chore: make @aws-cdk/yargs-gen a devDependency (#32096)

`yargs-gen` used to be a runtime dependency. The only reason seemed to be that there was a factory class for `DynamicResult` types in `yargs-gen`, called `DynamicValue`.

In this PR, move the factory to the only location where it is used in the CLI itself, and turn the `import` of `yargs-gen` into an `import type`, which does not imply any runtime dependency.

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/aws-cdk/lib/config.ts

@@ -1,4 +1,4 @@
-import { CliConfig, DynamicValue } from '@aws-cdk/yargs-gen';
+import type { CliConfig, DynamicResult } from '@aws-cdk/yargs-gen';
 import { StackActivityProgress } from './api/util/cloudformation/stack-activity-monitor';
 import { RequireApproval } from './diff';
 
@@ -417,3 +417,26 @@ export function makeConfig(): CliConfig {
     },
   };
 }
+
+/**
+ * Informs the code library, `@aws-cdk/yargs-gen`, that
+ * this value references an entity not defined in this configuration file.
+ */
+export class DynamicValue {
+  /**
+   * Instructs `yargs-gen` to retrieve this value from the parameter with passed name.
+   */
+  public static fromParameter(parameterName: string): DynamicResult {
+    return {
+      dynamicType: 'parameter',
+      dynamicValue: parameterName,
+    };
+  }
+
+  public static fromInline(f: () => any): DynamicResult {
+    return {
+      dynamicType: 'function',
+      dynamicValue: f,
+    };
+  }
+}

packages/aws-cdk/package.json

@@ -70,6 +70,7 @@
   "devDependencies": {
     "@aws-cdk/cdk-build-tools": "0.0.0",
     "@aws-cdk/pkglint": "0.0.0",
+    "@aws-cdk/yargs-gen": "0.0.0",
     "@octokit/rest": "^18.12.0",
     "@types/archiver": "^5.3.4",
     "@types/fs-extra": "^9.0.13",
@@ -105,7 +106,6 @@
     "@aws-cdk/cloudformation-diff": "0.0.0",
     "@aws-cdk/cx-api": "0.0.0",
     "@aws-cdk/region-info": "0.0.0",
-    "@aws-cdk/yargs-gen": "0.0.0",
     "@aws-sdk/client-appsync": "3.632.0",
     "@aws-sdk/client-cloudformation": "3.632.0",
     "@aws-sdk/client-cloudwatch-logs": "3.632.0",

tools/@aws-cdk/yargs-gen/lib/yargs-types.ts

@@ -55,26 +55,3 @@ export interface DynamicResult {
   dynamicType: 'parameter' | 'function';
   dynamicValue: string | (() => any);
 }
-
-/**
- * Informs the code library, `@aws-cdk/yargs-gen`, that
- * this value references an entity not defined in this configuration file.
- */
-export class DynamicValue {
-  /**
-   * Instructs `yargs-gen` to retrieve this value from the parameter with passed name.
-   */
-  public static fromParameter(parameterName: string): DynamicResult {
-    return {
-      dynamicType: 'parameter',
-      dynamicValue: parameterName,
-    };
-  }
-
-  public static fromInline(f: () => any): DynamicResult {
-    return {
-      dynamicType: 'function',
-      dynamicValue: f,
-    };
-  }
-}