gulp-flatmap

gulp-flatmap

map each file in a stream into multiple files that are piped out

Install

$ npm install --save-dev gulp-flatmap

Usage

var gulp = require('gulp');
var flatmap = require('gulp-flatmap');
var uglify = require('gulp-uglify');
var path = require('path');
var concat = require('gulp-concat');

gulp.task('default', function () {
  return gulp.src('*.json')
    .pipe(flatmap(function(stream, file){
      var contents = JSON.parse(file.contents.toString('utf8'));
      //contents.files is an array
      return gulp.src(contents.files)
        //uglify each file individually
        .pipe(uglify())
        //combine the files
        .pipe(concat(path.basename(file.path)));
    }))
    .pipe(gulp.dest('dist'));
});

API

The flatmap method takes one argument, a function. This function is called once for each file piped to flatmap and is passed a stream as its first argument and the vinyl file as its second argument. The stream contains only one file.

You can optionally return a stream from the flatmap function. All the streams returned from flatmap will be combined and their contents will be emited by flatmap.

License

MIT © Marius Gundersen