1757 lines
50 KiB
JavaScript
1757 lines
50 KiB
JavaScript
/**
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* Module dependencies.
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*/
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const EventEmitter = require('events').EventEmitter;
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const spawn = require('child_process').spawn;
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const path = require('path');
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const fs = require('fs');
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// @ts-check
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class 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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constructor(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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const flagParts = flags.split(/[ ,|]+/);
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if (flagParts.length > 1 && !/^[[<]/.test(flagParts[1])) this.short = flagParts.shift();
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this.long = flagParts.shift();
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this.description = description || '';
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this.defaultValue = undefined;
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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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name() {
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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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attributeName() {
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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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is(arg) {
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return this.short === arg || this.long === arg;
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};
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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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this.nestedError = undefined;
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}
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}
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class Command extends EventEmitter {
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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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constructor(name) {
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super();
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this.commands = [];
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this.options = [];
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this.parent = null;
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this._allowUnknownOption = false;
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this._args = [];
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this.rawArgs = null;
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this._scriptPath = null;
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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._actionHandler = null;
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this._executableHandler = false;
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this._executableFile = null; // custom name for executable
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this._defaultCommandName = null;
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this._exitCallback = null;
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this._aliases = [];
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this._hidden = false;
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this._helpFlags = '-h, --help';
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this._helpDescription = 'display help for command';
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this._helpShortFlag = '-h';
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this._helpLongFlag = '--help';
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this._hasImplicitHelpCommand = undefined; // Deliberately undefined, not decided whether true or false
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this._helpCommandName = 'help';
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this._helpCommandnameAndArgs = 'help [command]';
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this._helpCommandDescription = 'display help for command';
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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 `this` for executable command
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* @api public
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*/
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command(nameAndArgs, actionOptsOrExecDesc, execOpts) {
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let desc = actionOptsOrExecDesc;
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let 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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const args = nameAndArgs.split(/ +/);
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const cmd = this.createCommand(args.shift());
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if (desc) {
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cmd.description(desc);
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cmd._executableHandler = true;
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}
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if (opts.isDefault) this._defaultCommandName = cmd._name;
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cmd._hidden = !!(opts.noHelp || opts.hidden);
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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._helpCommandName = this._helpCommandName;
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cmd._helpCommandnameAndArgs = this._helpCommandnameAndArgs;
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cmd._helpCommandDescription = this._helpCommandDescription;
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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 || null; // Custom name for executable file, set missing to null to match constructor
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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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* Factory routine to create a new unattached command.
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*
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* See .command() for creating an attached subcommand, which uses this routine to
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* create the command. You can override createCommand to customise subcommands.
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*
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* @param {string} [name]
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* @return {Command} new command
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* @api public
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*/
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createCommand(name) {
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return new Command(name);
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};
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/**
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* Add a prepared subcommand.
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*
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* See .command() for creating an attached subcommand which inherits settings from its parent.
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*
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* @param {Command} cmd - new subcommand
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* @param {Object} [opts] - configuration options
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* @return {Command} `this` command for chaining
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* @api public
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*/
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addCommand(cmd, opts) {
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if (!cmd._name) throw new Error('Command passed to .addCommand() must have a name');
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// To keep things simple, block automatic name generation for deeply nested executables.
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// Fail fast and detect when adding rather than later when parsing.
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function checkExplicitNames(commandArray) {
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commandArray.forEach((cmd) => {
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if (cmd._executableHandler && !cmd._executableFile) {
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throw new Error(`Must specify executableFile for deeply nested executable: ${cmd.name()}`);
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}
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checkExplicitNames(cmd.commands);
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});
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}
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checkExplicitNames(cmd.commands);
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opts = opts || {};
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if (opts.isDefault) this._defaultCommandName = cmd._name;
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if (opts.noHelp || opts.hidden) cmd._hidden = true; // modifying passed command due to existing implementation
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this.commands.push(cmd);
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cmd.parent = this;
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return this;
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};
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/**
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* Define argument syntax for the command.
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*
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* @api public
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*/
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arguments(desc) {
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return this._parseExpectedArgs(desc.split(/ +/));
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};
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/**
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* Override default decision whether to add implicit help command.
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*
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* addHelpCommand() // force on
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* addHelpCommand(false); // force off
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* addHelpCommand('help [cmd]', 'display help for [cmd]'); // force on with custom detais
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*
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* @return {Command} `this` command for chaining
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* @api public
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*/
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addHelpCommand(enableOrNameAndArgs, description) {
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if (enableOrNameAndArgs === false) {
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this._hasImplicitHelpCommand = false;
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} else {
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this._hasImplicitHelpCommand = true;
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if (typeof enableOrNameAndArgs === 'string') {
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this._helpCommandName = enableOrNameAndArgs.split(' ')[0];
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this._helpCommandnameAndArgs = enableOrNameAndArgs;
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}
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this._helpCommandDescription = description || this._helpCommandDescription;
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}
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return this;
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};
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/**
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* @return {boolean}
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* @api private
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*/
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_lazyHasImplicitHelpCommand() {
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if (this._hasImplicitHelpCommand === undefined) {
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this._hasImplicitHelpCommand = this.commands.length && !this._actionHandler && !this._findCommand('help');
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}
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return this._hasImplicitHelpCommand;
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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} `this` command for chaining
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* @api private
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*/
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_parseExpectedArgs(args) {
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if (!args.length) return;
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args.forEach((arg) => {
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const 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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this._args.push(argDetails);
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}
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});
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this._args.forEach((arg, i) => {
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if (arg.variadic && i < this._args.length - 1) {
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throw new Error(`only the last argument can be variadic '${arg.name}'`);
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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} `this` command for chaining
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* @api public
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*/
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exitOverride(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 = (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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_exit(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} `this` command for chaining
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* @api public
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*/
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action(fn) {
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const listener = (args) => {
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// The .action callback takes an extra parameter which is the command or options.
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const expectedArgsCount = this._args.length;
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const actionArgs = args.slice(0, expectedArgsCount);
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if (this._passCommandToAction) {
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actionArgs[expectedArgsCount] = this;
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} else {
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actionArgs[expectedArgsCount] = this.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(this, actionArgs);
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// Remember result in case it is async. Assume parseAsync getting called on root.
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let rootCommand = this;
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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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this._actionHandler = 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} `this` command for chaining
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* @api private
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*/
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_optionEx(config, flags, description, fn, defaultValue) {
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const option = new Option(flags, description);
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const oname = option.name();
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const 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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const regex = fn;
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fn = (val, def) => {
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const 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 = this._findOption(positiveLongFlag) ? this._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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this._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, (val) => {
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// coercion
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if (val !== null && fn) {
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val = fn(val, this._getOptionValue(name) === undefined ? defaultValue : this._getOptionValue(name));
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}
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// unassigned or boolean value
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if (typeof this._getOptionValue(name) === 'boolean' || typeof this._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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this._setOptionValue(name, option.negate
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? false
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: defaultValue || true);
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} else {
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this._setOptionValue(name, val);
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}
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} else if (val !== null) {
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// reassign
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this._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
|
|
* @param {Function|*} [fn] - custom option processing function or default vaue
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|
* @param {*} [defaultValue]
|
|
* @return {Command} `this` command for chaining
|
|
* @api public
|
|
*/
|
|
|
|
option(flags, description, fn, defaultValue) {
|
|
return this._optionEx({}, flags, description, fn, defaultValue);
|
|
};
|
|
|
|
/*
|
|
* Add a required option which must have a value after parsing. This usually means
|
|
* the option must be specified on the command line. (Otherwise the same as .option().)
|
|
*
|
|
* The `flags` string should contain both the short and long flags, separated by comma, a pipe or space.
|
|
*
|
|
* @param {string} flags
|
|
* @param {string} description
|
|
* @param {Function|*} [fn] - custom option processing function or default vaue
|
|
* @param {*} [defaultValue]
|
|
* @return {Command} `this` command for chaining
|
|
* @api public
|
|
*/
|
|
|
|
requiredOption(flags, description, fn, defaultValue) {
|
|
return this._optionEx({ mandatory: true }, flags, description, fn, defaultValue);
|
|
};
|
|
|
|
/**
|
|
* Allow unknown options on the command line.
|
|
*
|
|
* @param {Boolean} [arg] - if `true` or omitted, no error will be thrown
|
|
* for unknown options.
|
|
* @api public
|
|
*/
|
|
allowUnknownOption(arg) {
|
|
this._allowUnknownOption = (arg === undefined) || arg;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* 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} `this` command for chaining
|
|
* @api public
|
|
*/
|
|
|
|
storeOptionsAsProperties(value) {
|
|
this._storeOptionsAsProperties = (value === undefined) || value;
|
|
if (this.options.length) {
|
|
throw new 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} `this` command for chaining
|
|
* @api public
|
|
*/
|
|
|
|
passCommandToAction(value) {
|
|
this._passCommandToAction = (value === undefined) || value;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Store option value
|
|
*
|
|
* @param {string} key
|
|
* @param {Object} value
|
|
* @api private
|
|
*/
|
|
|
|
_setOptionValue(key, value) {
|
|
if (this._storeOptionsAsProperties) {
|
|
this[key] = value;
|
|
} else {
|
|
this._optionValues[key] = value;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Retrieve option value
|
|
*
|
|
* @param {string} key
|
|
* @return {Object} value
|
|
* @api private
|
|
*/
|
|
|
|
_getOptionValue(key) {
|
|
if (this._storeOptionsAsProperties) {
|
|
return this[key];
|
|
}
|
|
return this._optionValues[key];
|
|
};
|
|
|
|
/**
|
|
* Parse `argv`, setting options and invoking commands when defined.
|
|
*
|
|
* The default expectation is that the arguments are from node and have the application as argv[0]
|
|
* and the script being run in argv[1], with user parameters after that.
|
|
*
|
|
* Examples:
|
|
*
|
|
* program.parse(process.argv);
|
|
* program.parse(); // implicitly use process.argv and auto-detect node vs electron conventions
|
|
* program.parse(my-args, { from: 'user' }); // just user supplied arguments, nothing special about argv[0]
|
|
*
|
|
* @param {string[]} [argv] - optional, defaults to process.argv
|
|
* @param {Object} [parseOptions] - optionally specify style of options with from: node/user/electron
|
|
* @param {string} [parseOptions.from] - where the args are from: 'node', 'user', 'electron'
|
|
* @return {Command} `this` command for chaining
|
|
* @api public
|
|
*/
|
|
|
|
parse(argv, parseOptions) {
|
|
if (argv !== undefined && !Array.isArray(argv)) {
|
|
throw new Error('first parameter to parse must be array or undefined');
|
|
}
|
|
parseOptions = parseOptions || {};
|
|
|
|
// Default to using process.argv
|
|
if (argv === undefined) {
|
|
argv = process.argv;
|
|
// @ts-ignore
|
|
if (process.versions && process.versions.electron) {
|
|
parseOptions.from = 'electron';
|
|
}
|
|
}
|
|
this.rawArgs = argv.slice();
|
|
|
|
// make it a little easier for callers by supporting various argv conventions
|
|
let userArgs;
|
|
switch (parseOptions.from) {
|
|
case undefined:
|
|
case 'node':
|
|
this._scriptPath = argv[1];
|
|
userArgs = argv.slice(2);
|
|
break;
|
|
case 'electron':
|
|
// @ts-ignore
|
|
if (process.defaultApp) {
|
|
this._scriptPath = argv[1];
|
|
userArgs = argv.slice(2);
|
|
} else {
|
|
userArgs = argv.slice(1);
|
|
}
|
|
break;
|
|
case 'user':
|
|
userArgs = argv.slice(0);
|
|
break;
|
|
default:
|
|
throw new Error(`unexpected parse option { from: '${parseOptions.from}' }`);
|
|
}
|
|
if (!this._scriptPath && process.mainModule) {
|
|
this._scriptPath = process.mainModule.filename;
|
|
}
|
|
|
|
// Guess name, used in usage in help.
|
|
this._name = this._name || (this._scriptPath && path.basename(this._scriptPath, path.extname(this._scriptPath)));
|
|
|
|
// Let's go!
|
|
this._parseCommand([], userArgs);
|
|
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* The default expectation is that the arguments are from node and have the application as argv[0]
|
|
* and the script being run in argv[1], with user parameters after that.
|
|
*
|
|
* Examples:
|
|
*
|
|
* program.parseAsync(process.argv);
|
|
* program.parseAsync(); // implicitly use process.argv and auto-detect node vs electron conventions
|
|
* program.parseAsync(my-args, { from: 'user' }); // just user supplied arguments, nothing special about argv[0]
|
|
*
|
|
* @param {string[]} [argv]
|
|
* @param {Object} [parseOptions]
|
|
* @param {string} parseOptions.from - where the args are from: 'node', 'user', 'electron'
|
|
* @return {Promise}
|
|
* @api public
|
|
*/
|
|
|
|
parseAsync(argv, parseOptions) {
|
|
this.parse(argv, parseOptions);
|
|
return Promise.all(this._actionResults).then(() => this);
|
|
};
|
|
|
|
/**
|
|
* Execute a sub-command executable.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
_executeSubCommand(subcommand, args) {
|
|
args = args.slice();
|
|
let launchWithNode = false; // Use node for source targets so do not need to get permissions correct, and on Windows.
|
|
const sourceExt = ['.js', '.ts', '.mjs'];
|
|
|
|
// Not checking for help first. Unlikely to have mandatory and executable, and can't robustly test for help flags in external command.
|
|
this._checkForMissingMandatoryOptions();
|
|
|
|
// Want the entry script as the reference for command name and directory for searching for other files.
|
|
const scriptPath = this._scriptPath;
|
|
|
|
let baseDir;
|
|
try {
|
|
const resolvedLink = fs.realpathSync(scriptPath);
|
|
baseDir = path.dirname(resolvedLink);
|
|
} catch (e) {
|
|
baseDir = '.'; // dummy, probably not going to find executable!
|
|
}
|
|
|
|
// name of the subcommand, like `pm-install`
|
|
let bin = path.basename(scriptPath, path.extname(scriptPath)) + '-' + subcommand._name;
|
|
if (subcommand._executableFile) {
|
|
bin = subcommand._executableFile;
|
|
}
|
|
|
|
const localBin = path.join(baseDir, bin);
|
|
if (fs.existsSync(localBin)) {
|
|
// prefer local `./<bin>` to bin in the $PATH
|
|
bin = localBin;
|
|
} else {
|
|
// Look for source files.
|
|
sourceExt.forEach((ext) => {
|
|
if (fs.existsSync(`${localBin}${ext}`)) {
|
|
bin = `${localBin}${ext}`;
|
|
}
|
|
});
|
|
}
|
|
launchWithNode = sourceExt.includes(path.extname(bin));
|
|
|
|
let proc;
|
|
if (process.platform !== 'win32') {
|
|
if (launchWithNode) {
|
|
args.unshift(bin);
|
|
// add executable arguments to spawn
|
|
args = incrementNodeInspectorPort(process.execArgv).concat(args);
|
|
|
|
proc = spawn(process.argv[0], args, { stdio: 'inherit' });
|
|
} else {
|
|
proc = spawn(bin, args, { stdio: 'inherit' });
|
|
}
|
|
} else {
|
|
args.unshift(bin);
|
|
// add executable arguments to spawn
|
|
args = incrementNodeInspectorPort(process.execArgv).concat(args);
|
|
proc = spawn(process.execPath, args, { stdio: 'inherit' });
|
|
}
|
|
|
|
const signals = ['SIGUSR1', 'SIGUSR2', 'SIGTERM', 'SIGINT', 'SIGHUP'];
|
|
signals.forEach((signal) => {
|
|
// @ts-ignore
|
|
process.on(signal, () => {
|
|
if (proc.killed === false && proc.exitCode === null) {
|
|
proc.kill(signal);
|
|
}
|
|
});
|
|
});
|
|
|
|
// By default terminate process when spawned process terminates.
|
|
// Suppressing the exit if exitCallback defined is a bit messy and of limited use, but does allow process to stay running!
|
|
const exitCallback = this._exitCallback;
|
|
if (!exitCallback) {
|
|
proc.on('close', process.exit.bind(process));
|
|
} else {
|
|
proc.on('close', () => {
|
|
exitCallback(new CommanderError(process.exitCode || 0, 'commander.executeSubCommandAsync', '(close)'));
|
|
});
|
|
}
|
|
proc.on('error', (err) => {
|
|
// @ts-ignore
|
|
if (err.code === 'ENOENT') {
|
|
const executableMissing = `'${bin}' does not exist
|
|
- if '${subcommand._name}' is not meant to be an executable command, remove description parameter from '.command()' and use '.description()' instead
|
|
- if the default executable name is not suitable, use the executableFile option to supply a custom name`;
|
|
throw new Error(executableMissing);
|
|
// @ts-ignore
|
|
} else if (err.code === 'EACCES') {
|
|
throw new Error(`'${bin}' not executable`);
|
|
}
|
|
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;
|
|
};
|
|
|
|
/**
|
|
* @api private
|
|
*/
|
|
_dispatchSubcommand(commandName, operands, unknown) {
|
|
const subCommand = this._findCommand(commandName);
|
|
if (!subCommand) this._helpAndError();
|
|
|
|
if (subCommand._executableHandler) {
|
|
this._executeSubCommand(subCommand, operands.concat(unknown));
|
|
} else {
|
|
subCommand._parseCommand(operands, unknown);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Process arguments in context of this command.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
_parseCommand(operands, unknown) {
|
|
const parsed = this.parseOptions(unknown);
|
|
operands = operands.concat(parsed.operands);
|
|
unknown = parsed.unknown;
|
|
this.args = operands.concat(unknown);
|
|
|
|
if (operands && this._findCommand(operands[0])) {
|
|
this._dispatchSubcommand(operands[0], operands.slice(1), unknown);
|
|
} else if (this._lazyHasImplicitHelpCommand() && operands[0] === this._helpCommandName) {
|
|
if (operands.length === 1) {
|
|
this.help();
|
|
} else {
|
|
this._dispatchSubcommand(operands[1], [], [this._helpLongFlag]);
|
|
}
|
|
} else if (this._defaultCommandName) {
|
|
outputHelpIfRequested(this, unknown); // Run the help for default command from parent rather than passing to default command
|
|
this._dispatchSubcommand(this._defaultCommandName, operands, unknown);
|
|
} else {
|
|
if (this.commands.length && this.args.length === 0 && !this._actionHandler && !this._defaultCommandName) {
|
|
// probaby missing subcommand and no handler, user needs help
|
|
this._helpAndError();
|
|
}
|
|
|
|
outputHelpIfRequested(this, parsed.unknown);
|
|
this._checkForMissingMandatoryOptions();
|
|
if (parsed.unknown.length > 0) {
|
|
this.unknownOption(parsed.unknown[0]);
|
|
}
|
|
|
|
if (this._actionHandler) {
|
|
const args = this.args.slice();
|
|
this._args.forEach((arg, i) => {
|
|
if (arg.required && args[i] == null) {
|
|
this.missingArgument(arg.name);
|
|
} else if (arg.variadic) {
|
|
args[i] = args.splice(i);
|
|
}
|
|
});
|
|
|
|
this._actionHandler(args);
|
|
this.emit('command:' + this.name(), operands, unknown);
|
|
} else if (operands.length) {
|
|
if (this._findCommand('*')) {
|
|
this._dispatchSubcommand('*', operands, unknown);
|
|
} else if (this.listenerCount('command:*')) {
|
|
this.emit('command:*', operands, unknown);
|
|
} else if (this.commands.length) {
|
|
this.unknownCommand();
|
|
}
|
|
} else if (this.commands.length) {
|
|
// This command has subcommands and nothing hooked up at this level, so display help.
|
|
this._helpAndError();
|
|
} else {
|
|
// fall through for caller to handle after calling .parse()
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Find matching command.
|
|
*
|
|
* @api private
|
|
*/
|
|
_findCommand(name) {
|
|
if (!name) return undefined;
|
|
return this.commands.find(cmd => cmd._name === name || cmd._aliases.includes(name));
|
|
};
|
|
|
|
/**
|
|
* Return an option matching `arg` if any.
|
|
*
|
|
* @param {string} arg
|
|
* @return {Option}
|
|
* @api private
|
|
*/
|
|
|
|
_findOption(arg) {
|
|
return this.options.find(option => option.is(arg));
|
|
};
|
|
|
|
/**
|
|
* Display an error message if a mandatory option does not have a value.
|
|
* Lazy calling after checking for help flags from leaf subcommand.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
_checkForMissingMandatoryOptions() {
|
|
// Walk up hierarchy so can call in subcommand after checking for displaying help.
|
|
for (let 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` removing known options,
|
|
* and return argv split into operands and unknown arguments.
|
|
*
|
|
* Examples:
|
|
*
|
|
* argv => operands, unknown
|
|
* --known kkk op => [op], []
|
|
* op --known kkk => [op], []
|
|
* sub --unknown uuu op => [sub], [--unknown uuu op]
|
|
* sub -- --unknown uuu op => [sub --unknown uuu op], []
|
|
*
|
|
* @param {String[]} argv
|
|
* @return {{operands: String[], unknown: String[]}}
|
|
* @api public
|
|
*/
|
|
|
|
parseOptions(argv) {
|
|
const operands = []; // operands, not options or values
|
|
const unknown = []; // first unknown option and remaining unknown args
|
|
let dest = operands;
|
|
const args = argv.slice();
|
|
|
|
function maybeOption(arg) {
|
|
return arg.length > 1 && arg[0] === '-';
|
|
}
|
|
|
|
// parse options
|
|
while (args.length) {
|
|
const arg = args.shift();
|
|
|
|
// literal
|
|
if (arg === '--') {
|
|
if (dest === unknown) dest.push(arg);
|
|
dest.push(...args);
|
|
break;
|
|
}
|
|
|
|
if (maybeOption(arg)) {
|
|
const option = this._findOption(arg);
|
|
// recognised option, call listener to assign value with possible custom processing
|
|
if (option) {
|
|
if (option.required) {
|
|
const value = args.shift();
|
|
if (value === undefined) this.optionMissingArgument(option);
|
|
this.emit(`option:${option.name()}`, value);
|
|
} else if (option.optional) {
|
|
let value = null;
|
|
// historical behaviour is optional value is following arg unless an option
|
|
if (args.length > 0 && !maybeOption(args[0])) {
|
|
value = args.shift();
|
|
}
|
|
this.emit(`option:${option.name()}`, value);
|
|
} else { // boolean flag
|
|
this.emit(`option:${option.name()}`);
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Look for combo options following single dash, eat first one if known.
|
|
if (arg.length > 2 && arg[0] === '-' && arg[1] !== '-') {
|
|
const option = this._findOption(`-${arg[1]}`);
|
|
if (option) {
|
|
if (option.required || option.optional) {
|
|
// option with value following in same argument
|
|
this.emit(`option:${option.name()}`, arg.slice(2));
|
|
} else {
|
|
// boolean option, emit and put back remainder of arg for further processing
|
|
this.emit(`option:${option.name()}`);
|
|
args.unshift(`-${arg.slice(2)}`);
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Look for known long flag with value, like --foo=bar
|
|
if (/^--[^=]+=/.test(arg)) {
|
|
const index = arg.indexOf('=');
|
|
const option = this._findOption(arg.slice(0, index));
|
|
if (option && (option.required || option.optional)) {
|
|
this.emit(`option:${option.name()}`, arg.slice(index + 1));
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// looks like an option but unknown, unknowns from here
|
|
if (arg.length > 1 && arg[0] === '-') {
|
|
dest = unknown;
|
|
}
|
|
|
|
// add arg
|
|
dest.push(arg);
|
|
}
|
|
|
|
return { operands, unknown };
|
|
};
|
|
|
|
/**
|
|
* Return an object containing options as key-value pairs
|
|
*
|
|
* @return {Object}
|
|
* @api public
|
|
*/
|
|
opts() {
|
|
if (this._storeOptionsAsProperties) {
|
|
// Preserve original behaviour so backwards compatible when still using properties
|
|
const result = {};
|
|
const len = this.options.length;
|
|
|
|
for (let i = 0; i < len; i++) {
|
|
const 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
|
|
*/
|
|
|
|
missingArgument(name) {
|
|
const message = `error: missing required argument '${name}'`;
|
|
console.error(message);
|
|
this._exit(1, 'commander.missingArgument', message);
|
|
};
|
|
|
|
/**
|
|
* `Option` is missing an argument, but received `flag` or nothing.
|
|
*
|
|
* @param {Option} option
|
|
* @param {string} [flag]
|
|
* @api private
|
|
*/
|
|
|
|
optionMissingArgument(option, flag) {
|
|
let message;
|
|
if (flag) {
|
|
message = `error: option '${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
|
|
*/
|
|
|
|
missingMandatoryOptionValue(option) {
|
|
const message = `error: required option '${option.flags}' not specified`;
|
|
console.error(message);
|
|
this._exit(1, 'commander.missingMandatoryOptionValue', message);
|
|
};
|
|
|
|
/**
|
|
* Unknown option `flag`.
|
|
*
|
|
* @param {string} flag
|
|
* @api private
|
|
*/
|
|
|
|
unknownOption(flag) {
|
|
if (this._allowUnknownOption) return;
|
|
const message = `error: unknown option '${flag}'`;
|
|
console.error(message);
|
|
this._exit(1, 'commander.unknownOption', message);
|
|
};
|
|
|
|
/**
|
|
* Unknown command.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
unknownCommand() {
|
|
const partCommands = [this.name()];
|
|
for (let parentCmd = this.parent; parentCmd; parentCmd = parentCmd.parent) {
|
|
partCommands.unshift(parentCmd.name());
|
|
}
|
|
const fullCommand = partCommands.join(' ');
|
|
const message = `error: unknown command '${this.args[0]}'. See '${fullCommand} ${this._helpLongFlag}'.`;
|
|
console.error(message);
|
|
this._exit(1, 'commander.unknownCommand', 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 {this | string} `this` command for chaining, or version string if no arguments
|
|
* @api public
|
|
*/
|
|
|
|
version(str, flags, description) {
|
|
if (str === undefined) return this._version;
|
|
this._version = str;
|
|
flags = flags || '-V, --version';
|
|
description = description || 'output the version number';
|
|
const versionOption = new Option(flags, description);
|
|
this._versionOptionName = versionOption.long.substr(2) || 'version';
|
|
this.options.push(versionOption);
|
|
this.on('option:' + this._versionOptionName, () => {
|
|
process.stdout.write(str + '\n');
|
|
this._exit(0, 'commander.version', str);
|
|
});
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Set the description to `str`.
|
|
*
|
|
* @param {string} str
|
|
* @param {Object} [argsDescription]
|
|
* @return {string|Command}
|
|
* @api public
|
|
*/
|
|
|
|
description(str, argsDescription) {
|
|
if (str === undefined && argsDescription === undefined) return this._description;
|
|
this._description = str;
|
|
this._argsDescription = argsDescription;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Set an alias for the command.
|
|
*
|
|
* You may call more than once to add multiple aliases. Only the first alias is shown in the auto-generated help.
|
|
*
|
|
* @param {string} [alias]
|
|
* @return {string|Command}
|
|
* @api public
|
|
*/
|
|
|
|
alias(alias) {
|
|
if (alias === undefined) return this._aliases[0]; // just return first, for backwards compatibility
|
|
|
|
let command = this;
|
|
if (this.commands.length !== 0 && this.commands[this.commands.length - 1]._executableHandler) {
|
|
// assume adding alias for last added executable subcommand, rather than this
|
|
command = this.commands[this.commands.length - 1];
|
|
}
|
|
|
|
if (alias === command._name) throw new Error('Command alias can\'t be the same as its name');
|
|
|
|
command._aliases.push(alias);
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Set aliases for the command.
|
|
*
|
|
* Only the first alias is shown in the auto-generated help.
|
|
*
|
|
* @param {string[]} [aliases]
|
|
* @return {string[]|Command}
|
|
* @api public
|
|
*/
|
|
|
|
aliases(aliases) {
|
|
// Getter for the array of aliases is the main reason for having aliases() in addition to alias().
|
|
if (aliases === undefined) return this._aliases;
|
|
|
|
aliases.forEach((alias) => this.alias(alias));
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Set / get the command usage `str`.
|
|
*
|
|
* @param {string} [str]
|
|
* @return {String|Command}
|
|
* @api public
|
|
*/
|
|
|
|
usage(str) {
|
|
if (str === undefined) {
|
|
if (this._usage) return this._usage;
|
|
|
|
const args = this._args.map((arg) => {
|
|
return humanReadableArgName(arg);
|
|
});
|
|
return '[options]' +
|
|
(this.commands.length ? ' [command]' : '') +
|
|
(this._args.length ? ' ' + args.join(' ') : '');
|
|
}
|
|
|
|
this._usage = str;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Get or set the name of the command
|
|
*
|
|
* @param {string} [str]
|
|
* @return {String|Command}
|
|
* @api public
|
|
*/
|
|
|
|
name(str) {
|
|
if (str === undefined) return this._name;
|
|
this._name = str;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Return prepared commands.
|
|
*
|
|
* @return {Array}
|
|
* @api private
|
|
*/
|
|
|
|
prepareCommands() {
|
|
const commandDetails = this.commands.filter((cmd) => {
|
|
return !cmd._hidden;
|
|
}).map((cmd) => {
|
|
const args = cmd._args.map((arg) => {
|
|
return humanReadableArgName(arg);
|
|
}).join(' ');
|
|
|
|
return [
|
|
cmd._name +
|
|
(cmd._aliases[0] ? '|' + cmd._aliases[0] : '') +
|
|
(cmd.options.length ? ' [options]' : '') +
|
|
(args ? ' ' + args : ''),
|
|
cmd._description
|
|
];
|
|
});
|
|
|
|
if (this._lazyHasImplicitHelpCommand()) {
|
|
commandDetails.push([this._helpCommandnameAndArgs, this._helpCommandDescription]);
|
|
}
|
|
return commandDetails;
|
|
};
|
|
|
|
/**
|
|
* Return the largest command length.
|
|
*
|
|
* @return {number}
|
|
* @api private
|
|
*/
|
|
|
|
largestCommandLength() {
|
|
const commands = this.prepareCommands();
|
|
return commands.reduce((max, command) => {
|
|
return Math.max(max, command[0].length);
|
|
}, 0);
|
|
};
|
|
|
|
/**
|
|
* Return the largest option length.
|
|
*
|
|
* @return {number}
|
|
* @api private
|
|
*/
|
|
|
|
largestOptionLength() {
|
|
const options = [].slice.call(this.options);
|
|
options.push({
|
|
flags: this._helpFlags
|
|
});
|
|
|
|
return options.reduce((max, option) => {
|
|
return Math.max(max, option.flags.length);
|
|
}, 0);
|
|
};
|
|
|
|
/**
|
|
* Return the largest arg length.
|
|
*
|
|
* @return {number}
|
|
* @api private
|
|
*/
|
|
|
|
largestArgLength() {
|
|
return this._args.reduce((max, arg) => {
|
|
return Math.max(max, arg.name.length);
|
|
}, 0);
|
|
};
|
|
|
|
/**
|
|
* Return the pad width.
|
|
*
|
|
* @return {number}
|
|
* @api private
|
|
*/
|
|
|
|
padWidth() {
|
|
let 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
|
|
*/
|
|
|
|
optionHelp() {
|
|
const width = this.padWidth();
|
|
const columns = process.stdout.columns || 80;
|
|
const descriptionWidth = columns - width - 4;
|
|
function padOptionDetails(flags, description) {
|
|
return pad(flags, width) + ' ' + optionalWrap(description, descriptionWidth, width + 2);
|
|
};
|
|
|
|
// Explicit options (including version)
|
|
const help = this.options.map((option) => {
|
|
const fullDesc = option.description +
|
|
((!option.negate && option.defaultValue !== undefined) ? ' (default: ' + JSON.stringify(option.defaultValue) + ')' : '');
|
|
return padOptionDetails(option.flags, fullDesc);
|
|
});
|
|
|
|
// Implicit help
|
|
const showShortHelpFlag = this._helpShortFlag && !this._findOption(this._helpShortFlag);
|
|
const showLongHelpFlag = !this._findOption(this._helpLongFlag);
|
|
if (showShortHelpFlag || showLongHelpFlag) {
|
|
let helpFlags = this._helpFlags;
|
|
if (!showShortHelpFlag) {
|
|
helpFlags = this._helpLongFlag;
|
|
} else if (!showLongHelpFlag) {
|
|
helpFlags = this._helpShortFlag;
|
|
}
|
|
help.push(padOptionDetails(helpFlags, this._helpDescription));
|
|
}
|
|
|
|
return help.join('\n');
|
|
};
|
|
|
|
/**
|
|
* Return command help documentation.
|
|
*
|
|
* @return {string}
|
|
* @api private
|
|
*/
|
|
|
|
commandHelp() {
|
|
if (!this.commands.length && !this._lazyHasImplicitHelpCommand()) return '';
|
|
|
|
const commands = this.prepareCommands();
|
|
const width = this.padWidth();
|
|
|
|
const columns = process.stdout.columns || 80;
|
|
const descriptionWidth = columns - width - 4;
|
|
|
|
return [
|
|
'Commands:',
|
|
commands.map((cmd) => {
|
|
const 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 public
|
|
*/
|
|
|
|
helpInformation() {
|
|
let desc = [];
|
|
if (this._description) {
|
|
desc = [
|
|
this._description,
|
|
''
|
|
];
|
|
|
|
const argsDescription = this._argsDescription;
|
|
if (argsDescription && this._args.length) {
|
|
const width = this.padWidth();
|
|
const columns = process.stdout.columns || 80;
|
|
const descriptionWidth = columns - width - 5;
|
|
desc.push('Arguments:');
|
|
desc.push('');
|
|
this._args.forEach((arg) => {
|
|
desc.push(' ' + pad(arg.name, width) + ' ' + wrap(argsDescription[arg.name], descriptionWidth, width + 4));
|
|
});
|
|
desc.push('');
|
|
}
|
|
}
|
|
|
|
let cmdName = this._name;
|
|
if (this._aliases[0]) {
|
|
cmdName = cmdName + '|' + this._aliases[0];
|
|
}
|
|
let parentCmdNames = '';
|
|
for (let parentCmd = this.parent; parentCmd; parentCmd = parentCmd.parent) {
|
|
parentCmdNames = parentCmd.name() + ' ' + parentCmdNames;
|
|
}
|
|
const usage = [
|
|
'Usage: ' + parentCmdNames + cmdName + ' ' + this.usage(),
|
|
''
|
|
];
|
|
|
|
let cmds = [];
|
|
const commandHelp = this.commandHelp();
|
|
if (commandHelp) cmds = [commandHelp];
|
|
|
|
const 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
|
|
*/
|
|
|
|
outputHelp(cb) {
|
|
if (!cb) {
|
|
cb = (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} `this` command for chaining
|
|
* @api public
|
|
*/
|
|
|
|
helpOption(flags, description) {
|
|
this._helpFlags = flags || this._helpFlags;
|
|
this._helpDescription = description || this._helpDescription;
|
|
|
|
const splitFlags = this._helpFlags.split(/[ ,|]+/);
|
|
|
|
this._helpShortFlag = undefined;
|
|
if (splitFlags.length > 1) this._helpShortFlag = splitFlags.shift();
|
|
|
|
this._helpLongFlag = splitFlags.shift();
|
|
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Output help information and exit.
|
|
*
|
|
* @param {Function} [cb]
|
|
* @api public
|
|
*/
|
|
|
|
help(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)');
|
|
};
|
|
|
|
/**
|
|
* Output help information and exit. Display for error situations.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
_helpAndError() {
|
|
this.outputHelp();
|
|
// message: do not have all displayed text available so only passing placeholder.
|
|
this._exit(1, 'commander.help', '(outputHelp)');
|
|
};
|
|
};
|
|
|
|
/**
|
|
* Expose the root command.
|
|
*/
|
|
|
|
exports = module.exports = new Command();
|
|
exports.program = exports; // More explicit access to global command.
|
|
|
|
/**
|
|
* Expose classes
|
|
*/
|
|
|
|
exports.Command = Command;
|
|
exports.Option = Option;
|
|
exports.CommanderError = CommanderError;
|
|
|
|
/**
|
|
* Camel-case the given `flag`
|
|
*
|
|
* @param {string} flag
|
|
* @return {string}
|
|
* @api private
|
|
*/
|
|
|
|
function camelcase(flag) {
|
|
return flag.split('-').reduce((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) {
|
|
const 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) {
|
|
const regex = new RegExp('.{1,' + (width - 1) + '}([\\s\u200B]|$)|[^\\s\u200B]+?([\\s\u200B]|$)', 'g');
|
|
const lines = str.match(regex) || [];
|
|
return lines.map((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} args - array of options to search for help flags
|
|
* @api private
|
|
*/
|
|
|
|
function outputHelpIfRequested(cmd, args) {
|
|
const helpOption = args.find(arg => arg === cmd._helpLongFlag || arg === cmd._helpShortFlag);
|
|
if (helpOption) {
|
|
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) {
|
|
const nameOutput = arg.name + (arg.variadic === true ? '...' : '');
|
|
|
|
return arg.required
|
|
? '<' + nameOutput + '>'
|
|
: '[' + nameOutput + ']';
|
|
}
|
|
|
|
/**
|
|
* 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) => {
|
|
let result = arg;
|
|
if (arg.indexOf('--inspect') === 0) {
|
|
let debugOption;
|
|
let debugHost = '127.0.0.1';
|
|
let debugPort = '9229';
|
|
let 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;
|
|
});
|
|
}
|