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