[Gulp plugin] Conditional task with "if" callback and "else" callback (optional) : gulp.src(source).pipe( ifElse(condition, ifCallback, elseCallback) )
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README.md

gulp-if-else

Actual version published on NPM Dependencies npm module downloads per month

A plugin for Gulp, allows conditional task, with "if" callback and "else" callback (optional).

Install

npm install gulp-if-else

Usage

ifElse(condition, ifCallback [, elseCallback])

var ifElse = require('gulp-if-else');

// your code ...

gulp.src(source)
  .pipe( ifElse(condition, ifCallback, elseCallback) )

Works as a basic condition.

To understand the logic, ifElse is equivalent to

if(condition) {

  // condition is truthy

  return ifCallback();
}else{

  // condition is falsy

  // if "elseCallback" is provided
  if(elseCallback) {
    return elseCallback();
  }

  // if not "elseCallback" returns the stream
  return stream;
}

Examples

gulp.task('css', function() {

  gulp.src('./public/css/*.css')
    .pipe(ifElse(process.env.NODE_ENV === 'production',

      // called if "NODE_ENV" is "production"
      minifyCSS,

      // called if "NODE_ENV" is "not" "production" (else)
      function() {
        return minifyCSS({debug: true});
    }))
    .pipe(gulp.dest('./dist/css'))
});

gulp.task('js', function() {

  var isDev = process.env.NODE_ENV === 'development';

  gulp.src('./public/js/app.js')
    .pipe(browserify())

    // here, "uglify" (function) is called only if "isDev" is "true"
    .pipe(ifElse(isDev, uglify))
    .pipe(gulp.dest('./dist/js'))
});

Unit tests

gulp-if-else is unit tested with Unit.js

Run the tests

cd node_modules/gulp-if-else

npm test

Other conditional plugins for Gulp

LICENSE

MIT license

Author

Nicolas Tallefourtane - Nicolab.net
Nicolas Talle
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