refactor(travis-cli): port travis-cli to typescript (#990)

* refactor(travis-cli): port travis-cli to typescript

* chore: fix formatting

@commitlint/travis-cli/cli.js

@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+require('./lib/cli');

@commitlint/travis-cli/package.json

@@ -3,25 +3,15 @@
   "version": "11.0.0",
   "description": "Lint all relevant commits for a change or PR on Travis CI",
   "files": [
-    "lib/"
+    "lib/",
+    "cli.js"
   ],
   "bin": {
-    "commitlint-travis": "./lib/cli.js"
+    "commitlint-travis": "./cli.js"
   },
   "scripts": {
-    "build": "cross-env NODE_ENV=production babel src --out-dir lib --source-maps",
     "deps": "dep-check",
-    "pkg": "pkg-check --skip-main",
-    "start": "yarn run watch",
-    "watch": "babel src --out-dir lib --watch --source-maps"
-  },
-  "babel": {
-    "presets": [
-      "babel-preset-commitlint"
-    ],
-    "ignore": [
-      "**/*.test.js"
-    ]
+    "pkg": "pkg-check --skip-main"
   },
   "engines": {
     "node": ">=v10.22.1"
@@ -45,15 +35,10 @@
   },
   "license": "MIT",
   "devDependencies": {
-    "@babel/cli": "7.12.10",
-    "@babel/core": "7.12.10",
     "@commitlint/test": "^11.0.0",
-    "@commitlint/utils": "^11.0.0",
-    "babel-preset-commitlint": "^11.0.0",
-    "cross-env": "7.0.3"
+    "@commitlint/utils": "^11.0.0"
   },
   "dependencies": {
-    "@babel/runtime": "^7.11.2",
     "@commitlint/cli": "^11.0.0",
     "execa": "^5.0.0"
   },

@commitlint/travis-cli/src/cli.test.js → @commitlint/travis-cli/src/cli.test.ts

@@ -1,14 +1,14 @@
 import execa from 'execa';
 import {git} from '@commitlint/test';
 
-const bin = require.resolve('../lib/cli.js');
+const bin = require.resolve('../cli.js');
 
 const TRAVIS_COMMITLINT_BIN = require.resolve('../fixtures/commitlint');
 const TRAVIS_COMMITLINT_GIT_BIN = require.resolve('../fixtures/git');
 
 const validBaseEnv = {
-	TRAVIS: true,
-	CI: true,
+	TRAVIS: 'true',
+	CI: 'true',
 	TRAVIS_COMMIT: 'TRAVIS_COMMIT',
 	TRAVIS_COMMITLINT_BIN: TRAVIS_COMMITLINT_BIN,
 	TRAVIS_COMMITLINT_GIT_BIN: TRAVIS_COMMITLINT_GIT_BIN,
@@ -18,7 +18,7 @@ const validBaseEnv = {
 	TRAVIS_PULL_REQUEST_SLUG: 'TRAVIS_PULL_REQUEST_SLUG',
 };
 
-const cli = async (config = {}, args = []) => {
+const cli = async (config: execa.Options = {}, args: string[] = []) => {
 	try {
 		return await execa(bin, args, config);
 	} catch (err) {
@@ -28,8 +28,8 @@ const cli = async (config = {}, args = []) => {
 
 test('should throw when not on travis ci', async () => {
 	const env = {
-		CI: false,
-		TRAVIS: false,
+		CI: 'false',
+		TRAVIS: 'false',
 	};
 
 	await expect(cli({env})).rejects.toThrow(
@@ -39,8 +39,8 @@ test('should throw when not on travis ci', async () => {
 
 test('should throw when on travis ci, but env vars are missing', async () => {
 	const env = {
-		TRAVIS: true,
-		CI: true,
+		TRAVIS: 'true',
+		CI: 'true',
 	};
 
 	await expect(cli({env})).rejects.toThrow(
@@ -131,7 +131,7 @@ test('should call git with extra expected args on pull_request', async () => {
 	]);
 });
 
-function getInvocations(stdout) {
+function getInvocations(stdout: string): string[][] {
 	const matches = stdout.match(/[^[\]]+/g);
 	const raw = Array.isArray(matches) ? matches : [];
 

@commitlint/travis-cli/src/cli.js → @commitlint/travis-cli/src/cli.ts

@@ -1,10 +1,9 @@
-#!/usr/bin/env node
 import execa from 'execa';
-import commitlint from '@commitlint/cli';
 
 // Allow to override used bins for testing purposes
 const GIT = process.env.TRAVIS_COMMITLINT_GIT_BIN || 'git';
-const COMMITLINT = process.env.TRAVIS_COMMITLINT_BIN;
+const COMMITLINT =
+	process.env.TRAVIS_COMMITLINT_BIN || require('@commitlint/cli');
 
 const REQUIRED = [
 	'TRAVIS_COMMIT',
@@ -14,7 +13,7 @@ const REQUIRED = [
 	'TRAVIS_PULL_REQUEST_SLUG',
 ];
 
-const COMMIT = process.env.TRAVIS_COMMIT;
+const COMMIT = process.env.TRAVIS_COMMIT || '';
 const REPO_SLUG = process.env.TRAVIS_REPO_SLUG;
 const PR_SLUG = process.env.TRAVIS_PULL_REQUEST_SLUG || REPO_SLUG;
 const RANGE = process.env.TRAVIS_COMMIT_RANGE;
@@ -36,7 +35,7 @@ async function main() {
 		() => fetch({name: 'base', url: `https://github.com/${REPO_SLUG}.git`}),
 		IS_PR
 			? () => fetch({name: 'source', url: `https://github.com/${PR_SLUG}.git`})
-			: async () => {},
+			: () => Promise.resolve(),
 	]);
 
 	// Restore stashed changes if any
@@ -54,11 +53,14 @@ async function main() {
 	}
 }
 
-async function git(args, options) {
-	return execa(GIT, args, Object.assign({}, {stdio: 'inherit'}, options));
+async function git(args: string[], options: execa.Options = {}) {
+	return execa(GIT, args, {
+		stdio: 'inherit',
+		...options,
+	});
 }
 
-async function fetch({name, url}) {
+async function fetch({name, url}: {name: string; url: string}) {
 	await git(['remote', 'add', name, url]);
 	await git(['fetch', name, '--quiet']);
 }
@@ -70,28 +72,23 @@ async function isClean() {
 	return !(result.stdout && result.stdout.trim());
 }
 
-async function lint(args, options) {
-	return execa(
-		COMMITLINT || commitlint,
-		args,
-		Object.assign({}, {stdio: ['pipe', 'inherit', 'inherit']}, options)
-	);
+async function lint(args: string[], options: execa.Options = {}) {
+	return execa(COMMITLINT, args, {
+		stdio: ['pipe', 'inherit', 'inherit'],
+		...options,
+	});
 }
 
-async function log(hash) {
-	const result = await execa(GIT, [
-		'log',
-		'-n',
-		'1',
-		'--pretty=format:%B',
-		hash,
-	]);
+async function log(hash: string) {
+	const result = await git(['log', '-n', '1', '--pretty=format:%B', hash], {
+		stdio: 'pipe',
+	});
 	return result.stdout;
 }
 
 async function stash() {
 	if (await isClean()) {
-		return async () => {};
+		return () => Promise.resolve();
 	}
 	await git(['stash', '-k', '-u', '--quiet']);
 	return () => git(['stash', 'pop', '--quiet']);

@commitlint/travis-cli/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../../tsconfig.shared.json",
+  "compilerOptions": {
+    "composite": true,
+    "rootDir": "./src",
+    "outDir": "./lib"
+  },
+  "include": ["./src"],
+  "exclude": ["./src/**/*.test.ts", "./lib/**/*"]
+}

tsconfig.json

@@ -19,6 +19,7 @@
     {"path": "@commitlint/rules"},
     {"path": "@commitlint/lint"},
     {"path": "@commitlint/core"},
-    {"path": "@commitlint/cli"}
+    {"path": "@commitlint/cli"},
+    {"path": "@commitlint/travis-cli"}
   ]
 }