gulp-rework-import/index.js

A gulp plugin for import several CSS files into a single file, Import each CSS file only once.

var gutil = require('gulp-util');
var through = require('through2');
var cssImprt = require('rework-import');
var rework = require('rework');
var path = require('path');

// Consts
var PLUGIN_NAME = 'gulp-rework-import';

module.exports = function() {
  return through.obj(function (file, enc, next) {
	  if (file.isStream()) {
		  //todo support stream 
		  this.emit('error', new gutil.PluginError(PLUGIN_NAME, 'Streaming not supported'));
		  return next();
	  }

	  if (file.isBuffer()) {
			try {
				var css = rework(file.contents.toString(enc)).use(cssImprt({ path: path.dirname(file.path) }))
				file.contents = new Buffer(css.toString(enc))
			} catch (err) {
				this.emit('error', new gutil.PluginError(PLUGIN_NAME, err, {fileName: file.path}));
			}
	  }

	  // make sure the file goes through the next gulp plugin
	  this.push(file);
	  // tell the stream engine that we are done with this file
	  next();
  })
}