forked from zhurui/management
185 lines
6.7 KiB
JavaScript
185 lines
6.7 KiB
JavaScript
#!/usr/bin/env node
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var fs = require('fs');
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var path = require('path');
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var CleanCSS = require('../index');
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var commands = require('commander');
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var packageConfig = fs.readFileSync(path.join(path.dirname(fs.realpathSync(process.argv[1])), '../package.json'));
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var buildVersion = JSON.parse(packageConfig).version;
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var isWindows = process.platform == 'win32';
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var lineBreak = require('os').EOL;
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// Specify commander options to parse command line params correctly
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commands
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.version(buildVersion, '-v, --version')
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.usage('[options] source-file, [source-file, ...]')
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.option('-b, --keep-line-breaks', 'Keep line breaks')
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.option('-c, --compatibility [ie7|ie8]', 'Force compatibility mode (see Readme for advanced examples)')
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.option('-d, --debug', 'Shows debug information (minification time & compression efficiency)')
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.option('-o, --output [output-file]', 'Use [output-file] as output instead of STDOUT')
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.option('-r, --root [root-path]', 'Set a root path to which resolve absolute @import rules')
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.option('-s, --skip-import', 'Disable @import processing')
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.option('-t, --timeout [seconds]', 'Per connection timeout when fetching remote @imports (defaults to 5 seconds)')
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.option('--rounding-precision [n]', 'Rounds to `N` decimal places. Defaults to 2. -1 disables rounding', parseInt)
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.option('--s0', 'Remove all special comments, i.e. /*! comment */')
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.option('--s1', 'Remove all special comments but the first one')
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.option('--semantic-merging', 'Enables unsafe mode by assuming BEM-like semantic stylesheets (warning, this may break your styling!)')
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.option('--skip-advanced', 'Disable advanced optimizations - ruleset reordering & merging')
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.option('--skip-aggressive-merging', 'Disable properties merging based on their order')
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.option('--skip-import-from [rules]', 'Disable @import processing for specified rules', function (val) { return val.split(','); }, [])
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.option('--skip-media-merging', 'Disable @media merging')
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.option('--skip-rebase', 'Disable URLs rebasing')
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.option('--skip-restructuring', 'Disable restructuring optimizations')
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.option('--skip-shorthand-compacting', 'Disable shorthand compacting')
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.option('--source-map', 'Enables building input\'s source map')
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.option('--source-map-inline-sources', 'Enables inlining sources inside source maps');
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commands.on('--help', function () {
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console.log(' Examples:\n');
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console.log(' %> cleancss one.css');
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console.log(' %> cleancss -o one-min.css one.css');
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if (isWindows) {
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console.log(' %> type one.css two.css three.css | cleancss -o merged-and-minified.css');
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} else {
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console.log(' %> cat one.css two.css three.css | cleancss -o merged-and-minified.css');
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console.log(' %> cat one.css two.css three.css | cleancss | gzip -9 -c > merged-minified-and-gzipped.css.gz');
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}
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console.log('');
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process.exit();
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});
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commands.parse(process.argv);
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// If no sensible data passed in just print help and exit
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var fromStdin = !process.env.__DIRECT__ && !process.stdin.isTTY;
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if (!fromStdin && commands.args.length === 0) {
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commands.outputHelp();
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return 0;
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}
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// Now coerce commands into CleanCSS configuration...
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var options = {
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advanced: commands.skipAdvanced ? false : true,
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aggressiveMerging: commands.skipAggressiveMerging ? false : true,
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compatibility: commands.compatibility,
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debug: commands.debug,
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inliner: commands.timeout ? { timeout: parseFloat(commands.timeout) * 1000 } : undefined,
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keepBreaks: !!commands.keepLineBreaks,
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keepSpecialComments: commands.s0 ? 0 : (commands.s1 ? 1 : '*'),
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mediaMerging: commands.skipMediaMerging ? false : true,
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processImport: commands.skipImport ? false : true,
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processImportFrom: processImportFrom(commands.skipImportFrom),
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rebase: commands.skipRebase ? false : true,
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restructuring: commands.skipRestructuring ? false : true,
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root: commands.root,
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roundingPrecision: commands.roundingPrecision,
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semanticMerging: commands.semanticMerging ? true : false,
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shorthandCompacting: commands.skipShorthandCompacting ? false : true,
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sourceMap: commands.sourceMap,
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sourceMapInlineSources: commands.sourceMapInlineSources,
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target: commands.output
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};
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if (options.root || commands.args.length > 0) {
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var relativeTo = options.root || commands.args[0];
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if (isRemote(relativeTo)) {
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options.relativeTo = relativeTo;
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} else {
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var resolvedRelativeTo = path.resolve(relativeTo);
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options.relativeTo = fs.statSync(resolvedRelativeTo).isFile() ?
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path.dirname(resolvedRelativeTo) :
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resolvedRelativeTo;
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}
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}
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if (options.sourceMap && !options.target) {
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outputFeedback(['Source maps will not be built because you have not specified an output file.'], true);
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options.sourceMap = false;
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}
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// ... and do the magic!
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if (commands.args.length > 0) {
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minify(commands.args);
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} else {
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var stdin = process.openStdin();
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stdin.setEncoding('utf-8');
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var data = '';
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stdin.on('data', function (chunk) {
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data += chunk;
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});
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stdin.on('end', function () {
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minify(data);
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});
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}
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function isRemote(path) {
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return /^https?:\/\//.test(path) || /^\/\//.test(path);
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}
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function processImportFrom(rules) {
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if (rules.length === 0) {
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return ['all'];
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} else if (rules.length == 1 && rules[0] == 'all') {
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return [];
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} else {
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return rules.map(function (rule) {
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if (rule == 'local')
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return 'remote';
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else if (rule == 'remote')
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return 'local';
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else
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return '!' + rule;
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});
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}
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}
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function minify(data) {
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new CleanCSS(options).minify(data, function (errors, minified) {
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if (options.debug) {
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console.error('Original: %d bytes', minified.stats.originalSize);
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console.error('Minified: %d bytes', minified.stats.minifiedSize);
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console.error('Efficiency: %d%', ~~(minified.stats.efficiency * 10000) / 100.0);
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console.error('Time spent: %dms', minified.stats.timeSpent);
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}
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outputFeedback(minified.errors, true);
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outputFeedback(minified.warnings);
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if (minified.errors.length > 0)
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process.exit(1);
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if (minified.sourceMap) {
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var mapFilename = path.basename(options.target) + '.map';
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output(minified.styles + lineBreak + '/*# sourceMappingURL=' + mapFilename + ' */');
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outputMap(minified.sourceMap, mapFilename);
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} else {
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output(minified.styles);
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}
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});
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}
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function output(minified) {
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if (options.target)
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fs.writeFileSync(options.target, minified, 'utf8');
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else
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process.stdout.write(minified);
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}
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function outputMap(sourceMap, mapFilename) {
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var mapPath = path.join(path.dirname(options.target), mapFilename);
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fs.writeFileSync(mapPath, sourceMap.toString(), 'utf-8');
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}
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function outputFeedback(messages, isError) {
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var prefix = isError ? '\x1B[31mERROR\x1B[39m:' : 'WARNING:';
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messages.forEach(function (message) {
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console.error('%s %s', prefix, message);
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});
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}
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