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executable file 565 lines (519 sloc) 19 KB
#!/usr/bin/env node
var path = require('path'),
fs = require('../lib/less-node/fs'),
os = require('os'),
utils = require('../lib/less/utils'),
Constants = require('../lib/less/constants'),
errno,
mkdirp;
try {
errno = require('errno');
} catch (err) {
errno = null;
}
var less = require('../lib/less-node'),
pluginManager = new less.PluginManager(less),
fileManager = new less.FileManager(),
plugins = [],
queuePlugins = [],
args = process.argv.slice(1),
silent = false,
verbose = false,
options = less.options;
options.plugins = plugins;
options.reUsePluginManager = true;
var sourceMapOptions = {};
var continueProcessing = true;
// Calling process.exit does not flush stdout always. Instead of exiting the process, we set the process' exitCode,
// close all handles and wait for the event loop to exit the process.
// @see https://github.com/nodejs/node/issues/6409
// Unfortunately, node 0.10.x does not support setting process.exitCode, so we need to call reallyExit() explicitly.
// @see https://nodejs.org/api/process.html#process_process_exitcode
// Additionally we also need to make sure that uncaughtExceptions are never swallowed.
// @see https://github.com/less/less.js/issues/2881
// This code can safely be removed if node 0.10.x is not supported anymore.
process.on('exit', function() { process.reallyExit(process.exitCode); });
process.on('uncaughtException', function(err) {
console.error(err);
process.exitCode = 1;
});
// This code will still be required because otherwise rejected promises would not be reported to the user
process.on('unhandledRejection', function(err) {
console.error(err);
process.exitCode = 1;
});
var checkArgFunc = function(arg, option) {
if (!option) {
console.error(arg + ' option requires a parameter');
continueProcessing = false;
process.exitCode = 1;
return false;
}
return true;
};
var checkBooleanArg = function(arg) {
var onOff = /^((on|t|true|y|yes)|(off|f|false|n|no))$/i.exec(arg);
if (!onOff) {
console.error(' unable to parse ' + arg + ' as a boolean. use one of on/t/true/y/yes/off/f/false/n/no');
continueProcessing = false;
process.exitCode = 1;
return false;
}
return Boolean(onOff[2]);
};
var parseVariableOption = function(option, variables) {
var parts = option.split('=', 2);
variables[parts[0]] = parts[1];
};
var sourceMapFileInline = false;
function printUsage() {
less.lesscHelper.printUsage();
pluginManager.Loader.printUsage(plugins);
continueProcessing = false;
}
function render() {
if (!continueProcessing) {
return;
}
var input = args[1];
if (input && input != '-') {
input = path.resolve(process.cwd(), input);
}
var output = args[2];
var outputbase = args[2];
if (output) {
output = path.resolve(process.cwd(), output);
}
if (options.sourceMap) {
sourceMapOptions.sourceMapInputFilename = input;
if (!sourceMapOptions.sourceMapFullFilename) {
if (!output && !sourceMapFileInline) {
console.error('the sourcemap option only has an optional filename if the css filename is given');
console.error('consider adding --source-map-map-inline which embeds the sourcemap into the css');
process.exitCode = 1;
return;
}
// its in the same directory, so always just the basename
if (output) {
sourceMapOptions.sourceMapOutputFilename = path.basename(output);
sourceMapOptions.sourceMapFullFilename = output + '.map';
}
// its in the same directory, so always just the basename
if ('sourceMapFullFilename' in sourceMapOptions) {
sourceMapOptions.sourceMapFilename = path.basename(sourceMapOptions.sourceMapFullFilename);
}
} else if (options.sourceMap && !sourceMapFileInline) {
var mapFilename = path.resolve(process.cwd(), sourceMapOptions.sourceMapFullFilename),
mapDir = path.dirname(mapFilename),
outputDir = path.dirname(output);
// find the path from the map to the output file
sourceMapOptions.sourceMapOutputFilename = path.join(
path.relative(mapDir, outputDir), path.basename(output));
// make the sourcemap filename point to the sourcemap relative to the css file output directory
sourceMapOptions.sourceMapFilename = path.join(
path.relative(outputDir, mapDir), path.basename(sourceMapOptions.sourceMapFullFilename));
}
}
if (sourceMapOptions.sourceMapBasepath === undefined) {
sourceMapOptions.sourceMapBasepath = input ? path.dirname(input) : process.cwd();
}
if (sourceMapOptions.sourceMapRootpath === undefined) {
var pathToMap = path.dirname((sourceMapFileInline ? output : sourceMapOptions.sourceMapFullFilename) || '.'),
pathToInput = path.dirname(sourceMapOptions.sourceMapInputFilename || '.');
sourceMapOptions.sourceMapRootpath = path.relative(pathToMap, pathToInput);
}
if (!input) {
console.error('lessc: no input files');
console.error('');
printUsage();
process.exitCode = 1;
return;
}
var ensureDirectory = function (filepath) {
var dir = path.dirname(filepath),
cmd,
existsSync = fs.existsSync || path.existsSync;
if (!existsSync(dir)) {
if (mkdirp === undefined) {
try {mkdirp = require('mkdirp');}
catch (e) { mkdirp = null; }
}
cmd = mkdirp && mkdirp.sync || fs.mkdirSync;
cmd(dir);
}
};
if (options.depends) {
if (!outputbase) {
console.error('option --depends requires an output path to be specified');
process.exitCode = 1;
return;
}
process.stdout.write(outputbase + ': ');
}
if (!sourceMapFileInline) {
var writeSourceMap = function(output, onDone) {
output = output || '';
var filename = sourceMapOptions.sourceMapFullFilename;
ensureDirectory(filename);
fs.writeFile(filename, output, 'utf8', function (err) {
if (err) {
var description = 'Error: ';
if (errno && errno.errno[err.errno]) {
description += errno.errno[err.errno].description;
} else {
description += err.code + ' ' + err.message;
}
console.error('lessc: failed to create file ' + filename);
console.error(description);
process.exitCode = 1;
} else {
less.logger.info('lessc: wrote ' + filename);
}
onDone();
});
};
}
var writeSourceMapIfNeeded = function(output, onDone) {
if (options.sourceMap && !sourceMapFileInline) {
writeSourceMap(output, onDone);
} else {
onDone();
}
};
var writeOutput = function(output, result, onSuccess) {
if (options.depends) {
onSuccess();
} else if (output) {
ensureDirectory(output);
fs.writeFile(output, result.css, {encoding: 'utf8'}, function (err) {
if (err) {
var description = 'Error: ';
if (errno && errno.errno[err.errno]) {
description += errno.errno[err.errno].description;
} else {
description += err.code + ' ' + err.message;
}
console.error('lessc: failed to create file ' + output);
console.error(description);
process.exitCode = 1;
} else {
less.logger.info('lessc: wrote ' + output);
onSuccess();
}
});
} else if (!options.depends) {
process.stdout.write(result.css);
onSuccess();
}
};
var logDependencies = function(options, result) {
if (options.depends) {
var depends = '';
for (var i = 0; i < result.imports.length; i++) {
depends += result.imports[i] + ' ';
}
console.log(depends);
}
};
var parseLessFile = function (e, data) {
if (e) {
console.error('lessc: ' + e.message);
process.exitCode = 1;
return;
}
data = data.replace(/^\uFEFF/, '');
options.paths = [path.dirname(input)].concat(options.paths);
options.filename = input;
if (options.lint) {
options.sourceMap = false;
}
sourceMapOptions.sourceMapFileInline = sourceMapFileInline;
if (options.sourceMap) {
options.sourceMap = sourceMapOptions;
}
less.logger.addListener({
info: function(msg) {
if (verbose) {
console.log(msg);
}
},
warn: function(msg) {
// do not show warning if the silent option is used
if (!silent) {
console.warn(msg);
}
},
error: function(msg) {
console.error(msg);
}
});
less.render(data, options)
.then(function(result) {
if (!options.lint) {
writeOutput(output, result, function() {
writeSourceMapIfNeeded(result.map, function() {
logDependencies(options, result);
});
});
}
},
function(err) {
if (!options.silent) {
console.error(err.toString({
stylize: options.color && less.lesscHelper.stylize
}));
}
process.exitCode = 1;
});
};
if (input != '-') {
fs.readFile(input, 'utf8', parseLessFile);
} else {
process.stdin.resume();
process.stdin.setEncoding('utf8');
var buffer = '';
process.stdin.on('data', function(data) {
buffer += data;
});
process.stdin.on('end', function() {
parseLessFile(false, buffer);
});
}
}
function processPluginQueue() {
var x = 0;
function pluginError(name) {
console.error('Unable to load plugin ' + name +
' please make sure that it is installed under or at the same level as less');
process.exitCode = 1;
}
function pluginFinished(plugin) {
x++;
plugins.push(plugin);
if (x === queuePlugins.length) {
render();
}
}
queuePlugins.forEach(function(queue) {
var context = utils.clone(options);
pluginManager.Loader.loadPlugin(queue.name, process.cwd(), context, less.environment, fileManager)
.then(function(data) {
pluginFinished({
fileContent: data.contents,
filename: data.filename,
options: queue.options
});
})
.catch(function() {
pluginError(queue.name);
});
});
}
// self executing function so we can return
(function() {
args = args.filter(function (arg) {
var match;
match = arg.match(/^-I(.+)$/);
if (match) {
options.paths.push(match[1]);
return false;
}
match = arg.match(/^--?([a-z][0-9a-z-]*)(?:=(.*))?$/i);
if (match) {
arg = match[1];
} else {
return arg;
}
switch (arg) {
case 'v':
case 'version':
console.log('lessc ' + less.version.join('.') + ' (Less Compiler) [JavaScript]');
continueProcessing = false;
break;
case 'verbose':
verbose = true;
break;
case 's':
case 'silent':
silent = true;
break;
case 'l':
case 'lint':
options.lint = true;
break;
case 'strict-imports':
options.strictImports = true;
break;
case 'h':
case 'help':
printUsage();
break;
case 'x':
case 'compress':
options.compress = true;
break;
case 'insecure':
options.insecure = true;
break;
case 'M':
case 'depends':
options.depends = true;
break;
case 'max-line-len':
if (checkArgFunc(arg, match[2])) {
options.maxLineLen = parseInt(match[2], 10);
if (options.maxLineLen <= 0) {
options.maxLineLen = -1;
}
}
break;
case 'no-color':
options.color = false;
break;
case 'ie-compat':
options.ieCompat = true;
break;
case 'js':
options.javascriptEnabled = true;
break;
case 'no-js':
console.error('The "--no-js" argument is deprecated, as inline JavaScript ' +
'is disabled by default. Use "--js" to enable inline JavaScript (not recommended).');
break;
case 'include-path':
if (checkArgFunc(arg, match[2])) {
// ; supported on windows.
// : supported on windows and linux, excluding a drive letter like C:\ so C:\file:D:\file parses to 2
options.paths = match[2]
.split(os.type().match(/Windows/) ? /:(?!\\)|;/ : ':')
.map(function(p) {
if (p) {
return path.resolve(process.cwd(), p);
}
});
}
break;
case 'line-numbers':
if (checkArgFunc(arg, match[2])) {
options.dumpLineNumbers = match[2];
}
break;
case 'source-map':
options.sourceMap = true;
if (match[2]) {
sourceMapOptions.sourceMapFullFilename = match[2];
}
break;
case 'source-map-rootpath':
if (checkArgFunc(arg, match[2])) {
sourceMapOptions.sourceMapRootpath = match[2];
}
break;
case 'source-map-basepath':
if (checkArgFunc(arg, match[2])) {
sourceMapOptions.sourceMapBasepath = match[2];
}
break;
case 'source-map-inline':
case 'source-map-map-inline':
sourceMapFileInline = true;
options.sourceMap = true;
break;
case 'source-map-include-source':
case 'source-map-less-inline':
sourceMapOptions.outputSourceFiles = true;
break;
case 'source-map-url':
if (checkArgFunc(arg, match[2])) {
sourceMapOptions.sourceMapURL = match[2];
}
break;
case 'rp':
case 'rootpath':
if (checkArgFunc(arg, match[2])) {
options.rootpath = match[2].replace(/\\/g, '/');
}
break;
case 'relative-urls':
console.warn('The --relative-urls option has been deprecated. Use --rewrite-urls=all.');
options.rewriteUrls = Constants.RewriteUrls.ALL;
break;
case 'ru':
case 'rewrite-urls':
var m = match[2];
if (m) {
if (m === 'local') {
options.rewriteUrls = Constants.RewriteUrls.LOCAL;
} else if (m === 'off') {
options.rewriteUrls = Constants.RewriteUrls.OFF;
} else if (m === 'all') {
options.rewriteUrls = Constants.RewriteUrls.ALL;
} else {
console.error('Unknown rewrite-urls argument ' + m);
continueProcessing = false;
process.exitCode = 1;
}
} else {
options.rewriteUrls = Constants.RewriteUrls.ALL;
}
break;
case 'sm':
case 'strict-math':
console.warn('The --strict-math option has been deprecated. Use --math=strict.');
if (checkArgFunc(arg, match[2])) {
if (checkBooleanArg(match[2])) {
options.math = Constants.Math.STRICT_LEGACY;
}
}
break;
case 'm':
case 'math':
if (checkArgFunc(arg, match[2])) {
options.math = match[2];
}
break;
case 'su':
case 'strict-units':
if (checkArgFunc(arg, match[2])) {
options.strictUnits = checkBooleanArg(match[2]);
}
break;
case 'global-var':
if (checkArgFunc(arg, match[2])) {
if (!options.globalVars) {
options.globalVars = {};
}
parseVariableOption(match[2], options.globalVars);
}
break;
case 'modify-var':
if (checkArgFunc(arg, match[2])) {
if (!options.modifyVars) {
options.modifyVars = {};
}
parseVariableOption(match[2], options.modifyVars);
}
break;
case 'url-args':
if (checkArgFunc(arg, match[2])) {
options.urlArgs = match[2];
}
break;
case 'plugin':
var splitupArg = match[2].match(/^([^=]+)(=(.*))?/),
name = splitupArg[1],
pluginOptions = splitupArg[3];
queuePlugins.push({ name: name, options: pluginOptions });
break;
default:
queuePlugins.push({ name: arg, options: match[2], default: true });
break;
}
});
if (queuePlugins.length > 0) {
processPluginQueue();
}
else {
render();
}
})();