gulp-if-env

A gulp plugin to conditionally run tasks for one or more environments.

Installation

Install the plugin using npm:

$ npm install gulp-if-env

Basic usage

Require in gulpfile.js

var ifEnv = require('gulp-if-env');

And use in your gulp tasks as such:

gulp.task('my-task', function () {
    return gulp
        .src('src/index.html')
        .pipe(ifEnv('production', myProductionTask()))
        .pipe(gulp.dest('public/'));
});

Want to run a task on all but one environment? Use not:

gulp.task('my-task', function () {
    return gulp
        .src('src/index.html')
        .pipe(ifEnv.not('development', nonDevelopmentTask()))
        .pipe(gulp.dest('public/'));
});

Or want to specify specific environments? No problem! Just use the includes function:

gulp.task('my-task', function () {
    return gulp
        .src('src/index.html')
        .pipe(ifEnv.includes('production', 'staging', myProductionTask()))
        .pipe(gulp.dest('public/'));
});

API

[main function]

There are three main interfaces to the main function:

ifEnv(); // Returns current environment
ifEnv('production'); // Returns `true` for production, `false` for other
ifEnv('production', myGulpTask()); // Returns `myGulpTask` stream for production, otherwise no-op

.not([environment], [gulpStream])

There are two main interfaces to the not() function:

ifEnv.not('production'); // Returns `true` in production, `false` for others
ifEnv.not('production', myGulpTask()); // Returns `myGulpTask` stream for production, otherwise no-op

.includes([environment1], [environment2], [...more...], [gulpStream])

There are two main interfaces to the includes() function:

ifEnv.includes('production', 'staging'); // Returns `true` in production and staging, `false` for others
ifEnv.includes('production', 'staging', myGulpTask()); // Returns `myGulpTask` stream for production and staging, otherwise no-op

.excludes([environment1], [environment2], [...more...], [gulpStream])

There are two main interfaces to the excludes() function:

ifEnv.excludes('production', 'staging'); // Returns `false` in production and staging, `true` for others
ifEnv.excludes('production', 'staging', myGulpTask()); // Returns no-op in production and staging, `myGulpTask` for others

.set(environment)

Sets a new environment if a change is required, or if your environment is specified somewhere other than NODE_ENV or as env CLI argument

ifEnv.set('staging');
ifEnv('production'); // Returns false
ifEnv('staging'); // Returns true

.reset()

Resets to default (NODE_ENV or env CLI argument)

ifEnv.set('staging');
ifEnv('staging'); // Returns true
ifEnv.reset();
ifEnv('staging'); // Returns false
ifEnv('development'); // Returns true

Issues/contribution

Feel free to create an issue or pull request if you see something amiss. Thanks!