feat: Add linter for PR title using built-in package

.github/workflows/prlint.yml

@@ -0,0 +1,35 @@
+name: 📝 Lint PR title
+on:
+  pull_request:
+    types: [opened, edited, reopened, synchronize]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 🔖Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: 📦Setup PNPM
+        uses: pnpm/action-setup@v2
+        with:
+          version: 8
+      - name: 🌳Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: 20
+          cache: pnpm
+
+      - name: 🛠️Install dependencies from lockfile
+        run: pnpm install --frozen-lockfile
+
+      - name: 🧾Print versions
+        run: |
+          git --version
+          node --version
+          pnpm --version
+          pnpm commitlint --version
+
+      - name: 📝Validate PR title with commitlint
+        uses: ./packages/commitlint

.gitignore

@@ -1,6 +1,9 @@
 # dist
 dist
 
+# commited dist files
+!packages/commitlint/dist
+
 # dependencies
 node_modules
 

eslint.config.js

@@ -14,6 +14,7 @@ export default antfu(
 			'**/dist',
 			'.idea',
 			'**/__fixtures__',
+			'eslint.config.js',
 			'packages/conventionalsets-action',
 		],
 		overrides: {

package.json

@@ -29,6 +29,7 @@
 		"@antfu/eslint-config": "^1.1.0",
 		"@changesets/cli": "^2.26.2",
 		"@commitlint/cli": "^18.2.0",
+		"@commitlint/config-conventional": "^18.1.0",
 		"@vitest/coverage-v8": "^0.34.6",
 		"eslint": "^8.53.0",
 		"husky": "^8.0.3",

packages/commitlint/action.yml

@@ -0,0 +1,9 @@
+name: Commitlint (prlint)
+author: Kevin Taeyoon Jin <[email protected]>
+description: Ensure PR title match commitlint config
+runs:
+  using: node20
+  main: dist/index.cjs
+branding:
+  icon: git-pull-request
+  color: green

packages/commitlint/dist/index.cjs

@@ -0,0 +1,96 @@
+'use strict';
+
+var github = require('@actions/github');
+var core = require('@actions/core');
+var process = require('process');
+var fs = require('fs');
+var load = require('@commitlint/load');
+var lint = require('@commitlint/lint');
+
+function _interopDefault (e) { return e && e.__esModule ? e : { default: e }; }
+
+function _interopNamespace(e) {
+  if (e && e.__esModule) return e;
+  var n = Object.create(null);
+  if (e) {
+    Object.keys(e).forEach(function (k) {
+      if (k !== 'default') {
+        var d = Object.getOwnPropertyDescriptor(e, k);
+        Object.defineProperty(n, k, d.get ? d : {
+          enumerable: true,
+          get: function () { return e[k]; }
+        });
+      }
+    });
+  }
+  n.default = e;
+  return Object.freeze(n);
+}
+
+var github__namespace = /*#__PURE__*/_interopNamespace(github);
+var process__default = /*#__PURE__*/_interopDefault(process);
+var fs__namespace = /*#__PURE__*/_interopNamespace(fs);
+var load__default = /*#__PURE__*/_interopDefault(load);
+var lint__default = /*#__PURE__*/_interopDefault(lint);
+
+// src/index.ts
+function handleError(err, fail = true) {
+  if (err instanceof Error) {
+    core.error(err);
+    fail && core.setFailed(err.message);
+  } else {
+    const message = typeof err == "string" ? err : "Unknown error has occurred!";
+    core.error(message);
+    fail && core.setFailed(message);
+  }
+}
+var errHandle_default = handleError;
+
+// src/log.ts
+var SEPARATOR = "=====================";
+function logWithTile(title, content) {
+  return `${title}
+${SEPARATOR}
+${content}`;
+}
+var log_default = logWithTile;
+
+// src/lint.ts
+var defaultConfig = {
+  extends: "@commitlint/config-conventional"
+};
+function getLintOptions(configuration) {
+  var _a;
+  return {
+    defaultIgnores: configuration.defaultIgnores ? configuration.defaultIgnores : true,
+    ignores: configuration.ignores ? configuration.ignores : void 0,
+    parserOpts: typeof ((_a = configuration.parserPreset) == null ? void 0 : _a.parserOpts) == "object" ? configuration.parserPreset.parserOpts : void 0,
+    plugins: configuration.plugins ? configuration.plugins : void 0,
+    helpUrl: configuration.helpUrl ? configuration.helpUrl : void 0
+  };
+}
+async function verifyTitle(title, configPath = "") {
+  const commitlintConfig = fs__namespace.existsSync(configPath) ? await load__default.default({}, { file: configPath, cwd: process__default.default.cwd() }) : await load__default.default(defaultConfig);
+  const linterResult = await lint__default.default(title, commitlintConfig.rules, getLintOptions(commitlintConfig));
+  if (linterResult.valid) {
+    return true;
+  } else {
+    const errors = linterResult.errors.map((error2) => {
+      return `${error2.name}: ${error2.message}`;
+    }).join("\n");
+    throw new Error(log_default("Commitlint check failed!", errors));
+  }
+}
+
+// src/index.ts
+async function run() {
+  const pullRequestPayload = github__namespace.context.payload.pull_request;
+  if (!(pullRequestPayload == null ? void 0 : pullRequestPayload.title))
+    throw new Error("Pull Request or Title not found!");
+  const pullRequestObject = {
+    title: pullRequestPayload.title,
+    number: pullRequestPayload.number
+  };
+  await verifyTitle(pullRequestObject.title, "commitlint.config.js");
+}
+run().catch(errHandle_default);

packages/commitlint/dist/index.js

@@ -0,0 +1,68 @@
+import * as github from '@actions/github';
+import { error, setFailed } from '@actions/core';
+import process from 'process';
+import * as fs from 'fs';
+import load from '@commitlint/load';
+import lint from '@commitlint/lint';
+
+// src/index.ts
+function handleError(err, fail = true) {
+  if (err instanceof Error) {
+    error(err);
+    fail && setFailed(err.message);
+  } else {
+    const message = typeof err == "string" ? err : "Unknown error has occurred!";
+    error(message);
+    fail && setFailed(message);
+  }
+}
+var errHandle_default = handleError;
+
+// src/log.ts
+var SEPARATOR = "=====================";
+function logWithTile(title, content) {
+  return `${title}
+${SEPARATOR}
+${content}`;
+}
+var log_default = logWithTile;
+
+// src/lint.ts
+var defaultConfig = {
+  extends: "@commitlint/config-conventional"
+};
+function getLintOptions(configuration) {
+  var _a;
+  return {
+    defaultIgnores: configuration.defaultIgnores ? configuration.defaultIgnores : true,
+    ignores: configuration.ignores ? configuration.ignores : void 0,
+    parserOpts: typeof ((_a = configuration.parserPreset) == null ? void 0 : _a.parserOpts) == "object" ? configuration.parserPreset.parserOpts : void 0,
+    plugins: configuration.plugins ? configuration.plugins : void 0,
+    helpUrl: configuration.helpUrl ? configuration.helpUrl : void 0
+  };
+}
+async function verifyTitle(title, configPath = "") {
+  const commitlintConfig = fs.existsSync(configPath) ? await load({}, { file: configPath, cwd: process.cwd() }) : await load(defaultConfig);
+  const linterResult = await lint(title, commitlintConfig.rules, getLintOptions(commitlintConfig));
+  if (linterResult.valid) {
+    return true;
+  } else {
+    const errors = linterResult.errors.map((error2) => {
+      return `${error2.name}: ${error2.message}`;
+    }).join("\n");
+    throw new Error(log_default("Commitlint check failed!", errors));
+  }
+}
+
+// src/index.ts
+async function run() {
+  const pullRequestPayload = github.context.payload.pull_request;
+  if (!(pullRequestPayload == null ? void 0 : pullRequestPayload.title))
+    throw new Error("Pull Request or Title not found!");
+  const pullRequestObject = {
+    title: pullRequestPayload.title,
+    number: pullRequestPayload.number
+  };
+  await verifyTitle(pullRequestObject.title, "commitlint.config.js");
+}
+run().catch(errHandle_default);

packages/commitlint/src/lint.ts

@@ -3,6 +3,7 @@ import * as fs from 'node:fs';
 import type { LintOptions, ParserOptions, QualifiedConfig } from '@commitlint/types';
 import load from '@commitlint/load';
 import lint from '@commitlint/lint';
+import { setOutput } from '@actions/core';
 import logWithTile from './log';
 
 const defaultConfig = {
@@ -44,6 +45,7 @@ export async function verifyTitle(title: string, configPath: string = ''): Promi
 	const linterResult = await lint(title, commitlintConfig.rules, getLintOptions(commitlintConfig));
 
 	if (linterResult.valid) {
+		setOutput('✅ Commitlint tests passed!\n', linterResult);
 		return true;
 	}
 	else {

tsconfig.json

@@ -22,6 +22,5 @@
 		"noUnusedParameters": true,
 		"forceConsistentCasingInFileNames": true
 	},
-	"include": ["src"],
-	"exclude": ["node_modules", "dist"]
+	"exclude": ["node_modules", "**/dist"]
 }