ci: automate homebrew tap updates

Author: luckfunc

.github/workflows/main.yml

@@ -35,3 +35,44 @@ jobs:
       - run: node -v
       - run: npm -v
       - run: npm publish --provenance
+
+  update-homebrew-tap:
+    needs: publish-npm
+    if: startsWith(github.ref, 'refs/tags/v')
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    env:
+      TAP_REPO: luckfunc/homebrew-tap
+      FORMULA_PATH: Formula/kill-port-process-cli.rb
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24
+      - name: Resolve release version
+        run: |
+          VERSION="${GITHUB_REF_NAME#v}"
+          echo "VERSION=$VERSION" >> "$GITHUB_ENV"
+          echo "TARBALL_URL=https://registry.npmjs.org/kill-port-process-cli/-/kill-port-process-cli-$VERSION.tgz" >> "$GITHUB_ENV"
+      - name: Compute tarball sha256
+        run: |
+          curl -fsSL "$TARBALL_URL" -o package.tgz
+          echo "SHA256=$(shasum -a 256 package.tgz | awk '{print $1}')" >> "$GITHUB_ENV"
+      - name: Clone tap repository
+        env:
+          HOMEBREW_TAP_GITHUB_TOKEN: ${{ secrets.HOMEBREW_TAP_GITHUB_TOKEN }}
+        run: |
+          git clone "https://x-access-token:${HOMEBREW_TAP_GITHUB_TOKEN}@github.com/${TAP_REPO}.git" ../homebrew-tap
+      - name: Update formula
+        run: |
+          node scripts/update-homebrew-formula.js "../homebrew-tap/${FORMULA_PATH}" "$VERSION" "$SHA256"
+      - name: Commit and push formula update
+        working-directory: ../homebrew-tap
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add "${FORMULA_PATH}"
+          git diff --cached --quiet && exit 0
+          git commit -m "chore: bump kill-port-process-cli to ${VERSION}"
+          git push origin HEAD:main

scripts/update-homebrew-formula.js

@@ -0,0 +1,26 @@
+#!/usr/bin/env node
+
+const fs = require('fs');
+
+const [, , formulaPath, version, sha256] = process.argv;
+
+if (!formulaPath || !version || !sha256) {
+  console.error('Usage: node scripts/update-homebrew-formula.js <formulaPath> <version> <sha256>');
+  process.exit(1);
+}
+
+const packageName = 'kill-port-process-cli';
+const tarballUrl = `https://registry.npmjs.org/${packageName}/-/${packageName}-${version}.tgz`;
+
+const formula = fs.readFileSync(formulaPath, 'utf8');
+const nextFormula = formula
+  .replace(/url "https:\/\/registry\.npmjs\.org\/kill-port-process-cli\/-\/kill-port-process-cli-[^"]+\.tgz"/, `url "${tarballUrl}"`)
+  .replace(/sha256 "[^"]+"/, `sha256 "${sha256}"`);
+
+if (formula === nextFormula) {
+  console.log(`Formula already points to ${version}`);
+  process.exit(0);
+}
+
+fs.writeFileSync(formulaPath, nextFormula);
+console.log(`Updated formula to ${version}`);