core: Fix expanded condition block validation
The previous precondition/postcondition block validation implementation failed if the enclosing resource was expanded. This commit fixes this by generating appropriate placeholder instance data for the resource, depending on whether `count` or `for_each` is used.
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e543dda043
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@ -2385,3 +2385,97 @@ resource "aws_instance" "test" {
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t.Errorf("unexpected error.\ngot: %s\nshould contain: %q", got, want)
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}
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}
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func TestContext2Validate_precondition_count(t *testing.T) {
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p := testProvider("aws")
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p.GetProviderSchemaResponse = getProviderSchemaResponseFromProviderSchema(&ProviderSchema{
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ResourceTypes: map[string]*configschema.Block{
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"aws_instance": {
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Attributes: map[string]*configschema.Attribute{
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"foo": {Type: cty.String, Optional: true},
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},
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},
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},
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})
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m := testModuleInline(t, map[string]string{
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"main.tf": `
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terraform {
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experiments = [preconditions_postconditions]
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}
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locals {
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foos = ["bar", "baz"]
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}
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resource "aws_instance" "test" {
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count = 3
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foo = local.foos[count.index]
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lifecycle {
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precondition {
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condition = count.index < length(local.foos)
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error_message = "Insufficient foos."
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}
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}
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}
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`,
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})
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ctx := testContext2(t, &ContextOpts{
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Providers: map[addrs.Provider]providers.Factory{
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addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
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},
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})
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diags := ctx.Validate(m)
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if diags.HasErrors() {
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t.Fatal(diags.ErrWithWarnings())
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}
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}
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func TestContext2Validate_postcondition_forEach(t *testing.T) {
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p := testProvider("aws")
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p.GetProviderSchemaResponse = getProviderSchemaResponseFromProviderSchema(&ProviderSchema{
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ResourceTypes: map[string]*configschema.Block{
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"aws_instance": {
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Attributes: map[string]*configschema.Attribute{
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"foo": {Type: cty.String, Optional: true},
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},
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},
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},
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})
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m := testModuleInline(t, map[string]string{
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"main.tf": `
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terraform {
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experiments = [preconditions_postconditions]
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}
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locals {
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foos = toset(["bar", "baz", "boop"])
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}
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resource "aws_instance" "test" {
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for_each = local.foos
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foo = "foo"
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lifecycle {
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postcondition {
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condition = length(each.value) == 3
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error_message = "Short foo required, not \"${each.key}\"."
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}
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}
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}
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`,
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})
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ctx := testContext2(t, &ContextOpts{
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Providers: map[addrs.Provider]providers.Factory{
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addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
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},
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})
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diags := ctx.Validate(m)
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if diags.HasErrors() {
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t.Fatal(diags.ErrWithWarnings())
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}
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}
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@ -9,6 +9,8 @@ import (
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"github.com/hashicorp/terraform/internal/configs"
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"github.com/hashicorp/terraform/internal/configs/configschema"
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"github.com/hashicorp/terraform/internal/didyoumean"
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"github.com/hashicorp/terraform/internal/instances"
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"github.com/hashicorp/terraform/internal/lang"
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"github.com/hashicorp/terraform/internal/providers"
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"github.com/hashicorp/terraform/internal/provisioners"
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"github.com/hashicorp/terraform/internal/tfdiags"
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@ -41,17 +43,7 @@ func (n *NodeValidatableResource) Path() addrs.ModuleInstance {
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func (n *NodeValidatableResource) Execute(ctx EvalContext, op walkOperation) (diags tfdiags.Diagnostics) {
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diags = diags.Append(n.validateResource(ctx))
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var self addrs.Referenceable
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switch {
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case n.Config.Count != nil:
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self = n.Addr.Resource.Instance(addrs.IntKey(0))
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case n.Config.ForEach != nil:
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self = n.Addr.Resource.Instance(addrs.StringKey(""))
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default:
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self = n.Addr.Resource.Instance(addrs.NoKey)
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}
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diags = diags.Append(validateCheckRules(ctx, n.Config.Preconditions, nil))
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diags = diags.Append(validateCheckRules(ctx, n.Config.Postconditions, self))
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diags = diags.Append(n.validateCheckRules(ctx, n.Config))
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if managed := n.Config.Managed; managed != nil {
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hasCount := n.Config.Count != nil
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@ -478,14 +470,69 @@ func (n *NodeValidatableResource) validateResource(ctx EvalContext) tfdiags.Diag
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return diags
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}
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func validateCheckRules(ctx EvalContext, crs []*configs.CheckRule, self addrs.Referenceable) tfdiags.Diagnostics {
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func (n *NodeValidatableResource) evaluateExpr(ctx EvalContext, expr hcl.Expression, wantTy cty.Type, self addrs.Referenceable, keyData instances.RepetitionData) (cty.Value, tfdiags.Diagnostics) {
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var diags tfdiags.Diagnostics
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for _, cr := range crs {
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_, conditionDiags := ctx.EvaluateExpr(cr.Condition, cty.Bool, self)
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refs, refDiags := lang.ReferencesInExpr(expr)
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diags = diags.Append(refDiags)
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scope := ctx.EvaluationScope(self, keyData)
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hclCtx, moreDiags := scope.EvalContext(refs)
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diags = diags.Append(moreDiags)
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result, hclDiags := expr.Value(hclCtx)
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diags = diags.Append(hclDiags)
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return result, diags
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}
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func (n *NodeValidatableResource) validateCheckRules(ctx EvalContext, config *configs.Resource) tfdiags.Diagnostics {
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var diags tfdiags.Diagnostics
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keyData := EvalDataForNoInstanceKey
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selfAddr := n.ResourceAddr().Resource.Instance(addrs.NoKey)
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if n.Config.Count != nil {
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// For a resource that has count, we allow count.index but don't
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// know at this stage what it will return.
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keyData = InstanceKeyEvalData{
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CountIndex: cty.UnknownVal(cty.Number),
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}
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// "self" can't point to an unknown key, but we'll force it to be
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// key 0 here, which should return an unknown value of the
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// expected type since none of these elements are known at this
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// point anyway.
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selfAddr = n.ResourceAddr().Resource.Instance(addrs.IntKey(0))
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} else if n.Config.ForEach != nil {
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// For a resource that has for_each, we allow each.value and each.key
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// but don't know at this stage what it will return.
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keyData = InstanceKeyEvalData{
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EachKey: cty.UnknownVal(cty.String),
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EachValue: cty.DynamicVal,
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}
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// "self" can't point to an unknown key, but we'll force it to be
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// key "" here, which should return an unknown value of the
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// expected type since none of these elements are known at
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// this point anyway.
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selfAddr = n.ResourceAddr().Resource.Instance(addrs.StringKey(""))
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}
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for _, cr := range config.Preconditions {
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_, conditionDiags := n.evaluateExpr(ctx, cr.Condition, cty.Bool, nil, keyData)
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diags = diags.Append(conditionDiags)
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_, errorMessageDiags := ctx.EvaluateExpr(cr.ErrorMessage, cty.String, self)
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_, errorMessageDiags := n.evaluateExpr(ctx, cr.ErrorMessage, cty.Bool, nil, keyData)
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diags = diags.Append(errorMessageDiags)
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}
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for _, cr := range config.Postconditions {
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_, conditionDiags := n.evaluateExpr(ctx, cr.Condition, cty.Bool, selfAddr, keyData)
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diags = diags.Append(conditionDiags)
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_, errorMessageDiags := n.evaluateExpr(ctx, cr.ErrorMessage, cty.Bool, selfAddr, keyData)
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diags = diags.Append(errorMessageDiags)
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}
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