refactor: port is-ignored ts (#675)

* chore: add ts and jest config

* chore: add ts related deps

* refactor: port is-ignored to ts

* style: apply prettier rules

@commitlint/is-ignored/index.d.ts

@@ -0,0 +1 @@
+export * from "./lib";

@commitlint/is-ignored/index.js

@@ -0,0 +1,2 @@
+module.exports = require('./lib').default;
+module.exports.default = module.exports;

@commitlint/is-ignored/jest.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+	preset: 'ts-jest',
+	testEnvironment: 'node'
+};

@commitlint/is-ignored/package.json

@@ -2,36 +2,16 @@
   "name": "@commitlint/is-ignored",
   "version": "8.0.0",
   "description": "Lint your commit messages",
-  "main": "lib/index.js",
   "files": [
     "lib/"
   ],
   "scripts": {
-    "build": "cross-env NODE_ENV=production babel src --out-dir lib  --source-maps",
+    "build": "tsc",
     "deps": "dep-check",
     "pkg": "pkg-check",
-    "start": "concurrently \"ava -c 4 --verbose --watch\" \"yarn run watch\"",
-    "test": "ava -c 4 --verbose",
-    "watch": "babel src --out-dir lib --watch --source-maps"
-  },
-  "ava": {
-    "files": [
-      "src/**/*.test.js",
-      "!lib/**/*"
-    ],
-    "source": [
-      "src/**/*.js",
-      "!lib/**/*"
-    ],
-    "babel": "inherit",
-    "require": [
-      "babel-register"
-    ]
-  },
-  "babel": {
-    "presets": [
-      "babel-preset-commitlint"
-    ]
+    "start": "concurrently \"jest --watchAll\" \"tsc -w\"",
+    "test": "jest",
+    "watch": "tsc -w"
   },
   "engines": {
     "node": ">=4"
@@ -56,17 +36,17 @@
   },
   "license": "MIT",
   "devDependencies": {
-    "@commitlint/parse": "^8.0.0",
+    "@commitlint/parse": "8.0.0",
     "@commitlint/test": "8.0.0",
-    "@commitlint/utils": "^8.0.0",
-    "ava": "0.22.0",
-    "babel-cli": "6.26.0",
-    "babel-preset-commitlint": "^8.0.0",
-    "babel-register": "6.26.0",
+    "@commitlint/utils": "8.0.0",
+    "@types/jest": "^24.0.13",
     "concurrently": "3.5.1",
-    "cross-env": "5.1.1"
+    "jest": "^24.8.0",
+    "ts-jest": "^24.0.2",
+    "typescript": "^3.5.1"
   },
   "dependencies": {
+    "@types/semver": "^6.0.0",
     "semver": "6.1.1"
   }
 }

@commitlint/is-ignored/src/defaults.ts

@@ -0,0 +1,29 @@
+import semver from 'semver';
+
+export type Matcher = (commit: string) => boolean;
+
+const isSemver = (c: string): boolean => {
+	const firstLine = c.split('\n').shift();
+
+	if (typeof firstLine !== 'string') {
+		return false;
+	}
+
+	const stripped = firstLine.replace(/^chore(\([^)]+\))?:/, '').trim();
+	return semver.valid(stripped) !== null;
+};
+
+const test = (r: RegExp): ((c: string) => boolean) => r.test.bind(r);
+
+export const wildcards: Matcher[] = [
+	test(
+		/^((Merge pull request)|(Merge (.*?) into (.*?)|(Merge branch (.*?)))(?:\r?\n)*$)/m
+	),
+	test(/^(R|r)evert (.*)/),
+	test(/^(fixup|squash)!/),
+	isSemver,
+	test(/^Merged (.*?)(in|into) (.*)/),
+	test(/^Merge remote-tracking branch (.*)/),
+	test(/^Automatic merge(.*)/),
+	test(/^Auto-merged (.*?) into (.*)/)
+];

@commitlint/is-ignored/src/index.ts

@@ -0,0 +1,2 @@
+export * from './is-ignored';
+export {Matcher} from './defaults';