so we must undo the
// special case from the expand
index := n.Index
if index == -1 {
index = 0
}
return &ResourceAddress{
Path: n.Path[1:],
Index: index,
InstanceType: TypePrimary,
Name: n.Resource.Name,
Type: n.Resource.Type,
Mode: n.Resource.Mode,
}
}
// graphNodeConfig impl.
func (n *graphNodeExpandedResource) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeResource
}
// GraphNodeDependable impl.
func (n *graphNodeExpandedResource) DependableName() []string {
return []string{
n.Resource.Id(),
n.stateId(),
}
}
// GraphNodeDependent impl.
func (n *graphNodeExpandedResource) DependentOn() []string {
configNode := &GraphNodeConfigResource{Resource: n.Resource}
result := configNode.DependentOn()
// Walk the variables to find any count-specific variables we depend on.
configNode.VarWalk(func(v config.InterpolatedVariable) {
rv, ok := v.(*config.ResourceVariable)
if !ok {
return
}
// We only want ourselves
if rv.ResourceId() != n.Resource.Id() {
return
}
// If this isn't a multi-access (which shouldn't be allowed but
// is verified elsewhere), then we depend on the specific count
// of this resource, ignoring ourself (which again should be
// validated elsewhere).
if rv.Index > -1 {
id := fmt.Sprintf("%s.%d", rv.ResourceId(), rv.Index)
if id != n.stateId() && id != n.stateId()+".0" {
result = append(result, id)
}
}
})
return result
}
// GraphNodeProviderConsumer
func (n *graphNodeExpandedResource) ProvidedBy() []string {
return []string{resourceProvider(n.Resource.Type, n.Resource.Provider)}
}
func (n *graphNodeExpandedResource) StateDependencies() []string {
depsRaw := n.DependentOn()
deps := make([]string, 0, len(depsRaw))
for _, d := range depsRaw {
// Ignore any variable dependencies
if strings.HasPrefix(d, "var.") {
continue
}
// This is sad. The dependencies are currently in the format of
// "module.foo.bar" (the full field). This strips the field off.
if strings.HasPrefix(d, "module.") {
parts := strings.SplitN(d, ".", 3)
d = strings.Join(parts[0:2], ".")
}
deps = append(deps, d)
}
return deps
}
// GraphNodeEvalable impl.
func (n *graphNodeExpandedResource) EvalTree() EvalNode {
var provider ResourceProvider
var resourceConfig *ResourceConfig
// Build the resource. If we aren't part of a multi-resource, then
// we still consider ourselves as count index zero.
index := n.Index
if index < 0 {
index = 0
}
resource := &Resource{
Name: n.Resource.Name,
Type: n.Resource.Type,
CountIndex: index,
}
seq := &EvalSequence{Nodes: make([]EvalNode, 0, 5)}
// Validate the resource
vseq := &EvalSequence{Nodes: make([]EvalNode, 0, 5)}
vseq.Nodes = append(vseq.Nodes, &EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
})
vseq.Nodes = append(vseq.Nodes, &EvalInterpolate{
Config: n.Resource.RawConfig.Copy(),
Resource: resource,
Output: &resourceConfig,
})
vseq.Nodes = append(vseq.Nodes, &EvalValidateResource{
Provider: &provider,
Config: &resourceConfig,
ResourceName: n.Resource.Name,
ResourceType: n.Resource.Type,
ResourceMode: n.Resource.Mode,
})
// Validate all the provisioners
for _, p := range n.Resource.Provisioners {
var provisioner ResourceProvisioner
vseq.Nodes = append(vseq.Nodes, &EvalGetProvisioner{
Name: p.Type,
Output: &provisioner,
}, &EvalInterpolate{
Config: p.RawConfig.Copy(),
Resource: resource,
Output: &resourceConfig,
}, &EvalValidateProvisioner{
Provisioner: &provisioner,
Config: &resourceConfig,
})
}
// Add the validation operations
seq.Nodes = append(seq.Nodes, &EvalOpFilter{
Ops: []walkOperation{walkValidate},
Node: vseq,
})
// Build instance info
info := n.instanceInfo()
seq.Nodes = append(seq.Nodes, &EvalInstanceInfo{Info: info})
// Each resource mode has its own lifecycle
switch n.Resource.Mode {
case config.ManagedResourceMode:
seq.Nodes = append(
seq.Nodes,
n.managedResourceEvalNodes(resource, info, resourceConfig)...,
)
case config.DataResourceMode:
seq.Nodes = append(
seq.Nodes,
n.dataResourceEvalNodes(resource, info, resourceConfig)...,
)
default:
panic(fmt.Errorf("unsupported resource mode %s", n.Resource.Mode))
}
return seq
}
func (n *graphNodeExpandedResource) managedResourceEvalNodes(resource *Resource, info *InstanceInfo, resourceConfig *ResourceConfig) []EvalNode {
var diff *InstanceDiff
var provider ResourceProvider
var state *InstanceState
nodes := make([]EvalNode, 0, 5)
// Refresh the resource
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkRefresh},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadState{
Name: n.stateId(),
Output: &state,
},
&EvalRefresh{
Info: info,
Provider: &provider,
State: &state,
Output: &state,
},
&EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state,
},
},
},
})
// Diff the resource
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkPlan},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalInterpolate{
Config: n.Resource.RawConfig.Copy(),
Resource: resource,
Output: &resourceConfig,
},
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
// Re-run validation to catch any errors we missed, e.g. type
// mismatches on computed values.
&EvalValidateResource{
Provider: &provider,
Config: &resourceConfig,
ResourceName: n.Resource.Name,
ResourceType: n.Resource.Type,
ResourceMode: n.Resource.Mode,
IgnoreWarnings: true,
},
&EvalReadState{
Name: n.stateId(),
Output: &state,
},
&EvalDiff{
Info: info,
Config: &resourceConfig,
Resource: n.Resource,
Provider: &provider,
State: &state,
OutputDiff: &diff,
OutputState: &state,
},
&EvalCheckPreventDestroy{
Resource: n.Resource,
Diff: &diff,
},
&EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state,
},
&EvalWriteDiff{
Name: n.stateId(),
Diff: &diff,
},
},
},
})
// Diff the resource for destruction
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkPlanDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalReadState{
Name: n.stateId(),
Output: &state,
},
&EvalDiffDestroy{
Info: info,
State: &state,
Output: &diff,
},
&EvalCheckPreventDestroy{
Resource: n.Resource,
Diff: &diff,
},
&EvalWriteDiff{
Name: n.stateId(),
Diff: &diff,
},
},
},
})
// Apply
var diffApply *InstanceDiff
var err error
var createNew bool
var createBeforeDestroyEnabled bool
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkApply, walkDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
// Get the saved diff for apply
&EvalReadDiff{
Name: n.stateId(),
Diff: &diffApply,
},
// We don't want to do any destroys
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
if diffApply == nil {
return true, EvalEarlyExitError{}
}
if diffApply.GetDestroy() && diffApply.GetAttributesLen() == 0 {
return true, EvalEarlyExitError{}
}
diffApply.SetDestroy(false)
return true, nil
},
Then: EvalNoop{},
},
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
destroy := false
if diffApply != nil {
destroy = diffApply.GetDestroy() || diffApply.RequiresNew()
}
createBeforeDestroyEnabled =
n.Resource.Lifecycle.CreateBeforeDestroy &&
destroy
return createBeforeDestroyEnabled, nil
},
Then: &EvalDeposeState{
Name: n.stateId(),
},
},
&EvalInterpolate{
Config: n.Resource.RawConfig.Copy(),
Resource: resource,
Output: &resourceConfig,
},
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadState{
Name: n.stateId(),
Output: &state,
},
// Re-run validation to catch any errors we missed, e.g. type
// mismatches on computed values.
&EvalValidateResource{
Provider: &provider,
Config: &resourceConfig,
ResourceName: n.Resource.Name,
ResourceType: n.Resource.Type,
ResourceMode: n.Resource.Mode,
IgnoreWarnings: true,
},
&EvalDiff{
Info: info,
Config: &resourceConfig,
Resource: n.Resource,
Provider: &provider,
Diff: &diffApply,
State: &state,
OutputDiff: &diffApply,
},
// Get the saved diff
&EvalReadDiff{
Name: n.stateId(),
Diff: &diff,
},
// Compare the diffs
&EvalCompareDiff{
Info: info,
One: &diff,
Two: &diffApply,
},
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadState{
Name: n.stateId(),
Output: &state,
},
&EvalApplyPre{
Info: info,
State: &state,
Diff: &diffApply,
},
&EvalApply{
Info: info,
State: &state,
Diff: &diffApply,
Provider: &provider,
Output: &state,
Error: &err,
CreateNew: &createNew,
},
&EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state,
},
&EvalApplyProvisioners{
Info: info,
State: &state,
Resource: n.Resource,
InterpResource: resource,
CreateNew: &createNew,
Error: &err,
},
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
return createBeforeDestroyEnabled && err != nil, nil
},
Then: &EvalUndeposeState{
Name: n.stateId(),
State: &state,
},
Else: &EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state,
},
},
// We clear the diff out here so that future nodes
// don't see a diff that is already complete. There
// is no longer a diff!
&EvalWriteDiff{
Name: n.stateId(),
Diff: nil,
},
&EvalApplyPost{
Info: info,
State: &state,
Error: &err,
},
&EvalUpdateStateHook{},
},
},
})
return nodes
}
func (n *graphNodeExpandedResource) dataResourceEvalNodes(resource *Resource, info *InstanceInfo, resourceConfig *ResourceConfig) []EvalNode {
//var diff *InstanceDiff
var provider ResourceProvider
var config *ResourceConfig
var diff *InstanceDiff
var state *InstanceState
nodes := make([]EvalNode, 0, 5)
// Refresh the resource
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkRefresh},
Node: &EvalSequence{
Nodes: []EvalNode{
// Always destroy the existing state first, since we must
// make sure that values from a previous read will not
// get interpolated if we end up needing to defer our
// loading until apply time.
&EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state, // state is nil here
},
&EvalInterpolate{
Config: n.Resource.RawConfig.Copy(),
Resource: resource,
Output: &config,
},
// The rest of this pass can proceed only if there are no
// computed values in our config.
// (If there are, we'll deal with this during the plan and
// apply phases.)
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
if config.ComputedKeys != nil && len(config.ComputedKeys) > 0 {
return true, EvalEarlyExitError{}
}
// If the config explicitly has a depends_on for this
// data source, assume the intention is to prevent
// refreshing ahead of that dependency.
if len(n.Resource.DependsOn) > 0 {
return true, EvalEarlyExitError{}
}
return true, nil
},
Then: EvalNoop{},
},
// The remainder of this pass is the same as running
// a "plan" pass immediately followed by an "apply" pass,
// populating the state early so it'll be available to
// provider configurations that need this data during
// refresh/plan.
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadDataDiff{
Info: info,
Config: &config,
Provider: &provider,
Output: &diff,
OutputState: &state,
},
&EvalReadDataApply{
Info: info,
Diff: &diff,
Provider: &provider,
Output: &state,
},
&EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state,
},
&EvalUpdateStateHook{},
},
},
})
// Diff the resource
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkPlan},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalReadState{
Name: n.stateId(),
Output: &state,
},
// We need to re-interpolate the config here because some
// of the attributes may have become computed during
// earlier planning, due to other resources having
// "requires new resource" diffs.
&EvalInterpolate{
Config: n.Resource.RawConfig.Copy(),
Resource: resource,
Output: &config,
},
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
computed := config.ComputedKeys != nil && len(config.ComputedKeys) > 0
// If the configuration is complete and we
// already have a state then we don't need to
// do any further work during apply, because we
// already populated the state during refresh.
if !computed && state != nil {
return true, EvalEarlyExitError{}
}
return true, nil
},
Then: EvalNoop{},
},
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadDataDiff{
Info: info,
Config: &config,
Provider: &provider,
Output: &diff,
OutputState: &state,
},
&EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state,
},
&EvalWriteDiff{
Name: n.stateId(),
Diff: &diff,
},
},
},
})
// Diff the resource for destruction
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkPlanDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalReadState{
Name: n.stateId(),
Output: &state,
},
// Since EvalDiffDestroy doesn't interact with the
// provider at all, we can safely share the same
// implementation for data vs. managed resources.
&EvalDiffDestroy{
Info: info,
State: &state,
Output: &diff,
},
&EvalWriteDiff{
Name: n.stateId(),
Diff: &diff,
},
},
},
})
// Apply
nodes = append(nodes, &EvalOpFilter{
Ops: []walkOperation{walkApply, walkDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
// Get the saved diff for apply
&EvalReadDiff{
Name: n.stateId(),
Diff: &diff,
},
// Stop here if we don't actually have a diff
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
if diff == nil {
return true, EvalEarlyExitError{}
}
if diff.GetAttributesLen() == 0 {
return true, EvalEarlyExitError{}
}
return true, nil
},
Then: EvalNoop{},
},
// We need to re-interpolate the config here, rather than
// just using the diff's values directly, because we've
// potentially learned more variable values during the
// apply pass that weren't known when the diff was produced.
&EvalInterpolate{
Config: n.Resource.RawConfig.Copy(),
Resource: resource,
Output: &config,
},
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
// Make a new diff with our newly-interpolated config.
&EvalReadDataDiff{
Info: info,
Config: &config,
Previous: &diff,
Provider: &provider,
Output: &diff,
},
&EvalReadDataApply{
Info: info,
Diff: &diff,
Provider: &provider,
Output: &state,
},
&EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state,
},
// Clear the diff now that we've applied it, so
// later nodes won't see a diff that's now a no-op.
&EvalWriteDiff{
Name: n.stateId(),
Diff: nil,
},
&EvalUpdateStateHook{},
},
},
})
return nodes
}
// instanceInfo is used for EvalTree.
func (n *graphNodeExpandedResource) instanceInfo() *InstanceInfo {
return &InstanceInfo{Id: n.stateId(), Type: n.Resource.Type}
}
// stateId is the name used for the state key
func (n *graphNodeExpandedResource) stateId() string {
if n.Index == -1 {
return n.Resource.Id()
}
return fmt.Sprintf("%s.%d", n.Resource.Id(), n.Index)
}
// GraphNodeStateRepresentative impl.
func (n *graphNodeExpandedResource) StateId() []string {
return []string{n.stateId()}
}
// graphNodeExpandedResourceDestroy represents an expanded resource that
// is to be destroyed.
type graphNodeExpandedResourceDestroy struct {
*graphNodeExpandedResource
}
func (n *graphNodeExpandedResourceDestroy) Name() string {
return fmt.Sprintf("%s (destroy)", n.graphNodeExpandedResource.Name())
}
// graphNodeConfig impl.
func (n *graphNodeExpandedResourceDestroy) ConfigType() GraphNodeConfigType {
return GraphNodeConfigTypeResource
}
// GraphNodeEvalable impl.
func (n *graphNodeExpandedResourceDestroy) EvalTree() EvalNode {
info := n.instanceInfo()
info.uniqueExtra = "destroy"
var diffApply *InstanceDiff
var provider ResourceProvider
var state *InstanceState
var err error
return &EvalOpFilter{
Ops: []walkOperation{walkApply, walkDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
// Get the saved diff for apply
&EvalReadDiff{
Name: n.stateId(),
Diff: &diffApply,
},
// Filter the diff so we only get the destroy
&EvalFilterDiff{
Diff: &diffApply,
Output: &diffApply,
Destroy: true,
},
// If we're not destroying, then compare diffs
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
if diffApply != nil && diffApply.GetDestroy() {
return true, nil
}
return true, EvalEarlyExitError{}
},
Then: EvalNoop{},
},
// Load the instance info so we have the module path set
&EvalInstanceInfo{Info: info},
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadState{
Name: n.stateId(),
Output: &state,
},
&EvalRequireState{
State: &state,
},
// Make sure we handle data sources properly.
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
if n.Resource.Mode == config.DataResourceMode {
return true, nil
}
return false, nil
},
Then: &EvalReadDataApply{
Info: info,
Diff: &diffApply,
Provider: &provider,
Output: &state,
},
Else: &EvalApply{
Info: info,
State: &state,
Diff: &diffApply,
Provider: &provider,
Output: &state,
Error: &err,
},
},
&EvalWriteState{
Name: n.stateId(),
ResourceType: n.Resource.Type,
Provider: n.Resource.Provider,
Dependencies: n.StateDependencies(),
State: &state,
},
&EvalApplyPost{
Info: info,
State: &state,
Error: &err,
},
},
},
}
}

69
terraform/transform_resource_test.go
View File

@ -1,69 +0,0 @@
package terraform
import (
"strings"
"testing"
)
func TestResourceCountTransformerOld(t *testing.T) {
cfg := testModule(t, "transform-resource-count-basic").Config()
resource := cfg.Resources[0]
g := Graph{Path: RootModulePath}
{
tf := &ResourceCountTransformerOld{Resource: resource}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testResourceCountTransformOldStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
func TestResourceCountTransformerOld_countNegative(t *testing.T) {
cfg := testModule(t, "transform-resource-count-negative").Config()
resource := cfg.Resources[0]
g := Graph{Path: RootModulePath}
{
tf := &ResourceCountTransformerOld{Resource: resource}
if err := tf.Transform(&g); err == nil {
t.Fatal("should error")
}
}
}
func TestResourceCountTransformerOld_deps(t *testing.T) {
cfg := testModule(t, "transform-resource-count-deps").Config()
resource := cfg.Resources[0]
g := Graph{Path: RootModulePath}
{
tf := &ResourceCountTransformerOld{Resource: resource}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
actual := strings.TrimSpace(g.String())
expected := strings.TrimSpace(testResourceCountTransformOldDepsStr)
if actual != expected {
t.Fatalf("bad:\n\n%s", actual)
}
}
const testResourceCountTransformOldStr = `
aws_instance.foo #0
aws_instance.foo #1
aws_instance.foo #2
`
const testResourceCountTransformOldDepsStr = `
aws_instance.foo #0
aws_instance.foo #1
aws_instance.foo #0
`

4
terraform/transform_root.go
View File

@ -36,7 +36,3 @@ type graphNodeRoot struct{}
func (n graphNodeRoot) Name() string {
return rootNodeName
}
func (n graphNodeRoot) Flatten(p []string) (dag.Vertex, error) {
return n, nil
}

11
terraform/transform_root_test.go
View File

@ -10,12 +10,21 @@ func TestRootTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &MissingProviderTransformer{
Providers: []string{"aws", "do"},
}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &ProviderTransformer{}
if err := transform.Transform(&g); err != nil {

24
terraform/transform_targets.go
View File

@ -6,6 +6,15 @@ import (
"github.com/hashicorp/terraform/dag"
)
// GraphNodeTargetable is an interface for graph nodes to implement when they
// need to be told about incoming targets. This is useful for nodes that need
// to respect targets as they dynamically expand. Note that the list of targets
// provided will contain every target provided, and each implementing graph
// node must filter this list to targets considered relevant.
type GraphNodeTargetable interface {
SetTargets([]ResourceAddress)
}
// TargetsTransformer is a GraphTransformer that, when the user specifies a
// list of resources to target, limits the graph to only those resources and
// their dependencies.
@ -40,7 +49,7 @@ func (t *TargetsTransformer) Transform(g *Graph) error {
for _, v := range g.Vertices() {
removable := false
if _, ok := v.(GraphNodeAddressable); ok {
if _, ok := v.(GraphNodeResource); ok {
removable = true
}
if vr, ok := v.(RemovableIfNotTargeted); ok {
@ -90,15 +99,6 @@ func (t *TargetsTransformer) selectTargetedNodes(
var err error
if t.Destroy {
deps, err = g.Descendents(v)
// Select any variables that we depend on in case we need them later for
// interpolating in the count
ancestors, _ := g.Ancestors(v)
for _, a := range ancestors.List() {
if _, ok := a.(*GraphNodeConfigVariableFlat); ok {
deps.Add(a)
}
}
} else {
deps, err = g.Ancestors(v)
}
@ -117,12 +117,12 @@ func (t *TargetsTransformer) selectTargetedNodes(
func (t *TargetsTransformer) nodeIsTarget(
v dag.Vertex, addrs []ResourceAddress) bool {
r, ok := v.(GraphNodeAddressable)
r, ok := v.(GraphNodeResource)
if !ok {
return false
}
addr := r.ResourceAddress()
addr := r.ResourceAddr()
for _, targetAddr := range addrs {
if targetAddr.Equals(addr) {
return true

32
terraform/transform_targets_test.go
View File

@ -10,12 +10,26 @@ func TestTargetsTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &ReferenceTransformer{}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &TargetsTransformer{Targets: []string{"aws_instance.me"}}
if err := transform.Transform(&g); err != nil {
@ -41,12 +55,26 @@ func TestTargetsTransformer_destroy(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &ReferenceTransformer{}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &TargetsTransformer{
Targets: []string{"aws_instance.me"},

16
terraform/transform_transitive_reduction_test.go
View File

@ -10,12 +10,26 @@ func TestTransitiveReductionTransformer(t *testing.T) {
g := Graph{Path: RootModulePath}
{
tf := &ConfigTransformerOld{Module: mod}
tf := &ConfigTransformer{Module: mod}
if err := tf.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &AttachResourceConfigTransformer{Module: mod}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &ReferenceTransformer{}
if err := transform.Transform(&g); err != nil {
t.Fatalf("err: %s", err)
}
}
{
transform := &TransitiveReductionTransformer{}
if err := transform.Transform(&g); err != nil {