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A set of common gulp tasks for front-end development.

Eccenca common gulp tasks (ecc-gulp-tasks)

A set of common gulp tasks for front-end development


Before you follow the instructions below, make sure that ecc-gulp-tasks is up to date. You may do that by running gulp doctor --self-check.

If you are sure, you want to update your environment, you can follow these steps:

  1. Find out which node packages are installed globally

    npm ls -g --depth 0
    yarn global ls
  2. Update env

    # update nvmrc and node
    bash -c "echo "6.9.4" > ~/.nvmrc"
    nvm install
    # install latest npm and yarn
    npm install --global npm@3.10.10 yarn@0.19.1
  3. Reinstall you installed with npm/yarn, for example:

    yarn global add gulp eslint ecc-license-checker

Available tasks

  • build - compiles optimized (minified, deduped) commonjs version of your component with webpack. Uses config.webpackConfig.production as basic configuration.
  • build-app - compiles optimized (minified, deduped) application with webpack. Uses config.webpackConfig.application as basic configuration.
  • debug - compiles debug version of your component with webpack, watches for changes and re-compiles when needed (until interrupted). Uses config.webpackConfig.debug as basic configuration.
  • test - runs mocha tests starting from file specified at config.testEntryPoint.
  • cover - runs istanbul to generate test coverage from file specified at config.testEntryPoint.
  • lint - runs eslint on files specified at config.lintingFiles.
  • licenses-yaml2json - generates a licenses.json from a licenses.yaml file.
  • doctor - runs several checks in the project. Some of them are fixable by running gulp doctor --heal


  • Include into your project using npm i --save-dev ecc-gulp-tasks
  • Create gulpfile.js looks like this:
var gulp = require('ecc-gulp-tasks')(require('./buildConfig.js'));
gulp.task('default', ['debug', 'serve']);

As you can see, you need to provide two arguments while requiring the package. First one is an array of string names of available tasks you wish to use. The second one is your build config (described below).

Adding custom gulp tassk

If you need to use your custom gulp tasks after including common ones, you can do it like so:

var gulp = require('ecc-gulp-tasks')(/* ... */);
// define task inline 
gulp.task('my-task', function() {
    // ... 
// load your custom tasks from external file 
// ... 

How to run things synchonously?

Normally gulp runs everything asynchronously, but sometimes you might want to run tasks in sync. That is useful for example if you want to run tests and then build a component. To do that, you can use gulp-sequence package, like so:

var gulpSequence = require('gulp-sequence');
var gulp = require('ecc-gulp-tasks')(/* ... */);
// .... 
gulp.task('deploy', gulpSequence('test', 'build-app'));

Build config

Example build config looks like this:

var path = require('path');
module.exports = {
    testEntryPoint: path.join(__dirname, 'test', 'index.jsx'),
    webpackConfig: {
        debug: require('./webpack.config.js'),
        production: require('./'),
        application: require('./'),
        common: {
            context: path.resolve(__dirname),
    licenseReport: {
        input: path.resolve(__dirname, 'license-report.yaml'),
        outputName: 'licenses.json',
        outputPath: path.resolve(__dirname, 'dist')

Exported parameters are as follows:

  • testEntryPoint - should point to your test entry point (to be run by mocha)
  • webpackConfig.debug - should include your webpack config used for debugging
  • webpackConfig.production - should include your webpack config used for compilation for production
  • webpackConfig.application - should include your webpack config used for compilation as production application. It allows for the following special parameters:
  • webpackConfig.common - may webpack config that webpackConfig.debug, webpackConfig.production and webpackConfig.application have in common
  • licenseReport - should point to a license yaml file and contain parameters for the generated license report

Javascript flags

There are the following flags set:

__WEBPACK__ is set to true while using gulp build|build-app|debug. This may be used for doing things only webpack can do, like requiring style sheets, etc:


__DEBUG__ is set to true during gulp debug. If you run gulp build-app, __DEBUG__ is set to false, effectively stripping all debug statements. This may be used for doing things only during development:

// The following block will only be run during development 
if(__DEBUG__){'Dear Developer, have a nice day')

__VERSION__ is set to 'VERSION'

If the environment variable GT_BUILD_VERSION is set, __VERSION__ will be set to that value. Otherwise it will be set to the result of git describe --always --dirty, if that does not fail.


const version = (<div>{__VERSION__}</div>);