build-icons.js

module.exports = function(grunt) {
	'use strict';
	var path = require('path');

	grunt.registerMultiTask('build-icons', 'Collect font icons by common.deps.js and build font', function() {
		var options = this.options({
			block: 'icon',
			mod: 'font',
			origin: 'svg',
			ext: '.svg',
			webfont: {
				font: 'icon_font',
				hashes: false,
				startCodepoint: 0x00c4,
				templateOptions: {
					baseClass: 'icon',
					classPrefix: 'icon_',
					mixinPrefix: 'icon-'
				}
			},
			copy: {
				process: function (content) {
					return content.replace(
						/url\((.*?)\)/g, 'url(get-abs-url($1))'
					).replace(
						/url\(get-abs-url\("(.*)\?#(.*)"\)\)/g,
						"url(s('%s?#$2', unquote(get-abs-url('$1'))))"
					);
				}
			}
		});
		var cwd = process.cwd();
		var targetName = [this.name, this.target].join('_');
		this.files.forEach(function(file) {
			var deps = file.src.reduce(function(deps, filePath) {
				var splitPath = filePath.split(path.sep);
				var bundlePath = splitPath.slice(0, splitPath.length - 2).join(path.sep);
				var levelsDir = [cwd, bundlePath, '.bem'].join(path.sep);
				var levelsPath = [levelsDir, 'levelPaths.js'].join(path.sep);
				var levels = require(levelsPath).levels.map(function(level) {
					return path.resolve(levelsDir, level);
				});
				return deps.concat(require([cwd, filePath].join(path.sep)).deps.filter(function(dep) {
					return dep.block == options.block && dep.mod == options.mod && dep.val;
				})).map(function(dep) {
					dep.levels = levels;
					return dep;
				});

			}, []);

			var iconList = deps.reduce(function(iconList, dep) {
				var iconPath = dep.levels.reduce(function(lastPath, levelPath) {
					var iconPath = path.join(levelPath, dep.block, '_' + dep.mod, options.origin, dep.val + options.ext);
					if (grunt.file.isFile(iconPath)) {
						return iconPath;
					}
					return lastPath;
				}, false);
				if (iconPath) {
					iconList.push(iconPath);
				}
				return iconList;
			}, []);

			grunt.verbose.writeln('Icons ' + iconList.join().cyan + ', dest ' + file.dest.cyan + '.');

			var fontDir = path.dirname(file.dest);

			grunt.config('webfont.' + targetName, {
				options: options.webfont,
				src: iconList,
				dest: fontDir
			});

			grunt.config('copy.' + targetName, {
				options: options.copy,
				files: [
					{
						src: path.join(fontDir, options.webfont.font + '.css'),
						dest: file.dest
					}
				]
			});

			grunt.task.run(['webfont:' + targetName, 'copy:' + targetName]);
		});
	});
};