gulp-if-else

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

• gulp-if
• gulp-cond

LICENSE

MIT license

Author

Nicolas Talle