Grunt gzip task

grunt-gzip.js

var fs = require("fs"),
  path = require("path");

var common = require("./lib/common");

module.exports = function(grunt) {
	var Ss = grunt.config("Ss"),
		_ = grunt.util._,
		async = grunt.util.async;

	grunt.registerMultiTask("gzip", function() {

		var done = this.async(),
			// Get the options for the destination directory
			opts = this.options({batchLimit: 10}),
			// Get the list of files to gzip and copy
			files = this.filesSrc;

		// Build up a list of source -> dest mappings
		var mappings = _.map(files, function(file) {
			// Destination is the destination directory + whatever directory the file is in (css or js) + the file name.
			var destDir = path.basename(path.dirname(file)),
				destFile = path.basename(file),
				dest = path.join(opts.dest, destDir, destFile);
			
			return {
				src: file,
				dest: dest
			};
		});

		// A little wrapper for calling common.compressFile with the proper this context.
		var gzipFile = function(mapping, cb) {
			common.compressFile(mapping.src, mapping.dest, cb);
		};

		// Run the common.compressFileMapping for each mapping, with a limit of 10 by default.
		async.forEachLimit(mappings, opts.batchLimit, gzipFile, function(err, destFilePaths) {
			if(err) {
				grunt.fatal("Error during gzip: " + err.message);
				return done(false);
			}

			done(true);
		});
	});
};