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gulpfile.js
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'use strict';
/**
* Tasks:
*
* gulp prod
* Generates the library in production mode (minified).
*
* gulp dev
* Generates the library in development mode (sourcemaps enabled).
*
* gulp live
* Generates the library in development mode and watches for changes.
*
* gulp
* Alias for `gulp prod`.
*/
const fs = require('fs');
const path = require('path');
const gulp = require('gulp');
const gulpif = require('gulp-if');
const gutil = require('gulp-util');
const plumber = require('gulp-plumber');
const eslint = require('gulp-eslint');
const rename = require('gulp-rename');
const header = require('gulp-header');
const uglify = require('gulp-uglify');
const browserify = require('browserify');
const watchify = require('watchify');
const envify = require('envify/custom');
const source = require('vinyl-source-stream');
const buffer = require('vinyl-buffer');
const PKG = require('./package.json');
const BANNER = fs.readFileSync('banner.txt').toString();
const BANNER_OPTIONS =
{
pkg : PKG,
currentYear : (new Date()).getFullYear()
};
const BUILD_DIR = './dist';
// Default environment.
process.env.NODE_ENV = 'development';
function logError(error)
{
gutil.log(gutil.colors.red(String(error)));
}
function bundle(options)
{
options = options || {};
let watch = !!options.watch;
let bundler = browserify(
{
entries : path.join(__dirname, PKG.main),
extensions : [ '.js' ],
// required for sourcemaps (must be false otherwise).
debug : process.env.NODE_ENV === 'development',
// required for watchify.
cache : {},
// required for watchify.
packageCache : {},
// required to be true only for watchify.
fullPaths : watch,
standalone : 'callstatsjssip'
})
.transform('babelify',
{
presets : [ 'es2015' ],
plugins : [ 'transform-runtime' ]
})
.transform(envify(
{
NODE_ENV : process.env.NODE_ENV,
_ : 'purge'
}));
if (watch)
{
bundler = watchify(bundler);
bundler.on('update', () =>
{
let start = Date.now();
gutil.log('bundling...');
rebundle();
gutil.log('bundle took %sms', (Date.now() - start));
});
}
function rebundle()
{
return bundler.bundle()
.on('error', logError)
.pipe(source(`${PKG.name}.js`))
.pipe(buffer())
.pipe(gulpif(process.env.NODE_ENV === 'production',
uglify()
))
.pipe(gulpif(process.env.NODE_ENV === 'production',
rename(`${PKG.name}.min.js`)
))
.pipe(gulpif(process.env.NODE_ENV === 'development',
rename(`${PKG.name}.js`)
))
.pipe(header(BANNER, BANNER_OPTIONS))
.pipe(gulp.dest(BUILD_DIR));
}
return rebundle();
}
gulp.task('env:dev', (done) =>
{
gutil.log('setting "dev" environment');
process.env.NODE_ENV = 'development';
done();
});
gulp.task('env:prod', (done) =>
{
gutil.log('setting "prod" environment');
process.env.NODE_ENV = 'production';
done();
});
gulp.task('lint', () =>
{
let src = [ 'gulpfile.js', 'lib/**/*.js' ];
return gulp.src(src)
.pipe(plumber())
.pipe(eslint(
{
plugins : [ 'import' ],
extends : [ 'eslint:recommended' ],
parserOptions :
{
ecmaVersion : 6,
sourceType : 'module',
ecmaFeatures :
{
impliedStrict : true
}
},
envs :
[
'browser',
'es6',
'node',
'commonjs'
],
'rules' :
{
'no-console' : 0,
'no-undef' : 2,
'no-unused-vars' : [ 2, { vars: 'all', args: 'after-used' }],
'no-empty' : 0,
'quotes' : [ 2, 'single', { avoidEscape: true } ],
'semi' : [ 2, 'always' ],
'no-multi-spaces' : 0,
'no-whitespace-before-property' : 2,
'space-before-blocks' : 2,
'space-before-function-paren' : [ 2, 'never' ],
'space-in-parens' : [ 2, 'never' ],
'spaced-comment' : [ 2, 'always' ],
'comma-spacing' : [ 2, { before: false, after: true } ],
'jsx-quotes' : [ 2, 'prefer-single' ],
'import/extensions' : 1
}
}))
.pipe(eslint.format());
});
gulp.task('bundle', () =>
{
return bundle({ watch: false });
});
gulp.task('bundle:watch', () =>
{
return bundle({ watch: true });
});
gulp.task('watch', (done) =>
{
// Watch changes in JS files.
gulp.watch([ 'gulpfile.js', 'lib/**/*.js' ], gulp.series(
'lint'
));
done();
});
gulp.task('prod', gulp.series(
'env:prod',
'lint',
'bundle'
));
gulp.task('dev', gulp.series(
'env:dev',
'lint',
'bundle'
));
gulp.task('live', gulp.series(
'env:dev',
'lint',
'bundle:watch',
'watch'
));
gulp.task('default', gulp.series('prod'));