1650 lines
42 KiB
JavaScript
1650 lines
42 KiB
JavaScript
/**
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* Module dependencies.
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*/
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var EventEmitter = require('events').EventEmitter;
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var spawn = require('child_process').spawn;
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var path = require('path');
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var dirname = path.dirname;
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var basename = path.basename;
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var fs = require('fs');
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/**
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* Inherit `Command` from `EventEmitter.prototype`.
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*/
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require('util').inherits(Command, EventEmitter);
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/**
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* Expose the root command.
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*/
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exports = module.exports = new Command();
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/**
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* Expose `Command`.
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*/
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exports.Command = Command;
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/**
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* Expose `Option`.
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*/
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exports.Option = Option;
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/**
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* Initialize a new `Option` with the given `flags` and `description`.
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*
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* @param {String} flags
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* @param {String} description
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* @api public
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*/
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function Option(flags, description) {
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this.flags = flags;
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this.required = flags.indexOf('<') >= 0; // A value must be supplied when the option is specified.
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this.optional = flags.indexOf('[') >= 0; // A value is optional when the option is specified.
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this.mandatory = false; // The option must have a value after parsing, which usually means it must be specified on command line.
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this.negate = flags.indexOf('-no-') !== -1;
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flags = flags.split(/[ ,|]+/);
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if (flags.length > 1 && !/^[[<]/.test(flags[1])) this.short = flags.shift();
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this.long = flags.shift();
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this.description = description || '';
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}
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/**
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* Return option name.
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*
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* @return {String}
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* @api private
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*/
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Option.prototype.name = function() {
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return this.long.replace(/^--/, '');
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};
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/**
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* Return option name, in a camelcase format that can be used
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* as a object attribute key.
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*
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* @return {String}
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* @api private
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*/
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Option.prototype.attributeName = function() {
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return camelcase(this.name().replace(/^no-/, ''));
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};
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/**
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* Check if `arg` matches the short or long flag.
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*
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* @param {String} arg
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* @return {Boolean}
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* @api private
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*/
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Option.prototype.is = function(arg) {
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return this.short === arg || this.long === arg;
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};
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/**
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* CommanderError class
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* @class
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*/
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class CommanderError extends Error {
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/**
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* Constructs the CommanderError class
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* @param {Number} exitCode suggested exit code which could be used with process.exit
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* @param {String} code an id string representing the error
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* @param {String} message human-readable description of the error
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* @constructor
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*/
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constructor(exitCode, code, message) {
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super(message);
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// properly capture stack trace in Node.js
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Error.captureStackTrace(this, this.constructor);
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this.name = this.constructor.name;
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this.code = code;
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this.exitCode = exitCode;
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}
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}
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exports.CommanderError = CommanderError;
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/**
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* Initialize a new `Command`.
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*
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* @param {String} [name]
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* @api public
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*/
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function Command(name) {
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this.commands = [];
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this.options = [];
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this._execs = new Set();
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this._allowUnknownOption = false;
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this._args = [];
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this._name = name || '';
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this._optionValues = {};
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this._storeOptionsAsProperties = true; // backwards compatible by default
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this._passCommandToAction = true; // backwards compatible by default
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this._actionResults = [];
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this._helpFlags = '-h, --help';
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this._helpDescription = 'output usage information';
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this._helpShortFlag = '-h';
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this._helpLongFlag = '--help';
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}
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/**
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* Define a command.
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*
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* There are two styles of command: pay attention to where to put the description.
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*
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* Examples:
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*
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* // Command implemented using action handler (description is supplied separately to `.command`)
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* program
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* .command('clone <source> [destination]')
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* .description('clone a repository into a newly created directory')
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* .action((source, destination) => {
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* console.log('clone command called');
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* });
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*
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* // Command implemented using separate executable file (description is second parameter to `.command`)
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* program
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* .command('start <service>', 'start named service')
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* .command('stop [service]', 'stop named service, or all if no name supplied');
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*
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* @param {string} nameAndArgs - command name and arguments, args are `<required>` or `[optional]` and last may also be `variadic...`
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* @param {Object|string} [actionOptsOrExecDesc] - configuration options (for action), or description (for executable)
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* @param {Object} [execOpts] - configuration options (for executable)
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* @return {Command} returns new command for action handler, or top-level command for executable command
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* @api public
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*/
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Command.prototype.command = function(nameAndArgs, actionOptsOrExecDesc, execOpts) {
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var desc = actionOptsOrExecDesc;
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var opts = execOpts;
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if (typeof desc === 'object' && desc !== null) {
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opts = desc;
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desc = null;
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}
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opts = opts || {};
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var args = nameAndArgs.split(/ +/);
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var cmd = new Command(args.shift());
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if (desc) {
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cmd.description(desc);
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this.executables = true;
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this._execs.add(cmd._name);
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if (opts.isDefault) this.defaultExecutable = cmd._name;
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}
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cmd._noHelp = !!opts.noHelp;
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cmd._helpFlags = this._helpFlags;
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cmd._helpDescription = this._helpDescription;
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cmd._helpShortFlag = this._helpShortFlag;
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cmd._helpLongFlag = this._helpLongFlag;
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cmd._exitCallback = this._exitCallback;
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cmd._storeOptionsAsProperties = this._storeOptionsAsProperties;
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cmd._passCommandToAction = this._passCommandToAction;
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cmd._executableFile = opts.executableFile; // Custom name for executable file
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this.commands.push(cmd);
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cmd.parseExpectedArgs(args);
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cmd.parent = this;
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if (desc) return this;
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return cmd;
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};
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/**
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* Define argument syntax for the top-level command.
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*
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* @api public
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*/
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Command.prototype.arguments = function(desc) {
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return this.parseExpectedArgs(desc.split(/ +/));
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};
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/**
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* Add an implicit `help [cmd]` subcommand
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* which invokes `--help` for the given command.
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*
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* @api private
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*/
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Command.prototype.addImplicitHelpCommand = function() {
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this.command('help [cmd]', 'display help for [cmd]');
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};
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/**
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* Parse expected `args`.
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*
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* For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`.
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*
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* @param {Array} args
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* @return {Command} for chaining
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* @api public
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*/
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Command.prototype.parseExpectedArgs = function(args) {
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if (!args.length) return;
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var self = this;
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args.forEach(function(arg) {
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var argDetails = {
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required: false,
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name: '',
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variadic: false
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};
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switch (arg[0]) {
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case '<':
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argDetails.required = true;
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argDetails.name = arg.slice(1, -1);
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break;
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case '[':
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argDetails.name = arg.slice(1, -1);
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break;
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}
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if (argDetails.name.length > 3 && argDetails.name.slice(-3) === '...') {
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argDetails.variadic = true;
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argDetails.name = argDetails.name.slice(0, -3);
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}
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if (argDetails.name) {
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self._args.push(argDetails);
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}
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});
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return this;
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};
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/**
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* Register callback to use as replacement for calling process.exit.
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*
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* @param {Function} [fn] optional callback which will be passed a CommanderError, defaults to throwing
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* @return {Command} for chaining
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* @api public
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*/
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Command.prototype.exitOverride = function(fn) {
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if (fn) {
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this._exitCallback = fn;
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} else {
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this._exitCallback = function(err) {
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if (err.code !== 'commander.executeSubCommandAsync') {
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throw err;
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} else {
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// Async callback from spawn events, not useful to throw.
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}
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};
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}
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return this;
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};
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/**
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* Call process.exit, and _exitCallback if defined.
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*
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* @param {Number} exitCode exit code for using with process.exit
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* @param {String} code an id string representing the error
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* @param {String} message human-readable description of the error
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* @return never
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* @api private
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*/
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Command.prototype._exit = function(exitCode, code, message) {
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if (this._exitCallback) {
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this._exitCallback(new CommanderError(exitCode, code, message));
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// Expecting this line is not reached.
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}
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process.exit(exitCode);
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};
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/**
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* Register callback `fn` for the command.
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*
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* Examples:
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*
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* program
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* .command('help')
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* .description('display verbose help')
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* .action(function() {
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* // output help here
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* });
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*
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* @param {Function} fn
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* @return {Command} for chaining
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* @api public
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*/
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Command.prototype.action = function(fn) {
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var self = this;
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var listener = function(args, unknown) {
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// Parse any so-far unknown options
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args = args || [];
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unknown = unknown || [];
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var parsed = self.parseOptions(unknown);
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// Output help if necessary
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outputHelpIfRequested(self, parsed.unknown);
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self._checkForMissingMandatoryOptions();
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// If there are still any unknown options, then we simply
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// die, unless someone asked for help, in which case we give it
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// to them, and then we die.
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if (parsed.unknown.length > 0) {
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self.unknownOption(parsed.unknown[0]);
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}
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// Leftover arguments need to be pushed back. Fixes issue #56
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if (parsed.args.length) args = parsed.args.concat(args);
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self._args.forEach(function(arg, i) {
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if (arg.required && args[i] == null) {
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self.missingArgument(arg.name);
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} else if (arg.variadic) {
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if (i !== self._args.length - 1) {
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self.variadicArgNotLast(arg.name);
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}
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args[i] = args.splice(i);
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}
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});
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// The .action callback takes an extra parameter which is the command itself.
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var expectedArgsCount = self._args.length;
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var actionArgs = args.slice(0, expectedArgsCount);
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if (self._passCommandToAction) {
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actionArgs[expectedArgsCount] = self;
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} else {
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actionArgs[expectedArgsCount] = self.opts();
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}
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// Add the extra arguments so available too.
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if (args.length > expectedArgsCount) {
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actionArgs.push(args.slice(expectedArgsCount));
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}
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const actionResult = fn.apply(self, actionArgs);
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// Remember result in case it is async. Assume parseAsync getting called on root.
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let rootCommand = self;
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while (rootCommand.parent) {
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rootCommand = rootCommand.parent;
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}
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rootCommand._actionResults.push(actionResult);
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};
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var parent = this.parent || this;
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var name = parent === this ? '*' : this._name;
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parent.on('command:' + name, listener);
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if (this._alias) parent.on('command:' + this._alias, listener);
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return this;
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};
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/**
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* Internal implementation shared by .option() and .requiredOption()
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*
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* @param {Object} config
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* @param {String} flags
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* @param {String} description
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* @param {Function|*} [fn] - custom option processing function or default vaue
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* @param {*} [defaultValue]
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* @return {Command} for chaining
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* @api private
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*/
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Command.prototype._optionEx = function(config, flags, description, fn, defaultValue) {
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var self = this,
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option = new Option(flags, description),
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oname = option.name(),
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name = option.attributeName();
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option.mandatory = !!config.mandatory;
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// default as 3rd arg
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if (typeof fn !== 'function') {
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if (fn instanceof RegExp) {
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// This is a bit simplistic (especially no error messages), and probably better handled by caller using custom option processing.
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// No longer documented in README, but still present for backwards compatibility.
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var regex = fn;
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fn = function(val, def) {
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var m = regex.exec(val);
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return m ? m[0] : def;
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};
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} else {
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defaultValue = fn;
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fn = null;
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}
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}
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// preassign default value for --no-*, [optional], <required>, or plain flag if boolean value
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if (option.negate || option.optional || option.required || typeof defaultValue === 'boolean') {
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// when --no-foo we make sure default is true, unless a --foo option is already defined
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if (option.negate) {
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const positiveLongFlag = option.long.replace(/^--no-/, '--');
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defaultValue = self.optionFor(positiveLongFlag) ? self._getOptionValue(name) : true;
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}
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// preassign only if we have a default
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if (defaultValue !== undefined) {
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self._setOptionValue(name, defaultValue);
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option.defaultValue = defaultValue;
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}
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}
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// register the option
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this.options.push(option);
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// when it's passed assign the value
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// and conditionally invoke the callback
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this.on('option:' + oname, function(val) {
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// coercion
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if (val !== null && fn) {
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val = fn(val, self._getOptionValue(name) === undefined ? defaultValue : self._getOptionValue(name));
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}
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// unassigned or boolean value
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if (typeof self._getOptionValue(name) === 'boolean' || typeof self._getOptionValue(name) === 'undefined') {
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// if no value, negate false, and we have a default, then use it!
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if (val == null) {
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self._setOptionValue(name, option.negate
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? false
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: defaultValue || true);
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} else {
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self._setOptionValue(name, val);
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}
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} else if (val !== null) {
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// reassign
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self._setOptionValue(name, option.negate ? false : val);
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}
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});
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return this;
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};
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/**
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* Define option with `flags`, `description` and optional
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* coercion `fn`.
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*
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* The `flags` string should contain both the short and long flags,
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* separated by comma, a pipe or space. The following are all valid
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* all will output this way when `--help` is used.
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*
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* "-p, --pepper"
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* "-p|--pepper"
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* "-p --pepper"
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*
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* Examples:
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*
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* // simple boolean defaulting to undefined
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* program.option('-p, --pepper', 'add pepper');
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*
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* program.pepper
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* // => undefined
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*
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* --pepper
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* program.pepper
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* // => true
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*
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* // simple boolean defaulting to true (unless non-negated option is also defined)
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* program.option('-C, --no-cheese', 'remove cheese');
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*
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* program.cheese
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* // => true
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*
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* --no-cheese
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* program.cheese
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* // => false
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*
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* // required argument
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* program.option('-C, --chdir <path>', 'change the working directory');
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*
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* --chdir /tmp
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* program.chdir
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* // => "/tmp"
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*
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* // optional argument
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* program.option('-c, --cheese [type]', 'add cheese [marble]');
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*
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* @param {String} flags
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* @param {String} description
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* @param {Function|*} [fn] - custom option processing function or default vaue
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* @param {*} [defaultValue]
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* @return {Command} for chaining
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* @api public
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*/
|
|
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Command.prototype.option = function(flags, description, fn, defaultValue) {
|
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return this._optionEx({}, flags, description, fn, defaultValue);
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};
|
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|
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/*
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|
* Add a required option which must have a value after parsing. This usually means
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* the option must be specified on the command line. (Otherwise the same as .option().)
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*
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* The `flags` string should contain both the short and long flags, separated by comma, a pipe or space.
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*
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* @param {String} flags
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* @param {String} description
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* @param {Function|*} [fn] - custom option processing function or default vaue
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* @param {*} [defaultValue]
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* @return {Command} for chaining
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* @api public
|
|
*/
|
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Command.prototype.requiredOption = function(flags, description, fn, defaultValue) {
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return this._optionEx({ mandatory: true }, flags, description, fn, defaultValue);
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};
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|
|
/**
|
|
* Allow unknown options on the command line.
|
|
*
|
|
* @param {Boolean} arg if `true` or omitted, no error will be thrown
|
|
* for unknown options.
|
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* @api public
|
|
*/
|
|
Command.prototype.allowUnknownOption = function(arg) {
|
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this._allowUnknownOption = arguments.length === 0 || arg;
|
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return this;
|
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};
|
|
|
|
/**
|
|
* Whether to store option values as properties on command object,
|
|
* or store separately (specify false). In both cases the option values can be accessed using .opts().
|
|
*
|
|
* @param {boolean} value
|
|
* @return {Command} Command for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Command.prototype.storeOptionsAsProperties = function(value) {
|
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this._storeOptionsAsProperties = (value === undefined) || value;
|
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if (this.options.length) {
|
|
// This is for programmer, not end user.
|
|
console.error('Commander usage error: call storeOptionsAsProperties before adding options');
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Whether to pass command to action handler,
|
|
* or just the options (specify false).
|
|
*
|
|
* @param {boolean} value
|
|
* @return {Command} Command for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Command.prototype.passCommandToAction = function(value) {
|
|
this._passCommandToAction = (value === undefined) || value;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Store option value
|
|
*
|
|
* @param {String} key
|
|
* @param {Object} value
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype._setOptionValue = function(key, value) {
|
|
if (this._storeOptionsAsProperties) {
|
|
this[key] = value;
|
|
} else {
|
|
this._optionValues[key] = value;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Retrieve option value
|
|
*
|
|
* @param {String} key
|
|
* @return {Object} value
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype._getOptionValue = function(key) {
|
|
if (this._storeOptionsAsProperties) {
|
|
return this[key];
|
|
}
|
|
return this._optionValues[key];
|
|
};
|
|
|
|
/**
|
|
* Parse `argv`, setting 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(this._helpLongFlag);
|
|
}
|
|
|
|
// process argv
|
|
var normalized = this.normalize(argv.slice(2));
|
|
var parsed = this.parseOptions(normalized);
|
|
var args = this.args = parsed.args;
|
|
|
|
var result = this.parseArgs(this.args, parsed.unknown);
|
|
|
|
if (args[0] === 'help' && args.length === 1) this.help();
|
|
|
|
// Note for future: we could return early if we found an action handler in parseArgs, as none of following code needed?
|
|
|
|
// <cmd> --help
|
|
if (args[0] === 'help') {
|
|
args[0] = args[1];
|
|
args[1] = this._helpLongFlag;
|
|
} else {
|
|
// If calling through to executable subcommand we could check for help flags before failing,
|
|
// but a somewhat unlikely case since program options not passed to executable subcommands.
|
|
// Wait for reports to see if check needed and what usage pattern is.
|
|
this._checkForMissingMandatoryOptions();
|
|
}
|
|
|
|
// executable sub-commands
|
|
// (Debugging note for future: args[0] is not right if an action has been called)
|
|
var name = result.args[0];
|
|
var subCommand = null;
|
|
|
|
// Look for subcommand
|
|
if (name) {
|
|
subCommand = this.commands.find(function(command) {
|
|
return command._name === name;
|
|
});
|
|
}
|
|
|
|
// Look for alias
|
|
if (!subCommand && name) {
|
|
subCommand = this.commands.find(function(command) {
|
|
return command.alias() === name;
|
|
});
|
|
if (subCommand) {
|
|
name = subCommand._name;
|
|
args[0] = name;
|
|
}
|
|
}
|
|
|
|
// Look for default subcommand
|
|
if (!subCommand && this.defaultExecutable) {
|
|
name = this.defaultExecutable;
|
|
args.unshift(name);
|
|
subCommand = this.commands.find(function(command) {
|
|
return command._name === name;
|
|
});
|
|
}
|
|
|
|
if (this._execs.has(name)) {
|
|
return this.executeSubCommand(argv, args, parsed.unknown, subCommand ? subCommand._executableFile : undefined);
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Parse `argv`, setting options and invoking commands when defined.
|
|
*
|
|
* Use parseAsync instead of parse if any of your action handlers are async. Returns a Promise.
|
|
*
|
|
* @param {Array} argv
|
|
* @return {Promise}
|
|
* @api public
|
|
*/
|
|
Command.prototype.parseAsync = function(argv) {
|
|
this.parse(argv);
|
|
return Promise.all(this._actionResults);
|
|
};
|
|
|
|
/**
|
|
* Execute a sub-command executable.
|
|
*
|
|
* @param {Array} argv
|
|
* @param {Array} args
|
|
* @param {Array} unknown
|
|
* @param {String} executableFile
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype.executeSubCommand = function(argv, args, unknown, executableFile) {
|
|
args = args.concat(unknown);
|
|
|
|
if (!args.length) this.help();
|
|
|
|
var isExplicitJS = false; // Whether to use node to launch "executable"
|
|
|
|
// executable
|
|
var pm = argv[1];
|
|
// name of the subcommand, like `pm-install`
|
|
var bin = basename(pm, path.extname(pm)) + '-' + args[0];
|
|
if (executableFile != null) {
|
|
bin = executableFile;
|
|
// Check for same extensions as we scan for below so get consistent launch behaviour.
|
|
var executableExt = path.extname(executableFile);
|
|
isExplicitJS = executableExt === '.js' || executableExt === '.ts' || executableExt === '.mjs';
|
|
}
|
|
|
|
// In case of globally installed, get the base dir where executable
|
|
// subcommand file should be located at
|
|
var baseDir;
|
|
|
|
var resolvedLink = fs.realpathSync(pm);
|
|
|
|
baseDir = dirname(resolvedLink);
|
|
|
|
// prefer local `./<bin>` to bin in the $PATH
|
|
var localBin = path.join(baseDir, bin);
|
|
|
|
// whether bin file is a js script with explicit `.js` or `.ts` extension
|
|
if (exists(localBin + '.js')) {
|
|
bin = localBin + '.js';
|
|
isExplicitJS = true;
|
|
} else if (exists(localBin + '.ts')) {
|
|
bin = localBin + '.ts';
|
|
isExplicitJS = true;
|
|
} else if (exists(localBin + '.mjs')) {
|
|
bin = localBin + '.mjs';
|
|
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 = incrementNodeInspectorPort(process.execArgv).concat(args);
|
|
|
|
proc = spawn(process.argv[0], args, { stdio: 'inherit' });
|
|
} else {
|
|
proc = spawn(bin, args, { stdio: 'inherit' });
|
|
}
|
|
} else {
|
|
args.unshift(bin);
|
|
// add executable arguments to spawn
|
|
args = incrementNodeInspectorPort(process.execArgv).concat(args);
|
|
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);
|
|
}
|
|
});
|
|
});
|
|
|
|
// By default terminate process when spawned process terminates.
|
|
// Suppressing the exit if exitCallback defined is a bit messy and of limited use, but does allow process to stay running!
|
|
const exitCallback = this._exitCallback;
|
|
if (!exitCallback) {
|
|
proc.on('close', process.exit.bind(process));
|
|
} else {
|
|
proc.on('close', () => {
|
|
exitCallback(new CommanderError(process.exitCode || 0, 'commander.executeSubCommandAsync', '(close)'));
|
|
});
|
|
}
|
|
proc.on('error', function(err) {
|
|
if (err.code === 'ENOENT') {
|
|
console.error('error: %s(1) does not exist, try --help', bin);
|
|
} else if (err.code === 'EACCES') {
|
|
console.error('error: %s(1) not executable. try chmod or run with root', bin);
|
|
}
|
|
if (!exitCallback) {
|
|
process.exit(1);
|
|
} else {
|
|
const wrappedError = new CommanderError(1, 'commander.executeSubCommandAsync', '(error)');
|
|
wrappedError.nestedError = err;
|
|
exitCallback(wrappedError);
|
|
}
|
|
});
|
|
|
|
// 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,
|
|
short,
|
|
opt;
|
|
|
|
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 > 2 && arg[0] === '-' && arg[1] !== '-') {
|
|
short = arg.slice(0, 2);
|
|
opt = this.optionFor(short);
|
|
if (opt && (opt.required || opt.optional)) {
|
|
ret.push(short);
|
|
ret.push(arg.slice(2));
|
|
} else {
|
|
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, unknown);
|
|
}
|
|
} else {
|
|
outputHelpIfRequested(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.defaultExecutable) {
|
|
this.unknownOption(unknown[0]);
|
|
}
|
|
if (this.commands.length === 0 &&
|
|
this._args.filter(function(a) { return a.required; }).length === 0) {
|
|
this.emit('command:*');
|
|
}
|
|
}
|
|
|
|
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];
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Display an error message if a mandatory option does not have a value.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype._checkForMissingMandatoryOptions = function() {
|
|
// Walk up hierarchy so can call from action handler after checking for displaying help.
|
|
for (var cmd = this; cmd; cmd = cmd.parent) {
|
|
cmd.options.forEach((anOption) => {
|
|
if (anOption.mandatory && (cmd._getOptionValue(anOption.attributeName()) === undefined)) {
|
|
cmd.missingMandatoryOptionValue(anOption);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Parse options from `argv` returning `argv`
|
|
* void of these options.
|
|
*
|
|
* @param {Array} argv
|
|
* @return {{args: Array, unknown: 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);
|
|
// flag
|
|
} 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] !== '-' || argv[i + 1] === '-')) {
|
|
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() {
|
|
if (this._storeOptionsAsProperties) {
|
|
// Preserve original behaviour so backwards compatible when still using properties
|
|
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;
|
|
}
|
|
|
|
return this._optionValues;
|
|
};
|
|
|
|
/**
|
|
* Argument `name` is missing.
|
|
*
|
|
* @param {String} name
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype.missingArgument = function(name) {
|
|
const message = `error: missing required argument '${name}'`;
|
|
console.error(message);
|
|
this._exit(1, 'commander.missingArgument', message);
|
|
};
|
|
|
|
/**
|
|
* `Option` is missing an argument, but received `flag` or nothing.
|
|
*
|
|
* @param {Option} option
|
|
* @param {String} [flag]
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype.optionMissingArgument = function(option, flag) {
|
|
let message;
|
|
if (flag) {
|
|
message = `error: option '${option.flags}' argument missing, got '${flag}'`;
|
|
} else {
|
|
message = `error: option '${option.flags}' argument missing`;
|
|
}
|
|
console.error(message);
|
|
this._exit(1, 'commander.optionMissingArgument', message);
|
|
};
|
|
|
|
/**
|
|
* `Option` does not have a value, and is a mandatory option.
|
|
*
|
|
* @param {Option} option
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype.missingMandatoryOptionValue = function(option) {
|
|
const message = `error: required option '${option.flags}' not specified`;
|
|
console.error(message);
|
|
this._exit(1, 'commander.missingMandatoryOptionValue', message);
|
|
};
|
|
|
|
/**
|
|
* Unknown option `flag`.
|
|
*
|
|
* @param {String} flag
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype.unknownOption = function(flag) {
|
|
if (this._allowUnknownOption) return;
|
|
const message = `error: unknown option '${flag}'`;
|
|
console.error(message);
|
|
this._exit(1, 'commander.unknownOption', message);
|
|
};
|
|
|
|
/**
|
|
* Variadic argument with `name` is not the last argument as required.
|
|
*
|
|
* @param {String} name
|
|
* @api private
|
|
*/
|
|
|
|
Command.prototype.variadicArgNotLast = function(name) {
|
|
const message = `error: variadic arguments must be last '${name}'`;
|
|
console.error(message);
|
|
this._exit(1, 'commander.variadicArgNotLast', message);
|
|
};
|
|
|
|
/**
|
|
* Set the program version to `str`.
|
|
*
|
|
* This method auto-registers the "-V, --version" flag
|
|
* which will print the version number when passed.
|
|
*
|
|
* You can optionally supply the flags and description to override the defaults.
|
|
*
|
|
* @param {String} str
|
|
* @param {String} [flags]
|
|
* @param {String} [description]
|
|
* @return {Command} for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Command.prototype.version = function(str, flags, description) {
|
|
if (arguments.length === 0) return this._version;
|
|
this._version = str;
|
|
flags = flags || '-V, --version';
|
|
description = description || 'output the version number';
|
|
var versionOption = new Option(flags, description);
|
|
this._versionOptionName = versionOption.long.substr(2) || 'version';
|
|
this.options.push(versionOption);
|
|
var self = this;
|
|
this.on('option:' + this._versionOptionName, function() {
|
|
process.stdout.write(str + '\n');
|
|
self._exit(0, 'commander.version', str);
|
|
});
|
|
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: this._helpFlags
|
|
});
|
|
|
|
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();
|
|
|
|
var columns = process.stdout.columns || 80;
|
|
var descriptionWidth = columns - width - 4;
|
|
|
|
// Append the help information
|
|
return this.options.map(function(option) {
|
|
const fullDesc = option.description +
|
|
((!option.negate && option.defaultValue !== undefined) ? ' (default: ' + JSON.stringify(option.defaultValue) + ')' : '');
|
|
return pad(option.flags, width) + ' ' + optionalWrap(fullDesc, descriptionWidth, width + 2);
|
|
}).concat([pad(this._helpFlags, width) + ' ' + optionalWrap(this._helpDescription, descriptionWidth, width + 2)])
|
|
.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();
|
|
|
|
var columns = process.stdout.columns || 80;
|
|
var descriptionWidth = columns - width - 4;
|
|
|
|
return [
|
|
'Commands:',
|
|
commands.map(function(cmd) {
|
|
var desc = cmd[1] ? ' ' + cmd[1] : '';
|
|
return (desc ? pad(cmd[0], width) : cmd[0]) + optionalWrap(desc, descriptionWidth, width + 2);
|
|
}).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();
|
|
var columns = process.stdout.columns || 80;
|
|
var descriptionWidth = columns - width - 5;
|
|
desc.push('Arguments:');
|
|
desc.push('');
|
|
this._args.forEach(function(arg) {
|
|
desc.push(' ' + pad(arg.name, width) + ' ' + wrap(argsDescription[arg.name], descriptionWidth, width + 4));
|
|
});
|
|
desc.push('');
|
|
}
|
|
}
|
|
|
|
var cmdName = this._name;
|
|
if (this._alias) {
|
|
cmdName = cmdName + '|' + this._alias;
|
|
}
|
|
var parentCmdNames = '';
|
|
for (var parentCmd = this.parent; parentCmd; parentCmd = parentCmd.parent) {
|
|
parentCmdNames = parentCmd.name() + ' ' + parentCmdNames;
|
|
}
|
|
var usage = [
|
|
'Usage: ' + parentCmdNames + 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.
|
|
*
|
|
* When listener(s) are available for the helpLongFlag
|
|
* those callbacks are invoked.
|
|
*
|
|
* @api public
|
|
*/
|
|
|
|
Command.prototype.outputHelp = function(cb) {
|
|
if (!cb) {
|
|
cb = function(passthru) {
|
|
return passthru;
|
|
};
|
|
}
|
|
const cbOutput = cb(this.helpInformation());
|
|
if (typeof cbOutput !== 'string' && !Buffer.isBuffer(cbOutput)) {
|
|
throw new Error('outputHelp callback must return a string or a Buffer');
|
|
}
|
|
process.stdout.write(cbOutput);
|
|
this.emit(this._helpLongFlag);
|
|
};
|
|
|
|
/**
|
|
* You can pass in flags and a description to override the help
|
|
* flags and help description for your command.
|
|
*
|
|
* @param {String} [flags]
|
|
* @param {String} [description]
|
|
* @return {Command}
|
|
* @api public
|
|
*/
|
|
|
|
Command.prototype.helpOption = function(flags, description) {
|
|
this._helpFlags = flags || this._helpFlags;
|
|
this._helpDescription = description || this._helpDescription;
|
|
|
|
var splitFlags = this._helpFlags.split(/[ ,|]+/);
|
|
|
|
if (splitFlags.length > 1) this._helpShortFlag = splitFlags.shift();
|
|
|
|
this._helpLongFlag = splitFlags.shift();
|
|
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Output help information and exit.
|
|
*
|
|
* @param {Function} [cb]
|
|
* @api public
|
|
*/
|
|
|
|
Command.prototype.help = function(cb) {
|
|
this.outputHelp(cb);
|
|
// exitCode: preserving original behaviour which was calling process.exit()
|
|
// message: do not have all displayed text available so only passing placeholder.
|
|
this._exit(process.exitCode || 0, 'commander.help', '(outputHelp)');
|
|
};
|
|
|
|
/**
|
|
* 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(' ');
|
|
}
|
|
|
|
/**
|
|
* Wraps the given string with line breaks at the specified width while breaking
|
|
* words and indenting every but the first line on the left.
|
|
*
|
|
* @param {String} str
|
|
* @param {Number} width
|
|
* @param {Number} indent
|
|
* @return {String}
|
|
* @api private
|
|
*/
|
|
function wrap(str, width, indent) {
|
|
var regex = new RegExp('.{1,' + (width - 1) + '}([\\s\u200B]|$)|[^\\s\u200B]+?([\\s\u200B]|$)', 'g');
|
|
var lines = str.match(regex) || [];
|
|
return lines.map(function(line, i) {
|
|
if (line.slice(-1) === '\n') {
|
|
line = line.slice(0, line.length - 1);
|
|
}
|
|
return ((i > 0 && indent) ? Array(indent + 1).join(' ') : '') + line.trimRight();
|
|
}).join('\n');
|
|
}
|
|
|
|
/**
|
|
* Optionally wrap the given str to a max width of width characters per line
|
|
* while indenting with indent spaces. Do not wrap if insufficient width or
|
|
* string is manually formatted.
|
|
*
|
|
* @param {String} str
|
|
* @param {Number} width
|
|
* @param {Number} indent
|
|
* @return {String}
|
|
* @api private
|
|
*/
|
|
function optionalWrap(str, width, indent) {
|
|
// Detect manually wrapped and indented strings by searching for line breaks
|
|
// followed by multiple spaces/tabs.
|
|
if (str.match(/[\n]\s+/)) return str;
|
|
// Do not wrap to narrow columns (or can end up with a word per line).
|
|
const minWidth = 40;
|
|
if (width < minWidth) return str;
|
|
|
|
return wrap(str, width, indent);
|
|
}
|
|
|
|
/**
|
|
* Output help information if help flags specified
|
|
*
|
|
* @param {Command} cmd - command to output help for
|
|
* @param {Array} options - array of options to search for -h or --help
|
|
* @api private
|
|
*/
|
|
|
|
function outputHelpIfRequested(cmd, options) {
|
|
options = options || [];
|
|
|
|
for (var i = 0; i < options.length; i++) {
|
|
if (options[i] === cmd._helpLongFlag || options[i] === cmd._helpShortFlag) {
|
|
cmd.outputHelp();
|
|
// (Do not have all displayed text available so only passing placeholder.)
|
|
cmd._exit(0, 'commander.helpDisplayed', '(outputHelp)');
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Takes an argument and 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;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Scan arguments and increment port number for inspect calls (to avoid conflicts when spawning new command).
|
|
*
|
|
* @param {string[]} args - array of arguments from node.execArgv
|
|
* @returns {string[]}
|
|
* @api private
|
|
*/
|
|
|
|
function incrementNodeInspectorPort(args) {
|
|
// Testing for these options:
|
|
// --inspect[=[host:]port]
|
|
// --inspect-brk[=[host:]port]
|
|
// --inspect-port=[host:]port
|
|
return args.map((arg) => {
|
|
var result = arg;
|
|
if (arg.indexOf('--inspect') === 0) {
|
|
var debugOption;
|
|
var debugHost = '127.0.0.1';
|
|
var debugPort = '9229';
|
|
var match;
|
|
if ((match = arg.match(/^(--inspect(-brk)?)$/)) !== null) {
|
|
// e.g. --inspect
|
|
debugOption = match[1];
|
|
} else if ((match = arg.match(/^(--inspect(-brk|-port)?)=([^:]+)$/)) !== null) {
|
|
debugOption = match[1];
|
|
if (/^\d+$/.test(match[3])) {
|
|
// e.g. --inspect=1234
|
|
debugPort = match[3];
|
|
} else {
|
|
// e.g. --inspect=localhost
|
|
debugHost = match[3];
|
|
}
|
|
} else if ((match = arg.match(/^(--inspect(-brk|-port)?)=([^:]+):(\d+)$/)) !== null) {
|
|
// e.g. --inspect=localhost:1234
|
|
debugOption = match[1];
|
|
debugHost = match[3];
|
|
debugPort = match[4];
|
|
}
|
|
|
|
if (debugOption && debugPort !== '0') {
|
|
result = `${debugOption}=${debugHost}:${parseInt(debugPort) + 1}`;
|
|
}
|
|
}
|
|
return result;
|
|
});
|
|
}
|