From e8ca1d926e508e85f4ef38c23e4c7eff3d76a2e0 Mon Sep 17 00:00:00 2001
From: Kyle Adams <kyleadams@netflix.com>
Date: Fri, 20 Mar 2026 09:55:01 -0700
Subject: [PATCH] add support for changes to computed arrays and maps

---
 array_attribute.go         |  2 +-
 map_attribute.go           |  2 +-
 parse_test.go              | 65 ++++++++++++++++++++++++++++++++++++++
 test/computedobject.stdout | 24 ++++++++++++++
 4 files changed, 91 insertions(+), 2 deletions(-)
 create mode 100644 test/computedobject.stdout

diff --git a/array_attribute.go b/array_attribute.go
index 9751a0c..c8e9711 100644
--- a/array_attribute.go
+++ b/array_attribute.go
@@ -27,7 +27,7 @@ func IsArrayAttributeChangeLine(line string) bool {
 
 // IsArrayAttributeTerminator returns true if the line is "]" or "] -> null"
 func IsArrayAttributeTerminator(line string) bool {
-	return strings.TrimSuffix(strings.TrimSpace(line), " -> null") == "]"
+	return strings.TrimSuffix(strings.TrimSpace(line), " -> null") == "]" || strings.TrimSuffix(strings.TrimSpace(line), " -> (known after apply)") == "]"
 }
 
 // IsOneLineEmptyArrayAttribute returns true if the line ends with a "[]"
diff --git a/map_attribute.go b/map_attribute.go
index 7adc817..76fc14b 100644
--- a/map_attribute.go
+++ b/map_attribute.go
@@ -24,7 +24,7 @@ func IsMapAttributeChangeLine(line string) bool {
 
 // IsMapAttributeTerminator returns true if the line is a "}" or "},"
 func IsMapAttributeTerminator(line string) bool {
-	return strings.TrimSuffix(strings.TrimSuffix(strings.TrimSpace(line), ","), " -> null") == "}"
+	return strings.TrimSuffix(strings.TrimSuffix(strings.TrimSpace(line), ","), " -> null") == "}" || strings.TrimSuffix(strings.TrimSuffix(strings.TrimSpace(line), ","), " -> (known after apply)") == "}"
 }
 
 // IsOneLineEmptyMapAttribute returns true if the line ends with a "{}"
diff --git a/parse_test.go b/parse_test.go
index f42b1e1..15cf29f 100644
--- a/parse_test.go
+++ b/parse_test.go
@@ -242,6 +242,71 @@ func TestParse(t *testing.T) {
 				},
 			},
 		},
+		"computedmap": {
+			file: "test/computedobject.stdout",
+			expected: []*ResourceChange{
+				&ResourceChange{
+					Address:       "module.my-project.google_project_services.gcp_enabled_services[0]",
+					ModuleAddress: "module.my-project",
+					Type:          "google_project_services",
+					Name:          "gcp_enabled_services",
+					Index:         0,
+					UpdateType:    UpdateInPlaceResource,
+					AttributeChanges: []attributeChange{
+						&AttributeChange{
+							Name:       "disable_on_destroy",
+							OldValue:   false,
+							NewValue:   true,
+							UpdateType: UpdateInPlaceResource,
+						},
+						&AttributeChange{
+							Name:       "id",
+							OldValue:   "my-project",
+							NewValue:   "test",
+							UpdateType: UpdateInPlaceResource,
+						},
+						&AttributeChange{
+							Name:       "project",
+							OldValue:   "my-project",
+							NewValue:   "test2",
+							UpdateType: UpdateInPlaceResource,
+						},
+						&ArrayAttributeChange{
+							Name: "computed_services",
+							AttributeChanges: []attributeChange{
+								&AttributeChange{
+									OldValue:   "appengine.googleapis.com",
+									NewValue:   nil,
+									UpdateType: DestroyResource,
+								},
+								&AttributeChange{
+									OldValue:   "audit.googleapis.com",
+									NewValue:   nil,
+									UpdateType: DestroyResource,
+								},
+							},
+							UpdateType: UpdateInPlaceResource,
+						},
+						&MapAttributeChange{
+							Name: "computed_tags",
+							AttributeChanges: []attributeChange{
+								&AttributeChange{
+									Name:       "key1",
+									OldValue:   "old",
+									NewValue:   "new",
+									UpdateType: UpdateInPlaceResource,
+								},
+							},
+							UpdateType: UpdateInPlaceResource,
+						},
+						&MapAttributeChange{
+							Name:       "timeouts",
+							UpdateType: UpdateInPlaceResource,
+						},
+					},
+				},
+			},
+		},
 		"nested map": {
 			file: "test/nestedmap.stdout",
 			expected: []*ResourceChange{
diff --git a/test/computedobject.stdout b/test/computedobject.stdout
new file mode 100644
index 0000000..4c2f081
--- /dev/null
+++ b/test/computedobject.stdout
@@ -0,0 +1,24 @@
+------------------------------------------------------------------------
+
+An execution plan has been generated and is shown below.
+Resource actions are indicated with the following symbols:
+  ~ update in-place
+
+Terraform will perform the following actions:
+
+  # module.my-project.google_project_services.gcp_enabled_services[0] will be updated in-place
+  ~ resource "google_project_services" "gcp_enabled_services" {
+      ~ disable_on_destroy = false -> true
+      ~ id                 = "my-project" -> "test"
+      ~ project            = "my-project" -> "test2"
+      ~ computed_services           = [
+          - "appengine.googleapis.com",
+          - "audit.googleapis.com",
+        ] -> (known after apply)
+      ~ computed_tags              = {
+          ~ key1    = "old" -> "new"
+        } -> (known after apply)
+      ~ timeouts {}
+    }
+
+Plan: 0 to add, 0 to change, 1 to destroy.
\ No newline at end of file