terraform: deposed should trigger PostApply hook

Fixes #6327

Deposed instances weren't calling PostApply which was causing the counts
for what happened during `apply` to be wrong. This was a simple fix to
ensure we call that hook.

terraform/context_apply_test.go

@@ -465,6 +465,65 @@ func TestContext2Apply_createBeforeDestroyUpdate(t *testing.T) {
 	}
 }
 
+func TestContext2Apply_createBeforeDestroy_hook(t *testing.T) {
+	h := new(MockHook)
+	m := testModule(t, "apply-good-create-before")
+	p := testProvider("aws")
+	p.ApplyFn = testApplyFn
+	p.DiffFn = testDiffFn
+	state := &State{
+		Modules: []*ModuleState{
+			&ModuleState{
+				Path: rootModulePath,
+				Resources: map[string]*ResourceState{
+					"aws_instance.bar": &ResourceState{
+						Type: "aws_instance",
+						Primary: &InstanceState{
+							ID: "bar",
+							Attributes: map[string]string{
+								"require_new": "abc",
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	var actual []string
+	var actualLock sync.Mutex
+	h.PostApplyFn = func(n *InstanceInfo, s *InstanceState, e error) (HookAction, error) {
+		actualLock.Lock()
+		defer actualLock.Unlock()
+		actual = append(actual, n.Id)
+		return HookActionContinue, nil
+	}
+
+	ctx := testContext2(t, &ContextOpts{
+		Module: m,
+		Hooks:  []Hook{h},
+		Providers: map[string]ResourceProviderFactory{
+			"aws": testProviderFuncFixed(p),
+		},
+		State: state,
+	})
+
+	if p, err := ctx.Plan(); err != nil {
+		t.Fatalf("err: %s", err)
+	} else {
+		t.Logf(p.String())
+	}
+
+	if _, err := ctx.Apply(); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	expected := []string{"aws_instance.bar", "aws_instance.bar (deposed #0)"}
+	if !reflect.DeepEqual(actual, expected) {
+		t.Fatalf("bad: %#v", actual)
+	}
+}
+
 func TestContext2Apply_destroyComputed(t *testing.T) {
 	m := testModule(t, "apply-destroy-computed")
 	p := testProvider("aws")

terraform/hook_mock.go

@@ -20,6 +20,7 @@ type MockHook struct {
 	PostApplyError       error
 	PostApplyReturn      HookAction
 	PostApplyReturnError error
+	PostApplyFn          func(*InstanceInfo, *InstanceState, error) (HookAction, error)
 
 	PreDiffCalled bool
 	PreDiffInfo   *InstanceInfo
@@ -111,6 +112,11 @@ func (h *MockHook) PostApply(n *InstanceInfo, s *InstanceState, e error) (HookAc
 	h.PostApplyInfo = n
 	h.PostApplyState = s
 	h.PostApplyError = e
+
+	if h.PostApplyFn != nil {
+		return h.PostApplyFn(n, s, e)
+	}
+
 	return h.PostApplyReturn, h.PostApplyReturnError
 }
 

terraform/transform_deposed.go

@@ -145,6 +145,11 @@ func (n *graphNodeDeposedResource) EvalTree() EvalNode {
 					State:        &state,
 					Index:        n.Index,
 				},
+				&EvalApplyPost{
+					Info:  info,
+					State: &state,
+					Error: &err,
+				},
 				&EvalReturnError{
 					Error: &err,
 				},