label workflow

Author: danez

.github/scripts/create-changeset-from-pr.mjs

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+#!/usr/bin/env node
+import { mkdir, readdir, rm, writeFile } from 'node:fs/promises';
+import path from 'node:path';
+import process from 'node:process';
+import { fileURLToPath } from 'node:url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const repoRoot = path.resolve(__dirname, '..', '..');
+const changesetDir = path.join(repoRoot, '.changeset');
+
+const prNumber = process.env.PR_NUMBER?.trim() ?? 'unknown';
+const prTitle = process.env.PR_TITLE?.trim() ?? '';
+const prBody = process.env.PR_BODY?.trim() ?? '';
+const labelName = process.env.LABEL_NAME?.trim().toLowerCase() ?? '';
+
+if (!prTitle) {
+  console.error('PR title is required.');
+  process.exit(1);
+}
+
+if (!['add-changeset', 'add-changeset-major'].includes(labelName)) {
+  console.log(`Skipping changeset creation because label ${labelName || 'unknown'} was not handled.`);
+  process.exit(0);
+}
+
+const message = [prTitle, prBody].filter(Boolean).join('\n');
+
+let releaseType = 'patch';
+
+if (labelName === 'add-changeset-major') {
+  releaseType = 'major';
+} else if (/^(feat|feature)(\([^)]+\))?!?:/i.test(message)) {
+  releaseType = 'minor';
+} else if (/^(fix|perf|refactor|build|ci|chore|docs|style|test|revert)(\([^)]+\))?!?:/i.test(message)) {
+  releaseType = 'patch';
+} else if (/\bbreaking change\b|!:/i.test(message)) {
+  releaseType = 'major';
+}
+
+const fileName = `pr-${prNumber}.md`;
+const filePath = path.join(changesetDir, fileName);
+
+const existingFiles = await readdir(changesetDir);
+await Promise.all(
+  existingFiles
+    .filter((name) => name.startsWith(`pr-${prNumber}`) && name.endsWith('.md'))
+    .map((name) => rm(path.join(changesetDir, name), { force: true }))
+);
+
+const packages = ["react-docgen", "react-docgen-cli"];
+const frontmatter = packages.map((pkg) => `"${pkg}": ${releaseType}`).join('\n');
+const content = `---\n${frontmatter}\n---\n\n${prTitle}\n`;
+
+await mkdir(changesetDir, { recursive: true });
+await writeFile(filePath, content, 'utf8');
+
+console.log(`Created changeset ${path.relative(repoRoot, filePath)} with release type ${releaseType}.`);

.github/workflows/add-changeset-on-label.yml

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+name: Add changeset from PR label
+
+on:
+  pull_request_target:
+    types:
+      - labeled
+
+permissions:
+  contents: write
+  pull-requests: read
+
+jobs:
+  create-changeset:
+    if: github.event.label.name == 'add-changeset' || github.event.label.name == 'add-changeset-major'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout PR branch
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
+          ref: ${{ github.event.pull_request.head.ref }}
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4
+        with:
+          node-version: 22
+
+      - name: Create changeset file
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          PR_TITLE: ${{ github.event.pull_request.title }}
+          PR_BODY: ${{ github.event.pull_request.body }}
+          LABEL_NAME: ${{ github.event.label.name }}
+        run: node .github/scripts/create-changeset-from-pr.mjs
+
+      - name: Commit changeset
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add .changeset
+          if git diff --cached --quiet; then
+            echo "No changeset changes to commit."
+            exit 0
+          fi
+          git commit -m "Add changeset for PR #${{ github.event.pull_request.number }}"
+          git push origin HEAD:${{ github.event.pull_request.head.ref }}