--- /dev/null
+/**
+ * Module dependencies.
+ */
+
+var EventEmitter = require('events').EventEmitter;
+var spawn = require('child_process').spawn;
+var path = require('path');
+var dirname = path.dirname;
+var basename = path.basename;
+var fs = require('fs');
+
+/**
+ * Inherit `Command` from `EventEmitter.prototype`.
+ */
+
+require('util').inherits(Command, EventEmitter);
+
+/**
+ * Expose the root command.
+ */
+
+exports = module.exports = new Command();
+
+/**
+ * Expose `Command`.
+ */
+
+exports.Command = Command;
+
+/**
+ * Expose `Option`.
+ */
+
+exports.Option = Option;
+
+/**
+ * Initialize a new `Option` with the given `flags` and `description`.
+ *
+ * @param {String} flags
+ * @param {String} description
+ * @api public
+ */
+
+function Option(flags, description) {
+ this.flags = flags;
+ this.required = ~flags.indexOf('<');
+ this.optional = ~flags.indexOf('[');
+ this.bool = !~flags.indexOf('-no-');
+ flags = flags.split(/[ ,|]+/);
+ if (flags.length > 1 && !/^[[<]/.test(flags[1])) this.short = flags.shift();
+ this.long = flags.shift();
+ this.description = description || '';
+}
+
+/**
+ * Return option name.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Option.prototype.name = function() {
+ return this.long
+ .replace('--', '')
+ .replace('no-', '');
+};
+
+/**
+ * Return option name, in a camelcase format that can be used
+ * as a object attribute key.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Option.prototype.attributeName = function() {
+ return camelcase(this.name());
+};
+
+/**
+ * Check if `arg` matches the short or long flag.
+ *
+ * @param {String} arg
+ * @return {Boolean}
+ * @api private
+ */
+
+Option.prototype.is = function(arg) {
+ return this.short === arg || this.long === arg;
+};
+
+/**
+ * Initialize a new `Command`.
+ *
+ * @param {String} name
+ * @api public
+ */
+
+function Command(name) {
+ this.commands = [];
+ this.options = [];
+ this._execs = {};
+ this._allowUnknownOption = false;
+ this._args = [];
+ this._name = name || '';
+}
+
+/**
+ * Add command `name`.
+ *
+ * The `.action()` callback is invoked when the
+ * command `name` is specified via __ARGV__,
+ * and the remaining arguments are applied to the
+ * function for access.
+ *
+ * When the `name` is "*" an un-matched command
+ * will be passed as the first arg, followed by
+ * the rest of __ARGV__ remaining.
+ *
+ * Examples:
+ *
+ * program
+ * .version('0.0.1')
+ * .option('-C, --chdir <path>', 'change the working directory')
+ * .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
+ * .option('-T, --no-tests', 'ignore test hook')
+ *
+ * program
+ * .command('setup')
+ * .description('run remote setup commands')
+ * .action(function() {
+ * console.log('setup');
+ * });
+ *
+ * program
+ * .command('exec <cmd>')
+ * .description('run the given remote command')
+ * .action(function(cmd) {
+ * console.log('exec "%s"', cmd);
+ * });
+ *
+ * program
+ * .command('teardown <dir> [otherDirs...]')
+ * .description('run teardown commands')
+ * .action(function(dir, otherDirs) {
+ * console.log('dir "%s"', dir);
+ * if (otherDirs) {
+ * otherDirs.forEach(function (oDir) {
+ * console.log('dir "%s"', oDir);
+ * });
+ * }
+ * });
+ *
+ * program
+ * .command('*')
+ * .description('deploy the given env')
+ * .action(function(env) {
+ * console.log('deploying "%s"', env);
+ * });
+ *
+ * program.parse(process.argv);
+ *
+ * @param {String} name
+ * @param {String} [desc] for git-style sub-commands
+ * @return {Command} the new command
+ * @api public
+ */
+
+Command.prototype.command = function(name, desc, opts) {
+ if (typeof desc === 'object' && desc !== null) {
+ opts = desc;
+ desc = null;
+ }
+ opts = opts || {};
+ var args = name.split(/ +/);
+ var cmd = new Command(args.shift());
+
+ if (desc) {
+ cmd.description(desc);
+ this.executables = true;
+ this._execs[cmd._name] = true;
+ if (opts.isDefault) this.defaultExecutable = cmd._name;
+ }
+ cmd._noHelp = !!opts.noHelp;
+ this.commands.push(cmd);
+ cmd.parseExpectedArgs(args);
+ cmd.parent = this;
+
+ if (desc) return this;
+ return cmd;
+};
+
+/**
+ * Define argument syntax for the top-level command.
+ *
+ * @api public
+ */
+
+Command.prototype.arguments = function(desc) {
+ return this.parseExpectedArgs(desc.split(/ +/));
+};
+
+/**
+ * Add an implicit `help [cmd]` subcommand
+ * which invokes `--help` for the given command.
+ *
+ * @api private
+ */
+
+Command.prototype.addImplicitHelpCommand = function() {
+ this.command('help [cmd]', 'display help for [cmd]');
+};
+
+/**
+ * Parse expected `args`.
+ *
+ * For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`.
+ *
+ * @param {Array} args
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.parseExpectedArgs = function(args) {
+ if (!args.length) return;
+ var self = this;
+ args.forEach(function(arg) {
+ var argDetails = {
+ required: false,
+ name: '',
+ variadic: false
+ };
+
+ switch (arg[0]) {
+ case '<':
+ argDetails.required = true;
+ argDetails.name = arg.slice(1, -1);
+ break;
+ case '[':
+ argDetails.name = arg.slice(1, -1);
+ break;
+ }
+
+ if (argDetails.name.length > 3 && argDetails.name.slice(-3) === '...') {
+ argDetails.variadic = true;
+ argDetails.name = argDetails.name.slice(0, -3);
+ }
+ if (argDetails.name) {
+ self._args.push(argDetails);
+ }
+ });
+ return this;
+};
+
+/**
+ * Register callback `fn` for the command.
+ *
+ * Examples:
+ *
+ * program
+ * .command('help')
+ * .description('display verbose help')
+ * .action(function() {
+ * // output help here
+ * });
+ *
+ * @param {Function} fn
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.action = function(fn) {
+ var self = this;
+ var listener = function(args, unknown) {
+ // Parse any so-far unknown options
+ args = args || [];
+ unknown = unknown || [];
+
+ var parsed = self.parseOptions(unknown);
+
+ // Output help if necessary
+ outputHelpIfNecessary(self, parsed.unknown);
+
+ // If there are still any unknown options, then we simply
+ // die, unless someone asked for help, in which case we give it
+ // to them, and then we die.
+ if (parsed.unknown.length > 0) {
+ self.unknownOption(parsed.unknown[0]);
+ }
+
+ // Leftover arguments need to be pushed back. Fixes issue #56
+ if (parsed.args.length) args = parsed.args.concat(args);
+
+ self._args.forEach(function(arg, i) {
+ if (arg.required && args[i] == null) {
+ self.missingArgument(arg.name);
+ } else if (arg.variadic) {
+ if (i !== self._args.length - 1) {
+ self.variadicArgNotLast(arg.name);
+ }
+
+ args[i] = args.splice(i);
+ }
+ });
+
+ // Always append ourselves to the end of the arguments,
+ // to make sure we match the number of arguments the user
+ // expects
+ if (self._args.length) {
+ args[self._args.length] = self;
+ } else {
+ args.push(self);
+ }
+
+ fn.apply(self, args);
+ };
+ var parent = this.parent || this;
+ var name = parent === this ? '*' : this._name;
+ parent.on('command:' + name, listener);
+ if (this._alias) parent.on('command:' + this._alias, listener);
+ return this;
+};
+
+/**
+ * Define option with `flags`, `description` and optional
+ * coercion `fn`.
+ *
+ * The `flags` string should contain both the short and long flags,
+ * separated by comma, a pipe or space. The following are all valid
+ * all will output this way when `--help` is used.
+ *
+ * "-p, --pepper"
+ * "-p|--pepper"
+ * "-p --pepper"
+ *
+ * Examples:
+ *
+ * // simple boolean defaulting to false
+ * program.option('-p, --pepper', 'add pepper');
+ *
+ * --pepper
+ * program.pepper
+ * // => Boolean
+ *
+ * // simple boolean defaulting to true
+ * program.option('-C, --no-cheese', 'remove cheese');
+ *
+ * program.cheese
+ * // => true
+ *
+ * --no-cheese
+ * program.cheese
+ * // => false
+ *
+ * // required argument
+ * program.option('-C, --chdir <path>', 'change the working directory');
+ *
+ * --chdir /tmp
+ * program.chdir
+ * // => "/tmp"
+ *
+ * // optional argument
+ * program.option('-c, --cheese [type]', 'add cheese [marble]');
+ *
+ * @param {String} flags
+ * @param {String} description
+ * @param {Function|*} [fn] or default
+ * @param {*} [defaultValue]
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.option = function(flags, description, fn, defaultValue) {
+ var self = this,
+ option = new Option(flags, description),
+ oname = option.name(),
+ name = option.attributeName();
+
+ // default as 3rd arg
+ if (typeof fn !== 'function') {
+ if (fn instanceof RegExp) {
+ var regex = fn;
+ fn = function(val, def) {
+ var m = regex.exec(val);
+ return m ? m[0] : def;
+ };
+ } else {
+ defaultValue = fn;
+ fn = null;
+ }
+ }
+
+ // preassign default value only for --no-*, [optional], or <required>
+ if (!option.bool || option.optional || option.required) {
+ // when --no-* we make sure default is true
+ if (!option.bool) defaultValue = true;
+ // preassign only if we have a default
+ if (defaultValue !== undefined) {
+ self[name] = defaultValue;
+ option.defaultValue = defaultValue;
+ }
+ }
+
+ // register the option
+ this.options.push(option);
+
+ // when it's passed assign the value
+ // and conditionally invoke the callback
+ this.on('option:' + oname, function(val) {
+ // coercion
+ if (val !== null && fn) {
+ val = fn(val, self[name] === undefined ? defaultValue : self[name]);
+ }
+
+ // unassigned or bool
+ if (typeof self[name] === 'boolean' || typeof self[name] === 'undefined') {
+ // if no value, bool true, and we have a default, then use it!
+ if (val == null) {
+ self[name] = option.bool
+ ? defaultValue || true
+ : false;
+ } else {
+ self[name] = val;
+ }
+ } else if (val !== null) {
+ // reassign
+ self[name] = val;
+ }
+ });
+
+ return this;
+};
+
+/**
+ * Allow unknown options on the command line.
+ *
+ * @param {Boolean} arg if `true` or omitted, no error will be thrown
+ * for unknown options.
+ * @api public
+ */
+Command.prototype.allowUnknownOption = function(arg) {
+ this._allowUnknownOption = arguments.length === 0 || arg;
+ return this;
+};
+
+/**
+ * Parse `argv`, settings options and invoking commands when defined.
+ *
+ * @param {Array} argv
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.parse = function(argv) {
+ // implicit help
+ if (this.executables) this.addImplicitHelpCommand();
+
+ // store raw args
+ this.rawArgs = argv;
+
+ // guess name
+ this._name = this._name || basename(argv[1], '.js');
+
+ // github-style sub-commands with no sub-command
+ if (this.executables && argv.length < 3 && !this.defaultExecutable) {
+ // this user needs help
+ argv.push('--help');
+ }
+
+ // process argv
+ var parsed = this.parseOptions(this.normalize(argv.slice(2)));
+ var args = this.args = parsed.args;
+
+ var result = this.parseArgs(this.args, parsed.unknown);
+
+ // executable sub-commands
+ var name = result.args[0];
+
+ var aliasCommand = null;
+ // check alias of sub commands
+ if (name) {
+ aliasCommand = this.commands.filter(function(command) {
+ return command.alias() === name;
+ })[0];
+ }
+
+ if (this._execs[name] && typeof this._execs[name] !== 'function') {
+ return this.executeSubCommand(argv, args, parsed.unknown);
+ } else if (aliasCommand) {
+ // is alias of a subCommand
+ args[0] = aliasCommand._name;
+ return this.executeSubCommand(argv, args, parsed.unknown);
+ } else if (this.defaultExecutable) {
+ // use the default subcommand
+ args.unshift(this.defaultExecutable);
+ return this.executeSubCommand(argv, args, parsed.unknown);
+ }
+
+ return result;
+};
+
+/**
+ * Execute a sub-command executable.
+ *
+ * @param {Array} argv
+ * @param {Array} args
+ * @param {Array} unknown
+ * @api private
+ */
+
+Command.prototype.executeSubCommand = function(argv, args, unknown) {
+ args = args.concat(unknown);
+
+ if (!args.length) this.help();
+ if (args[0] === 'help' && args.length === 1) this.help();
+
+ // <cmd> --help
+ if (args[0] === 'help') {
+ args[0] = args[1];
+ args[1] = '--help';
+ }
+
+ // executable
+ var f = argv[1];
+ // name of the subcommand, link `pm-install`
+ var bin = basename(f, '.js') + '-' + args[0];
+
+ // In case of globally installed, get the base dir where executable
+ // subcommand file should be located at
+ var baseDir,
+ link = fs.lstatSync(f).isSymbolicLink() ? fs.readlinkSync(f) : f;
+
+ // when symbolink is relative path
+ if (link !== f && link.charAt(0) !== '/') {
+ link = path.join(dirname(f), link);
+ }
+ baseDir = dirname(link);
+
+ // prefer local `./<bin>` to bin in the $PATH
+ var localBin = path.join(baseDir, bin);
+
+ // whether bin file is a js script with explicit `.js` extension
+ var isExplicitJS = false;
+ if (exists(localBin + '.js')) {
+ bin = localBin + '.js';
+ isExplicitJS = true;
+ } else if (exists(localBin)) {
+ bin = localBin;
+ }
+
+ args = args.slice(1);
+
+ var proc;
+ if (process.platform !== 'win32') {
+ if (isExplicitJS) {
+ args.unshift(bin);
+ // add executable arguments to spawn
+ args = (process.execArgv || []).concat(args);
+
+ proc = spawn(process.argv[0], args, { stdio: 'inherit', customFds: [0, 1, 2] });
+ } else {
+ proc = spawn(bin, args, { stdio: 'inherit', customFds: [0, 1, 2] });
+ }
+ } else {
+ args.unshift(bin);
+ proc = spawn(process.execPath, args, { stdio: 'inherit' });
+ }
+
+ var signals = ['SIGUSR1', 'SIGUSR2', 'SIGTERM', 'SIGINT', 'SIGHUP'];
+ signals.forEach(function(signal) {
+ process.on(signal, function() {
+ if (proc.killed === false && proc.exitCode === null) {
+ proc.kill(signal);
+ }
+ });
+ });
+ proc.on('close', process.exit.bind(process));
+ proc.on('error', function(err) {
+ if (err.code === 'ENOENT') {
+ console.error('\n %s(1) does not exist, try --help\n', bin);
+ } else if (err.code === 'EACCES') {
+ console.error('\n %s(1) not executable. try chmod or run with root\n', bin);
+ }
+ process.exit(1);
+ });
+
+ // Store the reference to the child process
+ this.runningCommand = proc;
+};
+
+/**
+ * Normalize `args`, splitting joined short flags. For example
+ * the arg "-abc" is equivalent to "-a -b -c".
+ * This also normalizes equal sign and splits "--abc=def" into "--abc def".
+ *
+ * @param {Array} args
+ * @return {Array}
+ * @api private
+ */
+
+Command.prototype.normalize = function(args) {
+ var ret = [],
+ arg,
+ lastOpt,
+ index;
+
+ for (var i = 0, len = args.length; i < len; ++i) {
+ arg = args[i];
+ if (i > 0) {
+ lastOpt = this.optionFor(args[i - 1]);
+ }
+
+ if (arg === '--') {
+ // Honor option terminator
+ ret = ret.concat(args.slice(i));
+ break;
+ } else if (lastOpt && lastOpt.required) {
+ ret.push(arg);
+ } else if (arg.length > 1 && arg[0] === '-' && arg[1] !== '-') {
+ arg.slice(1).split('').forEach(function(c) {
+ ret.push('-' + c);
+ });
+ } else if (/^--/.test(arg) && ~(index = arg.indexOf('='))) {
+ ret.push(arg.slice(0, index), arg.slice(index + 1));
+ } else {
+ ret.push(arg);
+ }
+ }
+
+ return ret;
+};
+
+/**
+ * Parse command `args`.
+ *
+ * When listener(s) are available those
+ * callbacks are invoked, otherwise the "*"
+ * event is emitted and those actions are invoked.
+ *
+ * @param {Array} args
+ * @return {Command} for chaining
+ * @api private
+ */
+
+Command.prototype.parseArgs = function(args, unknown) {
+ var name;
+
+ if (args.length) {
+ name = args[0];
+ if (this.listeners('command:' + name).length) {
+ this.emit('command:' + args.shift(), args, unknown);
+ } else {
+ this.emit('command:*', args);
+ }
+ } else {
+ outputHelpIfNecessary(this, unknown);
+
+ // If there were no args and we have unknown options,
+ // then they are extraneous and we need to error.
+ if (unknown.length > 0) {
+ this.unknownOption(unknown[0]);
+ }
+ }
+
+ return this;
+};
+
+/**
+ * Return an option matching `arg` if any.
+ *
+ * @param {String} arg
+ * @return {Option}
+ * @api private
+ */
+
+Command.prototype.optionFor = function(arg) {
+ for (var i = 0, len = this.options.length; i < len; ++i) {
+ if (this.options[i].is(arg)) {
+ return this.options[i];
+ }
+ }
+};
+
+/**
+ * Parse options from `argv` returning `argv`
+ * void of these options.
+ *
+ * @param {Array} argv
+ * @return {Array}
+ * @api public
+ */
+
+Command.prototype.parseOptions = function(argv) {
+ var args = [],
+ len = argv.length,
+ literal,
+ option,
+ arg;
+
+ var unknownOptions = [];
+
+ // parse options
+ for (var i = 0; i < len; ++i) {
+ arg = argv[i];
+
+ // literal args after --
+ if (literal) {
+ args.push(arg);
+ continue;
+ }
+
+ if (arg === '--') {
+ literal = true;
+ continue;
+ }
+
+ // find matching Option
+ option = this.optionFor(arg);
+
+ // option is defined
+ if (option) {
+ // requires arg
+ if (option.required) {
+ arg = argv[++i];
+ if (arg == null) return this.optionMissingArgument(option);
+ this.emit('option:' + option.name(), arg);
+ // optional arg
+ } else if (option.optional) {
+ arg = argv[i + 1];
+ if (arg == null || (arg[0] === '-' && arg !== '-')) {
+ arg = null;
+ } else {
+ ++i;
+ }
+ this.emit('option:' + option.name(), arg);
+ // bool
+ } else {
+ this.emit('option:' + option.name());
+ }
+ continue;
+ }
+
+ // looks like an option
+ if (arg.length > 1 && arg[0] === '-') {
+ unknownOptions.push(arg);
+
+ // If the next argument looks like it might be
+ // an argument for this option, we pass it on.
+ // If it isn't, then it'll simply be ignored
+ if ((i + 1) < argv.length && argv[i + 1][0] !== '-') {
+ unknownOptions.push(argv[++i]);
+ }
+ continue;
+ }
+
+ // arg
+ args.push(arg);
+ }
+
+ return { args: args, unknown: unknownOptions };
+};
+
+/**
+ * Return an object containing options as key-value pairs
+ *
+ * @return {Object}
+ * @api public
+ */
+Command.prototype.opts = function() {
+ var result = {},
+ len = this.options.length;
+
+ for (var i = 0; i < len; i++) {
+ var key = this.options[i].attributeName();
+ result[key] = key === this._versionOptionName ? this._version : this[key];
+ }
+ return result;
+};
+
+/**
+ * Argument `name` is missing.
+ *
+ * @param {String} name
+ * @api private
+ */
+
+Command.prototype.missingArgument = function(name) {
+ console.error();
+ console.error(" error: missing required argument `%s'", name);
+ console.error();
+ process.exit(1);
+};
+
+/**
+ * `Option` is missing an argument, but received `flag` or nothing.
+ *
+ * @param {String} option
+ * @param {String} flag
+ * @api private
+ */
+
+Command.prototype.optionMissingArgument = function(option, flag) {
+ console.error();
+ if (flag) {
+ console.error(" error: option `%s' argument missing, got `%s'", option.flags, flag);
+ } else {
+ console.error(" error: option `%s' argument missing", option.flags);
+ }
+ console.error();
+ process.exit(1);
+};
+
+/**
+ * Unknown option `flag`.
+ *
+ * @param {String} flag
+ * @api private
+ */
+
+Command.prototype.unknownOption = function(flag) {
+ if (this._allowUnknownOption) return;
+ console.error();
+ console.error(" error: unknown option `%s'", flag);
+ console.error();
+ process.exit(1);
+};
+
+/**
+ * Variadic argument with `name` is not the last argument as required.
+ *
+ * @param {String} name
+ * @api private
+ */
+
+Command.prototype.variadicArgNotLast = function(name) {
+ console.error();
+ console.error(" error: variadic arguments must be last `%s'", name);
+ console.error();
+ process.exit(1);
+};
+
+/**
+ * Set the program version to `str`.
+ *
+ * This method auto-registers the "-V, --version" flag
+ * which will print the version number when passed.
+ *
+ * @param {String} str
+ * @param {String} [flags]
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.version = function(str, flags) {
+ if (arguments.length === 0) return this._version;
+ this._version = str;
+ flags = flags || '-V, --version';
+ var versionOption = new Option(flags, 'output the version number');
+ this._versionOptionName = versionOption.long.substr(2) || 'version';
+ this.options.push(versionOption);
+ this.on('option:' + this._versionOptionName, function() {
+ process.stdout.write(str + '\n');
+ process.exit(0);
+ });
+ return this;
+};
+
+/**
+ * Set the description to `str`.
+ *
+ * @param {String} str
+ * @param {Object} argsDescription
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.description = function(str, argsDescription) {
+ if (arguments.length === 0) return this._description;
+ this._description = str;
+ this._argsDescription = argsDescription;
+ return this;
+};
+
+/**
+ * Set an alias for the command
+ *
+ * @param {String} alias
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.alias = function(alias) {
+ var command = this;
+ if (this.commands.length !== 0) {
+ command = this.commands[this.commands.length - 1];
+ }
+
+ if (arguments.length === 0) return command._alias;
+
+ if (alias === command._name) throw new Error('Command alias can\'t be the same as its name');
+
+ command._alias = alias;
+ return this;
+};
+
+/**
+ * Set / get the command usage `str`.
+ *
+ * @param {String} str
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.usage = function(str) {
+ var args = this._args.map(function(arg) {
+ return humanReadableArgName(arg);
+ });
+
+ var usage = '[options]' +
+ (this.commands.length ? ' [command]' : '') +
+ (this._args.length ? ' ' + args.join(' ') : '');
+
+ if (arguments.length === 0) return this._usage || usage;
+ this._usage = str;
+
+ return this;
+};
+
+/**
+ * Get or set the name of the command
+ *
+ * @param {String} str
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.name = function(str) {
+ if (arguments.length === 0) return this._name;
+ this._name = str;
+ return this;
+};
+
+/**
+ * Return prepared commands.
+ *
+ * @return {Array}
+ * @api private
+ */
+
+Command.prototype.prepareCommands = function() {
+ return this.commands.filter(function(cmd) {
+ return !cmd._noHelp;
+ }).map(function(cmd) {
+ var args = cmd._args.map(function(arg) {
+ return humanReadableArgName(arg);
+ }).join(' ');
+
+ return [
+ cmd._name +
+ (cmd._alias ? '|' + cmd._alias : '') +
+ (cmd.options.length ? ' [options]' : '') +
+ (args ? ' ' + args : ''),
+ cmd._description
+ ];
+ });
+};
+
+/**
+ * Return the largest command length.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.largestCommandLength = function() {
+ var commands = this.prepareCommands();
+ return commands.reduce(function(max, command) {
+ return Math.max(max, command[0].length);
+ }, 0);
+};
+
+/**
+ * Return the largest option length.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.largestOptionLength = function() {
+ var options = [].slice.call(this.options);
+ options.push({
+ flags: '-h, --help'
+ });
+ return options.reduce(function(max, option) {
+ return Math.max(max, option.flags.length);
+ }, 0);
+};
+
+/**
+ * Return the largest arg length.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.largestArgLength = function() {
+ return this._args.reduce(function(max, arg) {
+ return Math.max(max, arg.name.length);
+ }, 0);
+};
+
+/**
+ * Return the pad width.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.padWidth = function() {
+ var width = this.largestOptionLength();
+ if (this._argsDescription && this._args.length) {
+ if (this.largestArgLength() > width) {
+ width = this.largestArgLength();
+ }
+ }
+
+ if (this.commands && this.commands.length) {
+ if (this.largestCommandLength() > width) {
+ width = this.largestCommandLength();
+ }
+ }
+
+ return width;
+};
+
+/**
+ * Return help for options.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.optionHelp = function() {
+ var width = this.padWidth();
+
+ // Append the help information
+ return this.options.map(function(option) {
+ return pad(option.flags, width) + ' ' + option.description +
+ ((option.bool && option.defaultValue !== undefined) ? ' (default: ' + option.defaultValue + ')' : '');
+ }).concat([pad('-h, --help', width) + ' ' + 'output usage information'])
+ .join('\n');
+};
+
+/**
+ * Return command help documentation.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.commandHelp = function() {
+ if (!this.commands.length) return '';
+
+ var commands = this.prepareCommands();
+ var width = this.padWidth();
+
+ return [
+ ' Commands:',
+ '',
+ commands.map(function(cmd) {
+ var desc = cmd[1] ? ' ' + cmd[1] : '';
+ return (desc ? pad(cmd[0], width) : cmd[0]) + desc;
+ }).join('\n').replace(/^/gm, ' '),
+ ''
+ ].join('\n');
+};
+
+/**
+ * Return program help documentation.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.helpInformation = function() {
+ var desc = [];
+ if (this._description) {
+ desc = [
+ ' ' + this._description,
+ ''
+ ];
+
+ var argsDescription = this._argsDescription;
+ if (argsDescription && this._args.length) {
+ var width = this.padWidth();
+ desc.push(' Arguments:');
+ desc.push('');
+ this._args.forEach(function(arg) {
+ desc.push(' ' + pad(arg.name, width) + ' ' + argsDescription[arg.name]);
+ });
+ desc.push('');
+ }
+ }
+
+ var cmdName = this._name;
+ if (this._alias) {
+ cmdName = cmdName + '|' + this._alias;
+ }
+ var usage = [
+ '',
+ ' Usage: ' + cmdName + ' ' + this.usage(),
+ ''
+ ];
+
+ var cmds = [];
+ var commandHelp = this.commandHelp();
+ if (commandHelp) cmds = [commandHelp];
+
+ var options = [
+ ' Options:',
+ '',
+ '' + this.optionHelp().replace(/^/gm, ' '),
+ ''
+ ];
+
+ return usage
+ .concat(desc)
+ .concat(options)
+ .concat(cmds)
+ .join('\n');
+};
+
+/**
+ * Output help information for this command
+ *
+ * @api public
+ */
+
+Command.prototype.outputHelp = function(cb) {
+ if (!cb) {
+ cb = function(passthru) {
+ return passthru;
+ };
+ }
+ process.stdout.write(cb(this.helpInformation()));
+ this.emit('--help');
+};
+
+/**
+ * Output help information and exit.
+ *
+ * @api public
+ */
+
+Command.prototype.help = function(cb) {
+ this.outputHelp(cb);
+ process.exit();
+};
+
+/**
+ * Camel-case the given `flag`
+ *
+ * @param {String} flag
+ * @return {String}
+ * @api private
+ */
+
+function camelcase(flag) {
+ return flag.split('-').reduce(function(str, word) {
+ return str + word[0].toUpperCase() + word.slice(1);
+ });
+}
+
+/**
+ * Pad `str` to `width`.
+ *
+ * @param {String} str
+ * @param {Number} width
+ * @return {String}
+ * @api private
+ */
+
+function pad(str, width) {
+ var len = Math.max(0, width - str.length);
+ return str + Array(len + 1).join(' ');
+}
+
+/**
+ * Output help information if necessary
+ *
+ * @param {Command} command to output help for
+ * @param {Array} array of options to search for -h or --help
+ * @api private
+ */
+
+function outputHelpIfNecessary(cmd, options) {
+ options = options || [];
+ for (var i = 0; i < options.length; i++) {
+ if (options[i] === '--help' || options[i] === '-h') {
+ cmd.outputHelp();
+ process.exit(0);
+ }
+ }
+}
+
+/**
+ * Takes an argument an returns its human readable equivalent for help usage.
+ *
+ * @param {Object} arg
+ * @return {String}
+ * @api private
+ */
+
+function humanReadableArgName(arg) {
+ var nameOutput = arg.name + (arg.variadic === true ? '...' : '');
+
+ return arg.required
+ ? '<' + nameOutput + '>'
+ : '[' + nameOutput + ']';
+}
+
+// for versions before node v0.8 when there weren't `fs.existsSync`
+function exists(file) {
+ try {
+ if (fs.statSync(file).isFile()) {
+ return true;
+ }
+ } catch (e) {
+ return false;
+ }
+}
projects / VSoRC / .git / blobdiff