2509 lines
76 KiB
JavaScript
2509 lines
76 KiB
JavaScript
const EventEmitter = require('node:events').EventEmitter;
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const childProcess = require('node:child_process');
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const path = require('node:path');
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const fs = require('node:fs');
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const process = require('node:process');
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const { Argument, humanReadableArgName } = require('./argument.js');
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const { CommanderError } = require('./error.js');
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const { Help } = require('./help.js');
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const { Option, DualOptions } = require('./option.js');
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const { suggestSimilar } = require('./suggestSimilar');
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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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*/
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constructor(name) {
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super();
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/** @type {Command[]} */
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this.commands = [];
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/** @type {Option[]} */
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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._allowExcessArguments = true;
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/** @type {Argument[]} */
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this.registeredArguments = [];
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this._args = this.registeredArguments; // deprecated old name
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/** @type {string[]} */
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this.args = []; // cli args with options removed
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this.rawArgs = [];
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this.processedArgs = []; // like .args but after custom processing and collecting variadic
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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._optionValueSources = {}; // default, env, cli etc
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this._storeOptionsAsProperties = false;
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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._executableDir = null; // custom search directory for subcommands
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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._combineFlagAndOptionalValue = true;
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this._description = '';
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this._summary = '';
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this._argsDescription = undefined; // legacy
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this._enablePositionalOptions = false;
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this._passThroughOptions = false;
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this._lifeCycleHooks = {}; // a hash of arrays
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/** @type {(boolean | string)} */
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this._showHelpAfterError = false;
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this._showSuggestionAfterError = true;
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// see .configureOutput() for docs
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this._outputConfiguration = {
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writeOut: (str) => process.stdout.write(str),
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writeErr: (str) => process.stderr.write(str),
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getOutHelpWidth: () =>
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process.stdout.isTTY ? process.stdout.columns : undefined,
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getErrHelpWidth: () =>
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process.stderr.isTTY ? process.stderr.columns : undefined,
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outputError: (str, write) => write(str),
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};
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this._hidden = false;
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/** @type {(Option | null | undefined)} */
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this._helpOption = undefined; // Lazy created on demand. May be null if help option is disabled.
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this._addImplicitHelpCommand = undefined; // undecided whether true or false yet, not inherited
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/** @type {Command} */
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this._helpCommand = undefined; // lazy initialised, inherited
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this._helpConfiguration = {};
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}
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/**
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* Copy settings that are useful to have in common across root command and subcommands.
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*
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* (Used internally when adding a command using `.command()` so subcommands inherit parent settings.)
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*
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* @param {Command} sourceCommand
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* @return {Command} `this` command for chaining
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*/
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copyInheritedSettings(sourceCommand) {
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this._outputConfiguration = sourceCommand._outputConfiguration;
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this._helpOption = sourceCommand._helpOption;
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this._helpCommand = sourceCommand._helpCommand;
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this._helpConfiguration = sourceCommand._helpConfiguration;
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this._exitCallback = sourceCommand._exitCallback;
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this._storeOptionsAsProperties = sourceCommand._storeOptionsAsProperties;
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this._combineFlagAndOptionalValue =
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sourceCommand._combineFlagAndOptionalValue;
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this._allowExcessArguments = sourceCommand._allowExcessArguments;
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this._enablePositionalOptions = sourceCommand._enablePositionalOptions;
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this._showHelpAfterError = sourceCommand._showHelpAfterError;
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this._showSuggestionAfterError = sourceCommand._showSuggestionAfterError;
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return this;
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}
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/**
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* @returns {Command[]}
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* @private
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*/
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_getCommandAndAncestors() {
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const result = [];
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// eslint-disable-next-line @typescript-eslint/no-this-alias
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for (let command = this; command; command = command.parent) {
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result.push(command);
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}
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return result;
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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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* @example
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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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*/
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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 [, name, args] = nameAndArgs.match(/([^ ]+) *(.*)/);
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const cmd = this.createCommand(name);
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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); // noHelp is deprecated old name for hidden
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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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if (args) cmd.arguments(args);
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this._registerCommand(cmd);
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cmd.parent = this;
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cmd.copyInheritedSettings(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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*/
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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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* You can customise the help with a subclass of Help by overriding createHelp,
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* or by overriding Help properties using configureHelp().
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*
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* @return {Help}
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*/
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createHelp() {
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return Object.assign(new Help(), this.configureHelp());
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}
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/**
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* You can customise the help by overriding Help properties using configureHelp(),
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* or with a subclass of Help by overriding createHelp().
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*
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* @param {object} [configuration] - configuration options
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* @return {(Command | object)} `this` command for chaining, or stored configuration
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*/
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configureHelp(configuration) {
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if (configuration === undefined) return this._helpConfiguration;
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this._helpConfiguration = configuration;
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return this;
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}
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/**
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* The default output goes to stdout and stderr. You can customise this for special
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* applications. You can also customise the display of errors by overriding outputError.
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*
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* The configuration properties are all functions:
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*
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* // functions to change where being written, stdout and stderr
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* writeOut(str)
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* writeErr(str)
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* // matching functions to specify width for wrapping help
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* getOutHelpWidth()
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* getErrHelpWidth()
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* // functions based on what is being written out
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* outputError(str, write) // used for displaying errors, and not used for displaying help
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*
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* @param {object} [configuration] - configuration options
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* @return {(Command | object)} `this` command for chaining, or stored configuration
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*/
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configureOutput(configuration) {
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if (configuration === undefined) return this._outputConfiguration;
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Object.assign(this._outputConfiguration, configuration);
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return this;
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}
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/**
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* Display the help or a custom message after an error occurs.
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*
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* @param {(boolean|string)} [displayHelp]
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* @return {Command} `this` command for chaining
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*/
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showHelpAfterError(displayHelp = true) {
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if (typeof displayHelp !== 'string') displayHelp = !!displayHelp;
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this._showHelpAfterError = displayHelp;
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return this;
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}
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/**
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* Display suggestion of similar commands for unknown commands, or options for unknown options.
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*
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* @param {boolean} [displaySuggestion]
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* @return {Command} `this` command for chaining
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*/
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showSuggestionAfterError(displaySuggestion = true) {
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this._showSuggestionAfterError = !!displaySuggestion;
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return this;
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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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*/
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addCommand(cmd, opts) {
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if (!cmd._name) {
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throw new Error(`Command passed to .addCommand() must have a name
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- specify the name in Command constructor or using .name()`);
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}
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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._registerCommand(cmd);
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cmd.parent = this;
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cmd._checkForBrokenPassThrough();
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return this;
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}
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/**
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* Factory routine to create a new unattached argument.
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*
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* See .argument() for creating an attached argument, which uses this routine to
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* create the argument. You can override createArgument to return a custom argument.
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*
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* @param {string} name
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* @param {string} [description]
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* @return {Argument} new argument
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*/
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createArgument(name, description) {
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return new Argument(name, description);
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}
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/**
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* Define argument syntax for command.
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*
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* The default is that the argument is required, and you can explicitly
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* indicate this with <> around the name. Put [] around the name for an optional argument.
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*
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* @example
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* program.argument('<input-file>');
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* program.argument('[output-file]');
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*
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* @param {string} name
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* @param {string} [description]
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* @param {(Function|*)} [fn] - custom argument processing function
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* @param {*} [defaultValue]
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* @return {Command} `this` command for chaining
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*/
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argument(name, description, fn, defaultValue) {
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const argument = this.createArgument(name, description);
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if (typeof fn === 'function') {
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argument.default(defaultValue).argParser(fn);
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} else {
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argument.default(fn);
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}
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this.addArgument(argument);
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return this;
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}
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/**
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* Define argument syntax for command, adding multiple at once (without descriptions).
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*
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* See also .argument().
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*
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* @example
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* program.arguments('<cmd> [env]');
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*
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* @param {string} names
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* @return {Command} `this` command for chaining
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*/
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arguments(names) {
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names
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.trim()
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.split(/ +/)
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.forEach((detail) => {
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this.argument(detail);
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});
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return this;
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}
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/**
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* Define argument syntax for command, adding a prepared argument.
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*
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* @param {Argument} argument
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* @return {Command} `this` command for chaining
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*/
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addArgument(argument) {
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const previousArgument = this.registeredArguments.slice(-1)[0];
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if (previousArgument && previousArgument.variadic) {
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throw new Error(
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`only the last argument can be variadic '${previousArgument.name()}'`,
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);
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}
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if (
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argument.required &&
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argument.defaultValue !== undefined &&
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argument.parseArg === undefined
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) {
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throw new Error(
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`a default value for a required argument is never used: '${argument.name()}'`,
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);
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}
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this.registeredArguments.push(argument);
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return this;
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}
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/**
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* Customise or override default help command. By default a help command is automatically added if your command has subcommands.
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*
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* @example
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* program.helpCommand('help [cmd]');
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* program.helpCommand('help [cmd]', 'show help');
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* program.helpCommand(false); // suppress default help command
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* program.helpCommand(true); // add help command even if no subcommands
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*
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* @param {string|boolean} enableOrNameAndArgs - enable with custom name and/or arguments, or boolean to override whether added
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* @param {string} [description] - custom description
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* @return {Command} `this` command for chaining
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*/
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helpCommand(enableOrNameAndArgs, description) {
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if (typeof enableOrNameAndArgs === 'boolean') {
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this._addImplicitHelpCommand = enableOrNameAndArgs;
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return this;
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}
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enableOrNameAndArgs = enableOrNameAndArgs ?? 'help [command]';
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const [, helpName, helpArgs] = enableOrNameAndArgs.match(/([^ ]+) *(.*)/);
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const helpDescription = description ?? 'display help for command';
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const helpCommand = this.createCommand(helpName);
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helpCommand.helpOption(false);
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if (helpArgs) helpCommand.arguments(helpArgs);
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if (helpDescription) helpCommand.description(helpDescription);
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this._addImplicitHelpCommand = true;
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this._helpCommand = helpCommand;
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return this;
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}
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/**
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* Add prepared custom help command.
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*
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* @param {(Command|string|boolean)} helpCommand - custom help command, or deprecated enableOrNameAndArgs as for `.helpCommand()`
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* @param {string} [deprecatedDescription] - deprecated custom description used with custom name only
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* @return {Command} `this` command for chaining
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*/
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addHelpCommand(helpCommand, deprecatedDescription) {
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// If not passed an object, call through to helpCommand for backwards compatibility,
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// as addHelpCommand was originally used like helpCommand is now.
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if (typeof helpCommand !== 'object') {
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this.helpCommand(helpCommand, deprecatedDescription);
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return this;
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}
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this._addImplicitHelpCommand = true;
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this._helpCommand = helpCommand;
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return this;
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}
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/**
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* Lazy create help command.
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*
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* @return {(Command|null)}
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* @package
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*/
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_getHelpCommand() {
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const hasImplicitHelpCommand =
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this._addImplicitHelpCommand ??
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(this.commands.length &&
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!this._actionHandler &&
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!this._findCommand('help'));
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if (hasImplicitHelpCommand) {
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if (this._helpCommand === undefined) {
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this.helpCommand(undefined, undefined); // use default name and description
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}
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return this._helpCommand;
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}
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return null;
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}
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/**
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* Add hook for life cycle event.
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*
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* @param {string} event
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* @param {Function} listener
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* @return {Command} `this` command for chaining
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*/
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hook(event, listener) {
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const allowedValues = ['preSubcommand', 'preAction', 'postAction'];
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if (!allowedValues.includes(event)) {
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throw new Error(`Unexpected value for event passed to hook : '${event}'.
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Expecting one of '${allowedValues.join("', '")}'`);
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}
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if (this._lifeCycleHooks[event]) {
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this._lifeCycleHooks[event].push(listener);
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} else {
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this._lifeCycleHooks[event] = [listener];
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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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*/
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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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* @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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* @example
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* program
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* .command('serve')
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* .description('start service')
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* .action(function() {
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* // do work 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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*/
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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.registeredArguments.length;
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const actionArgs = args.slice(0, expectedArgsCount);
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if (this._storeOptionsAsProperties) {
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actionArgs[expectedArgsCount] = this; // backwards compatible "options"
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} else {
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actionArgs[expectedArgsCount] = this.opts();
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}
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actionArgs.push(this);
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return fn.apply(this, actionArgs);
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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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/**
|
|
* Factory routine to create a new unattached option.
|
|
*
|
|
* See .option() for creating an attached option, which uses this routine to
|
|
* create the option. You can override createOption to return a custom option.
|
|
*
|
|
* @param {string} flags
|
|
* @param {string} [description]
|
|
* @return {Option} new option
|
|
*/
|
|
|
|
createOption(flags, description) {
|
|
return new Option(flags, description);
|
|
}
|
|
|
|
/**
|
|
* Wrap parseArgs to catch 'commander.invalidArgument'.
|
|
*
|
|
* @param {(Option | Argument)} target
|
|
* @param {string} value
|
|
* @param {*} previous
|
|
* @param {string} invalidArgumentMessage
|
|
* @private
|
|
*/
|
|
|
|
_callParseArg(target, value, previous, invalidArgumentMessage) {
|
|
try {
|
|
return target.parseArg(value, previous);
|
|
} catch (err) {
|
|
if (err.code === 'commander.invalidArgument') {
|
|
const message = `${invalidArgumentMessage} ${err.message}`;
|
|
this.error(message, { exitCode: err.exitCode, code: err.code });
|
|
}
|
|
throw err;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check for option flag conflicts.
|
|
* Register option if no conflicts found, or throw on conflict.
|
|
*
|
|
* @param {Option} option
|
|
* @private
|
|
*/
|
|
|
|
_registerOption(option) {
|
|
const matchingOption =
|
|
(option.short && this._findOption(option.short)) ||
|
|
(option.long && this._findOption(option.long));
|
|
if (matchingOption) {
|
|
const matchingFlag =
|
|
option.long && this._findOption(option.long)
|
|
? option.long
|
|
: option.short;
|
|
throw new Error(`Cannot add option '${option.flags}'${this._name && ` to command '${this._name}'`} due to conflicting flag '${matchingFlag}'
|
|
- already used by option '${matchingOption.flags}'`);
|
|
}
|
|
|
|
this.options.push(option);
|
|
}
|
|
|
|
/**
|
|
* Check for command name and alias conflicts with existing commands.
|
|
* Register command if no conflicts found, or throw on conflict.
|
|
*
|
|
* @param {Command} command
|
|
* @private
|
|
*/
|
|
|
|
_registerCommand(command) {
|
|
const knownBy = (cmd) => {
|
|
return [cmd.name()].concat(cmd.aliases());
|
|
};
|
|
|
|
const alreadyUsed = knownBy(command).find((name) =>
|
|
this._findCommand(name),
|
|
);
|
|
if (alreadyUsed) {
|
|
const existingCmd = knownBy(this._findCommand(alreadyUsed)).join('|');
|
|
const newCmd = knownBy(command).join('|');
|
|
throw new Error(
|
|
`cannot add command '${newCmd}' as already have command '${existingCmd}'`,
|
|
);
|
|
}
|
|
|
|
this.commands.push(command);
|
|
}
|
|
|
|
/**
|
|
* Add an option.
|
|
*
|
|
* @param {Option} option
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
addOption(option) {
|
|
this._registerOption(option);
|
|
|
|
const oname = option.name();
|
|
const name = option.attributeName();
|
|
|
|
// store default value
|
|
if (option.negate) {
|
|
// --no-foo is special and defaults foo to true, unless a --foo option is already defined
|
|
const positiveLongFlag = option.long.replace(/^--no-/, '--');
|
|
if (!this._findOption(positiveLongFlag)) {
|
|
this.setOptionValueWithSource(
|
|
name,
|
|
option.defaultValue === undefined ? true : option.defaultValue,
|
|
'default',
|
|
);
|
|
}
|
|
} else if (option.defaultValue !== undefined) {
|
|
this.setOptionValueWithSource(name, option.defaultValue, 'default');
|
|
}
|
|
|
|
// handler for cli and env supplied values
|
|
const handleOptionValue = (val, invalidValueMessage, valueSource) => {
|
|
// val is null for optional option used without an optional-argument.
|
|
// val is undefined for boolean and negated option.
|
|
if (val == null && option.presetArg !== undefined) {
|
|
val = option.presetArg;
|
|
}
|
|
|
|
// custom processing
|
|
const oldValue = this.getOptionValue(name);
|
|
if (val !== null && option.parseArg) {
|
|
val = this._callParseArg(option, val, oldValue, invalidValueMessage);
|
|
} else if (val !== null && option.variadic) {
|
|
val = option._concatValue(val, oldValue);
|
|
}
|
|
|
|
// Fill-in appropriate missing values. Long winded but easy to follow.
|
|
if (val == null) {
|
|
if (option.negate) {
|
|
val = false;
|
|
} else if (option.isBoolean() || option.optional) {
|
|
val = true;
|
|
} else {
|
|
val = ''; // not normal, parseArg might have failed or be a mock function for testing
|
|
}
|
|
}
|
|
this.setOptionValueWithSource(name, val, valueSource);
|
|
};
|
|
|
|
this.on('option:' + oname, (val) => {
|
|
const invalidValueMessage = `error: option '${option.flags}' argument '${val}' is invalid.`;
|
|
handleOptionValue(val, invalidValueMessage, 'cli');
|
|
});
|
|
|
|
if (option.envVar) {
|
|
this.on('optionEnv:' + oname, (val) => {
|
|
const invalidValueMessage = `error: option '${option.flags}' value '${val}' from env '${option.envVar}' is invalid.`;
|
|
handleOptionValue(val, invalidValueMessage, 'env');
|
|
});
|
|
}
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Internal implementation shared by .option() and .requiredOption()
|
|
*
|
|
* @return {Command} `this` command for chaining
|
|
* @private
|
|
*/
|
|
_optionEx(config, flags, description, fn, defaultValue) {
|
|
if (typeof flags === 'object' && flags instanceof Option) {
|
|
throw new Error(
|
|
'To add an Option object use addOption() instead of option() or requiredOption()',
|
|
);
|
|
}
|
|
const option = this.createOption(flags, description);
|
|
option.makeOptionMandatory(!!config.mandatory);
|
|
if (typeof fn === 'function') {
|
|
option.default(defaultValue).argParser(fn);
|
|
} else if (fn instanceof RegExp) {
|
|
// deprecated
|
|
const regex = fn;
|
|
fn = (val, def) => {
|
|
const m = regex.exec(val);
|
|
return m ? m[0] : def;
|
|
};
|
|
option.default(defaultValue).argParser(fn);
|
|
} else {
|
|
option.default(fn);
|
|
}
|
|
|
|
return this.addOption(option);
|
|
}
|
|
|
|
/**
|
|
* Define option with `flags`, `description`, and optional argument parsing function or `defaultValue` or both.
|
|
*
|
|
* The `flags` string contains the short and/or long flags, separated by comma, a pipe or space. A required
|
|
* option-argument is indicated by `<>` and an optional option-argument by `[]`.
|
|
*
|
|
* See the README for more details, and see also addOption() and requiredOption().
|
|
*
|
|
* @example
|
|
* program
|
|
* .option('-p, --pepper', 'add pepper')
|
|
* .option('-p, --pizza-type <TYPE>', 'type of pizza') // required option-argument
|
|
* .option('-c, --cheese [CHEESE]', 'add extra cheese', 'mozzarella') // optional option-argument with default
|
|
* .option('-t, --tip <VALUE>', 'add tip to purchase cost', parseFloat) // custom parse function
|
|
*
|
|
* @param {string} flags
|
|
* @param {string} [description]
|
|
* @param {(Function|*)} [parseArg] - custom option processing function or default value
|
|
* @param {*} [defaultValue]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
option(flags, description, parseArg, defaultValue) {
|
|
return this._optionEx({}, flags, description, parseArg, 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 contains the short and/or long flags, separated by comma, a pipe or space.
|
|
*
|
|
* @param {string} flags
|
|
* @param {string} [description]
|
|
* @param {(Function|*)} [parseArg] - custom option processing function or default value
|
|
* @param {*} [defaultValue]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
requiredOption(flags, description, parseArg, defaultValue) {
|
|
return this._optionEx(
|
|
{ mandatory: true },
|
|
flags,
|
|
description,
|
|
parseArg,
|
|
defaultValue,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Alter parsing of short flags with optional values.
|
|
*
|
|
* @example
|
|
* // for `.option('-f,--flag [value]'):
|
|
* program.combineFlagAndOptionalValue(true); // `-f80` is treated like `--flag=80`, this is the default behaviour
|
|
* program.combineFlagAndOptionalValue(false) // `-fb` is treated like `-f -b`
|
|
*
|
|
* @param {boolean} [combine] - if `true` or omitted, an optional value can be specified directly after the flag.
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
combineFlagAndOptionalValue(combine = true) {
|
|
this._combineFlagAndOptionalValue = !!combine;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Allow unknown options on the command line.
|
|
*
|
|
* @param {boolean} [allowUnknown] - if `true` or omitted, no error will be thrown for unknown options.
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
allowUnknownOption(allowUnknown = true) {
|
|
this._allowUnknownOption = !!allowUnknown;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Allow excess command-arguments on the command line. Pass false to make excess arguments an error.
|
|
*
|
|
* @param {boolean} [allowExcess] - if `true` or omitted, no error will be thrown for excess arguments.
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
allowExcessArguments(allowExcess = true) {
|
|
this._allowExcessArguments = !!allowExcess;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Enable positional options. Positional means global options are specified before subcommands which lets
|
|
* subcommands reuse the same option names, and also enables subcommands to turn on passThroughOptions.
|
|
* The default behaviour is non-positional and global options may appear anywhere on the command line.
|
|
*
|
|
* @param {boolean} [positional]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
enablePositionalOptions(positional = true) {
|
|
this._enablePositionalOptions = !!positional;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Pass through options that come after command-arguments rather than treat them as command-options,
|
|
* so actual command-options come before command-arguments. Turning this on for a subcommand requires
|
|
* positional options to have been enabled on the program (parent commands).
|
|
* The default behaviour is non-positional and options may appear before or after command-arguments.
|
|
*
|
|
* @param {boolean} [passThrough] for unknown options.
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
passThroughOptions(passThrough = true) {
|
|
this._passThroughOptions = !!passThrough;
|
|
this._checkForBrokenPassThrough();
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* @private
|
|
*/
|
|
|
|
_checkForBrokenPassThrough() {
|
|
if (
|
|
this.parent &&
|
|
this._passThroughOptions &&
|
|
!this.parent._enablePositionalOptions
|
|
) {
|
|
throw new Error(
|
|
`passThroughOptions cannot be used for '${this._name}' without turning on enablePositionalOptions for parent command(s)`,
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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} [storeAsProperties=true]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
storeOptionsAsProperties(storeAsProperties = true) {
|
|
if (this.options.length) {
|
|
throw new Error('call .storeOptionsAsProperties() before adding options');
|
|
}
|
|
if (Object.keys(this._optionValues).length) {
|
|
throw new Error(
|
|
'call .storeOptionsAsProperties() before setting option values',
|
|
);
|
|
}
|
|
this._storeOptionsAsProperties = !!storeAsProperties;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Retrieve option value.
|
|
*
|
|
* @param {string} key
|
|
* @return {object} value
|
|
*/
|
|
|
|
getOptionValue(key) {
|
|
if (this._storeOptionsAsProperties) {
|
|
return this[key];
|
|
}
|
|
return this._optionValues[key];
|
|
}
|
|
|
|
/**
|
|
* Store option value.
|
|
*
|
|
* @param {string} key
|
|
* @param {object} value
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
setOptionValue(key, value) {
|
|
return this.setOptionValueWithSource(key, value, undefined);
|
|
}
|
|
|
|
/**
|
|
* Store option value and where the value came from.
|
|
*
|
|
* @param {string} key
|
|
* @param {object} value
|
|
* @param {string} source - expected values are default/config/env/cli/implied
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
setOptionValueWithSource(key, value, source) {
|
|
if (this._storeOptionsAsProperties) {
|
|
this[key] = value;
|
|
} else {
|
|
this._optionValues[key] = value;
|
|
}
|
|
this._optionValueSources[key] = source;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Get source of option value.
|
|
* Expected values are default | config | env | cli | implied
|
|
*
|
|
* @param {string} key
|
|
* @return {string}
|
|
*/
|
|
|
|
getOptionValueSource(key) {
|
|
return this._optionValueSources[key];
|
|
}
|
|
|
|
/**
|
|
* Get source of option value. See also .optsWithGlobals().
|
|
* Expected values are default | config | env | cli | implied
|
|
*
|
|
* @param {string} key
|
|
* @return {string}
|
|
*/
|
|
|
|
getOptionValueSourceWithGlobals(key) {
|
|
// global overwrites local, like optsWithGlobals
|
|
let source;
|
|
this._getCommandAndAncestors().forEach((cmd) => {
|
|
if (cmd.getOptionValueSource(key) !== undefined) {
|
|
source = cmd.getOptionValueSource(key);
|
|
}
|
|
});
|
|
return source;
|
|
}
|
|
|
|
/**
|
|
* Get user arguments from implied or explicit arguments.
|
|
* Side-effects: set _scriptPath if args included script. Used for default program name, and subcommand searches.
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
_prepareUserArgs(argv, parseOptions) {
|
|
if (argv !== undefined && !Array.isArray(argv)) {
|
|
throw new Error('first parameter to parse must be array or undefined');
|
|
}
|
|
parseOptions = parseOptions || {};
|
|
|
|
// auto-detect argument conventions if nothing supplied
|
|
if (argv === undefined && parseOptions.from === undefined) {
|
|
if (process.versions?.electron) {
|
|
parseOptions.from = 'electron';
|
|
}
|
|
// check node specific options for scenarios where user CLI args follow executable without scriptname
|
|
const execArgv = process.execArgv ?? [];
|
|
if (
|
|
execArgv.includes('-e') ||
|
|
execArgv.includes('--eval') ||
|
|
execArgv.includes('-p') ||
|
|
execArgv.includes('--print')
|
|
) {
|
|
parseOptions.from = 'eval'; // internal usage, not documented
|
|
}
|
|
}
|
|
|
|
// default to using process.argv
|
|
if (argv === undefined) {
|
|
argv = process.argv;
|
|
}
|
|
this.rawArgs = argv.slice();
|
|
|
|
// extract the user args and scriptPath
|
|
let userArgs;
|
|
switch (parseOptions.from) {
|
|
case undefined:
|
|
case 'node':
|
|
this._scriptPath = argv[1];
|
|
userArgs = argv.slice(2);
|
|
break;
|
|
case 'electron':
|
|
// @ts-ignore: because defaultApp is an unknown property
|
|
if (process.defaultApp) {
|
|
this._scriptPath = argv[1];
|
|
userArgs = argv.slice(2);
|
|
} else {
|
|
userArgs = argv.slice(1);
|
|
}
|
|
break;
|
|
case 'user':
|
|
userArgs = argv.slice(0);
|
|
break;
|
|
case 'eval':
|
|
userArgs = argv.slice(1);
|
|
break;
|
|
default:
|
|
throw new Error(
|
|
`unexpected parse option { from: '${parseOptions.from}' }`,
|
|
);
|
|
}
|
|
|
|
// Find default name for program from arguments.
|
|
if (!this._name && this._scriptPath)
|
|
this.nameFromFilename(this._scriptPath);
|
|
this._name = this._name || 'program';
|
|
|
|
return userArgs;
|
|
}
|
|
|
|
/**
|
|
* Parse `argv`, setting options and invoking commands when defined.
|
|
*
|
|
* Use parseAsync instead of parse if any of your action handlers are async.
|
|
*
|
|
* Call with no parameters to parse `process.argv`. Detects Electron and special node options like `node --eval`. Easy mode!
|
|
*
|
|
* Or call with an array of strings to parse, and optionally where the user arguments start by specifying where the arguments are `from`:
|
|
* - `'node'`: default, `argv[0]` is the application and `argv[1]` is the script being run, with user arguments after that
|
|
* - `'electron'`: `argv[0]` is the application and `argv[1]` varies depending on whether the electron application is packaged
|
|
* - `'user'`: just user arguments
|
|
*
|
|
* @example
|
|
* program.parse(); // parse process.argv and auto-detect electron and special node flags
|
|
* program.parse(process.argv); // assume argv[0] is app and argv[1] is script
|
|
* 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
|
|
*/
|
|
|
|
parse(argv, parseOptions) {
|
|
const userArgs = this._prepareUserArgs(argv, parseOptions);
|
|
this._parseCommand([], userArgs);
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Parse `argv`, setting options and invoking commands when defined.
|
|
*
|
|
* Call with no parameters to parse `process.argv`. Detects Electron and special node options like `node --eval`. Easy mode!
|
|
*
|
|
* Or call with an array of strings to parse, and optionally where the user arguments start by specifying where the arguments are `from`:
|
|
* - `'node'`: default, `argv[0]` is the application and `argv[1]` is the script being run, with user arguments after that
|
|
* - `'electron'`: `argv[0]` is the application and `argv[1]` varies depending on whether the electron application is packaged
|
|
* - `'user'`: just user arguments
|
|
*
|
|
* @example
|
|
* await program.parseAsync(); // parse process.argv and auto-detect electron and special node flags
|
|
* await program.parseAsync(process.argv); // assume argv[0] is app and argv[1] is script
|
|
* await 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}
|
|
*/
|
|
|
|
async parseAsync(argv, parseOptions) {
|
|
const userArgs = this._prepareUserArgs(argv, parseOptions);
|
|
await this._parseCommand([], userArgs);
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Execute a sub-command executable.
|
|
*
|
|
* @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', '.tsx', '.mjs', '.cjs'];
|
|
|
|
function findFile(baseDir, baseName) {
|
|
// Look for specified file
|
|
const localBin = path.resolve(baseDir, baseName);
|
|
if (fs.existsSync(localBin)) return localBin;
|
|
|
|
// Stop looking if candidate already has an expected extension.
|
|
if (sourceExt.includes(path.extname(baseName))) return undefined;
|
|
|
|
// Try all the extensions.
|
|
const foundExt = sourceExt.find((ext) =>
|
|
fs.existsSync(`${localBin}${ext}`),
|
|
);
|
|
if (foundExt) return `${localBin}${foundExt}`;
|
|
|
|
return undefined;
|
|
}
|
|
|
|
// Not checking for help first. Unlikely to have mandatory and executable, and can't robustly test for help flags in external command.
|
|
this._checkForMissingMandatoryOptions();
|
|
this._checkForConflictingOptions();
|
|
|
|
// executableFile and executableDir might be full path, or just a name
|
|
let executableFile =
|
|
subcommand._executableFile || `${this._name}-${subcommand._name}`;
|
|
let executableDir = this._executableDir || '';
|
|
if (this._scriptPath) {
|
|
let resolvedScriptPath; // resolve possible symlink for installed npm binary
|
|
try {
|
|
resolvedScriptPath = fs.realpathSync(this._scriptPath);
|
|
} catch (err) {
|
|
resolvedScriptPath = this._scriptPath;
|
|
}
|
|
executableDir = path.resolve(
|
|
path.dirname(resolvedScriptPath),
|
|
executableDir,
|
|
);
|
|
}
|
|
|
|
// Look for a local file in preference to a command in PATH.
|
|
if (executableDir) {
|
|
let localFile = findFile(executableDir, executableFile);
|
|
|
|
// Legacy search using prefix of script name instead of command name
|
|
if (!localFile && !subcommand._executableFile && this._scriptPath) {
|
|
const legacyName = path.basename(
|
|
this._scriptPath,
|
|
path.extname(this._scriptPath),
|
|
);
|
|
if (legacyName !== this._name) {
|
|
localFile = findFile(
|
|
executableDir,
|
|
`${legacyName}-${subcommand._name}`,
|
|
);
|
|
}
|
|
}
|
|
executableFile = localFile || executableFile;
|
|
}
|
|
|
|
launchWithNode = sourceExt.includes(path.extname(executableFile));
|
|
|
|
let proc;
|
|
if (process.platform !== 'win32') {
|
|
if (launchWithNode) {
|
|
args.unshift(executableFile);
|
|
// add executable arguments to spawn
|
|
args = incrementNodeInspectorPort(process.execArgv).concat(args);
|
|
|
|
proc = childProcess.spawn(process.argv[0], args, { stdio: 'inherit' });
|
|
} else {
|
|
proc = childProcess.spawn(executableFile, args, { stdio: 'inherit' });
|
|
}
|
|
} else {
|
|
args.unshift(executableFile);
|
|
// add executable arguments to spawn
|
|
args = incrementNodeInspectorPort(process.execArgv).concat(args);
|
|
proc = childProcess.spawn(process.execPath, args, { stdio: 'inherit' });
|
|
}
|
|
|
|
if (!proc.killed) {
|
|
// testing mainly to avoid leak warnings during unit tests with mocked spawn
|
|
const signals = ['SIGUSR1', 'SIGUSR2', 'SIGTERM', 'SIGINT', 'SIGHUP'];
|
|
signals.forEach((signal) => {
|
|
process.on(signal, () => {
|
|
if (proc.killed === false && proc.exitCode === null) {
|
|
// @ts-ignore because signals not typed to known strings
|
|
proc.kill(signal);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
// By default terminate process when spawned process terminates.
|
|
const exitCallback = this._exitCallback;
|
|
proc.on('close', (code) => {
|
|
code = code ?? 1; // code is null if spawned process terminated due to a signal
|
|
if (!exitCallback) {
|
|
process.exit(code);
|
|
} else {
|
|
exitCallback(
|
|
new CommanderError(
|
|
code,
|
|
'commander.executeSubCommandAsync',
|
|
'(close)',
|
|
),
|
|
);
|
|
}
|
|
});
|
|
proc.on('error', (err) => {
|
|
// @ts-ignore: because err.code is an unknown property
|
|
if (err.code === 'ENOENT') {
|
|
const executableDirMessage = executableDir
|
|
? `searched for local subcommand relative to directory '${executableDir}'`
|
|
: 'no directory for search for local subcommand, use .executableDir() to supply a custom directory';
|
|
const executableMissing = `'${executableFile}' does not exist
|
|
- if '${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 or path
|
|
- ${executableDirMessage}`;
|
|
throw new Error(executableMissing);
|
|
// @ts-ignore: because err.code is an unknown property
|
|
} else if (err.code === 'EACCES') {
|
|
throw new Error(`'${executableFile}' 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;
|
|
}
|
|
|
|
/**
|
|
* @private
|
|
*/
|
|
|
|
_dispatchSubcommand(commandName, operands, unknown) {
|
|
const subCommand = this._findCommand(commandName);
|
|
if (!subCommand) this.help({ error: true });
|
|
|
|
let promiseChain;
|
|
promiseChain = this._chainOrCallSubCommandHook(
|
|
promiseChain,
|
|
subCommand,
|
|
'preSubcommand',
|
|
);
|
|
promiseChain = this._chainOrCall(promiseChain, () => {
|
|
if (subCommand._executableHandler) {
|
|
this._executeSubCommand(subCommand, operands.concat(unknown));
|
|
} else {
|
|
return subCommand._parseCommand(operands, unknown);
|
|
}
|
|
});
|
|
return promiseChain;
|
|
}
|
|
|
|
/**
|
|
* Invoke help directly if possible, or dispatch if necessary.
|
|
* e.g. help foo
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
_dispatchHelpCommand(subcommandName) {
|
|
if (!subcommandName) {
|
|
this.help();
|
|
}
|
|
const subCommand = this._findCommand(subcommandName);
|
|
if (subCommand && !subCommand._executableHandler) {
|
|
subCommand.help();
|
|
}
|
|
|
|
// Fallback to parsing the help flag to invoke the help.
|
|
return this._dispatchSubcommand(
|
|
subcommandName,
|
|
[],
|
|
[this._getHelpOption()?.long ?? this._getHelpOption()?.short ?? '--help'],
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Check this.args against expected this.registeredArguments.
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
_checkNumberOfArguments() {
|
|
// too few
|
|
this.registeredArguments.forEach((arg, i) => {
|
|
if (arg.required && this.args[i] == null) {
|
|
this.missingArgument(arg.name());
|
|
}
|
|
});
|
|
// too many
|
|
if (
|
|
this.registeredArguments.length > 0 &&
|
|
this.registeredArguments[this.registeredArguments.length - 1].variadic
|
|
) {
|
|
return;
|
|
}
|
|
if (this.args.length > this.registeredArguments.length) {
|
|
this._excessArguments(this.args);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Process this.args using this.registeredArguments and save as this.processedArgs!
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
_processArguments() {
|
|
const myParseArg = (argument, value, previous) => {
|
|
// Extra processing for nice error message on parsing failure.
|
|
let parsedValue = value;
|
|
if (value !== null && argument.parseArg) {
|
|
const invalidValueMessage = `error: command-argument value '${value}' is invalid for argument '${argument.name()}'.`;
|
|
parsedValue = this._callParseArg(
|
|
argument,
|
|
value,
|
|
previous,
|
|
invalidValueMessage,
|
|
);
|
|
}
|
|
return parsedValue;
|
|
};
|
|
|
|
this._checkNumberOfArguments();
|
|
|
|
const processedArgs = [];
|
|
this.registeredArguments.forEach((declaredArg, index) => {
|
|
let value = declaredArg.defaultValue;
|
|
if (declaredArg.variadic) {
|
|
// Collect together remaining arguments for passing together as an array.
|
|
if (index < this.args.length) {
|
|
value = this.args.slice(index);
|
|
if (declaredArg.parseArg) {
|
|
value = value.reduce((processed, v) => {
|
|
return myParseArg(declaredArg, v, processed);
|
|
}, declaredArg.defaultValue);
|
|
}
|
|
} else if (value === undefined) {
|
|
value = [];
|
|
}
|
|
} else if (index < this.args.length) {
|
|
value = this.args[index];
|
|
if (declaredArg.parseArg) {
|
|
value = myParseArg(declaredArg, value, declaredArg.defaultValue);
|
|
}
|
|
}
|
|
processedArgs[index] = value;
|
|
});
|
|
this.processedArgs = processedArgs;
|
|
}
|
|
|
|
/**
|
|
* Once we have a promise we chain, but call synchronously until then.
|
|
*
|
|
* @param {(Promise|undefined)} promise
|
|
* @param {Function} fn
|
|
* @return {(Promise|undefined)}
|
|
* @private
|
|
*/
|
|
|
|
_chainOrCall(promise, fn) {
|
|
// thenable
|
|
if (promise && promise.then && typeof promise.then === 'function') {
|
|
// already have a promise, chain callback
|
|
return promise.then(() => fn());
|
|
}
|
|
// callback might return a promise
|
|
return fn();
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {(Promise|undefined)} promise
|
|
* @param {string} event
|
|
* @return {(Promise|undefined)}
|
|
* @private
|
|
*/
|
|
|
|
_chainOrCallHooks(promise, event) {
|
|
let result = promise;
|
|
const hooks = [];
|
|
this._getCommandAndAncestors()
|
|
.reverse()
|
|
.filter((cmd) => cmd._lifeCycleHooks[event] !== undefined)
|
|
.forEach((hookedCommand) => {
|
|
hookedCommand._lifeCycleHooks[event].forEach((callback) => {
|
|
hooks.push({ hookedCommand, callback });
|
|
});
|
|
});
|
|
if (event === 'postAction') {
|
|
hooks.reverse();
|
|
}
|
|
|
|
hooks.forEach((hookDetail) => {
|
|
result = this._chainOrCall(result, () => {
|
|
return hookDetail.callback(hookDetail.hookedCommand, this);
|
|
});
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {(Promise|undefined)} promise
|
|
* @param {Command} subCommand
|
|
* @param {string} event
|
|
* @return {(Promise|undefined)}
|
|
* @private
|
|
*/
|
|
|
|
_chainOrCallSubCommandHook(promise, subCommand, event) {
|
|
let result = promise;
|
|
if (this._lifeCycleHooks[event] !== undefined) {
|
|
this._lifeCycleHooks[event].forEach((hook) => {
|
|
result = this._chainOrCall(result, () => {
|
|
return hook(this, subCommand);
|
|
});
|
|
});
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Process arguments in context of this command.
|
|
* Returns action result, in case it is a promise.
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
_parseCommand(operands, unknown) {
|
|
const parsed = this.parseOptions(unknown);
|
|
this._parseOptionsEnv(); // after cli, so parseArg not called on both cli and env
|
|
this._parseOptionsImplied();
|
|
operands = operands.concat(parsed.operands);
|
|
unknown = parsed.unknown;
|
|
this.args = operands.concat(unknown);
|
|
|
|
if (operands && this._findCommand(operands[0])) {
|
|
return this._dispatchSubcommand(operands[0], operands.slice(1), unknown);
|
|
}
|
|
if (
|
|
this._getHelpCommand() &&
|
|
operands[0] === this._getHelpCommand().name()
|
|
) {
|
|
return this._dispatchHelpCommand(operands[1]);
|
|
}
|
|
if (this._defaultCommandName) {
|
|
this._outputHelpIfRequested(unknown); // Run the help for default command from parent rather than passing to default command
|
|
return this._dispatchSubcommand(
|
|
this._defaultCommandName,
|
|
operands,
|
|
unknown,
|
|
);
|
|
}
|
|
if (
|
|
this.commands.length &&
|
|
this.args.length === 0 &&
|
|
!this._actionHandler &&
|
|
!this._defaultCommandName
|
|
) {
|
|
// probably missing subcommand and no handler, user needs help (and exit)
|
|
this.help({ error: true });
|
|
}
|
|
|
|
this._outputHelpIfRequested(parsed.unknown);
|
|
this._checkForMissingMandatoryOptions();
|
|
this._checkForConflictingOptions();
|
|
|
|
// We do not always call this check to avoid masking a "better" error, like unknown command.
|
|
const checkForUnknownOptions = () => {
|
|
if (parsed.unknown.length > 0) {
|
|
this.unknownOption(parsed.unknown[0]);
|
|
}
|
|
};
|
|
|
|
const commandEvent = `command:${this.name()}`;
|
|
if (this._actionHandler) {
|
|
checkForUnknownOptions();
|
|
this._processArguments();
|
|
|
|
let promiseChain;
|
|
promiseChain = this._chainOrCallHooks(promiseChain, 'preAction');
|
|
promiseChain = this._chainOrCall(promiseChain, () =>
|
|
this._actionHandler(this.processedArgs),
|
|
);
|
|
if (this.parent) {
|
|
promiseChain = this._chainOrCall(promiseChain, () => {
|
|
this.parent.emit(commandEvent, operands, unknown); // legacy
|
|
});
|
|
}
|
|
promiseChain = this._chainOrCallHooks(promiseChain, 'postAction');
|
|
return promiseChain;
|
|
}
|
|
if (this.parent && this.parent.listenerCount(commandEvent)) {
|
|
checkForUnknownOptions();
|
|
this._processArguments();
|
|
this.parent.emit(commandEvent, operands, unknown); // legacy
|
|
} else if (operands.length) {
|
|
if (this._findCommand('*')) {
|
|
// legacy default command
|
|
return this._dispatchSubcommand('*', operands, unknown);
|
|
}
|
|
if (this.listenerCount('command:*')) {
|
|
// skip option check, emit event for possible misspelling suggestion
|
|
this.emit('command:*', operands, unknown);
|
|
} else if (this.commands.length) {
|
|
this.unknownCommand();
|
|
} else {
|
|
checkForUnknownOptions();
|
|
this._processArguments();
|
|
}
|
|
} else if (this.commands.length) {
|
|
checkForUnknownOptions();
|
|
// This command has subcommands and nothing hooked up at this level, so display help (and exit).
|
|
this.help({ error: true });
|
|
} else {
|
|
checkForUnknownOptions();
|
|
this._processArguments();
|
|
// fall through for caller to handle after calling .parse()
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Find matching command.
|
|
*
|
|
* @private
|
|
* @return {Command | undefined}
|
|
*/
|
|
_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}
|
|
* @package
|
|
*/
|
|
|
|
_findOption(arg) {
|
|
return this.options.find((option) => option.is(arg));
|
|
}
|
|
|
|
/**
|
|
* Display an error message if a mandatory option does not have a value.
|
|
* Called after checking for help flags in leaf subcommand.
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
_checkForMissingMandatoryOptions() {
|
|
// Walk up hierarchy so can call in subcommand after checking for displaying help.
|
|
this._getCommandAndAncestors().forEach((cmd) => {
|
|
cmd.options.forEach((anOption) => {
|
|
if (
|
|
anOption.mandatory &&
|
|
cmd.getOptionValue(anOption.attributeName()) === undefined
|
|
) {
|
|
cmd.missingMandatoryOptionValue(anOption);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Display an error message if conflicting options are used together in this.
|
|
*
|
|
* @private
|
|
*/
|
|
_checkForConflictingLocalOptions() {
|
|
const definedNonDefaultOptions = this.options.filter((option) => {
|
|
const optionKey = option.attributeName();
|
|
if (this.getOptionValue(optionKey) === undefined) {
|
|
return false;
|
|
}
|
|
return this.getOptionValueSource(optionKey) !== 'default';
|
|
});
|
|
|
|
const optionsWithConflicting = definedNonDefaultOptions.filter(
|
|
(option) => option.conflictsWith.length > 0,
|
|
);
|
|
|
|
optionsWithConflicting.forEach((option) => {
|
|
const conflictingAndDefined = definedNonDefaultOptions.find((defined) =>
|
|
option.conflictsWith.includes(defined.attributeName()),
|
|
);
|
|
if (conflictingAndDefined) {
|
|
this._conflictingOption(option, conflictingAndDefined);
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Display an error message if conflicting options are used together.
|
|
* Called after checking for help flags in leaf subcommand.
|
|
*
|
|
* @private
|
|
*/
|
|
_checkForConflictingOptions() {
|
|
// Walk up hierarchy so can call in subcommand after checking for displaying help.
|
|
this._getCommandAndAncestors().forEach((cmd) => {
|
|
cmd._checkForConflictingLocalOptions();
|
|
});
|
|
}
|
|
|
|
/**
|
|
* 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[]}}
|
|
*/
|
|
|
|
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
|
|
let activeVariadicOption = null;
|
|
while (args.length) {
|
|
const arg = args.shift();
|
|
|
|
// literal
|
|
if (arg === '--') {
|
|
if (dest === unknown) dest.push(arg);
|
|
dest.push(...args);
|
|
break;
|
|
}
|
|
|
|
if (activeVariadicOption && !maybeOption(arg)) {
|
|
this.emit(`option:${activeVariadicOption.name()}`, arg);
|
|
continue;
|
|
}
|
|
activeVariadicOption = null;
|
|
|
|
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:${option.name()}`);
|
|
}
|
|
activeVariadicOption = option.variadic ? option : null;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Look for combo options following single dash, eat first one if known.
|
|
if (arg.length > 2 && arg[0] === '-' && arg[1] !== '-') {
|
|
const option = this._findOption(`-${arg[1]}`);
|
|
if (option) {
|
|
if (
|
|
option.required ||
|
|
(option.optional && this._combineFlagAndOptionalValue)
|
|
) {
|
|
// 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;
|
|
}
|
|
}
|
|
|
|
// Not a recognised option by this command.
|
|
// Might be a command-argument, or subcommand option, or unknown option, or help command or option.
|
|
|
|
// An unknown option means further arguments also classified as unknown so can be reprocessed by subcommands.
|
|
if (maybeOption(arg)) {
|
|
dest = unknown;
|
|
}
|
|
|
|
// If using positionalOptions, stop processing our options at subcommand.
|
|
if (
|
|
(this._enablePositionalOptions || this._passThroughOptions) &&
|
|
operands.length === 0 &&
|
|
unknown.length === 0
|
|
) {
|
|
if (this._findCommand(arg)) {
|
|
operands.push(arg);
|
|
if (args.length > 0) unknown.push(...args);
|
|
break;
|
|
} else if (
|
|
this._getHelpCommand() &&
|
|
arg === this._getHelpCommand().name()
|
|
) {
|
|
operands.push(arg);
|
|
if (args.length > 0) operands.push(...args);
|
|
break;
|
|
} else if (this._defaultCommandName) {
|
|
unknown.push(arg);
|
|
if (args.length > 0) unknown.push(...args);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If using passThroughOptions, stop processing options at first command-argument.
|
|
if (this._passThroughOptions) {
|
|
dest.push(arg);
|
|
if (args.length > 0) dest.push(...args);
|
|
break;
|
|
}
|
|
|
|
// add arg
|
|
dest.push(arg);
|
|
}
|
|
|
|
return { operands, unknown };
|
|
}
|
|
|
|
/**
|
|
* Return an object containing local option values as key-value pairs.
|
|
*
|
|
* @return {object}
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Return an object containing merged local and global option values as key-value pairs.
|
|
*
|
|
* @return {object}
|
|
*/
|
|
optsWithGlobals() {
|
|
// globals overwrite locals
|
|
return this._getCommandAndAncestors().reduce(
|
|
(combinedOptions, cmd) => Object.assign(combinedOptions, cmd.opts()),
|
|
{},
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Display error message and exit (or call exitOverride).
|
|
*
|
|
* @param {string} message
|
|
* @param {object} [errorOptions]
|
|
* @param {string} [errorOptions.code] - an id string representing the error
|
|
* @param {number} [errorOptions.exitCode] - used with process.exit
|
|
*/
|
|
error(message, errorOptions) {
|
|
// output handling
|
|
this._outputConfiguration.outputError(
|
|
`${message}\n`,
|
|
this._outputConfiguration.writeErr,
|
|
);
|
|
if (typeof this._showHelpAfterError === 'string') {
|
|
this._outputConfiguration.writeErr(`${this._showHelpAfterError}\n`);
|
|
} else if (this._showHelpAfterError) {
|
|
this._outputConfiguration.writeErr('\n');
|
|
this.outputHelp({ error: true });
|
|
}
|
|
|
|
// exit handling
|
|
const config = errorOptions || {};
|
|
const exitCode = config.exitCode || 1;
|
|
const code = config.code || 'commander.error';
|
|
this._exit(exitCode, code, message);
|
|
}
|
|
|
|
/**
|
|
* Apply any option related environment variables, if option does
|
|
* not have a value from cli or client code.
|
|
*
|
|
* @private
|
|
*/
|
|
_parseOptionsEnv() {
|
|
this.options.forEach((option) => {
|
|
if (option.envVar && option.envVar in process.env) {
|
|
const optionKey = option.attributeName();
|
|
// Priority check. Do not overwrite cli or options from unknown source (client-code).
|
|
if (
|
|
this.getOptionValue(optionKey) === undefined ||
|
|
['default', 'config', 'env'].includes(
|
|
this.getOptionValueSource(optionKey),
|
|
)
|
|
) {
|
|
if (option.required || option.optional) {
|
|
// option can take a value
|
|
// keep very simple, optional always takes value
|
|
this.emit(`optionEnv:${option.name()}`, process.env[option.envVar]);
|
|
} else {
|
|
// boolean
|
|
// keep very simple, only care that envVar defined and not the value
|
|
this.emit(`optionEnv:${option.name()}`);
|
|
}
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Apply any implied option values, if option is undefined or default value.
|
|
*
|
|
* @private
|
|
*/
|
|
_parseOptionsImplied() {
|
|
const dualHelper = new DualOptions(this.options);
|
|
const hasCustomOptionValue = (optionKey) => {
|
|
return (
|
|
this.getOptionValue(optionKey) !== undefined &&
|
|
!['default', 'implied'].includes(this.getOptionValueSource(optionKey))
|
|
);
|
|
};
|
|
this.options
|
|
.filter(
|
|
(option) =>
|
|
option.implied !== undefined &&
|
|
hasCustomOptionValue(option.attributeName()) &&
|
|
dualHelper.valueFromOption(
|
|
this.getOptionValue(option.attributeName()),
|
|
option,
|
|
),
|
|
)
|
|
.forEach((option) => {
|
|
Object.keys(option.implied)
|
|
.filter((impliedKey) => !hasCustomOptionValue(impliedKey))
|
|
.forEach((impliedKey) => {
|
|
this.setOptionValueWithSource(
|
|
impliedKey,
|
|
option.implied[impliedKey],
|
|
'implied',
|
|
);
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Argument `name` is missing.
|
|
*
|
|
* @param {string} name
|
|
* @private
|
|
*/
|
|
|
|
missingArgument(name) {
|
|
const message = `error: missing required argument '${name}'`;
|
|
this.error(message, { code: 'commander.missingArgument' });
|
|
}
|
|
|
|
/**
|
|
* `Option` is missing an argument.
|
|
*
|
|
* @param {Option} option
|
|
* @private
|
|
*/
|
|
|
|
optionMissingArgument(option) {
|
|
const message = `error: option '${option.flags}' argument missing`;
|
|
this.error(message, { code: 'commander.optionMissingArgument' });
|
|
}
|
|
|
|
/**
|
|
* `Option` does not have a value, and is a mandatory option.
|
|
*
|
|
* @param {Option} option
|
|
* @private
|
|
*/
|
|
|
|
missingMandatoryOptionValue(option) {
|
|
const message = `error: required option '${option.flags}' not specified`;
|
|
this.error(message, { code: 'commander.missingMandatoryOptionValue' });
|
|
}
|
|
|
|
/**
|
|
* `Option` conflicts with another option.
|
|
*
|
|
* @param {Option} option
|
|
* @param {Option} conflictingOption
|
|
* @private
|
|
*/
|
|
_conflictingOption(option, conflictingOption) {
|
|
// The calling code does not know whether a negated option is the source of the
|
|
// value, so do some work to take an educated guess.
|
|
const findBestOptionFromValue = (option) => {
|
|
const optionKey = option.attributeName();
|
|
const optionValue = this.getOptionValue(optionKey);
|
|
const negativeOption = this.options.find(
|
|
(target) => target.negate && optionKey === target.attributeName(),
|
|
);
|
|
const positiveOption = this.options.find(
|
|
(target) => !target.negate && optionKey === target.attributeName(),
|
|
);
|
|
if (
|
|
negativeOption &&
|
|
((negativeOption.presetArg === undefined && optionValue === false) ||
|
|
(negativeOption.presetArg !== undefined &&
|
|
optionValue === negativeOption.presetArg))
|
|
) {
|
|
return negativeOption;
|
|
}
|
|
return positiveOption || option;
|
|
};
|
|
|
|
const getErrorMessage = (option) => {
|
|
const bestOption = findBestOptionFromValue(option);
|
|
const optionKey = bestOption.attributeName();
|
|
const source = this.getOptionValueSource(optionKey);
|
|
if (source === 'env') {
|
|
return `environment variable '${bestOption.envVar}'`;
|
|
}
|
|
return `option '${bestOption.flags}'`;
|
|
};
|
|
|
|
const message = `error: ${getErrorMessage(option)} cannot be used with ${getErrorMessage(conflictingOption)}`;
|
|
this.error(message, { code: 'commander.conflictingOption' });
|
|
}
|
|
|
|
/**
|
|
* Unknown option `flag`.
|
|
*
|
|
* @param {string} flag
|
|
* @private
|
|
*/
|
|
|
|
unknownOption(flag) {
|
|
if (this._allowUnknownOption) return;
|
|
let suggestion = '';
|
|
|
|
if (flag.startsWith('--') && this._showSuggestionAfterError) {
|
|
// Looping to pick up the global options too
|
|
let candidateFlags = [];
|
|
// eslint-disable-next-line @typescript-eslint/no-this-alias
|
|
let command = this;
|
|
do {
|
|
const moreFlags = command
|
|
.createHelp()
|
|
.visibleOptions(command)
|
|
.filter((option) => option.long)
|
|
.map((option) => option.long);
|
|
candidateFlags = candidateFlags.concat(moreFlags);
|
|
command = command.parent;
|
|
} while (command && !command._enablePositionalOptions);
|
|
suggestion = suggestSimilar(flag, candidateFlags);
|
|
}
|
|
|
|
const message = `error: unknown option '${flag}'${suggestion}`;
|
|
this.error(message, { code: 'commander.unknownOption' });
|
|
}
|
|
|
|
/**
|
|
* Excess arguments, more than expected.
|
|
*
|
|
* @param {string[]} receivedArgs
|
|
* @private
|
|
*/
|
|
|
|
_excessArguments(receivedArgs) {
|
|
if (this._allowExcessArguments) return;
|
|
|
|
const expected = this.registeredArguments.length;
|
|
const s = expected === 1 ? '' : 's';
|
|
const forSubcommand = this.parent ? ` for '${this.name()}'` : '';
|
|
const message = `error: too many arguments${forSubcommand}. Expected ${expected} argument${s} but got ${receivedArgs.length}.`;
|
|
this.error(message, { code: 'commander.excessArguments' });
|
|
}
|
|
|
|
/**
|
|
* Unknown command.
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
unknownCommand() {
|
|
const unknownName = this.args[0];
|
|
let suggestion = '';
|
|
|
|
if (this._showSuggestionAfterError) {
|
|
const candidateNames = [];
|
|
this.createHelp()
|
|
.visibleCommands(this)
|
|
.forEach((command) => {
|
|
candidateNames.push(command.name());
|
|
// just visible alias
|
|
if (command.alias()) candidateNames.push(command.alias());
|
|
});
|
|
suggestion = suggestSimilar(unknownName, candidateNames);
|
|
}
|
|
|
|
const message = `error: unknown command '${unknownName}'${suggestion}`;
|
|
this.error(message, { code: 'commander.unknownCommand' });
|
|
}
|
|
|
|
/**
|
|
* Get or set the program version.
|
|
*
|
|
* This method auto-registers the "-V, --version" option which will print the version number.
|
|
*
|
|
* You can optionally supply the flags and description to override the defaults.
|
|
*
|
|
* @param {string} [str]
|
|
* @param {string} [flags]
|
|
* @param {string} [description]
|
|
* @return {(this | string | undefined)} `this` command for chaining, or version string if no arguments
|
|
*/
|
|
|
|
version(str, flags, description) {
|
|
if (str === undefined) return this._version;
|
|
this._version = str;
|
|
flags = flags || '-V, --version';
|
|
description = description || 'output the version number';
|
|
const versionOption = this.createOption(flags, description);
|
|
this._versionOptionName = versionOption.attributeName();
|
|
this._registerOption(versionOption);
|
|
|
|
this.on('option:' + versionOption.name(), () => {
|
|
this._outputConfiguration.writeOut(`${str}\n`);
|
|
this._exit(0, 'commander.version', str);
|
|
});
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Set the description.
|
|
*
|
|
* @param {string} [str]
|
|
* @param {object} [argsDescription]
|
|
* @return {(string|Command)}
|
|
*/
|
|
description(str, argsDescription) {
|
|
if (str === undefined && argsDescription === undefined)
|
|
return this._description;
|
|
this._description = str;
|
|
if (argsDescription) {
|
|
this._argsDescription = argsDescription;
|
|
}
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Set the summary. Used when listed as subcommand of parent.
|
|
*
|
|
* @param {string} [str]
|
|
* @return {(string|Command)}
|
|
*/
|
|
summary(str) {
|
|
if (str === undefined) return this._summary;
|
|
this._summary = str;
|
|
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)}
|
|
*/
|
|
|
|
alias(alias) {
|
|
if (alias === undefined) return this._aliases[0]; // just return first, for backwards compatibility
|
|
|
|
/** @type {Command} */
|
|
// eslint-disable-next-line @typescript-eslint/no-this-alias
|
|
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");
|
|
const matchingCommand = this.parent?._findCommand(alias);
|
|
if (matchingCommand) {
|
|
// c.f. _registerCommand
|
|
const existingCmd = [matchingCommand.name()]
|
|
.concat(matchingCommand.aliases())
|
|
.join('|');
|
|
throw new Error(
|
|
`cannot add alias '${alias}' to command '${this.name()}' as already have command '${existingCmd}'`,
|
|
);
|
|
}
|
|
|
|
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)}
|
|
*/
|
|
|
|
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)}
|
|
*/
|
|
|
|
usage(str) {
|
|
if (str === undefined) {
|
|
if (this._usage) return this._usage;
|
|
|
|
const args = this.registeredArguments.map((arg) => {
|
|
return humanReadableArgName(arg);
|
|
});
|
|
return []
|
|
.concat(
|
|
this.options.length || this._helpOption !== null ? '[options]' : [],
|
|
this.commands.length ? '[command]' : [],
|
|
this.registeredArguments.length ? args : [],
|
|
)
|
|
.join(' ');
|
|
}
|
|
|
|
this._usage = str;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Get or set the name of the command.
|
|
*
|
|
* @param {string} [str]
|
|
* @return {(string|Command)}
|
|
*/
|
|
|
|
name(str) {
|
|
if (str === undefined) return this._name;
|
|
this._name = str;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Set the name of the command from script filename, such as process.argv[1],
|
|
* or require.main.filename, or __filename.
|
|
*
|
|
* (Used internally and public although not documented in README.)
|
|
*
|
|
* @example
|
|
* program.nameFromFilename(require.main.filename);
|
|
*
|
|
* @param {string} filename
|
|
* @return {Command}
|
|
*/
|
|
|
|
nameFromFilename(filename) {
|
|
this._name = path.basename(filename, path.extname(filename));
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Get or set the directory for searching for executable subcommands of this command.
|
|
*
|
|
* @example
|
|
* program.executableDir(__dirname);
|
|
* // or
|
|
* program.executableDir('subcommands');
|
|
*
|
|
* @param {string} [path]
|
|
* @return {(string|null|Command)}
|
|
*/
|
|
|
|
executableDir(path) {
|
|
if (path === undefined) return this._executableDir;
|
|
this._executableDir = path;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Return program help documentation.
|
|
*
|
|
* @param {{ error: boolean }} [contextOptions] - pass {error:true} to wrap for stderr instead of stdout
|
|
* @return {string}
|
|
*/
|
|
|
|
helpInformation(contextOptions) {
|
|
const helper = this.createHelp();
|
|
if (helper.helpWidth === undefined) {
|
|
helper.helpWidth =
|
|
contextOptions && contextOptions.error
|
|
? this._outputConfiguration.getErrHelpWidth()
|
|
: this._outputConfiguration.getOutHelpWidth();
|
|
}
|
|
return helper.formatHelp(this, helper);
|
|
}
|
|
|
|
/**
|
|
* @private
|
|
*/
|
|
|
|
_getHelpContext(contextOptions) {
|
|
contextOptions = contextOptions || {};
|
|
const context = { error: !!contextOptions.error };
|
|
let write;
|
|
if (context.error) {
|
|
write = (arg) => this._outputConfiguration.writeErr(arg);
|
|
} else {
|
|
write = (arg) => this._outputConfiguration.writeOut(arg);
|
|
}
|
|
context.write = contextOptions.write || write;
|
|
context.command = this;
|
|
return context;
|
|
}
|
|
|
|
/**
|
|
* Output help information for this command.
|
|
*
|
|
* Outputs built-in help, and custom text added using `.addHelpText()`.
|
|
*
|
|
* @param {{ error: boolean } | Function} [contextOptions] - pass {error:true} to write to stderr instead of stdout
|
|
*/
|
|
|
|
outputHelp(contextOptions) {
|
|
let deprecatedCallback;
|
|
if (typeof contextOptions === 'function') {
|
|
deprecatedCallback = contextOptions;
|
|
contextOptions = undefined;
|
|
}
|
|
const context = this._getHelpContext(contextOptions);
|
|
|
|
this._getCommandAndAncestors()
|
|
.reverse()
|
|
.forEach((command) => command.emit('beforeAllHelp', context));
|
|
this.emit('beforeHelp', context);
|
|
|
|
let helpInformation = this.helpInformation(context);
|
|
if (deprecatedCallback) {
|
|
helpInformation = deprecatedCallback(helpInformation);
|
|
if (
|
|
typeof helpInformation !== 'string' &&
|
|
!Buffer.isBuffer(helpInformation)
|
|
) {
|
|
throw new Error('outputHelp callback must return a string or a Buffer');
|
|
}
|
|
}
|
|
context.write(helpInformation);
|
|
|
|
if (this._getHelpOption()?.long) {
|
|
this.emit(this._getHelpOption().long); // deprecated
|
|
}
|
|
this.emit('afterHelp', context);
|
|
this._getCommandAndAncestors().forEach((command) =>
|
|
command.emit('afterAllHelp', context),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* You can pass in flags and a description to customise the built-in help option.
|
|
* Pass in false to disable the built-in help option.
|
|
*
|
|
* @example
|
|
* program.helpOption('-?, --help' 'show help'); // customise
|
|
* program.helpOption(false); // disable
|
|
*
|
|
* @param {(string | boolean)} flags
|
|
* @param {string} [description]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
helpOption(flags, description) {
|
|
// Support disabling built-in help option.
|
|
if (typeof flags === 'boolean') {
|
|
if (flags) {
|
|
this._helpOption = this._helpOption ?? undefined; // preserve existing option
|
|
} else {
|
|
this._helpOption = null; // disable
|
|
}
|
|
return this;
|
|
}
|
|
|
|
// Customise flags and description.
|
|
flags = flags ?? '-h, --help';
|
|
description = description ?? 'display help for command';
|
|
this._helpOption = this.createOption(flags, description);
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Lazy create help option.
|
|
* Returns null if has been disabled with .helpOption(false).
|
|
*
|
|
* @returns {(Option | null)} the help option
|
|
* @package
|
|
*/
|
|
_getHelpOption() {
|
|
// Lazy create help option on demand.
|
|
if (this._helpOption === undefined) {
|
|
this.helpOption(undefined, undefined);
|
|
}
|
|
return this._helpOption;
|
|
}
|
|
|
|
/**
|
|
* Supply your own option to use for the built-in help option.
|
|
* This is an alternative to using helpOption() to customise the flags and description etc.
|
|
*
|
|
* @param {Option} option
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
addHelpOption(option) {
|
|
this._helpOption = option;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Output help information and exit.
|
|
*
|
|
* Outputs built-in help, and custom text added using `.addHelpText()`.
|
|
*
|
|
* @param {{ error: boolean }} [contextOptions] - pass {error:true} to write to stderr instead of stdout
|
|
*/
|
|
|
|
help(contextOptions) {
|
|
this.outputHelp(contextOptions);
|
|
let exitCode = process.exitCode || 0;
|
|
if (
|
|
exitCode === 0 &&
|
|
contextOptions &&
|
|
typeof contextOptions !== 'function' &&
|
|
contextOptions.error
|
|
) {
|
|
exitCode = 1;
|
|
}
|
|
// message: do not have all displayed text available so only passing placeholder.
|
|
this._exit(exitCode, 'commander.help', '(outputHelp)');
|
|
}
|
|
|
|
/**
|
|
* Add additional text to be displayed with the built-in help.
|
|
*
|
|
* Position is 'before' or 'after' to affect just this command,
|
|
* and 'beforeAll' or 'afterAll' to affect this command and all its subcommands.
|
|
*
|
|
* @param {string} position - before or after built-in help
|
|
* @param {(string | Function)} text - string to add, or a function returning a string
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
addHelpText(position, text) {
|
|
const allowedValues = ['beforeAll', 'before', 'after', 'afterAll'];
|
|
if (!allowedValues.includes(position)) {
|
|
throw new Error(`Unexpected value for position to addHelpText.
|
|
Expecting one of '${allowedValues.join("', '")}'`);
|
|
}
|
|
const helpEvent = `${position}Help`;
|
|
this.on(helpEvent, (context) => {
|
|
let helpStr;
|
|
if (typeof text === 'function') {
|
|
helpStr = text({ error: context.error, command: context.command });
|
|
} else {
|
|
helpStr = text;
|
|
}
|
|
// Ignore falsy value when nothing to output.
|
|
if (helpStr) {
|
|
context.write(`${helpStr}\n`);
|
|
}
|
|
});
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Output help information if help flags specified
|
|
*
|
|
* @param {Array} args - array of options to search for help flags
|
|
* @private
|
|
*/
|
|
|
|
_outputHelpIfRequested(args) {
|
|
const helpOption = this._getHelpOption();
|
|
const helpRequested = helpOption && args.find((arg) => helpOption.is(arg));
|
|
if (helpRequested) {
|
|
this.outputHelp();
|
|
// (Do not have all displayed text available so only passing placeholder.)
|
|
this._exit(0, 'commander.helpDisplayed', '(outputHelp)');
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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[]}
|
|
* @private
|
|
*/
|
|
|
|
function incrementNodeInspectorPort(args) {
|
|
// Testing for these options:
|
|
// --inspect[=[host:]port]
|
|
// --inspect-brk[=[host:]port]
|
|
// --inspect-port=[host:]port
|
|
return args.map((arg) => {
|
|
if (!arg.startsWith('--inspect')) {
|
|
return arg;
|
|
}
|
|
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') {
|
|
return `${debugOption}=${debugHost}:${parseInt(debugPort) + 1}`;
|
|
}
|
|
return arg;
|
|
});
|
|
}
|
|
|
|
exports.Command = Command;
|