var gulp = require('gulp'), php = require('gulp-connect-php'), less = require('gulp-less'), rename = require('gulp-rename'), plumber = require('gulp-plumber'), postcss = require('gulp-postcss'); var resources = { daux:{source: "themes/daux/less/theme.less", dest: "themes/daux/css/"}, daux_blue:{source: "themes/daux/less/theme-blue.less", dest: "themes/daux/css/"}, daux_green:{source: "themes/daux/less/theme-green.less", dest: "themes/daux/css/"}, daux_navy:{source: "themes/daux/less/theme-navy.less", dest: "themes/daux/css/"}, daux_red:{source: "themes/daux/less/theme-red.less", dest: "themes/daux/css/"}, daux_singlepage:{source: "themes/daux_singlepage/less/main.less", dest: "themes/daux_singlepage/css/"} }; var unusedRules = [ //We only use one glyphicon ... ".glyphicon-", "!.glyphicon-chevron-right", //we dont need all buttons ".btn-", "!.btn-primary", "!.btn-secondary", "!.btn-hero", "!.btn-sidebar", ".caret", //Typography ".h1", ".h2", ".h3", ".h4", ".h5", ".h6", ".small", // We need only small columns ".col-", "!.col-sm", // We don't use a lot of navs and navbars ".navbar-fixed", ".navbar-inverse", ".navbar-default", ".nav-pills", ".nav-tabs", ".nav-stacked", ".nav-justified", // And a few others we don't use ".bg-", ".table" ]; function prepare_rules(rules) { var regexes = {inclusion: [], exclusion: []}, rule, pattern, regex, exclusion; for (rule in rules) { if (!rules.hasOwnProperty(rule)) continue; pattern = rules[rule]; exclusion = pattern.indexOf('!') === 0; if (exclusion) { pattern = pattern.slice(1); } regex = pattern.replace('.', '\\.').replace('*', '(.*)'); if (exclusion) { regexes.exclusion.push(new RegExp(regex)); } else { regexes.inclusion.push(new RegExp(regex)); } } return regexes; } function processPatterns(patterns, string) { var i; for (i in patterns.exclusion) { if (!patterns.exclusion.hasOwnProperty(i)) continue; if (string.match(patterns.exclusion[i])) return false; } for (i in patterns.inclusion) { if (!patterns.inclusion.hasOwnProperty(i)) continue; if (string.match(patterns.inclusion[i])) return true; } } function removeUnusedRules(rules) { var regexes = prepare_rules(rules); return function(css) { css.walkRules(function (rule) { var removedSome = false, selectors = rule.selectors, i; for (i = 0; i < selectors.length; i++) { if (processPatterns(regexes, selectors[i])) { selectors.splice(i, 1); i--; removedSome = true; } } if(removedSome) { if (selectors.length == 0) { rule.remove(); } else { rule.selectors = selectors; } } }); return css; } } function createTask(source, dest) { return function() { var nano_options = { safe: true, // Disable dangerous optimisations filterPlugins: false, // This does very weird stuff autoprefixer: { add: true, // Add needed prefixes remove: true // Remove unnecessary prefixes } }; return gulp.src(source) .pipe(plumber()) .pipe(less()) .pipe(postcss([ removeUnusedRules(unusedRules), require('cssnano')(nano_options) ])) .pipe(rename({suffix: '.min'})) .pipe(gulp.dest(dest)); } } var style_tasks = []; for (var style in resources) { gulp.task('style_' + style, createTask(resources[style].source, resources[style].dest)); style_tasks.push('style_' + style); } gulp.task("styles", style_tasks); gulp.task('watch', function() { // Watch .less files gulp.watch('themes/daux/less/**/*.less', ['styles']); }); gulp.task('php', function() { php.server({ keepalive: true, open: true, port: 8085, router: "index.php" }); }); gulp.task('default', ['php']);