1138 lines
25 KiB
JavaScript
1138 lines
25 KiB
JavaScript
/**
|
|
* 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');
|
|
|
|
/**
|
|
* 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-', '');
|
|
};
|
|
|
|
/**
|
|
* Check if `arg` matches the short or long flag.
|
|
*
|
|
* @param {String} arg
|
|
* @return {Boolean}
|
|
* @api private
|
|
*/
|
|
|
|
Option.prototype.is = function(arg) {
|
|
return arg == this.short || arg == this.long;
|
|
};
|
|
|
|
/**
|
|
* 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 || '';
|
|
}
|
|
|
|
/**
|
|
* Inherit from `EventEmitter.prototype`.
|
|
*/
|
|
|
|
Command.prototype.__proto__ = EventEmitter.prototype;
|
|
|
|
/**
|
|
* 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) {
|
|
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 && null == args[i]) {
|
|
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 = camelcase(oname);
|
|
|
|
// 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 (false == option.bool || option.optional || option.required) {
|
|
// when --no-* we make sure default is true
|
|
if (false == option.bool) defaultValue = true;
|
|
// preassign only if we have a default
|
|
if (undefined !== defaultValue) self[name] = 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 (null !== val && fn) val = fn(val, undefined === self[name]
|
|
? defaultValue
|
|
: self[name]);
|
|
|
|
// unassigned or bool
|
|
if ('boolean' == typeof self[name] || 'undefined' == typeof self[name]) {
|
|
// if no value, bool true, and we have a default, then use it!
|
|
if (null == val) {
|
|
self[name] = option.bool
|
|
? defaultValue || true
|
|
: false;
|
|
} else {
|
|
self[name] = val;
|
|
}
|
|
} else if (null !== val) {
|
|
// 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 ('help' == args[0] && 1 == args.length) this.help();
|
|
|
|
// <cmd> --help
|
|
if ('help' == args[0]) {
|
|
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('node', 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 (null == arg) return this.optionMissingArgument(option);
|
|
this.emit('option:' + option.name(), arg);
|
|
// optional arg
|
|
} else if (option.optional) {
|
|
arg = argv[i+1];
|
|
if (null == arg || ('-' == 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 (argv[i+1] && '-' != 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 = camelcase(this.options[i].name());
|
|
result[key] = key === 'version' ? 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 (0 == arguments.length) return this._version;
|
|
this._version = str;
|
|
flags = flags || '-V, --version';
|
|
this.option(flags, 'output the version number');
|
|
this.on('option:version', function() {
|
|
process.stdout.write(str + '\n');
|
|
process.exit(0);
|
|
});
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Set the description to `str`.
|
|
*
|
|
* @param {String} str
|
|
* @return {String|Command}
|
|
* @api public
|
|
*/
|
|
|
|
Command.prototype.description = function(str) {
|
|
if (0 === arguments.length) return this._description;
|
|
this._description = str;
|
|
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;
|
|
|
|
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 (0 == arguments.length) 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 (0 === arguments.length) return this._name;
|
|
this._name = str;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Return the largest option length.
|
|
*
|
|
* @return {Number}
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype.largestOptionLength = function() {
|
|
return this.options.reduce(function(max, option) {
|
|
return Math.max(max, option.flags.length);
|
|
}, 0);
|
|
};
|
|
|
|
/**
|
|
* Return help for options.
|
|
*
|
|
* @return {String}
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype.optionHelp = function() {
|
|
var width = this.largestOptionLength();
|
|
|
|
// Append the help information
|
|
return this.options.map(function(option) {
|
|
return pad(option.flags, width) + ' ' + option.description;
|
|
}).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.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
|
|
, cmd._description
|
|
];
|
|
});
|
|
|
|
var width = commands.reduce(function(max, command) {
|
|
return Math.max(max, command[0].length);
|
|
}, 0);
|
|
|
|
return [
|
|
''
|
|
, ' Commands:'
|
|
, ''
|
|
, commands.map(function(cmd) {
|
|
var desc = cmd[1] ? ' ' + cmd[1] : '';
|
|
return pad(cmd[0], width) + 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 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;
|
|
}
|
|
}
|
|
|