typescript-eslint · developer-bandi · Jun 8, 2025 · Jun 8, 2025
diff --git a/.github/actions/breaking-pr-check/action.yml b/.github/actions/breaking-pr-check/action.yml
@@ -2,5 +2,68 @@ name: Validate Breaking Change PR
 description: Validate breaking change PR title and description
 
 runs:
-  using: node20
-  main: index.js
+  using: 'composite'
+  steps:
+    - name: Check PR title and body using github-script
+      uses: actions/github-script@v7
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        script: |
+          async function getPullRequest() {
+            const pr = context.payload.pull_request;
+            if (!pr) {
+              throw new Error("This action can only be run on pull_request events.");
+            }
+
+            const owner = pr.base.repo.owner.login;
+            const repo = pr.base.repo.name;
+            const pull_number = pr.number;
+
+            const { data } = await github.rest.pulls.get({
+              owner,
+              repo,
+              pull_number,
+            });
+
+            return data;
+          }
+
+          function checkTitle(title) {
+            if (/^[a-z]+(\([a-z-]+\))?!: /.test(title)) {
+              throw new Error(
+                `Do not use exclamation mark ('!') to indicate breaking change in the PR Title.`,
+              );
+            }
+          }
+
+          function checkDescription(body, labels) {
+            if (!labels.some(label => label.name === 'breaking change')) {
+              return;
+            }
+
+            const [firstLine, secondLine] = body.split(/\r?\n/);
+
+            if (!firstLine || !/^BREAKING CHANGE:/.test(firstLine)) {
+              throw new Error(
+                `Breaking change PR body should start with "BREAKING CHANGE:". See https://typescript-eslint.io/maintenance/releases#2-merging-breaking-changes.`,
+              );
+            }
+
+            if (!secondLine) {
+              throw new Error(
+                `The description of breaking change is missing. See https://typescript-eslint.io/maintenance/releases#2-merging-breaking-changes.`,
+              );
+            }
+          }
+
+          async function run() {
+            const pr = await getPullRequest();
+            checkTitle(pr.title);
+            checkDescription(pr.body ?? '', pr.labels);
+          }
+
+          try {
+            await run();
+          } catch (e) {
+            throw new Error(e.message ?? String(e));
+          }
diff --git a/.github/actions/breaking-pr-check/index.js b/.github/actions/breaking-pr-check/index.js
diff --git a/.github/workflows/semantic-breaking-change-pr.yml b/.github/workflows/semantic-breaking-change-pr.yml
@@ -15,7 +15,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: ./.github/actions/prepare-install
       - uses: ./.github/actions/breaking-pr-check
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}