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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';
// 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 + '/*# 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);
});
}