Add common source code to projen drift check triggers

.projenrc.ts

@@ -94,7 +94,7 @@ testGithubWorkflow.addJobs({
   build: {...job([npmRunJobStep('build')]), needs: ['lint', 'test', 'typecheck']},
 })
 
-new ProjenDriftCheckWorkflow(project.github!, {})
+new ProjenDriftCheckWorkflow(project.github!, {additionalPaths: ['src/common/**']})
 
 const createReleaseGithubWorkflow = project.github!.addWorkflow('create-release')
 

src/common/github/__tests__/index.ts

@@ -236,6 +236,20 @@ describe('GitHub utils', () => {
       })
     })
 
+    test('allows setting additional paths to trigger the workflow', () => {
+      const additionalPaths = ['some/additional/path', 'another/additional/path']
+      const project = new TestProject()
+      const paths = ['.projenrc.js', ...additionalPaths]
+      new ProjenDriftCheckWorkflow(project.github!, {additionalPaths})
+      const snapshot = synthSnapshot(project)
+      const workflow = YAML.parse(snapshot[workflowPath])
+
+      expect(workflow.on).toEqual({
+        pull_request: {paths, types: ['opened', 'synchronize']},
+        push: {paths, branches: ['main']},
+      })
+    })
+
     test('allows to be run on pushes to specified branches', () => {
       const project = new TestProject()
       const branches = ['main', 'dev']

src/common/github/projen-drift-check-workflow.ts

@@ -25,6 +25,12 @@ export interface ProjenDriftCheckOptions
    * @default ['main']
    */
   readonly triggerOnPushToBranches?: Array<string>
+
+  /**
+   * By default the check runs only on projenrc file changes.
+   * This option allows adding paths that trigger the check.
+   */
+  readonly additionalPaths?: string[]
 }
 
 /**
@@ -41,7 +47,8 @@ export class ProjenDriftCheckWorkflow extends Component {
 
     const workflowName = 'projen-drift-check'
     const workingDirectory = options.outdir
-    const paths = [ProjenrcFile.of(project)!.filePath]
+    const additionalPaths = options.additionalPaths ?? []
+    const paths = [ProjenrcFile.of(project)!.filePath, ...additionalPaths]
     const workflow = githubInstance.addWorkflow(workflowName)
     const branches = options.triggerOnPushToBranches ?? ['main']
     const nodeVersion = options.workflowNodeVersion ?? project.package.minNodeVersion