feat: support typescript (#48)

* feat: convert to typescript

* fix: remove prettier and stick with eslint

* test: unit test node-which error flow

* test: unit test child_process spawn flow

* test: improve unit test and eslint

* chore: support coveralls with tap

* chore: tap coverage-check off and add lint to travis

* chore: travis set dist to focal

* chore: travis set after_success

* docs: update README.md

.eslintrc

@@ -0,0 +1,6 @@
+{
+  "extends": ["@antfu", "plugin:import/recommended", "plugin:import/typescript"],
+  "rules": {
+    "import/order": ["error", {"newlines-between": "always-and-inside-groups"}]
+  }
+}

.gitignore

@@ -44,8 +44,10 @@ jspm_packages
 *.tgz
 
 /.idea
-/lib/
+lib/
 build/
 
 # OS
 .DS_Store
+
+test/yarn.lock

.npmignore

@@ -1,4 +1,5 @@
 .*
 test/
-/src/
-/coverage
+coverage/
+.nyc_output
+src/

.travis.yml

@@ -1,14 +1,17 @@
 sudo: false
+dist: focal
 language: node_js
 node_js:
-  - '10'
-  - '12'
   - '14'
+  - '16'
+  - '18'
 cache:
   directories:
     - node_modules
 install:
-  - yarn install
+  - yarn install --immutable --immutable-cache --check-cache
 script:
+  - yarn lint
   - yarn test
+after_success:
   - yarn coveralls

README.md

@@ -11,7 +11,7 @@
 Because we <img alt="emoji=heart" src="https://github.com/warapitiya/assets/blob/master/heart-emoji.png?raw=true" width="15"> Yarn!</p>
 
 <p align="center">
-  <a href="https://travis-ci.org/warapitiya/gulp-yarn"><img alt="Travis Status" src="https://travis-ci.org/warapitiya/gulp-yarn.svg?branch=master"></a>
+  <a href="https://travis-ci.com/warapitiya/gulp-yarn"><img alt="Travis Status" src="https://travis-ci.org/warapitiya/gulp-yarn.svg?branch=master"></a>
   <a href='https://coveralls.io/github/warapitiya/gulp-yarn?branch=master'><img src='https://coveralls.io/repos/github/warapitiya/gulp-yarn/badge.svg?branch=master' alt='Coverage Status' /></a>
   <a href="https://www.npmjs.com/package/gulp-yarn"><img src="https://img.shields.io/npm/v/gulp-yarn.svg" alt="npm version"></a>
   <a href="https://www.npmjs.com/package/gulp-yarn"><img src="https://img.shields.io/npm/dt/gulp-yarn.svg" alt="npm downloads"></a>
@@ -20,9 +20,15 @@ Because we <img alt="emoji=heart" src="https://github.com/warapitiya/assets/blob
 
 ---
 
-## Installation
+### SUPPORT
 
-**SUPPORT:** v3 only support Nodejs `>= v10`.
+| node-version | gulp-yarn |
+|--------------|-----------|
+| \>= v14      | v4        |
+| \>= v10      | v3        |
+| Older        | v1        |
+
+## Install
 
 ```bash
 # npm
@@ -32,15 +38,15 @@ $ npm install gulp-yarn --save-dev
 $ yarn add gulp-yarn -D
 ```
 
-## Quick Start
+## Usage
 
 **BASIC:** Better performance when in same directory.
 
 ```javascript
 var gulp = require('gulp');
 var yarn = require('gulp-yarn');
 
-gulp.task('yarn', function () {
+gulp.task('yarn', function() {
   return gulp.src(['./package.json'])
     .pipe(yarn());
 });
@@ -53,7 +59,7 @@ gulp.task('yarn', function () {
 var gulp = require('gulp');
 var yarn = require('gulp-yarn');
 
-gulp.task('yarn', function () {
+gulp.task('yarn', function() {
   return gulp.src(['./package.json', './yarn.lock'])
     .pipe(gulp.dest('./dist'))
     .pipe(yarn({
@@ -64,19 +70,19 @@ gulp.task('yarn', function () {
 
 ## Options
 
-| Option        | Description                                                                                                                                                            | Type    |
-|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
-| production    | Using the `--production` flag, or when the NODE_ENV environment variable is set to production, Yarn will not install any package listed in devDependencies.            | Boolean |
-| dev           | Yarn will only install listed devDependencies.                                                                                                                         | Boolean |
-| flat          | Only allow one version of a package. On the first run this will prompt you to choose a single version for each package that is depended on at multiple version ranges. | Boolean |
-| force         | This refetches all packages, even ones that were previously installed.                                                                                                 | Boolean |
-| ignoreEngines | Ignore all the required engines force by some packages.                                                                                                                | Boolean |
-| noBinLinks    | None of `node_module` bin links getting created.                                                                                                                       | Boolean |
-| noProgress    | Disable progress bar                                                                                                                                                   | Boolean |
-| noLockfile    | Don't read or generate a lockfile                                                                                                                                      | Boolean |
-| ignoreScripts | Don't run npm scripts during installation                                                                                                                              | Boolean |
-| nonInteractive| Using the '--non-interactive' flag of yarn to avoid that during the resolution (yarn install) a user input is needed. [2770](https://github.com/yarnpkg/yarn/pull/2770)| Boolean | 
-| args          | Pass any argument with `--` to execute with yarn                                                                                                                       | String/Array |
+| Option         | Description                                                                                                                                                             | Type         |
+|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------|
+| production     | Using the `--production` flag, or when the NODE_ENV environment variable is set to production, Yarn will not install any package listed in devDependencies.             | Boolean      |
+| dev            | Yarn will only install listed devDependencies.                                                                                                                          | Boolean      |
+| flat           | Only allow one version of a package. On the first run this will prompt you to choose a single version for each package that is depended on at multiple version ranges.  | Boolean      |
+| force          | This refetches all packages, even ones that were previously installed.                                                                                                  | Boolean      |
+| ignoreEngines  | Ignore all the required engines force by some packages.                                                                                                                 | Boolean      |
+| noBinLinks     | None of `node_module` bin links getting created.                                                                                                                        | Boolean      |
+| noProgress     | Disable progress bar                                                                                                                                                    | Boolean      |
+| noLockfile     | Don't read or generate a lockfile                                                                                                                                       | Boolean      |
+| ignoreScripts  | Don't run npm scripts during installation                                                                                                                               | Boolean      |
+| nonInteractive | Using the '--non-interactive' flag of yarn to avoid that during the resolution (yarn install) a user input is needed. [2770](https://github.com/yarnpkg/yarn/pull/2770) | Boolean      | 
+| args           | Pass any argument with `--` to execute with yarn                                                                                                                        | String/Array |
 
 ## Test