gulp-predefined-tasks

This project provides several common used tasks for Gulp.

It has built-in support for: Babel, React, Webpack 2 (HMR, Tree Shaking), Mocha and more.

Getting Started (Yarn)

1. create project

  yarn init

1. add Yarn / NPM packages

  yarn add -D cross-env gulp babel-register
  yarn add -D gulp-predefined-tasks

Please install react-hot-loader@3.0.0-beta.6 if you want to use HMR with React.

1. add gulpfile.babel.js

  import registerTasks from 'gulp-predefined-tasks';

  let options = {
    // several options
  };
  registerTasks(gulp, options);

1. edit package.json to add scripts

  "scripts": {
    "build": "gulp",
    "build:dev": "cross-env NODE_ENV=development gulp build:dev",
    "build:prod": "cross-env NODE_ENV=production gulp build:prod",
    "build:watch": "cross-env NODE_ENV=watch gulp build:watch",
    "clean": "gulp clean",
    "test": "gulp test",
    "test:watch": "gulp test:watch",
    "webpack:dev": "cross-env NODE_ENV=development gulp webpack:dev",
    "webpack:prod": "cross-env NODE_ENV=production gulp webpack:prod",
    "start": "cross-env NODE_ENV=watch gulp webpack:watch"
  },

1. add .babelrc

To support Tree Shaking feature, we should add two .babelrc files.

In root folder:

  {
    "presets": ["es2015", "react", "stage-0"]
  }

In srcDir folder:

  {
    "presets": [
      ["es2015", { "modules": false }],
      "stage-0",
      "react"
    ],
    "env": {
      "watch": {
        "plugins": [
          "react-hot-loader/babel",
        ],
      },
      "test": {
        "presets": ["es2015", "react", "stage-0"]
      }
    }
  }

Options

  {
    type: 'web',
    srcDir: './src/',
    testDir: './test/',
    libDir: './lib/',
    distDir: './dist/',
    babel: { ... },
    webpack: { ... }
  }

type: String

Project type.

• web (default)
  • Standalone web app
• lib
  • NPM package

srcDir: String

The folder to store source code files.

Default: ./src/

testDir: String

The folder to store test code files.

Default: ./test/

libDir: String

The folder to store published artifacts.

Default: ./lib/

distDir: String

The folder to store published distribution artifacts.

Default: ./dist/

babel: Object

The default Babel configuration.

Default: { presets: ["es2015", "react", "stage-0"] }

webpack: bool or Object

Webpack configuration. Or set to false to disable webpack.

Default: false

  {
    entry: String or Array or Object,

    config: String or Object,             // default config file
    devConfig: String or Object,          // merge with `config` for `webpack:dev`
    prodConfig: String or Object,         // merge with `config` for `webpack:prod`
    watchConfig: String or Object,        // merge with `config` for `webpack:watch`

    babel: Object,

    devServer: {
      host: String,                       // default: 0.0.0.0
      port: bool,                         // default: 3000
      hot: bool,                          // default: true
      contentBase: bool or Object,
      proxy: Object,
      ...
    },

    onMerge: function,                    // merge all config objects
    onEntry: function,                    // rewrite entry item
    onConfig: function,                   // handle merged config object
  }

config / devConfig / prodConfig / watchConfig

It could be webpack config file path, or webpack config object.

babel: Object

Babel options object.

Default: { presets: [["es2015", { modules: false }], "react", "stage-0"] }

devServer: Object

The options object of WebpackDevServer.

onMerge: (mode, object, sources) => Object

• mode (String): The runtime mode: dev, prod or watch.
• object (Object): The destination object.
• sources (...Object): The source objects.

As default, it will concat any array values.

onEntry: (mode, entry) => String or Array

• mode (String): The runtime mode: dev, prod or watch.
• entry (String or Array): The value of entry.

onConfig: (mode, config) => Object

• mode (String): The runtime mode: dev, prod or watch.
• config (Object): The merged config object.

Extensions

Minimize images

To support gulp-imagemin, we should add gulp-imagemin to devDependencies. To support image-webpack-loader, we should add image-webpack-loader to devDependencies.

CLI arguments

The following argument could be set via CLI.

• --libDir <path>
  • Overwrite the value of options.srcDir
• --distDir <path>
  • Overwrite the value of options.distDir
• --outputFilename <filename>
  • Overwrite the value of options.webpack.config.output.filename
• --port <port>
  • Overwrite the value of options.webpack.devServer.port
• --proxy <target>
  • Overwrite the value of options.webpack.devServer.proxy.'/'.target
• --recursive or -R
  • [Incubating]
  • Check all dependencies (with file: and link: prefix) from dependencies and linkDependencies, and execute same tasks in them.

For example:

  # Customize the libDir in runtime
  yarn run build:dev -- --libDir <NEW_LIB_DIR>

  # Run build:dev for all projects
  cd ./example/app
  yarn run build:dev -- --recursive

Tasks

Developer may overwrite the following tasks to fit their needs.

help

Show all tasks.

build:dev

Build project in dev mode.

• For lib project, it will run build:lib and webpack:dev.
• For web project, it will run webpack:dev.

build:prod

Build project in prod mode.

• For lib project, it will run webpack:prod.
• For web project, it will run webpack:prod.

build:lib

Build project as library.

It will generate several artifacts in dev mode.

build:dist

Build project as distribution.

It will generate several artifacts in prod mode.

watch / watch:lib

Watch project, and build as library.

It depends on build:lib.

webpack:dev

Run webpack to bundle artifacts in dev mode.

webpack:prod

Run webpack to bundle artifacts in prod mode.

webpack:watch

Run webpack to bundle artifacts in watch mode.

lint / lint:watch

Lint source codes using ESLint.

test / test:watch

Run tests by using Mocha.

Known Issues

• Yarn
  • Yarn ignore .npmignore when publishing artifacts
    • https://github.com/yarnpkg/yarn/issues/685
    • https://github.com/yarnpkg/yarn/issues/754
• Webpack UglifyJsPlugin
  • Unable to drop unused React component
    • UglifyJS warning: Side effects in initialization of unused variable XxxReactComponent
• Webpack less-loader
  • Unable to resolve module error when working with css-loader?modules=true
    • https://github.com/webpack-contrib/less-loader/issues/109