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cli: Refactor resource drift rendering

This commit is contained in:
Alisdair McDiarmid 2021-09-13 17:30:16 -04:00
parent c4688345a1
commit f0cf4235f9
8 changed files with 209 additions and 515 deletions
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175
internal/command/format/diff.go
View File

@ -20,6 +20,21 @@ import (
"github.com/hashicorp/terraform/internal/states"
)
// DiffLanguage controls the description of the resource change reasons.
type DiffLanguage rune
//go:generate go run golang.org/x/tools/cmd/stringer -type=DiffLanguage diff.go
const (
// DiffLanguageProposedChange indicates that the change is one which is
// planned to be applied.
DiffLanguageProposedChange DiffLanguage = 'P'
// DiffLanguageDetectedDrift indicates that the change is detected drift
// from the configuration.
DiffLanguageDetectedDrift DiffLanguage = 'D'
)
// ResourceChange returns a string representation of a change to a particular
// resource, for inclusion in user-facing plan output.
//
@ -33,6 +48,7 @@ func ResourceChange(
change *plans.ResourceInstanceChangeSrc,
schema *configschema.Block,
color *colorstring.Colorize,
language DiffLanguage,
) string {
addr := change.Addr
var buf bytes.Buffer
@ -56,7 +72,14 @@ func ResourceChange(
case plans.Read:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be read during apply\n # (config refers to values not yet known)", dispAddr)))
case plans.Update:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be updated in-place", dispAddr)))
switch language {
case DiffLanguageProposedChange:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be updated in-place", dispAddr)))
case DiffLanguageDetectedDrift:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] has changed", dispAddr)))
default:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] update (unknown reason %s)", dispAddr, language)))
}
case plans.CreateThenDelete, plans.DeleteThenCreate:
switch change.ActionReason {
case plans.ResourceInstanceReplaceBecauseTainted:
@ -67,7 +90,14 @@ func ResourceChange(
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] must be [bold][red]replaced", dispAddr)))
}
case plans.Delete:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be [bold][red]destroyed", dispAddr)))
switch language {
case DiffLanguageProposedChange:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be [bold][red]destroyed", dispAddr)))
case DiffLanguageDetectedDrift:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] has been deleted", dispAddr)))
default:
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] delete (unknown reason %s)", dispAddr, language)))
}
if change.DeposedKey != states.NotDeposed {
// Some extra context about this unusual situation.
buf.WriteString(color.Color("\n # (left over from a partially-failed replacement of this instance)"))
@ -154,147 +184,6 @@ func ResourceChange(
return buf.String()
}
// ResourceInstanceDrift returns a string representation of a change to a
// particular resource instance that was made outside of Terraform, for
// reporting a change that has already happened rather than one that is planned.
//
// The the two resource instances have equal current objects then the result
// will be an empty string to indicate that there is no drift to render.
//
// The resource schema must be provided along with the change so that the
// formatted change can reflect the configuration structure for the associated
// resource.
//
// If "color" is non-nil, it will be used to color the result. Otherwise,
// no color codes will be included.
func ResourceInstanceDrift(
addr addrs.AbsResourceInstance,
before, after *states.ResourceInstance,
schema *configschema.Block,
color *colorstring.Colorize,
) string {
var buf bytes.Buffer
if color == nil {
color = &colorstring.Colorize{
Colors: colorstring.DefaultColors,
Disable: true,
Reset: false,
}
}
dispAddr := addr.String()
action := plans.Update
switch {
case before == nil || before.Current == nil:
// before should never be nil, but before.Current can be if the
// instance was deposed. There is nothing to render for a deposed
// instance, since we intend to remove it.
return ""
case after == nil || after.Current == nil:
// The object was deleted
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] has been deleted", dispAddr)))
action = plans.Delete
default:
// The object was changed
buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] has been changed", dispAddr)))
}
buf.WriteString(color.Color("[reset]\n"))
buf.WriteString(color.Color(DiffActionSymbol(action)) + " ")
switch addr.Resource.Resource.Mode {
case addrs.ManagedResourceMode:
buf.WriteString(fmt.Sprintf(
"resource %q %q",
addr.Resource.Resource.Type,
addr.Resource.Resource.Name,
))
case addrs.DataResourceMode:
buf.WriteString(fmt.Sprintf(
"data %q %q ",
addr.Resource.Resource.Type,
addr.Resource.Resource.Name,
))
default:
// should never happen, since the above is exhaustive
buf.WriteString(addr.String())
}
buf.WriteString(" {")
p := blockBodyDiffPrinter{
buf: &buf,
color: color,
action: action,
}
// Most commonly-used resources have nested blocks that result in us
// going at least three traversals deep while we recurse here, so we'll
// start with that much capacity and then grow as needed for deeper
// structures.
path := make(cty.Path, 0, 3)
ty := schema.ImpliedType()
var err error
var oldObj, newObj *states.ResourceInstanceObject
oldObj, err = before.Current.Decode(ty)
if err != nil {
// We shouldn't encounter errors here because Terraform Core should've
// made sure that the previous run object conforms to the current
// schema by having the provider upgrade it, but we'll be robust here
// in case there are some edges we didn't find yet.
return fmt.Sprintf(" # %s previous run state doesn't conform to current schema; this is a Terraform bug\n # %s\n", addr, err)
}
if after != nil && after.Current != nil {
newObj, err = after.Current.Decode(ty)
if err != nil {
// We shouldn't encounter errors here because Terraform Core should've
// made sure that the prior state object conforms to the current
// schema by having the provider upgrade it, even if we skipped
// refreshing on this run, but we'll be robust here in case there are
// some edges we didn't find yet.
return fmt.Sprintf(" # %s refreshed state doesn't conform to current schema; this is a Terraform bug\n # %s\n", addr, err)
}
}
oldVal := oldObj.Value
var newVal cty.Value
if newObj != nil {
newVal = newObj.Value
} else {
newVal = cty.NullVal(ty)
}
if newVal.RawEquals(oldVal) {
// Nothing to show, then.
return ""
}
// We currently have an opt-out that permits the legacy SDK to return values
// that defy our usual conventions around handling of nesting blocks. To
// avoid the rendering code from needing to handle all of these, we'll
// normalize first.
// (Ideally we'd do this as part of the SDK opt-out implementation in core,
// but we've added it here for now to reduce risk of unexpected impacts
// on other code in core.)
oldVal = objchange.NormalizeObjectFromLegacySDK(oldVal, schema)
newVal = objchange.NormalizeObjectFromLegacySDK(newVal, schema)
result := p.writeBlockBodyDiff(schema, oldVal, newVal, 6, path)
if result.bodyWritten {
buf.WriteString("\n")
buf.WriteString(strings.Repeat(" ", 4))
}
buf.WriteString("}\n")
return buf.String()
}
// OutputChanges returns a string representation of a set of changes to output
// values for inclusion in user-facing plan output.
//

2
internal/command/format/diff_test.go
View File

@ -4599,7 +4599,7 @@ func runTestCases(t *testing.T, testCases map[string]testCase) {
RequiredReplace: tc.RequiredReplace,
}
output := ResourceChange(change, tc.Schema, color)
output := ResourceChange(change, tc.Schema, color, DiffLanguageProposedChange)
if diff := cmp.Diff(output, tc.ExpectedOutput); diff != "" {
t.Errorf("wrong output\n%s", diff)
}

29
internal/command/format/difflanguage_string.go Normal file
View File

@ -0,0 +1,29 @@
// Code generated by "stringer -type=DiffLanguage diff.go"; DO NOT EDIT.
package format
import "strconv"
func _() {
// An "invalid array index" compiler error signifies that the constant values have changed.
// Re-run the stringer command to generate them again.
var x [1]struct{}
_ = x[DiffLanguageProposedChange-80]
_ = x[DiffLanguageDetectedDrift-68]
}
const (
_DiffLanguage_name_0 = "DiffLanguageDetectedDrift"
_DiffLanguage_name_1 = "DiffLanguageProposedChange"
)
func (i DiffLanguage) String() string {
switch {
case i == 68:
return _DiffLanguage_name_0
case i == 80:
return _DiffLanguage_name_1
default:
return "DiffLanguage(" + strconv.FormatInt(int64(i), 10) + ")"
}
}

187
internal/command/jsonplan/plan.go
View File

@ -130,15 +130,17 @@ func Marshal(
}
// output.ResourceDrift
err = output.marshalResourceDrift(p.PrevRunState, p.PriorState, schemas)
output.ResourceDrift, err = output.marshalResourceChanges(p.DriftedResources, schemas)
if err != nil {
return nil, fmt.Errorf("error in marshalResourceDrift: %s", err)
return nil, fmt.Errorf("error in marshaling resource drift: %s", err)
}
// output.ResourceChanges
err = output.marshalResourceChanges(p.Changes, schemas)
if err != nil {
return nil, fmt.Errorf("error in marshalResourceChanges: %s", err)
if p.Changes != nil {
output.ResourceChanges, err = output.marshalResourceChanges(p.Changes.Resources, schemas)
if err != nil {
return nil, fmt.Errorf("error in marshaling resource changes: %s", err)
}
}
// output.OutputChanges
@ -188,149 +190,10 @@ func (p *plan) marshalPlanVariables(vars map[string]plans.DynamicValue, schemas
return nil
}
func (p *plan) marshalResourceDrift(oldState, newState *states.State, schemas *terraform.Schemas) error {
// Our goal here is to build a data structure of the same shape as we use
// to describe planned resource changes, but in this case we'll be
// taking the old and new values from different state snapshots rather
// than from a real "Changes" object.
//
// In doing this we make an assumption that drift detection can only
// ever show objects as updated or removed, and will never show anything
// as created because we only refresh objects we were already tracking
// after the previous run. This means we can use oldState as our baseline
// for what resource instances we might include, and check for each item
// whether it's present in newState. If we ever have some mechanism to
// detect "additive drift" later then we'll need to take a different
// approach here, but we have no plans for that at the time of writing.
//
// We also assume that both states have had all managed resource objects
// upgraded to match the current schemas given in schemas, so we shouldn't
// need to contend with oldState having old-shaped objects even if the
// user changed provider versions since the last run.
func (p *plan) marshalResourceChanges(resources []*plans.ResourceInstanceChangeSrc, schemas *terraform.Schemas) ([]resourceChange, error) {
var ret []resourceChange
if newState.ManagedResourcesEqual(oldState) {
// Nothing to do, because we only detect and report drift for managed
// resource instances.
return nil
}
for _, ms := range oldState.Modules {
for _, rs := range ms.Resources {
if rs.Addr.Resource.Mode != addrs.ManagedResourceMode {
// Drift reporting is only for managed resources
continue
}
provider := rs.ProviderConfig.Provider
for key, oldIS := range rs.Instances {
if oldIS.Current == nil {
// Not interested in instances that only have deposed objects
continue
}
addr := rs.Addr.Instance(key)
newIS := newState.ResourceInstance(addr)
schema, _ := schemas.ResourceTypeConfig(
provider,
addr.Resource.Resource.Mode,
addr.Resource.Resource.Type,
)
if schema == nil {
return fmt.Errorf("no schema found for %s (in provider %s)", addr, provider)
}
ty := schema.ImpliedType()
oldObj, err := oldIS.Current.Decode(ty)
if err != nil {
return fmt.Errorf("failed to decode previous run data for %s: %s", addr, err)
}
var newObj *states.ResourceInstanceObject
if newIS != nil && newIS.Current != nil {
newObj, err = newIS.Current.Decode(ty)
if err != nil {
return fmt.Errorf("failed to decode refreshed data for %s: %s", addr, err)
}
}
var oldVal, newVal cty.Value
oldVal = oldObj.Value
if newObj != nil {
newVal = newObj.Value
} else {
newVal = cty.NullVal(ty)
}
if oldVal.RawEquals(newVal) {
// No drift if the two values are semantically equivalent
continue
}
oldSensitive := jsonstate.SensitiveAsBool(oldVal)
newSensitive := jsonstate.SensitiveAsBool(newVal)
oldVal, _ = oldVal.UnmarkDeep()
newVal, _ = newVal.UnmarkDeep()
var before, after []byte
var beforeSensitive, afterSensitive []byte
before, err = ctyjson.Marshal(oldVal, oldVal.Type())
if err != nil {
return fmt.Errorf("failed to encode previous run data for %s as JSON: %s", addr, err)
}
after, err = ctyjson.Marshal(newVal, oldVal.Type())
if err != nil {
return fmt.Errorf("failed to encode refreshed data for %s as JSON: %s", addr, err)
}
beforeSensitive, err = ctyjson.Marshal(oldSensitive, oldSensitive.Type())
if err != nil {
return fmt.Errorf("failed to encode previous run data sensitivity for %s as JSON: %s", addr, err)
}
afterSensitive, err = ctyjson.Marshal(newSensitive, newSensitive.Type())
if err != nil {
return fmt.Errorf("failed to encode refreshed data sensitivity for %s as JSON: %s", addr, err)
}
// We can only detect updates and deletes as drift.
action := plans.Update
if newVal.IsNull() {
action = plans.Delete
}
change := resourceChange{
Address: addr.String(),
ModuleAddress: addr.Module.String(),
Mode: "managed", // drift reporting is only for managed resources
Name: addr.Resource.Resource.Name,
Type: addr.Resource.Resource.Type,
ProviderName: provider.String(),
Change: change{
Actions: actionString(action.String()),
Before: json.RawMessage(before),
BeforeSensitive: json.RawMessage(beforeSensitive),
After: json.RawMessage(after),
AfterSensitive: json.RawMessage(afterSensitive),
// AfterUnknown is never populated here because
// values in a state are always fully known.
},
}
p.ResourceDrift = append(p.ResourceDrift, change)
}
}
}
sort.Slice(p.ResourceChanges, func(i, j int) bool {
return p.ResourceChanges[i].Address < p.ResourceChanges[j].Address
})
return nil
}
func (p *plan) marshalResourceChanges(changes *plans.Changes, schemas *terraform.Schemas) error {
if changes == nil {
// Nothing to do!
return nil
}
for _, rc := range changes.Resources {
for _, rc := range resources {
var r resourceChange
addr := rc.Addr
r.Address = addr.String()
@ -349,12 +212,12 @@ func (p *plan) marshalResourceChanges(changes *plans.Changes, schemas *terraform
addr.Resource.Resource.Type,
)
if schema == nil {
return fmt.Errorf("no schema found for %s (in provider %s)", r.Address, rc.ProviderAddr.Provider)
return nil, fmt.Errorf("no schema found for %s (in provider %s)", r.Address, rc.ProviderAddr.Provider)
}
changeV, err := rc.Decode(schema.ImpliedType())
if err != nil {
return err
return nil, err
}
// We drop the marks from the change, as decoding is only an
// intermediate step to re-encode the values as json
@ -368,7 +231,7 @@ func (p *plan) marshalResourceChanges(changes *plans.Changes, schemas *terraform
if changeV.Before != cty.NilVal {
before, err = ctyjson.Marshal(changeV.Before, changeV.Before.Type())
if err != nil {
return err
return nil, err
}
marks := rc.BeforeValMarks
if schema.ContainsSensitive() {
@ -377,14 +240,14 @@ func (p *plan) marshalResourceChanges(changes *plans.Changes, schemas *terraform
bs := jsonstate.SensitiveAsBool(changeV.Before.MarkWithPaths(marks))
beforeSensitive, err = ctyjson.Marshal(bs, bs.Type())
if err != nil {
return err
return nil, err
}
}
if changeV.After != cty.NilVal {
if changeV.After.IsWhollyKnown() {
after, err = ctyjson.Marshal(changeV.After, changeV.After.Type())
if err != nil {
return err
return nil, err
}
afterUnknown = cty.EmptyObjectVal
} else {
@ -394,7 +257,7 @@ func (p *plan) marshalResourceChanges(changes *plans.Changes, schemas *terraform
} else {
after, err = ctyjson.Marshal(filteredAfter, filteredAfter.Type())
if err != nil {
return err
return nil, err
}
}
afterUnknown = unknownAsBool(changeV.After)
@ -406,17 +269,17 @@ func (p *plan) marshalResourceChanges(changes *plans.Changes, schemas *terraform
as := jsonstate.SensitiveAsBool(changeV.After.MarkWithPaths(marks))
afterSensitive, err = ctyjson.Marshal(as, as.Type())
if err != nil {
return err
return nil, err
}
}
a, err := ctyjson.Marshal(afterUnknown, afterUnknown.Type())
if err != nil {
return err
return nil, err
}
replacePaths, err := encodePaths(rc.RequiredReplace)
if err != nil {
return err
return nil, err
}
r.Change = change{
@ -444,7 +307,7 @@ func (p *plan) marshalResourceChanges(changes *plans.Changes, schemas *terraform
case addrs.DataResourceMode:
r.Mode = "data"
default:
return fmt.Errorf("resource %s has an unsupported mode %s", r.Address, addr.Resource.Resource.Mode.String())
return nil, fmt.Errorf("resource %s has an unsupported mode %s", r.Address, addr.Resource.Resource.Mode.String())
}
r.ModuleAddress = addr.Module.String()
r.Name = addr.Resource.Resource.Name
@ -461,18 +324,18 @@ func (p *plan) marshalResourceChanges(changes *plans.Changes, schemas *terraform
case plans.ResourceInstanceReplaceByRequest:
r.ActionReason = "replace_by_request"
default:
return fmt.Errorf("resource %s has an unsupported action reason %s", r.Address, rc.ActionReason)
return nil, fmt.Errorf("resource %s has an unsupported action reason %s", r.Address, rc.ActionReason)
}
p.ResourceChanges = append(p.ResourceChanges, r)
ret = append(ret, r)
}
sort.Slice(p.ResourceChanges, func(i, j int) bool {
return p.ResourceChanges[i].Address < p.ResourceChanges[j].Address
sort.Slice(ret, func(i, j int) bool {
return ret[i].Address < ret[j].Address
})
return nil
return ret, nil
}
func (p *plan) marshalOutputChanges(changes *plans.Changes) error {

1
internal/command/testdata/show-json/drift/output.json vendored
View File

@ -52,6 +52,7 @@
"id": "placeholder"
},
"after_sensitive": {},
"after_unknown": {},
"before_sensitive": {}
}
}

3
internal/command/testdata/show-json/multi-resource-update/output.json vendored
View File

@ -62,7 +62,8 @@
},
"after": null,
"before_sensitive": {},
"after_sensitive": false
"after_sensitive": false,
"after_unknown": {}
}
}
],

209
internal/command/views/operation_test.go
View File

@ -13,6 +13,7 @@ import (
"github.com/hashicorp/terraform/internal/states/statefile"
"github.com/hashicorp/terraform/internal/terminal"
"github.com/hashicorp/terraform/internal/terraform"
"github.com/zclconf/go-cty/cty"
)
func TestOperation_stopping(t *testing.T) {
@ -82,10 +83,8 @@ func TestOperation_planNoChanges(t *testing.T) {
"nothing at all in normal mode": {
func(schemas *terraform.Schemas) *plans.Plan {
return &plans.Plan{
UIMode: plans.NormalMode,
Changes: plans.NewChanges(),
PrevRunState: states.NewState(),
PriorState: states.NewState(),
UIMode: plans.NormalMode,
Changes: plans.NewChanges(),
}
},
"no differences, so no changes are needed.",
@ -93,10 +92,8 @@ func TestOperation_planNoChanges(t *testing.T) {
"nothing at all in refresh-only mode": {
func(schemas *terraform.Schemas) *plans.Plan {
return &plans.Plan{
UIMode: plans.RefreshOnlyMode,
Changes: plans.NewChanges(),
PrevRunState: states.NewState(),
PriorState: states.NewState(),
UIMode: plans.RefreshOnlyMode,
Changes: plans.NewChanges(),
}
},
"Terraform has checked that the real remote objects still match",
@ -104,148 +101,90 @@ func TestOperation_planNoChanges(t *testing.T) {
"nothing at all in destroy mode": {
func(schemas *terraform.Schemas) *plans.Plan {
return &plans.Plan{
UIMode: plans.DestroyMode,
Changes: plans.NewChanges(),
PrevRunState: states.NewState(),
PriorState: states.NewState(),
UIMode: plans.DestroyMode,
Changes: plans.NewChanges(),
}
},
"No objects need to be destroyed.",
},
"no drift to display with only deposed instances": {
// changes in deposed instances will cause a change in state, but
// have nothing to display to the user
func(schemas *terraform.Schemas) *plans.Plan {
return &plans.Plan{
UIMode: plans.NormalMode,
Changes: plans.NewChanges(),
PrevRunState: states.BuildState(func(state *states.SyncState) {
state.SetResourceInstanceDeposed(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "somewhere",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
states.NewDeposedKey(),
&states.ResourceInstanceObjectSrc{
Status: states.ObjectReady,
AttrsJSON: []byte(`{"foo": "ok", "bars":[]}`),
},
addrs.RootModuleInstance.ProviderConfigDefault(addrs.NewDefaultProvider("test")),
)
}),
PriorState: states.NewState(),
}
},
"no differences, so no changes are needed.",
},
"drift detected in normal mode": {
func(schemas *terraform.Schemas) *plans.Plan {
return &plans.Plan{
UIMode: plans.NormalMode,
Changes: plans.NewChanges(),
PrevRunState: states.BuildState(func(state *states.SyncState) {
state.SetResourceInstanceCurrent(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "somewhere",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
&states.ResourceInstanceObjectSrc{
Status: states.ObjectReady,
AttrsJSON: []byte(`{}`),
},
addrs.RootModuleInstance.ProviderConfigDefault(addrs.NewDefaultProvider("test")),
)
}),
PriorState: states.NewState(),
addr := addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "somewhere",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance)
schema, _ := schemas.ResourceTypeConfig(
addrs.NewDefaultProvider("test"),
addr.Resource.Resource.Mode,
addr.Resource.Resource.Type,
)
ty := schema.ImpliedType()
rc := &plans.ResourceInstanceChange{
Addr: addr,
PrevRunAddr: addr,
ProviderAddr: addrs.RootModuleInstance.ProviderConfigDefault(
addrs.NewDefaultProvider("test"),
),
Change: plans.Change{
Action: plans.Update,
Before: cty.NullVal(ty),
After: cty.ObjectVal(map[string]cty.Value{
"id": cty.StringVal("1234"),
"foo": cty.StringVal("bar"),
}),
},
}
},
"to update the Terraform state to match, create and apply a refresh-only plan",
},
"drift detected with deposed": {
func(schemas *terraform.Schemas) *plans.Plan {
rcs, err := rc.Encode(ty)
if err != nil {
panic(err)
}
drs := []*plans.ResourceInstanceChangeSrc{rcs}
return &plans.Plan{
UIMode: plans.NormalMode,
Changes: plans.NewChanges(),
PrevRunState: states.BuildState(func(state *states.SyncState) {
state.SetResourceInstanceCurrent(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "changes",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
&states.ResourceInstanceObjectSrc{
Status: states.ObjectReady,
AttrsJSON: []byte(`{"foo":"b"}`),
},
addrs.RootModuleInstance.ProviderConfigDefault(addrs.NewDefaultProvider("test")),
)
state.SetResourceInstanceDeposed(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "broken",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
states.NewDeposedKey(),
&states.ResourceInstanceObjectSrc{
Status: states.ObjectReady,
AttrsJSON: []byte(`{"foo":"c"}`),
},
addrs.RootModuleInstance.ProviderConfigDefault(addrs.NewDefaultProvider("test")),
)
}),
PriorState: states.BuildState(func(state *states.SyncState) {
state.SetResourceInstanceCurrent(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "changed",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
&states.ResourceInstanceObjectSrc{
Status: states.ObjectReady,
AttrsJSON: []byte(`{"foo":"b"}`),
},
addrs.RootModuleInstance.ProviderConfigDefault(addrs.NewDefaultProvider("test")),
)
state.SetResourceInstanceDeposed(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "broken",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
states.NewDeposedKey(),
&states.ResourceInstanceObjectSrc{
Status: states.ObjectReady,
AttrsJSON: []byte(`{"foo":"d"}`),
},
addrs.RootModuleInstance.ProviderConfigDefault(addrs.NewDefaultProvider("test")),
)
}),
UIMode: plans.NormalMode,
Changes: plans.NewChanges(),
DriftedResources: drs,
}
},
"to update the Terraform state to match, create and apply a refresh-only plan",
},
"drift detected in refresh-only mode": {
func(schemas *terraform.Schemas) *plans.Plan {
addr := addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "somewhere",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance)
schema, _ := schemas.ResourceTypeConfig(
addrs.NewDefaultProvider("test"),
addr.Resource.Resource.Mode,
addr.Resource.Resource.Type,
)
ty := schema.ImpliedType()
rc := &plans.ResourceInstanceChange{
Addr: addr,
PrevRunAddr: addr,
ProviderAddr: addrs.RootModuleInstance.ProviderConfigDefault(
addrs.NewDefaultProvider("test"),
),
Change: plans.Change{
Action: plans.Update,
Before: cty.NullVal(ty),
After: cty.ObjectVal(map[string]cty.Value{
"id": cty.StringVal("1234"),
"foo": cty.StringVal("bar"),
}),
},
}
rcs, err := rc.Encode(ty)
if err != nil {
panic(err)
}
drs := []*plans.ResourceInstanceChangeSrc{rcs}
return &plans.Plan{
UIMode: plans.RefreshOnlyMode,
Changes: plans.NewChanges(),
PrevRunState: states.BuildState(func(state *states.SyncState) {
state.SetResourceInstanceCurrent(
addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_resource",
Name: "somewhere",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
&states.ResourceInstanceObjectSrc{
Status: states.ObjectReady,
AttrsJSON: []byte(`{}`),
},
addrs.RootModuleInstance.ProviderConfigDefault(addrs.NewDefaultProvider("test")),
)
}),
PriorState: states.NewState(),
UIMode: plans.RefreshOnlyMode,
Changes: plans.NewChanges(),
DriftedResources: drs,
}
},
"If you were expecting these changes then you can apply this plan",

118
internal/command/views/plan.go
View File

@ -10,7 +10,6 @@ import (
"github.com/hashicorp/terraform/internal/command/arguments"
"github.com/hashicorp/terraform/internal/command/format"
"github.com/hashicorp/terraform/internal/plans"
"github.com/hashicorp/terraform/internal/states"
"github.com/hashicorp/terraform/internal/terraform"
"github.com/hashicorp/terraform/internal/tfdiags"
)
@ -97,8 +96,9 @@ func (v *PlanJSON) HelpPrompt() {
// The plan renderer is used by the Operation view (for plan and apply
// commands) and the Show view (for the show command).
func renderPlan(plan *plans.Plan, schemas *terraform.Schemas, view *View) {
haveRefreshChanges := renderChangesDetectedByRefresh(plan.PrevRunState, plan.PriorState, schemas, view)
haveRefreshChanges := len(plan.DriftedResources) > 0
if haveRefreshChanges {
renderChangesDetectedByRefresh(plan.DriftedResources, schemas, view)
switch plan.UIMode {
case plans.RefreshOnlyMode:
view.streams.Println(format.WordWrap(
@ -292,6 +292,7 @@ func renderPlan(plan *plans.Plan, schemas *terraform.Schemas, view *View) {
rcs,
rSchema,
view.colorize,
format.DiffLanguageProposedChange,
))
}
@ -344,82 +345,53 @@ func renderPlan(plan *plans.Plan, schemas *terraform.Schemas, view *View) {
// renderChangesDetectedByRefresh returns true if it produced at least one
// line of output, and guarantees to always produce whole lines terminated
// by newline characters.
func renderChangesDetectedByRefresh(before, after *states.State, schemas *terraform.Schemas, view *View) bool {
// ManagedResourceEqual checks that the state is exactly equal for all
// managed resources; but semantically equivalent states, or changes to
// deposed instances may not actually represent changes we need to present
// to the user, so for now this only serves as a short-circuit to skip
// attempting to render the diffs below.
if after.ManagedResourcesEqual(before) {
return false
}
func renderChangesDetectedByRefresh(drs []*plans.ResourceInstanceChangeSrc, schemas *terraform.Schemas, view *View) {
view.streams.Print(
view.colorize.Color("[reset]\n[bold][cyan]Note:[reset][bold] Objects have changed outside of Terraform[reset]\n\n"),
)
view.streams.Print(format.WordWrap(
"Terraform detected the following changes made outside of Terraform since the last \"terraform apply\":\n\n",
view.outputColumns(),
))
var diffs []string
for _, bms := range before.Modules {
for _, brs := range bms.Resources {
if brs.Addr.Resource.Mode != addrs.ManagedResourceMode {
continue // only managed resources can "drift"
}
addr := brs.Addr
prs := after.Resource(brs.Addr)
provider := brs.ProviderConfig.Provider
providerSchema := schemas.ProviderSchema(provider)
if providerSchema == nil {
// Should never happen
view.streams.Printf("(schema missing for %s)\n", provider)
continue
}
rSchema, _ := providerSchema.SchemaForResourceAddr(addr.Resource)
if rSchema == nil {
// Should never happen
view.streams.Printf("(schema missing for %s)\n", addr)
continue
}
for key, bis := range brs.Instances {
if bis.Current == nil {
// No current instance to render here
continue
}
var pis *states.ResourceInstance
if prs != nil {
pis = prs.Instance(key)
}
diff := format.ResourceInstanceDrift(
addr.Instance(key),
bis, pis,
rSchema,
view.colorize,
)
if diff != "" {
diffs = append(diffs, diff)
}
}
// Note: we're modifying the backing slice of this plan object in-place
// here. The ordering of resource changes in a plan is not significant,
// but we can only do this safely here because we can assume that nobody
// is concurrently modifying our changes while we're trying to print it.
sort.Slice(drs, func(i, j int) bool {
iA := drs[i].Addr
jA := drs[j].Addr
if iA.String() == jA.String() {
return drs[i].DeposedKey < drs[j].DeposedKey
}
}
return iA.Less(jA)
})
// If we only have changes regarding deposed instances, or the diff
// renderer is suppressing irrelevant changes from the legacy SDK, there
// may not have been anything to display to the user.
if len(diffs) > 0 {
view.streams.Print(
view.colorize.Color("[reset]\n[bold][cyan]Note:[reset][bold] Objects have changed outside of Terraform[reset]\n\n"),
)
view.streams.Print(format.WordWrap(
"Terraform detected the following changes made outside of Terraform since the last \"terraform apply\":\n\n",
view.outputColumns(),
for _, rcs := range drs {
if rcs.Action == plans.NoOp && !rcs.Moved() {
continue
}
providerSchema := schemas.ProviderSchema(rcs.ProviderAddr.Provider)
if providerSchema == nil {
// Should never happen
view.streams.Printf("(schema missing for %s)\n\n", rcs.ProviderAddr)
continue
}
rSchema, _ := providerSchema.SchemaForResourceAddr(rcs.Addr.Resource.Resource)
if rSchema == nil {
// Should never happen
view.streams.Printf("(schema missing for %s)\n\n", rcs.Addr)
continue
}
view.streams.Println(format.ResourceChange(
rcs,
rSchema,
view.colorize,
format.DiffLanguageDetectedDrift,
))
for _, diff := range diffs {
view.streams.Print(diff)
}
return true
}
return false
}
const planHeaderIntro = `