fix(cdktf): support dot-seperated nested accessors

Closes #3420

packages/cdktf/lib/terraform-provisioner.ts

@@ -353,7 +353,10 @@ export interface RemoteExecProvisioner {
  */
 export class TerraformSelf {
   private static getInterpolation(key: string) {
-    return `self.${snakeCase(key)}`;
+    return `self.${key
+      .split(".")
+      .map((s) => snakeCase(s))
+      .join(".")}`;
   }
 
   /**

packages/cdktf/test/__snapshots__/terraform-provisioner.test.ts.snap

@@ -0,0 +1,43 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`self with  1`] = `
+"{
+  "provider": {
+    "test": [
+      {
+      }
+    ]
+  },
+  "resource": {
+    "test_resource": {
+      "bar": {
+        "name": "test",
+        "provisioner": [
+          {
+            "local-exec": {
+              "command": "say 'hello world'",
+              "environment": {
+                "ECR_IMAGE_COMMAND": "delete",
+                "ECR_IMAGE_SOURCE_IMAGE": "\${self.triggers_replace.source_image}",
+                "ECR_IMAGE_TARGET_IMAGE": "\${self.image_name_with_hash}",
+                "ECR_IMAGE_TARGET_REGION": "\${self.triggers_replace.target_region}"
+              },
+              "interpreter": [
+                "bash"
+              ],
+              "when": "destroy"
+            }
+          }
+        ]
+      }
+    }
+  },
+  "terraform": {
+    "required_providers": {
+      "test": {
+        "version": "~> 2.0"
+      }
+    }
+  }
+}"
+`;

packages/cdktf/test/terraform-provisioner.test.ts

@@ -0,0 +1,35 @@
+// Copyright (c) HashiCorp, Inc
+// SPDX-License-Identifier: MPL-2.0
+import { Testing, TerraformStack, TerraformSelf } from "../lib";
+import { TestResource } from "./helper";
+import { TestProvider } from "./helper/provider";
+
+test("self with ", () => {
+  const app = Testing.app();
+  const stack = new TerraformStack(app, "test");
+  new TestProvider(stack, "foo", {});
+  new TestResource(stack, "bar", {
+    name: "test",
+    provisioners: [
+      {
+        when: "destroy",
+        type: "local-exec",
+        environment: {
+          ECR_IMAGE_COMMAND: "delete",
+          ECR_IMAGE_SOURCE_IMAGE: TerraformSelf.getString(
+            "triggers_replace.sourceImage"
+          ),
+          ECR_IMAGE_TARGET_IMAGE: TerraformSelf.getString(
+            "image_name_with_hash"
+          ),
+          ECR_IMAGE_TARGET_REGION: TerraformSelf.getString(
+            "triggers_replace.target_region"
+          ),
+        },
+        interpreter: ["bash"],
+        command: "say 'hello world'",
+      },
+    ],
+  });
+  expect(Testing.synth(stack)).toMatchSnapshot();
+});