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cleancss
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cleancss
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#!/usr/bin/env node
var util = require('util');
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('--s0', 'Remove all special comments, i.e. /*! comment */')
.option('--s1', 'Remove all special comments but the first one')
.option('-r, --root [root-path]', 'Set a root path to which resolve absolute @import rules')
.option('-o, --output [output-file]', 'Use [output-file] as output instead of STDOUT')
.option('-s, --skip-import', 'Disable @import processing')
.option('--skip-rebase', 'Disable URLs rebasing')
.option('--skip-advanced', 'Disable advanced optimizations - selector & property merging, reduction, etc.')
.option('--skip-aggressive-merging', 'Disable properties merging based on their order')
.option('--rounding-precision [value]', 'Rounding precision, defaults to 2', parseInt)
.option('-c, --compatibility [ie7|ie8]', 'Force compatibility mode')
.option('-t, --timeout [seconds]', 'Per connection timeout when fetching remote @imports (defaults to 5 seconds)')
.option('-d, --debug', 'Shows debug information (minification time & compression efficiency)');
commands.on('--help', function() {
util.puts(' Examples:\n');
util.puts(' %> cleancss one.css');
util.puts(' %> cleancss -o one-min.css one.css');
if (isWindows) {
util.puts(' %> type one.css two.css three.css | cleancss -o merged-and-minified.css');
} else {
util.puts(' %> cat one.css two.css three.css | cleancss -o merged-and-minified.css');
util.puts(' %> cat one.css two.css three.css | cleancss | gzip -9 -c > merged-minified-and-gzipped.css.gz');
}
util.puts('');
process.exit();
});
commands.parse(process.argv);
var options = {
sources: null,
target: null
};
var cleanOptions = {};
var fromStdin = !process.env.__DIRECT__ && !process.stdin.isTTY;
// If no sensible data passed in just print help and exit
if (!fromStdin && commands.args.length === 0) {
commands.outputHelp();
return 0;
}
// Now coerce commands into CleanCSS configuration...
if (commands.output)
cleanOptions.target = options.target = commands.output;
if (commands.keepLineBreaks)
cleanOptions.keepBreaks = true;
if (commands.s1)
cleanOptions.keepSpecialComments = 1;
if (commands.s0)
cleanOptions.keepSpecialComments = 0;
if (commands.root)
cleanOptions.root = commands.root;
if (commands.skipImport)
cleanOptions.processImport = false;
if (commands.skipRebase)
cleanOptions.noRebase = true;
if (commands.skipAdvanced)
cleanOptions.noAdvanced = true;
if (commands.skipAggressiveMerging)
cleanOptions.noAggressiveMerging = true;
if (commands.compatibility)
cleanOptions.compatibility = commands.compatibility;
if (commands.roundingPrecision !== undefined)
cleanOptions.roundingPrecision = commands.roundingPrecision;
if (commands.debug)
cleanOptions.debug = true;
if (commands.timeout)
cleanOptions.inliner = { timeout: parseFloat(commands.timeout) * 1000 };
if (commands.args.length > 0) {
var relativeTo = (cleanOptions.noRebase ? false : cleanOptions.root) || commands.args[0];
cleanOptions.relativeTo = path.dirname(path.resolve(relativeTo));
options.sources = commands.args.map(function(source) {
var isRemote = /^https?:\/\//.test(source);
if (cleanOptions.processImport === false)
source += '@shallow';
return isRemote ?
source :
path.relative(cleanOptions.relativeTo, path.resolve(source));
});
}
// ... and do the magic!
if (options.sources) {
var data = options.sources
.map(function(source) {
return '@import url(' + source + ');';
})
.join('');
minify(data);
} 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 minify(data) {
new CleanCSS(cleanOptions).minify(data, function(errors, minified) {
if (cleanOptions.debug) {
console.error('Original: %d bytes', this.stats.originalSize);
console.error('Minified: %d bytes', this.stats.minifiedSize);
console.error('Efficiency: %d%', ~~(this.stats.efficiency * 10000) / 100.0);
console.error('Time spent: %dms', this.stats.timeSpent);
}
outputFeedback(this.errors, true);
outputFeedback(this.warnings);
if (this.errors.length > 0)
process.exit(1);
output(minified);
});
}
function output(minified) {
if (options.target)
fs.writeFileSync(options.target, minified, 'utf8');
else
process.stdout.write(minified);
}
function outputFeedback(messages, isError) {
var prefix = isError ? '\x1B[31mERROR\x1B[39m:' : 'WARNING:';
messages.forEach(function(message) {
console.error('%s %s', prefix, message);
});
}