terraform/command/jsonplan/values.go

255 lines
7.0 KiB
Go

package jsonplan
import (
"encoding/json"
"fmt"
"sort"
"github.com/zclconf/go-cty/cty"
ctyjson "github.com/zclconf/go-cty/cty/json"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/configs/configschema"
"github.com/hashicorp/terraform/plans"
"github.com/hashicorp/terraform/terraform"
)
// stateValues is the common representation of resolved values for both the
// prior state (which is always complete) and the planned new state.
type stateValues struct {
Outputs map[string]output `json:"outputs,omitempty"`
RootModule module `json:"root_module,omitempty"`
}
// attributeValues is the JSON representation of the attribute values of the
// resource, whose structure depends on the resource type schema.
type attributeValues map[string]interface{}
func marshalAttributeValues(value cty.Value, schema *configschema.Block) attributeValues {
if value == cty.NilVal || value.IsNull() {
return nil
}
ret := make(attributeValues)
it := value.ElementIterator()
for it.Next() {
k, v := it.Element()
vJSON, _ := ctyjson.Marshal(v, v.Type())
ret[k.AsString()] = json.RawMessage(vJSON)
}
return ret
}
// marshalPlannedOutputs takes a list of changes and returns a map of output
// values
func marshalPlannedOutputs(changes *plans.Changes) (map[string]output, error) {
if changes.Outputs == nil {
// No changes - we're done here!
return nil, nil
}
ret := make(map[string]output)
for _, oc := range changes.Outputs {
if oc.ChangeSrc.Action == plans.Delete {
continue
}
var after []byte
changeV, err := oc.Decode()
if err != nil {
return ret, err
}
if changeV.After != cty.NilVal {
if changeV.After.IsWhollyKnown() {
after, err = ctyjson.Marshal(changeV.After, changeV.After.Type())
if err != nil {
return ret, err
}
}
}
ret[oc.Addr.OutputValue.Name] = output{
Value: json.RawMessage(after),
Sensitive: oc.Sensitive,
}
}
return ret, nil
}
func marshalPlannedValues(changes *plans.Changes, schemas *terraform.Schemas) (module, error) {
var ret module
// build two maps:
// module name -> [resource addresses]
// module -> [children modules]
moduleResourceMap := make(map[string][]addrs.AbsResourceInstance)
moduleMap := make(map[string][]addrs.ModuleInstance)
seenModules := make(map[string]bool)
for _, resource := range changes.Resources {
// if the resource is being deleted, skip over it.
if resource.Action != plans.Delete {
containingModule := resource.Addr.Module.String()
moduleResourceMap[containingModule] = append(moduleResourceMap[containingModule], resource.Addr)
// the root module has no parents
if !resource.Addr.Module.IsRoot() {
parent := resource.Addr.Module.Parent().String()
// we expect to see multiple resources in one module, so we
// only need to report the "parent" module for each child module
// once.
if !seenModules[containingModule] {
moduleMap[parent] = append(moduleMap[parent], resource.Addr.Module)
seenModules[containingModule] = true
}
// If any given parent module has no resources, it needs to be
// added to the moduleMap. This walks through the current
// resources' modules' ancestors, taking advantage of the fact
// that Ancestors() returns an ordered slice, and verifies that
// each one is in the map.
ancestors := resource.Addr.Module.Ancestors()
for i, ancestor := range ancestors[:len(ancestors)-1] {
aStr := ancestor.String()
// childStr here is the immediate child of the current step
childStr := ancestors[i+1].String()
// we likely will see multiple resources in one module, so we
// only need to report the "parent" module for each child module
// once.
if !seenModules[childStr] {
moduleMap[aStr] = append(moduleMap[aStr], ancestors[i+1])
seenModules[childStr] = true
}
}
}
}
}
// start with the root module
resources, err := marshalPlanResources(changes, moduleResourceMap[""], schemas)
if err != nil {
return ret, err
}
ret.Resources = resources
childModules, err := marshalPlanModules(changes, schemas, moduleMap[""], moduleMap, moduleResourceMap)
if err != nil {
return ret, err
}
sort.Slice(childModules, func(i, j int) bool {
return childModules[i].Address < childModules[j].Address
})
ret.ChildModules = childModules
return ret, nil
}
// marshalPlanResources
func marshalPlanResources(changes *plans.Changes, ris []addrs.AbsResourceInstance, schemas *terraform.Schemas) ([]resource, error) {
var ret []resource
for _, ri := range ris {
r := changes.ResourceInstance(ri)
if r.Action == plans.Delete {
continue
}
resource := resource{
Address: r.Addr.String(),
Type: r.Addr.Resource.Resource.Type,
Name: r.Addr.Resource.Resource.Name,
ProviderName: r.ProviderAddr.ProviderConfig.StringCompact(),
Index: r.Addr.Resource.Key,
}
switch r.Addr.Resource.Resource.Mode {
case addrs.ManagedResourceMode:
resource.Mode = "managed"
case addrs.DataResourceMode:
resource.Mode = "data"
default:
return nil, fmt.Errorf("resource %s has an unsupported mode %s",
r.Addr.String(),
r.Addr.Resource.Resource.Mode.String(),
)
}
schema, schemaVer := schemas.ResourceTypeConfig(
r.ProviderAddr.ProviderConfig.LocalName,
r.Addr.Resource.Resource.Mode,
resource.Type,
)
if schema == nil {
return nil, fmt.Errorf("no schema found for %s", r.Addr.String())
}
resource.SchemaVersion = schemaVer
changeV, err := r.Decode(schema.ImpliedType())
if err != nil {
return nil, err
}
if changeV.After != cty.NilVal {
if changeV.After.IsWhollyKnown() {
resource.AttributeValues = marshalAttributeValues(changeV.After, schema)
} else {
knowns := omitUnknowns(changeV.After)
resource.AttributeValues = marshalAttributeValues(knowns, schema)
}
}
ret = append(ret, resource)
}
sort.Slice(ret, func(i, j int) bool {
return ret[i].Address < ret[j].Address
})
return ret, nil
}
// marshalPlanModules iterates over a list of modules to recursively describe
// the full module tree.
func marshalPlanModules(
changes *plans.Changes,
schemas *terraform.Schemas,
childModules []addrs.ModuleInstance,
moduleMap map[string][]addrs.ModuleInstance,
moduleResourceMap map[string][]addrs.AbsResourceInstance,
) ([]module, error) {
var ret []module
for _, child := range childModules {
moduleResources := moduleResourceMap[child.String()]
// cm for child module, naming things is hard.
var cm module
// don't populate the address for the root module
if child.String() != "" {
cm.Address = child.String()
}
rs, err := marshalPlanResources(changes, moduleResources, schemas)
if err != nil {
return nil, err
}
cm.Resources = rs
if len(moduleMap[child.String()]) > 0 {
moreChildModules, err := marshalPlanModules(changes, schemas, moduleMap[child.String()], moduleMap, moduleResourceMap)
if err != nil {
return nil, err
}
cm.ChildModules = moreChildModules
}
ret = append(ret, cm)
}
return ret, nil
}