infra: add CI step to detect generate script diffs (#1405)

2 files changed, 101 insertions, 0 deletions

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a05df2ec..61750b54 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -203,3 +203,56 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true
+
+  check-code-generation:
+    runs-on: ubuntu-latest
+    name: 'Check Code Generation: node-18, ubuntu-latest'
+    permissions:
+      pull-requests: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Install pnpm
+        uses: pnpm/[email protected]
+        with:
+          version: 7
+
+      - name: Set node version to 18
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          cache: 'pnpm'
+
+      - name: Install deps
+        run: pnpm install
+        env:
+          CYPRESS_INSTALL_BINARY: 0
+
+      - name: Generate code
+        run: |
+          pnpm run generate:locales
+          pnpm run generate:api-docs
+
+      - name: Check diff
+        id: diff
+        run: |
+          git add .
+          git diff --cached --exit-code
+        continue-on-error: true
+
+      - name: Transpile ts
+        run: pnpm exec tsc .github/workflows/commentCodeGeneration.ts --outDir .github/workflows
+
+      - name: Comment
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const script = require('${{ github.workspace }}/.github/workflows/commentCodeGeneration.js')
+            await script(github, context, ${{ steps.diff.outcome == 'success' }})
+
+      - name: Status
+        if: ${{ steps.diff.outcome == 'failure' }}
+        run: exit 1
diff --git a/.github/workflows/commentCodeGeneration.ts b/.github/workflows/commentCodeGeneration.ts
new file mode 100644
index 00000000..715854cd
--- /dev/null
+++ b/.github/workflows/commentCodeGeneration.ts
@@ -0,0 +1,48 @@
+import type { context as ctx, GitHub } from '@actions/github/lib/utils';
+
+/**
+ * Notifies the PR about uncommitted changes generated by the `generate:*` commands.
+ *
+ * This script is used by github-script
+ * https://github.com/actions/github-script
+ *
+ * @param github A pre-authenticated octokit/rest.js client with pagination plugins
+ * @param context An object containing the context of the workflow run
+ * @param isSuccess A boolean indicating whether the workflow was successful
+ */
+module.exports = async (
+  github: InstanceType<typeof GitHub>,
+  context: typeof ctx,
+  isSuccess: boolean
+) => {
+  const { data: comments } = await github.rest.issues.listComments({
+    owner: context.repo.owner,
+    repo: context.repo.repo,
+    issue_number: context.issue.number,
+  });
+
+  const body = `Uncommitted changes were detected after runnning <code>generate:*</code> commands.\nPlease run <code>pnpm run generate:locales</code> and <code>pnpm run generate:api-docs</code> to generate/update the related files, and commit them.`;
+
+  const botComment = comments.find(
+    (comment) => comment.user?.type === 'Bot' && comment.body?.includes(body)
+  );
+
+  if (isSuccess) {
+    if (!botComment) return;
+    await github.rest.issues.deleteComment({
+      owner: context.repo.owner,
+      repo: context.repo.repo,
+      comment_id: botComment.id,
+    });
+    return;
+  }
+
+  if (!botComment) {
+    await github.rest.issues.createComment({
+      issue_number: context.issue.number,
+      owner: context.repo.owner,
+      repo: context.repo.repo,
+      body,
+    });
+  }
+};