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- #!/usr/bin/env node
- var path = require('path'),
- fs = require('../lib/less-node/fs'),
- os = require("os"),
- errno,
- mkdirp;
- try {
- errno = require('errno');
- } catch (err) {
- errno = null;
- }
- var less = require('../lib/less-node'),
- pluginLoader = new less.PluginLoader(less),
- plugin,
- plugins = [];
- var args = process.argv.slice(1);
- var silent = false,
- verbose = false,
- options = {
- depends: false,
- compress: false,
- max_line_len: -1,
- lint: false,
- paths: [],
- color: true,
- strictImports: false,
- insecure: false,
- rootpath: '',
- relativeUrls: false,
- ieCompat: true,
- strictMath: false,
- strictUnits: false,
- globalVars: null,
- modifyVars: null,
- urlArgs: '',
- plugins: plugins
- };
- 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))$/i.exec(arg);
- if (!onOff) {
- console.error(" unable to parse " + arg + " as a boolean. use one of on/t/true/y/yes/off/f/false/n/no");
- continueProcessing = false;
- process.exitCode = 1;
- return false;
- }
- return Boolean(onOff[2]);
- };
- var parseVariableOption = function(option, variables) {
- var parts = option.split('=', 2);
- variables[parts[0]] = parts[1];
- };
- var sourceMapFileInline = false;
- function printUsage() {
- less.lesscHelper.printUsage();
- pluginLoader.printUsage(plugins);
- continueProcessing = false;
- }
- // self executing function so we can return
- (function() {
- args = args.filter(function (arg) {
- var match;
- match = arg.match(/^-I(.+)$/);
- 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 'no-ie-compat':
- options.ieCompat = false;
- break;
- case 'no-js':
- options.javascriptEnabled = false;
- 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-map-inline':
- sourceMapFileInline = true;
- options.sourceMap = true;
- break;
- 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 "ru":
- case "relative-urls":
- options.relativeUrls = true;
- break;
- case "sm":
- case "strict-math":
- if (checkArgFunc(arg, match[2])) {
- options.strictMath = checkBooleanArg(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];
- plugin = pluginLoader.tryLoadPlugin(name, pluginOptions);
- if (plugin) {
- plugins.push(plugin);
- } else {
- 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;
- }
- break;
- default:
- plugin = pluginLoader.tryLoadPlugin("less-plugin-" + arg, match[2]);
- if (plugin) {
- plugins.push(plugin);
- } else {
- console.error("Unable to interpret argument " + arg +
- " - if it is a plugin (less-plugin-" + arg + "), make sure that it is installed under or at" +
- " the same level as less");
- process.exitCode = 1;
- }
- break;
- }
- });
- 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) {
- less.writeError(err, options);
- 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);
- });
- }
- })();
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