command/jsonplan: fix bug with nested modules output (#23092)
`marshalPlannedValues` builds a map of modules to their children in order to output the resource changes in a tree. The map was built from the list of resource changes. However if a module had no resources itself, and only called another module (a very normal case), that module would not get added to the map causing none of its children to be output in `planned_values`. This PR adds a walk up through a given module's ancestors to ensure that each module, even those without resources, would be added.
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@ -96,16 +96,36 @@ func marshalPlannedValues(changes *plans.Changes, schemas *terraform.Schemas) (m
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containingModule := resource.Addr.Module.String()
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moduleResourceMap[containingModule] = append(moduleResourceMap[containingModule], resource.Addr)
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// root has no parents.
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if containingModule != "" {
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// the root module has no parents
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if !resource.Addr.Module.IsRoot() {
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parent := resource.Addr.Module.Parent().String()
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// we likely will see multiple resources in one module, so we
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// we expect to see multiple resources in one module, so we
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// only need to report the "parent" module for each child module
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// once.
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if !seenModules[containingModule] {
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moduleMap[parent] = append(moduleMap[parent], resource.Addr.Module)
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seenModules[containingModule] = true
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}
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// If any given parent module has no resources, it needs to be
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// added to the moduleMap. This walks through the current
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// resources' modules' ancestors, taking advantage of the fact
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// that Ancestors() returns an ordered slice, and verifies that
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// each one is in the map.
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ancestors := resource.Addr.Module.Ancestors()
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for i, ancestor := range ancestors[:len(ancestors)-1] {
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aStr := ancestor.String()
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// childStr here is the immediate child of the current step
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childStr := ancestors[i+1].String()
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// we likely will see multiple resources in one module, so we
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// only need to report the "parent" module for each child module
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// once.
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if !seenModules[childStr] {
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moduleMap[aStr] = append(moduleMap[aStr], ancestors[i+1])
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seenModules[childStr] = true
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}
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}
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}
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}
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}
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@ -1,4 +1,7 @@
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variable "ok" {
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default = "something"
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description = "description"
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variable "test_var" {
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default = "bar-var"
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}
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resource "test_instance" "test" {
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ami = var.test_var
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}
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@ -1,9 +1,54 @@
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{
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"format_version": "0.1",
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"terraform_version": "0.12.1-dev",
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"planned_values": {
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"root_module": {}
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"root_module": {
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"child_modules": [
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{
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"address": "module.my_module",
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"child_modules": [
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{
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"resources": [
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{
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"address": "module.my_module.module.more.test_instance.test",
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"mode": "managed",
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"type": "test_instance",
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"name": "test",
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"provider_name": "test",
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"schema_version": 0,
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"values": {
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"ami": "bar-var"
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}
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}
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],
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"address": "module.my_module.module.more"
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}
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]
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}
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]
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}
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},
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"resource_changes": [
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{
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"address": "module.my_module.module.more.test_instance.test",
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"module_address": "module.my_module.module.more",
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"mode": "managed",
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"type": "test_instance",
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"name": "test",
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"provider_name": "test",
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"change": {
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"actions": [
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"create"
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],
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"before": null,
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"after": {
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"ami": "bar-var"
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},
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"after_unknown": {
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"id": true
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}
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}
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}
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],
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"configuration": {
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"root_module": {
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"module_calls": {
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@ -12,15 +57,31 @@
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"module": {
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"module_calls": {
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"more": {
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"source": "./more-modules",
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"module": {
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"resources": [
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{
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"address": "test_instance.test",
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"mode": "managed",
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"type": "test_instance",
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"name": "test",
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"provider_config_key": "more:test",
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"expressions": {
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"ami": {
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"references": [
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"var.test_var"
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]
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}
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},
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"schema_version": 0
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}
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],
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"variables": {
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"ok": {
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"default": "something",
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"description": "description"
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"test_var": {
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"default": "bar-var"
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}
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}
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},
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"source": "./more-modules"
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}
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}
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}
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}
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@ -28,4 +89,4 @@
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}
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}
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}
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}
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}
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