2218 lines
66 KiB
JavaScript
Executable file
2218 lines
66 KiB
JavaScript
Executable file
/**
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* Module dependencies.
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*/
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const EventEmitter = require('events').EventEmitter;
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const childProcess = require('child_process');
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const path = require('path');
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const fs = require('fs');
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// @ts-check
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// Although this is a class, methods are static in style to allow override using subclass or just functions.
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class Help {
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constructor() {
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this.helpWidth = undefined;
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this.sortSubcommands = false;
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this.sortOptions = false;
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}
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/**
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* Get an array of the visible subcommands. Includes a placeholder for the implicit help command, if there is one.
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*
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* @param {Command} cmd
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* @returns {Command[]}
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*/
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visibleCommands(cmd) {
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const visibleCommands = cmd.commands.filter(cmd => !cmd._hidden);
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if (cmd._hasImplicitHelpCommand()) {
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// Create a command matching the implicit help command.
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const args = cmd._helpCommandnameAndArgs.split(/ +/);
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const helpCommand = cmd.createCommand(args.shift())
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.helpOption(false);
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helpCommand.description(cmd._helpCommandDescription);
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helpCommand._parseExpectedArgs(args);
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visibleCommands.push(helpCommand);
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}
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if (this.sortSubcommands) {
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visibleCommands.sort((a, b) => {
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return a.name().localeCompare(b.name());
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});
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}
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return visibleCommands;
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}
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/**
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* Get an array of the visible options. Includes a placeholder for the implicit help option, if there is one.
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*
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* @param {Command} cmd
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* @returns {Option[]}
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*/
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visibleOptions(cmd) {
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const visibleOptions = cmd.options.filter((option) => !option.hidden);
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// Implicit help
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const showShortHelpFlag = cmd._hasHelpOption && cmd._helpShortFlag && !cmd._findOption(cmd._helpShortFlag);
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const showLongHelpFlag = cmd._hasHelpOption && !cmd._findOption(cmd._helpLongFlag);
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if (showShortHelpFlag || showLongHelpFlag) {
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let helpOption;
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if (!showShortHelpFlag) {
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helpOption = cmd.createOption(cmd._helpLongFlag, cmd._helpDescription);
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} else if (!showLongHelpFlag) {
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helpOption = cmd.createOption(cmd._helpShortFlag, cmd._helpDescription);
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} else {
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helpOption = cmd.createOption(cmd._helpFlags, cmd._helpDescription);
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}
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visibleOptions.push(helpOption);
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}
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if (this.sortOptions) {
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const getSortKey = (option) => {
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// WYSIWYG for order displayed in help with short before long, no special handling for negated.
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return option.short ? option.short.replace(/^-/, '') : option.long.replace(/^--/, '');
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};
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visibleOptions.sort((a, b) => {
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return getSortKey(a).localeCompare(getSortKey(b));
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});
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}
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return visibleOptions;
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}
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/**
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* Get an array of the arguments which have descriptions.
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*
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* @param {Command} cmd
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* @returns {{ term: string, description:string }[]}
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*/
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visibleArguments(cmd) {
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if (cmd._argsDescription && cmd._args.length) {
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return cmd._args.map((argument) => {
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return { term: argument.name, description: cmd._argsDescription[argument.name] || '' };
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}, 0);
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}
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return [];
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}
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/**
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* Get the command term to show in the list of subcommands.
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*
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* @param {Command} cmd
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* @returns {string}
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*/
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subcommandTerm(cmd) {
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// Legacy. Ignores custom usage string, and nested commands.
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const args = cmd._args.map(arg => humanReadableArgName(arg)).join(' ');
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return cmd._name +
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(cmd._aliases[0] ? '|' + cmd._aliases[0] : '') +
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(cmd.options.length ? ' [options]' : '') + // simplistic check for non-help option
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(args ? ' ' + args : '');
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}
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/**
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* Get the option term to show in the list of options.
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*
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* @param {Option} option
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* @returns {string}
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*/
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optionTerm(option) {
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return option.flags;
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}
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/**
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* Get the longest command term length.
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*
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* @param {Command} cmd
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* @param {Help} helper
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* @returns {number}
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*/
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longestSubcommandTermLength(cmd, helper) {
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return helper.visibleCommands(cmd).reduce((max, command) => {
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return Math.max(max, helper.subcommandTerm(command).length);
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}, 0);
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};
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/**
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* Get the longest option term length.
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*
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* @param {Command} cmd
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* @param {Help} helper
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* @returns {number}
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*/
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longestOptionTermLength(cmd, helper) {
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return helper.visibleOptions(cmd).reduce((max, option) => {
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return Math.max(max, helper.optionTerm(option).length);
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}, 0);
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};
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/**
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* Get the longest argument term length.
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*
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* @param {Command} cmd
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* @param {Help} helper
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* @returns {number}
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*/
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longestArgumentTermLength(cmd, helper) {
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return helper.visibleArguments(cmd).reduce((max, argument) => {
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return Math.max(max, argument.term.length);
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}, 0);
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};
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/**
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* Get the command usage to be displayed at the top of the built-in help.
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*
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* @param {Command} cmd
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* @returns {string}
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*/
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commandUsage(cmd) {
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// Usage
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let cmdName = cmd._name;
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if (cmd._aliases[0]) {
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cmdName = cmdName + '|' + cmd._aliases[0];
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}
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let parentCmdNames = '';
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for (let parentCmd = cmd.parent; parentCmd; parentCmd = parentCmd.parent) {
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parentCmdNames = parentCmd.name() + ' ' + parentCmdNames;
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}
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return parentCmdNames + cmdName + ' ' + cmd.usage();
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}
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/**
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* Get the description for the command.
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*
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* @param {Command} cmd
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* @returns {string}
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*/
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commandDescription(cmd) {
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// @ts-ignore: overloaded return type
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return cmd.description();
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}
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/**
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* Get the command description to show in the list of subcommands.
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*
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* @param {Command} cmd
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* @returns {string}
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*/
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subcommandDescription(cmd) {
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// @ts-ignore: overloaded return type
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return cmd.description();
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}
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/**
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* Get the option description to show in the list of options.
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*
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* @param {Option} option
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* @return {string}
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*/
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optionDescription(option) {
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if (option.negate) {
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return option.description;
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}
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const extraInfo = [];
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if (option.argChoices) {
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extraInfo.push(
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// use stringify to match the display of the default value
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`choices: ${option.argChoices.map((choice) => JSON.stringify(choice)).join(', ')}`);
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}
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if (option.defaultValue !== undefined) {
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extraInfo.push(`default: ${option.defaultValueDescription || JSON.stringify(option.defaultValue)}`);
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}
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if (extraInfo.length > 0) {
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return `${option.description} (${extraInfo.join(', ')})`;
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}
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return option.description;
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};
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/**
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* Generate the built-in help text.
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*
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* @param {Command} cmd
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* @param {Help} helper
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* @returns {string}
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*/
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formatHelp(cmd, helper) {
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const termWidth = helper.padWidth(cmd, helper);
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const helpWidth = helper.helpWidth || 80;
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const itemIndentWidth = 2;
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const itemSeparatorWidth = 2; // between term and description
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function formatItem(term, description) {
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if (description) {
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const fullText = `${term.padEnd(termWidth + itemSeparatorWidth)}${description}`;
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return helper.wrap(fullText, helpWidth - itemIndentWidth, termWidth + itemSeparatorWidth);
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}
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return term;
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};
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function formatList(textArray) {
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return textArray.join('\n').replace(/^/gm, ' '.repeat(itemIndentWidth));
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}
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// Usage
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let output = [`Usage: ${helper.commandUsage(cmd)}`, ''];
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// Description
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const commandDescription = helper.commandDescription(cmd);
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if (commandDescription.length > 0) {
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output = output.concat([commandDescription, '']);
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}
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// Arguments
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const argumentList = helper.visibleArguments(cmd).map((argument) => {
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return formatItem(argument.term, argument.description);
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});
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if (argumentList.length > 0) {
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output = output.concat(['Arguments:', formatList(argumentList), '']);
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}
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// Options
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const optionList = helper.visibleOptions(cmd).map((option) => {
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return formatItem(helper.optionTerm(option), helper.optionDescription(option));
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});
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if (optionList.length > 0) {
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output = output.concat(['Options:', formatList(optionList), '']);
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}
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// Commands
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const commandList = helper.visibleCommands(cmd).map((cmd) => {
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return formatItem(helper.subcommandTerm(cmd), helper.subcommandDescription(cmd));
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});
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if (commandList.length > 0) {
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output = output.concat(['Commands:', formatList(commandList), '']);
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}
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return output.join('\n');
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}
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/**
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* Calculate the pad width from the maximum term length.
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*
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* @param {Command} cmd
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* @param {Help} helper
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* @returns {number}
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*/
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padWidth(cmd, helper) {
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return Math.max(
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helper.longestOptionTermLength(cmd, helper),
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helper.longestSubcommandTermLength(cmd, helper),
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helper.longestArgumentTermLength(cmd, helper)
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);
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};
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/**
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* Wrap the given string to width characters per line, with lines after the first indented.
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* Do not wrap if insufficient room for wrapping (minColumnWidth), or string is manually formatted.
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*
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* @param {string} str
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* @param {number} width
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* @param {number} indent
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* @param {number} [minColumnWidth=40]
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* @return {string}
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*
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*/
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wrap(str, width, indent, minColumnWidth = 40) {
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// Detect manually wrapped and indented strings by searching for line breaks
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// followed by multiple spaces/tabs.
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if (str.match(/[\n]\s+/)) return str;
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// Do not wrap if not enough room for a wrapped column of text (as could end up with a word per line).
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const columnWidth = width - indent;
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if (columnWidth < minColumnWidth) return str;
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const leadingStr = str.substr(0, indent);
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const columnText = str.substr(indent);
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const indentString = ' '.repeat(indent);
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const regex = new RegExp('.{1,' + (columnWidth - 1) + '}([\\s\u200B]|$)|[^\\s\u200B]+?([\\s\u200B]|$)', 'g');
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const lines = columnText.match(regex) || [];
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return leadingStr + lines.map((line, i) => {
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if (line.slice(-1) === '\n') {
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line = line.slice(0, line.length - 1);
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}
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return ((i > 0) ? indentString : '') + line.trimRight();
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}).join('\n');
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}
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}
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class Option {
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/**
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* Initialize a new `Option` with the given `flags` and `description`.
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*
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* @param {string} flags
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* @param {string} [description]
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*/
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constructor(flags, description) {
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this.flags = flags;
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this.description = description || '';
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this.required = flags.includes('<'); // A value must be supplied when the option is specified.
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this.optional = flags.includes('['); // A value is optional when the option is specified.
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// variadic test ignores <value,...> et al which might be used to describe custom splitting of single argument
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this.variadic = /\w\.\.\.[>\]]$/.test(flags); // The option can take multiple values.
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this.mandatory = false; // The option must have a value after parsing, which usually means it must be specified on command line.
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const optionFlags = _parseOptionFlags(flags);
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this.short = optionFlags.shortFlag;
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this.long = optionFlags.longFlag;
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this.negate = false;
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if (this.long) {
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this.negate = this.long.startsWith('--no-');
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}
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this.defaultValue = undefined;
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this.defaultValueDescription = undefined;
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this.parseArg = undefined;
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this.hidden = false;
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this.argChoices = undefined;
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}
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/**
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* Set the default value, and optionally supply the description to be displayed in the help.
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*
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* @param {any} value
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* @param {string} [description]
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* @return {Option}
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*/
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default(value, description) {
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this.defaultValue = value;
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this.defaultValueDescription = description;
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return this;
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};
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/**
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* Set the custom handler for processing CLI option arguments into option values.
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*
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* @param {Function} [fn]
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* @return {Option}
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*/
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argParser(fn) {
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this.parseArg = fn;
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return this;
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};
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/**
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* Whether the option is mandatory and must have a value after parsing.
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*
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* @param {boolean} [mandatory=true]
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* @return {Option}
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*/
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makeOptionMandatory(mandatory = true) {
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this.mandatory = !!mandatory;
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return this;
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};
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/**
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* Hide option in help.
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*
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* @param {boolean} [hide=true]
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* @return {Option}
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*/
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hideHelp(hide = true) {
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this.hidden = !!hide;
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return this;
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};
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/**
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* @api private
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*/
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_concatValue(value, previous) {
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if (previous === this.defaultValue || !Array.isArray(previous)) {
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return [value];
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}
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return previous.concat(value);
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}
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/**
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* Only allow option value to be one of choices.
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*
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* @param {string[]} values
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* @return {Option}
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*/
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choices(values) {
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this.argChoices = values;
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this.parseArg = (arg, previous) => {
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if (!values.includes(arg)) {
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throw new InvalidOptionArgumentError(`Allowed choices are ${values.join(', ')}.`);
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}
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if (this.variadic) {
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return this._concatValue(arg, previous);
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}
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return arg;
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};
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return this;
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};
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/**
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* Return option name.
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*
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* @return {string}
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*/
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name() {
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if (this.long) {
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return this.long.replace(/^--/, '');
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}
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return this.short.replace(/^-/, '');
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};
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/**
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* Return option name, in a camelcase format that can be used
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* as a object attribute key.
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*
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* @return {string}
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* @api private
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*/
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attributeName() {
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return camelcase(this.name().replace(/^no-/, ''));
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};
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/**
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* Check if `arg` matches the short or long flag.
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*
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* @param {string} arg
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* @return {boolean}
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* @api private
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*/
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is(arg) {
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return this.short === arg || this.long === arg;
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};
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}
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|
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/**
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* CommanderError class
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* @class
|
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*/
|
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class CommanderError extends Error {
|
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/**
|
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* Constructs the CommanderError class
|
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* @param {number} exitCode suggested exit code which could be used with process.exit
|
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* @param {string} code an id string representing the error
|
|
* @param {string} message human-readable description of the error
|
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* @constructor
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*/
|
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constructor(exitCode, code, message) {
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super(message);
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// properly capture stack trace in Node.js
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Error.captureStackTrace(this, this.constructor);
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this.name = this.constructor.name;
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this.code = code;
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this.exitCode = exitCode;
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this.nestedError = undefined;
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}
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}
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|
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/**
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* InvalidOptionArgumentError class
|
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* @class
|
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*/
|
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class InvalidOptionArgumentError extends CommanderError {
|
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/**
|
|
* Constructs the InvalidOptionArgumentError class
|
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* @param {string} [message] explanation of why argument is invalid
|
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* @constructor
|
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*/
|
|
constructor(message) {
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super(1, 'commander.invalidOptionArgument', message);
|
|
// properly capture stack trace in Node.js
|
|
Error.captureStackTrace(this, this.constructor);
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this.name = this.constructor.name;
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}
|
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}
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|
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class Command extends EventEmitter {
|
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/**
|
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* Initialize a new `Command`.
|
|
*
|
|
* @param {string} [name]
|
|
*/
|
|
|
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constructor(name) {
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super();
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this.commands = [];
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this.options = [];
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this.parent = null;
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this._allowUnknownOption = false;
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this._allowExcessArguments = true;
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this._args = [];
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this.rawArgs = null;
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this._scriptPath = null;
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this._name = name || '';
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this._optionValues = {};
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this._storeOptionsAsProperties = false;
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this._actionResults = [];
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this._actionHandler = null;
|
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this._executableHandler = false;
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this._executableFile = null; // custom name for executable
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this._defaultCommandName = null;
|
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this._exitCallback = null;
|
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this._aliases = [];
|
|
this._combineFlagAndOptionalValue = true;
|
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this._description = '';
|
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this._argsDescription = undefined;
|
|
this._enablePositionalOptions = false;
|
|
this._passThroughOptions = false;
|
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|
|
// see .configureOutput() for docs
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|
this._outputConfiguration = {
|
|
writeOut: (str) => process.stdout.write(str),
|
|
writeErr: (str) => process.stderr.write(str),
|
|
getOutHelpWidth: () => process.stdout.isTTY ? process.stdout.columns : undefined,
|
|
getErrHelpWidth: () => process.stderr.isTTY ? process.stderr.columns : undefined,
|
|
outputError: (str, write) => write(str)
|
|
};
|
|
|
|
this._hidden = false;
|
|
this._hasHelpOption = true;
|
|
this._helpFlags = '-h, --help';
|
|
this._helpDescription = 'display help for command';
|
|
this._helpShortFlag = '-h';
|
|
this._helpLongFlag = '--help';
|
|
this._addImplicitHelpCommand = undefined; // Deliberately undefined, not decided whether true or false
|
|
this._helpCommandName = 'help';
|
|
this._helpCommandnameAndArgs = 'help [command]';
|
|
this._helpCommandDescription = 'display help for command';
|
|
this._helpConfiguration = {};
|
|
}
|
|
|
|
/**
|
|
* Define a command.
|
|
*
|
|
* There are two styles of command: pay attention to where to put the description.
|
|
*
|
|
* Examples:
|
|
*
|
|
* // Command implemented using action handler (description is supplied separately to `.command`)
|
|
* program
|
|
* .command('clone <source> [destination]')
|
|
* .description('clone a repository into a newly created directory')
|
|
* .action((source, destination) => {
|
|
* console.log('clone command called');
|
|
* });
|
|
*
|
|
* // Command implemented using separate executable file (description is second parameter to `.command`)
|
|
* program
|
|
* .command('start <service>', 'start named service')
|
|
* .command('stop [service]', 'stop named service, or all if no name supplied');
|
|
*
|
|
* @param {string} nameAndArgs - command name and arguments, args are `<required>` or `[optional]` and last may also be `variadic...`
|
|
* @param {Object|string} [actionOptsOrExecDesc] - configuration options (for action), or description (for executable)
|
|
* @param {Object} [execOpts] - configuration options (for executable)
|
|
* @return {Command} returns new command for action handler, or `this` for executable command
|
|
*/
|
|
|
|
command(nameAndArgs, actionOptsOrExecDesc, execOpts) {
|
|
let desc = actionOptsOrExecDesc;
|
|
let opts = execOpts;
|
|
if (typeof desc === 'object' && desc !== null) {
|
|
opts = desc;
|
|
desc = null;
|
|
}
|
|
opts = opts || {};
|
|
const args = nameAndArgs.split(/ +/);
|
|
const cmd = this.createCommand(args.shift());
|
|
|
|
if (desc) {
|
|
cmd.description(desc);
|
|
cmd._executableHandler = true;
|
|
}
|
|
if (opts.isDefault) this._defaultCommandName = cmd._name;
|
|
|
|
cmd._outputConfiguration = this._outputConfiguration;
|
|
|
|
cmd._hidden = !!(opts.noHelp || opts.hidden); // noHelp is deprecated old name for hidden
|
|
cmd._hasHelpOption = this._hasHelpOption;
|
|
cmd._helpFlags = this._helpFlags;
|
|
cmd._helpDescription = this._helpDescription;
|
|
cmd._helpShortFlag = this._helpShortFlag;
|
|
cmd._helpLongFlag = this._helpLongFlag;
|
|
cmd._helpCommandName = this._helpCommandName;
|
|
cmd._helpCommandnameAndArgs = this._helpCommandnameAndArgs;
|
|
cmd._helpCommandDescription = this._helpCommandDescription;
|
|
cmd._helpConfiguration = this._helpConfiguration;
|
|
cmd._exitCallback = this._exitCallback;
|
|
cmd._storeOptionsAsProperties = this._storeOptionsAsProperties;
|
|
cmd._combineFlagAndOptionalValue = this._combineFlagAndOptionalValue;
|
|
cmd._allowExcessArguments = this._allowExcessArguments;
|
|
cmd._enablePositionalOptions = this._enablePositionalOptions;
|
|
|
|
cmd._executableFile = opts.executableFile || null; // Custom name for executable file, set missing to null to match constructor
|
|
this.commands.push(cmd);
|
|
cmd._parseExpectedArgs(args);
|
|
cmd.parent = this;
|
|
|
|
if (desc) return this;
|
|
return cmd;
|
|
};
|
|
|
|
/**
|
|
* Factory routine to create a new unattached command.
|
|
*
|
|
* See .command() for creating an attached subcommand, which uses this routine to
|
|
* create the command. You can override createCommand to customise subcommands.
|
|
*
|
|
* @param {string} [name]
|
|
* @return {Command} new command
|
|
*/
|
|
|
|
createCommand(name) {
|
|
return new Command(name);
|
|
};
|
|
|
|
/**
|
|
* You can customise the help with a subclass of Help by overriding createHelp,
|
|
* or by overriding Help properties using configureHelp().
|
|
*
|
|
* @return {Help}
|
|
*/
|
|
|
|
createHelp() {
|
|
return Object.assign(new Help(), this.configureHelp());
|
|
};
|
|
|
|
/**
|
|
* You can customise the help by overriding Help properties using configureHelp(),
|
|
* or with a subclass of Help by overriding createHelp().
|
|
*
|
|
* @param {Object} [configuration] - configuration options
|
|
* @return {Command|Object} `this` command for chaining, or stored configuration
|
|
*/
|
|
|
|
configureHelp(configuration) {
|
|
if (configuration === undefined) return this._helpConfiguration;
|
|
|
|
this._helpConfiguration = configuration;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* The default output goes to stdout and stderr. You can customise this for special
|
|
* applications. You can also customise the display of errors by overriding outputError.
|
|
*
|
|
* The configuration properties are all functions:
|
|
*
|
|
* // functions to change where being written, stdout and stderr
|
|
* writeOut(str)
|
|
* writeErr(str)
|
|
* // matching functions to specify width for wrapping help
|
|
* getOutHelpWidth()
|
|
* getErrHelpWidth()
|
|
* // functions based on what is being written out
|
|
* outputError(str, write) // used for displaying errors, and not used for displaying help
|
|
*
|
|
* @param {Object} [configuration] - configuration options
|
|
* @return {Command|Object} `this` command for chaining, or stored configuration
|
|
*/
|
|
|
|
configureOutput(configuration) {
|
|
if (configuration === undefined) return this._outputConfiguration;
|
|
|
|
Object.assign(this._outputConfiguration, configuration);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Add a prepared subcommand.
|
|
*
|
|
* See .command() for creating an attached subcommand which inherits settings from its parent.
|
|
*
|
|
* @param {Command} cmd - new subcommand
|
|
* @param {Object} [opts] - configuration options
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
addCommand(cmd, opts) {
|
|
if (!cmd._name) throw new Error('Command passed to .addCommand() must have a name');
|
|
|
|
// To keep things simple, block automatic name generation for deeply nested executables.
|
|
// Fail fast and detect when adding rather than later when parsing.
|
|
function checkExplicitNames(commandArray) {
|
|
commandArray.forEach((cmd) => {
|
|
if (cmd._executableHandler && !cmd._executableFile) {
|
|
throw new Error(`Must specify executableFile for deeply nested executable: ${cmd.name()}`);
|
|
}
|
|
checkExplicitNames(cmd.commands);
|
|
});
|
|
}
|
|
checkExplicitNames(cmd.commands);
|
|
|
|
opts = opts || {};
|
|
if (opts.isDefault) this._defaultCommandName = cmd._name;
|
|
if (opts.noHelp || opts.hidden) cmd._hidden = true; // modifying passed command due to existing implementation
|
|
|
|
this.commands.push(cmd);
|
|
cmd.parent = this;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Define argument syntax for the command.
|
|
*/
|
|
|
|
arguments(desc) {
|
|
return this._parseExpectedArgs(desc.split(/ +/));
|
|
};
|
|
|
|
/**
|
|
* Override default decision whether to add implicit help command.
|
|
*
|
|
* addHelpCommand() // force on
|
|
* addHelpCommand(false); // force off
|
|
* addHelpCommand('help [cmd]', 'display help for [cmd]'); // force on with custom details
|
|
*
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
addHelpCommand(enableOrNameAndArgs, description) {
|
|
if (enableOrNameAndArgs === false) {
|
|
this._addImplicitHelpCommand = false;
|
|
} else {
|
|
this._addImplicitHelpCommand = true;
|
|
if (typeof enableOrNameAndArgs === 'string') {
|
|
this._helpCommandName = enableOrNameAndArgs.split(' ')[0];
|
|
this._helpCommandnameAndArgs = enableOrNameAndArgs;
|
|
}
|
|
this._helpCommandDescription = description || this._helpCommandDescription;
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* @return {boolean}
|
|
* @api private
|
|
*/
|
|
|
|
_hasImplicitHelpCommand() {
|
|
if (this._addImplicitHelpCommand === undefined) {
|
|
return this.commands.length && !this._actionHandler && !this._findCommand('help');
|
|
}
|
|
return this._addImplicitHelpCommand;
|
|
};
|
|
|
|
/**
|
|
* Parse expected `args`.
|
|
*
|
|
* For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`.
|
|
*
|
|
* @param {Array} args
|
|
* @return {Command} `this` command for chaining
|
|
* @api private
|
|
*/
|
|
|
|
_parseExpectedArgs(args) {
|
|
if (!args.length) return;
|
|
args.forEach((arg) => {
|
|
const argDetails = {
|
|
required: false,
|
|
name: '',
|
|
variadic: false
|
|
};
|
|
|
|
switch (arg[0]) {
|
|
case '<':
|
|
argDetails.required = true;
|
|
argDetails.name = arg.slice(1, -1);
|
|
break;
|
|
case '[':
|
|
argDetails.name = arg.slice(1, -1);
|
|
break;
|
|
}
|
|
|
|
if (argDetails.name.length > 3 && argDetails.name.slice(-3) === '...') {
|
|
argDetails.variadic = true;
|
|
argDetails.name = argDetails.name.slice(0, -3);
|
|
}
|
|
if (argDetails.name) {
|
|
this._args.push(argDetails);
|
|
}
|
|
});
|
|
this._args.forEach((arg, i) => {
|
|
if (arg.variadic && i < this._args.length - 1) {
|
|
throw new Error(`only the last argument can be variadic '${arg.name}'`);
|
|
}
|
|
});
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Register callback to use as replacement for calling process.exit.
|
|
*
|
|
* @param {Function} [fn] optional callback which will be passed a CommanderError, defaults to throwing
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
exitOverride(fn) {
|
|
if (fn) {
|
|
this._exitCallback = fn;
|
|
} else {
|
|
this._exitCallback = (err) => {
|
|
if (err.code !== 'commander.executeSubCommandAsync') {
|
|
throw err;
|
|
} else {
|
|
// Async callback from spawn events, not useful to throw.
|
|
}
|
|
};
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Call process.exit, and _exitCallback if defined.
|
|
*
|
|
* @param {number} exitCode exit code for using with process.exit
|
|
* @param {string} code an id string representing the error
|
|
* @param {string} message human-readable description of the error
|
|
* @return never
|
|
* @api private
|
|
*/
|
|
|
|
_exit(exitCode, code, message) {
|
|
if (this._exitCallback) {
|
|
this._exitCallback(new CommanderError(exitCode, code, message));
|
|
// Expecting this line is not reached.
|
|
}
|
|
process.exit(exitCode);
|
|
};
|
|
|
|
/**
|
|
* Register callback `fn` for the command.
|
|
*
|
|
* Examples:
|
|
*
|
|
* program
|
|
* .command('help')
|
|
* .description('display verbose help')
|
|
* .action(function() {
|
|
* // output help here
|
|
* });
|
|
*
|
|
* @param {Function} fn
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
action(fn) {
|
|
const listener = (args) => {
|
|
// The .action callback takes an extra parameter which is the command or options.
|
|
const expectedArgsCount = this._args.length;
|
|
const actionArgs = args.slice(0, expectedArgsCount);
|
|
if (this._storeOptionsAsProperties) {
|
|
actionArgs[expectedArgsCount] = this; // backwards compatible "options"
|
|
} else {
|
|
actionArgs[expectedArgsCount] = this.opts();
|
|
}
|
|
actionArgs.push(this);
|
|
|
|
const actionResult = fn.apply(this, actionArgs);
|
|
// Remember result in case it is async. Assume parseAsync getting called on root.
|
|
let rootCommand = this;
|
|
while (rootCommand.parent) {
|
|
rootCommand = rootCommand.parent;
|
|
}
|
|
rootCommand._actionResults.push(actionResult);
|
|
};
|
|
this._actionHandler = listener;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* 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);
|
|
};
|
|
|
|
/**
|
|
* Add an option.
|
|
*
|
|
* @param {Option} option
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
addOption(option) {
|
|
const oname = option.name();
|
|
const name = option.attributeName();
|
|
|
|
let defaultValue = option.defaultValue;
|
|
|
|
// preassign default value for --no-*, [optional], <required>, or plain flag if boolean value
|
|
if (option.negate || option.optional || option.required || typeof defaultValue === 'boolean') {
|
|
// when --no-foo we make sure default is true, unless a --foo option is already defined
|
|
if (option.negate) {
|
|
const positiveLongFlag = option.long.replace(/^--no-/, '--');
|
|
defaultValue = this._findOption(positiveLongFlag) ? this._getOptionValue(name) : true;
|
|
}
|
|
// preassign only if we have a default
|
|
if (defaultValue !== undefined) {
|
|
this._setOptionValue(name, defaultValue);
|
|
}
|
|
}
|
|
|
|
// register the option
|
|
this.options.push(option);
|
|
|
|
// when it's passed assign the value
|
|
// and conditionally invoke the callback
|
|
this.on('option:' + oname, (val) => {
|
|
const oldValue = this._getOptionValue(name);
|
|
|
|
// custom processing
|
|
if (val !== null && option.parseArg) {
|
|
try {
|
|
val = option.parseArg(val, oldValue === undefined ? defaultValue : oldValue);
|
|
} catch (err) {
|
|
if (err.code === 'commander.invalidOptionArgument') {
|
|
const message = `error: option '${option.flags}' argument '${val}' is invalid. ${err.message}`;
|
|
this._displayError(err.exitCode, err.code, message);
|
|
}
|
|
throw err;
|
|
}
|
|
} else if (val !== null && option.variadic) {
|
|
val = option._concatValue(val, oldValue);
|
|
}
|
|
|
|
// unassigned or boolean value
|
|
if (typeof oldValue === 'boolean' || typeof oldValue === 'undefined') {
|
|
// if no value, negate false, and we have a default, then use it!
|
|
if (val == null) {
|
|
this._setOptionValue(name, option.negate
|
|
? false
|
|
: defaultValue || true);
|
|
} else {
|
|
this._setOptionValue(name, val);
|
|
}
|
|
} else if (val !== null) {
|
|
// reassign
|
|
this._setOptionValue(name, option.negate ? false : val);
|
|
}
|
|
});
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Internal implementation shared by .option() and .requiredOption()
|
|
*
|
|
* @api private
|
|
*/
|
|
_optionEx(config, flags, description, fn, defaultValue) {
|
|
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
|
|
* coercion `fn`.
|
|
*
|
|
* The `flags` string contains the short and/or long flags,
|
|
* separated by comma, a pipe or space. The following are all valid
|
|
* all will output this way when `--help` is used.
|
|
*
|
|
* "-p, --pepper"
|
|
* "-p|--pepper"
|
|
* "-p --pepper"
|
|
*
|
|
* Examples:
|
|
*
|
|
* // simple boolean defaulting to undefined
|
|
* program.option('-p, --pepper', 'add pepper');
|
|
*
|
|
* program.pepper
|
|
* // => undefined
|
|
*
|
|
* --pepper
|
|
* program.pepper
|
|
* // => true
|
|
*
|
|
* // simple boolean defaulting to true (unless non-negated option is also defined)
|
|
* program.option('-C, --no-cheese', 'remove cheese');
|
|
*
|
|
* program.cheese
|
|
* // => true
|
|
*
|
|
* --no-cheese
|
|
* program.cheese
|
|
* // => false
|
|
*
|
|
* // required argument
|
|
* program.option('-C, --chdir <path>', 'change the working directory');
|
|
*
|
|
* --chdir /tmp
|
|
* program.chdir
|
|
* // => "/tmp"
|
|
*
|
|
* // optional argument
|
|
* program.option('-c, --cheese [type]', 'add cheese [marble]');
|
|
*
|
|
* @param {string} flags
|
|
* @param {string} [description]
|
|
* @param {Function|*} [fn] - custom option processing function or default value
|
|
* @param {*} [defaultValue]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
option(flags, description, fn, defaultValue) {
|
|
return this._optionEx({}, flags, description, fn, defaultValue);
|
|
};
|
|
|
|
/**
|
|
* Add a required option which must have a value after parsing. This usually means
|
|
* the option must be specified on the command line. (Otherwise the same as .option().)
|
|
*
|
|
* The `flags` string contains the short and/or long flags, separated by comma, a pipe or space.
|
|
*
|
|
* @param {string} flags
|
|
* @param {string} [description]
|
|
* @param {Function|*} [fn] - custom option processing function or default value
|
|
* @param {*} [defaultValue]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
requiredOption(flags, description, fn, defaultValue) {
|
|
return this._optionEx({ mandatory: true }, flags, description, fn, defaultValue);
|
|
};
|
|
|
|
/**
|
|
* Alter parsing of short flags with optional values.
|
|
*
|
|
* Examples:
|
|
*
|
|
* // for `.option('-f,--flag [value]'):
|
|
* .combineFlagAndOptionalValue(true) // `-f80` is treated like `--flag=80`, this is the default behaviour
|
|
* .combineFlagAndOptionalValue(false) // `-fb` is treated like `-f -b`
|
|
*
|
|
* @param {Boolean} [combine=true] - if `true` or omitted, an optional value can be specified directly after the flag.
|
|
*/
|
|
combineFlagAndOptionalValue(combine = true) {
|
|
this._combineFlagAndOptionalValue = !!combine;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Allow unknown options on the command line.
|
|
*
|
|
* @param {Boolean} [allowUnknown=true] - if `true` or omitted, no error will be thrown
|
|
* for unknown options.
|
|
*/
|
|
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=true] - if `true` or omitted, no error will be thrown
|
|
* for excess arguments.
|
|
*/
|
|
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=true]
|
|
*/
|
|
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=true]
|
|
* for unknown options.
|
|
*/
|
|
passThroughOptions(passThrough = true) {
|
|
this._passThroughOptions = !!passThrough;
|
|
if (!!this.parent && passThrough && !this.parent._enablePositionalOptions) {
|
|
throw new Error('passThroughOptions can not be used without turning on enablePositionalOptions for parent command(s)');
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Whether to store option values as properties on command object,
|
|
* or store separately (specify false). In both cases the option values can be accessed using .opts().
|
|
*
|
|
* @param {boolean} [storeAsProperties=true]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
storeOptionsAsProperties(storeAsProperties = true) {
|
|
this._storeOptionsAsProperties = !!storeAsProperties;
|
|
if (this.options.length) {
|
|
throw new Error('call .storeOptionsAsProperties() before adding options');
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Store option value
|
|
*
|
|
* @param {string} key
|
|
* @param {Object} value
|
|
* @api private
|
|
*/
|
|
|
|
_setOptionValue(key, value) {
|
|
if (this._storeOptionsAsProperties) {
|
|
this[key] = value;
|
|
} else {
|
|
this._optionValues[key] = value;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Retrieve option value
|
|
*
|
|
* @param {string} key
|
|
* @return {Object} value
|
|
* @api private
|
|
*/
|
|
|
|
_getOptionValue(key) {
|
|
if (this._storeOptionsAsProperties) {
|
|
return this[key];
|
|
}
|
|
return this._optionValues[key];
|
|
};
|
|
|
|
/**
|
|
* Parse `argv`, setting options and invoking commands when defined.
|
|
*
|
|
* The default expectation is that the arguments are from node and have the application as argv[0]
|
|
* and the script being run in argv[1], with user parameters after that.
|
|
*
|
|
* Examples:
|
|
*
|
|
* program.parse(process.argv);
|
|
* program.parse(); // implicitly use process.argv and auto-detect node vs electron conventions
|
|
* program.parse(my-args, { from: 'user' }); // just user supplied arguments, nothing special about argv[0]
|
|
*
|
|
* @param {string[]} [argv] - optional, defaults to process.argv
|
|
* @param {Object} [parseOptions] - optionally specify style of options with from: node/user/electron
|
|
* @param {string} [parseOptions.from] - where the args are from: 'node', 'user', 'electron'
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
parse(argv, parseOptions) {
|
|
if (argv !== undefined && !Array.isArray(argv)) {
|
|
throw new Error('first parameter to parse must be array or undefined');
|
|
}
|
|
parseOptions = parseOptions || {};
|
|
|
|
// Default to using process.argv
|
|
if (argv === undefined) {
|
|
argv = process.argv;
|
|
// @ts-ignore: unknown property
|
|
if (process.versions && process.versions.electron) {
|
|
parseOptions.from = 'electron';
|
|
}
|
|
}
|
|
this.rawArgs = argv.slice();
|
|
|
|
// make it a little easier for callers by supporting various argv conventions
|
|
let userArgs;
|
|
switch (parseOptions.from) {
|
|
case undefined:
|
|
case 'node':
|
|
this._scriptPath = argv[1];
|
|
userArgs = argv.slice(2);
|
|
break;
|
|
case 'electron':
|
|
// @ts-ignore: 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;
|
|
default:
|
|
throw new Error(`unexpected parse option { from: '${parseOptions.from}' }`);
|
|
}
|
|
if (!this._scriptPath && require.main) {
|
|
this._scriptPath = require.main.filename;
|
|
}
|
|
|
|
// Guess name, used in usage in help.
|
|
this._name = this._name || (this._scriptPath && path.basename(this._scriptPath, path.extname(this._scriptPath)));
|
|
|
|
// Let's go!
|
|
this._parseCommand([], userArgs);
|
|
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Parse `argv`, setting options and invoking commands when defined.
|
|
*
|
|
* Use parseAsync instead of parse if any of your action handlers are async. Returns a Promise.
|
|
*
|
|
* The default expectation is that the arguments are from node and have the application as argv[0]
|
|
* and the script being run in argv[1], with user parameters after that.
|
|
*
|
|
* Examples:
|
|
*
|
|
* program.parseAsync(process.argv);
|
|
* program.parseAsync(); // implicitly use process.argv and auto-detect node vs electron conventions
|
|
* program.parseAsync(my-args, { from: 'user' }); // just user supplied arguments, nothing special about argv[0]
|
|
*
|
|
* @param {string[]} [argv]
|
|
* @param {Object} [parseOptions]
|
|
* @param {string} parseOptions.from - where the args are from: 'node', 'user', 'electron'
|
|
* @return {Promise}
|
|
*/
|
|
|
|
parseAsync(argv, parseOptions) {
|
|
this.parse(argv, parseOptions);
|
|
return Promise.all(this._actionResults).then(() => this);
|
|
};
|
|
|
|
/**
|
|
* Execute a sub-command executable.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
_executeSubCommand(subcommand, args) {
|
|
args = args.slice();
|
|
let launchWithNode = false; // Use node for source targets so do not need to get permissions correct, and on Windows.
|
|
const sourceExt = ['.js', '.ts', '.tsx', '.mjs', '.cjs'];
|
|
|
|
// Not checking for help first. Unlikely to have mandatory and executable, and can't robustly test for help flags in external command.
|
|
this._checkForMissingMandatoryOptions();
|
|
|
|
// Want the entry script as the reference for command name and directory for searching for other files.
|
|
let scriptPath = this._scriptPath;
|
|
// Fallback in case not set, due to how Command created or called.
|
|
if (!scriptPath && require.main) {
|
|
scriptPath = require.main.filename;
|
|
}
|
|
|
|
let baseDir;
|
|
try {
|
|
const resolvedLink = fs.realpathSync(scriptPath);
|
|
baseDir = path.dirname(resolvedLink);
|
|
} catch (e) {
|
|
baseDir = '.'; // dummy, probably not going to find executable!
|
|
}
|
|
|
|
// name of the subcommand, like `pm-install`
|
|
let bin = path.basename(scriptPath, path.extname(scriptPath)) + '-' + subcommand._name;
|
|
if (subcommand._executableFile) {
|
|
bin = subcommand._executableFile;
|
|
}
|
|
|
|
const localBin = path.join(baseDir, bin);
|
|
if (fs.existsSync(localBin)) {
|
|
// prefer local `./<bin>` to bin in the $PATH
|
|
bin = localBin;
|
|
} else {
|
|
// Look for source files.
|
|
sourceExt.forEach((ext) => {
|
|
if (fs.existsSync(`${localBin}${ext}`)) {
|
|
bin = `${localBin}${ext}`;
|
|
}
|
|
});
|
|
}
|
|
launchWithNode = sourceExt.includes(path.extname(bin));
|
|
|
|
let proc;
|
|
if (process.platform !== 'win32') {
|
|
if (launchWithNode) {
|
|
args.unshift(bin);
|
|
// add executable arguments to spawn
|
|
args = incrementNodeInspectorPort(process.execArgv).concat(args);
|
|
|
|
proc = childProcess.spawn(process.argv[0], args, { stdio: 'inherit' });
|
|
} else {
|
|
proc = childProcess.spawn(bin, args, { stdio: 'inherit' });
|
|
}
|
|
} else {
|
|
args.unshift(bin);
|
|
// add executable arguments to spawn
|
|
args = incrementNodeInspectorPort(process.execArgv).concat(args);
|
|
proc = childProcess.spawn(process.execPath, args, { stdio: 'inherit' });
|
|
}
|
|
|
|
const signals = ['SIGUSR1', 'SIGUSR2', 'SIGTERM', 'SIGINT', 'SIGHUP'];
|
|
signals.forEach((signal) => {
|
|
// @ts-ignore
|
|
process.on(signal, () => {
|
|
if (proc.killed === false && proc.exitCode === null) {
|
|
proc.kill(signal);
|
|
}
|
|
});
|
|
});
|
|
|
|
// By default terminate process when spawned process terminates.
|
|
// Suppressing the exit if exitCallback defined is a bit messy and of limited use, but does allow process to stay running!
|
|
const exitCallback = this._exitCallback;
|
|
if (!exitCallback) {
|
|
proc.on('close', process.exit.bind(process));
|
|
} else {
|
|
proc.on('close', () => {
|
|
exitCallback(new CommanderError(process.exitCode || 0, 'commander.executeSubCommandAsync', '(close)'));
|
|
});
|
|
}
|
|
proc.on('error', (err) => {
|
|
// @ts-ignore
|
|
if (err.code === 'ENOENT') {
|
|
const executableMissing = `'${bin}' does not exist
|
|
- if '${subcommand._name}' is not meant to be an executable command, remove description parameter from '.command()' and use '.description()' instead
|
|
- if the default executable name is not suitable, use the executableFile option to supply a custom name`;
|
|
throw new Error(executableMissing);
|
|
// @ts-ignore
|
|
} else if (err.code === 'EACCES') {
|
|
throw new Error(`'${bin}' not executable`);
|
|
}
|
|
if (!exitCallback) {
|
|
process.exit(1);
|
|
} else {
|
|
const wrappedError = new CommanderError(1, 'commander.executeSubCommandAsync', '(error)');
|
|
wrappedError.nestedError = err;
|
|
exitCallback(wrappedError);
|
|
}
|
|
});
|
|
|
|
// Store the reference to the child process
|
|
this.runningCommand = proc;
|
|
};
|
|
|
|
/**
|
|
* @api private
|
|
*/
|
|
_dispatchSubcommand(commandName, operands, unknown) {
|
|
const subCommand = this._findCommand(commandName);
|
|
if (!subCommand) this.help({ error: true });
|
|
|
|
if (subCommand._executableHandler) {
|
|
this._executeSubCommand(subCommand, operands.concat(unknown));
|
|
} else {
|
|
subCommand._parseCommand(operands, unknown);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Process arguments in context of this command.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
_parseCommand(operands, unknown) {
|
|
const parsed = this.parseOptions(unknown);
|
|
operands = operands.concat(parsed.operands);
|
|
unknown = parsed.unknown;
|
|
this.args = operands.concat(unknown);
|
|
|
|
if (operands && this._findCommand(operands[0])) {
|
|
this._dispatchSubcommand(operands[0], operands.slice(1), unknown);
|
|
} else if (this._hasImplicitHelpCommand() && operands[0] === this._helpCommandName) {
|
|
if (operands.length === 1) {
|
|
this.help();
|
|
} else {
|
|
this._dispatchSubcommand(operands[1], [], [this._helpLongFlag]);
|
|
}
|
|
} else if (this._defaultCommandName) {
|
|
outputHelpIfRequested(this, unknown); // Run the help for default command from parent rather than passing to default command
|
|
this._dispatchSubcommand(this._defaultCommandName, operands, unknown);
|
|
} else {
|
|
if (this.commands.length && this.args.length === 0 && !this._actionHandler && !this._defaultCommandName) {
|
|
// probably missing subcommand and no handler, user needs help
|
|
this.help({ error: true });
|
|
}
|
|
|
|
outputHelpIfRequested(this, parsed.unknown);
|
|
this._checkForMissingMandatoryOptions();
|
|
|
|
// 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();
|
|
// Check expected arguments and collect variadic together.
|
|
const args = this.args.slice();
|
|
this._args.forEach((arg, i) => {
|
|
if (arg.required && args[i] == null) {
|
|
this.missingArgument(arg.name);
|
|
} else if (arg.variadic) {
|
|
args[i] = args.splice(i);
|
|
args.length = Math.min(i + 1, args.length);
|
|
}
|
|
});
|
|
if (args.length > this._args.length) {
|
|
this._excessArguments(args);
|
|
}
|
|
|
|
this._actionHandler(args);
|
|
if (this.parent) this.parent.emit(commandEvent, operands, unknown); // legacy
|
|
} else if (this.parent && this.parent.listenerCount(commandEvent)) {
|
|
checkForUnknownOptions();
|
|
this.parent.emit(commandEvent, operands, unknown); // legacy
|
|
} else if (operands.length) {
|
|
if (this._findCommand('*')) { // legacy default command
|
|
this._dispatchSubcommand('*', operands, unknown);
|
|
} else 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();
|
|
}
|
|
} else if (this.commands.length) {
|
|
// This command has subcommands and nothing hooked up at this level, so display help.
|
|
this.help({ error: true });
|
|
} else {
|
|
checkForUnknownOptions();
|
|
// fall through for caller to handle after calling .parse()
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Find matching command.
|
|
*
|
|
* @api private
|
|
*/
|
|
_findCommand(name) {
|
|
if (!name) return undefined;
|
|
return this.commands.find(cmd => cmd._name === name || cmd._aliases.includes(name));
|
|
};
|
|
|
|
/**
|
|
* Return an option matching `arg` if any.
|
|
*
|
|
* @param {string} arg
|
|
* @return {Option}
|
|
* @api private
|
|
*/
|
|
|
|
_findOption(arg) {
|
|
return this.options.find(option => option.is(arg));
|
|
};
|
|
|
|
/**
|
|
* Display an error message if a mandatory option does not have a value.
|
|
* Lazy calling after checking for help flags from leaf subcommand.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
_checkForMissingMandatoryOptions() {
|
|
// Walk up hierarchy so can call in subcommand after checking for displaying help.
|
|
for (let cmd = this; cmd; cmd = cmd.parent) {
|
|
cmd.options.forEach((anOption) => {
|
|
if (anOption.mandatory && (cmd._getOptionValue(anOption.attributeName()) === undefined)) {
|
|
cmd.missingMandatoryOptionValue(anOption);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Parse options from `argv` removing known options,
|
|
* and return argv split into operands and unknown arguments.
|
|
*
|
|
* Examples:
|
|
*
|
|
* argv => operands, unknown
|
|
* --known kkk op => [op], []
|
|
* op --known kkk => [op], []
|
|
* sub --unknown uuu op => [sub], [--unknown uuu op]
|
|
* sub -- --unknown uuu op => [sub --unknown uuu op], []
|
|
*
|
|
* @param {String[]} argv
|
|
* @return {{operands: String[], unknown: String[]}}
|
|
*/
|
|
|
|
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 (arg === this._helpCommandName && this._hasImplicitHelpCommand()) {
|
|
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 options 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;
|
|
};
|
|
|
|
/**
|
|
* Internal bottleneck for handling of parsing errors.
|
|
*
|
|
* @api private
|
|
*/
|
|
_displayError(exitCode, code, message) {
|
|
this._outputConfiguration.outputError(`${message}\n`, this._outputConfiguration.writeErr);
|
|
this._exit(exitCode, code, message);
|
|
}
|
|
|
|
/**
|
|
* Argument `name` is missing.
|
|
*
|
|
* @param {string} name
|
|
* @api private
|
|
*/
|
|
|
|
missingArgument(name) {
|
|
const message = `error: missing required argument '${name}'`;
|
|
this._displayError(1, 'commander.missingArgument', message);
|
|
};
|
|
|
|
/**
|
|
* `Option` is missing an argument.
|
|
*
|
|
* @param {Option} option
|
|
* @api private
|
|
*/
|
|
|
|
optionMissingArgument(option) {
|
|
const message = `error: option '${option.flags}' argument missing`;
|
|
this._displayError(1, 'commander.optionMissingArgument', message);
|
|
};
|
|
|
|
/**
|
|
* `Option` does not have a value, and is a mandatory option.
|
|
*
|
|
* @param {Option} option
|
|
* @api private
|
|
*/
|
|
|
|
missingMandatoryOptionValue(option) {
|
|
const message = `error: required option '${option.flags}' not specified`;
|
|
this._displayError(1, 'commander.missingMandatoryOptionValue', message);
|
|
};
|
|
|
|
/**
|
|
* Unknown option `flag`.
|
|
*
|
|
* @param {string} flag
|
|
* @api private
|
|
*/
|
|
|
|
unknownOption(flag) {
|
|
if (this._allowUnknownOption) return;
|
|
const message = `error: unknown option '${flag}'`;
|
|
this._displayError(1, 'commander.unknownOption', message);
|
|
};
|
|
|
|
/**
|
|
* Excess arguments, more than expected.
|
|
*
|
|
* @param {string[]} receivedArgs
|
|
* @api private
|
|
*/
|
|
|
|
_excessArguments(receivedArgs) {
|
|
if (this._allowExcessArguments) return;
|
|
|
|
const expected = this._args.length;
|
|
const s = (expected === 1) ? '' : 's';
|
|
const forSubcommand = this.parent ? ` for '${this.name()}'` : '';
|
|
const message = `error: too many arguments${forSubcommand}. Expected ${expected} argument${s} but got ${receivedArgs.length}.`;
|
|
this._displayError(1, 'commander.excessArguments', message);
|
|
};
|
|
|
|
/**
|
|
* Unknown command.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
unknownCommand() {
|
|
const partCommands = [this.name()];
|
|
for (let parentCmd = this.parent; parentCmd; parentCmd = parentCmd.parent) {
|
|
partCommands.unshift(parentCmd.name());
|
|
}
|
|
const fullCommand = partCommands.join(' ');
|
|
const message = `error: unknown command '${this.args[0]}'.` +
|
|
(this._hasHelpOption ? ` See '${fullCommand} ${this._helpLongFlag}'.` : '');
|
|
this._displayError(1, 'commander.unknownCommand', message);
|
|
};
|
|
|
|
/**
|
|
* Set the program version to `str`.
|
|
*
|
|
* This method auto-registers the "-V, --version" flag
|
|
* which will print the version number when passed.
|
|
*
|
|
* You can optionally supply the flags and description to override the defaults.
|
|
*
|
|
* @param {string} str
|
|
* @param {string} [flags]
|
|
* @param {string} [description]
|
|
* @return {this | string} `this` command for chaining, or version string if no arguments
|
|
*/
|
|
|
|
version(str, flags, description) {
|
|
if (str === undefined) return this._version;
|
|
this._version = str;
|
|
flags = flags || '-V, --version';
|
|
description = description || 'output the version number';
|
|
const versionOption = this.createOption(flags, description);
|
|
this._versionOptionName = versionOption.attributeName();
|
|
this.options.push(versionOption);
|
|
this.on('option:' + versionOption.name(), () => {
|
|
this._outputConfiguration.writeOut(`${str}\n`);
|
|
this._exit(0, 'commander.version', str);
|
|
});
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Set the description to `str`.
|
|
*
|
|
* @param {string} [str]
|
|
* @param {Object} [argsDescription]
|
|
* @return {string|Command}
|
|
*/
|
|
description(str, argsDescription) {
|
|
if (str === undefined && argsDescription === undefined) return this._description;
|
|
this._description = str;
|
|
this._argsDescription = argsDescription;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Set an alias for the command.
|
|
*
|
|
* You may call more than once to add multiple aliases. Only the first alias is shown in the auto-generated help.
|
|
*
|
|
* @param {string} [alias]
|
|
* @return {string|Command}
|
|
*/
|
|
|
|
alias(alias) {
|
|
if (alias === undefined) return this._aliases[0]; // just return first, for backwards compatibility
|
|
|
|
let command = this;
|
|
if (this.commands.length !== 0 && this.commands[this.commands.length - 1]._executableHandler) {
|
|
// assume adding alias for last added executable subcommand, rather than this
|
|
command = this.commands[this.commands.length - 1];
|
|
}
|
|
|
|
if (alias === command._name) throw new Error('Command alias can\'t be the same as its name');
|
|
|
|
command._aliases.push(alias);
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Set aliases for the command.
|
|
*
|
|
* Only the first alias is shown in the auto-generated help.
|
|
*
|
|
* @param {string[]} [aliases]
|
|
* @return {string[]|Command}
|
|
*/
|
|
|
|
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._args.map((arg) => {
|
|
return humanReadableArgName(arg);
|
|
});
|
|
return [].concat(
|
|
(this.options.length || this._hasHelpOption ? '[options]' : []),
|
|
(this.commands.length ? '[command]' : []),
|
|
(this._args.length ? args : [])
|
|
).join(' ');
|
|
}
|
|
|
|
this._usage = str;
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Get or set the name of the command
|
|
*
|
|
* @param {string} [str]
|
|
* @return {string|Command}
|
|
*/
|
|
|
|
name(str) {
|
|
if (str === undefined) return this._name;
|
|
this._name = str;
|
|
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);
|
|
};
|
|
|
|
/**
|
|
* @api 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);
|
|
|
|
const groupListeners = [];
|
|
let command = this;
|
|
while (command) {
|
|
groupListeners.push(command); // ordered from current command to root
|
|
command = command.parent;
|
|
}
|
|
|
|
groupListeners.slice().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);
|
|
|
|
this.emit(this._helpLongFlag); // deprecated
|
|
this.emit('afterHelp', context);
|
|
groupListeners.forEach(command => command.emit('afterAllHelp', context));
|
|
};
|
|
|
|
/**
|
|
* You can pass in flags and a description to override the help
|
|
* flags and help description for your command. Pass in false to
|
|
* disable the built-in help option.
|
|
*
|
|
* @param {string | boolean} [flags]
|
|
* @param {string} [description]
|
|
* @return {Command} `this` command for chaining
|
|
*/
|
|
|
|
helpOption(flags, description) {
|
|
if (typeof flags === 'boolean') {
|
|
this._hasHelpOption = flags;
|
|
return this;
|
|
}
|
|
this._helpFlags = flags || this._helpFlags;
|
|
this._helpDescription = description || this._helpDescription;
|
|
|
|
const helpFlags = _parseOptionFlags(this._helpFlags);
|
|
this._helpShortFlag = helpFlags.shortFlag;
|
|
this._helpLongFlag = helpFlags.longFlag;
|
|
|
|
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;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Expose the root command.
|
|
*/
|
|
|
|
exports = module.exports = new Command();
|
|
exports.program = exports; // More explicit access to global command.
|
|
|
|
/**
|
|
* Expose classes
|
|
*/
|
|
|
|
exports.Command = Command;
|
|
exports.Option = Option;
|
|
exports.CommanderError = CommanderError;
|
|
exports.InvalidOptionArgumentError = InvalidOptionArgumentError;
|
|
exports.Help = Help;
|
|
|
|
/**
|
|
* Camel-case the given `flag`
|
|
*
|
|
* @param {string} flag
|
|
* @return {string}
|
|
* @api private
|
|
*/
|
|
|
|
function camelcase(flag) {
|
|
return flag.split('-').reduce((str, word) => {
|
|
return str + word[0].toUpperCase() + word.slice(1);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Output help information if help flags specified
|
|
*
|
|
* @param {Command} cmd - command to output help for
|
|
* @param {Array} args - array of options to search for help flags
|
|
* @api private
|
|
*/
|
|
|
|
function outputHelpIfRequested(cmd, args) {
|
|
const helpOption = cmd._hasHelpOption && args.find(arg => arg === cmd._helpLongFlag || arg === cmd._helpShortFlag);
|
|
if (helpOption) {
|
|
cmd.outputHelp();
|
|
// (Do not have all displayed text available so only passing placeholder.)
|
|
cmd._exit(0, 'commander.helpDisplayed', '(outputHelp)');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Takes an argument and returns its human readable equivalent for help usage.
|
|
*
|
|
* @param {Object} arg
|
|
* @return {string}
|
|
* @api private
|
|
*/
|
|
|
|
function humanReadableArgName(arg) {
|
|
const nameOutput = arg.name + (arg.variadic === true ? '...' : '');
|
|
|
|
return arg.required
|
|
? '<' + nameOutput + '>'
|
|
: '[' + nameOutput + ']';
|
|
}
|
|
|
|
/**
|
|
* Parse the short and long flag out of something like '-m,--mixed <value>'
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
function _parseOptionFlags(flags) {
|
|
let shortFlag;
|
|
let longFlag;
|
|
// Use original very loose parsing to maintain backwards compatibility for now,
|
|
// which allowed for example unintended `-sw, --short-word` [sic].
|
|
const flagParts = flags.split(/[ |,]+/);
|
|
if (flagParts.length > 1 && !/^[[<]/.test(flagParts[1])) shortFlag = flagParts.shift();
|
|
longFlag = flagParts.shift();
|
|
// Add support for lone short flag without significantly changing parsing!
|
|
if (!shortFlag && /^-[^-]$/.test(longFlag)) {
|
|
shortFlag = longFlag;
|
|
longFlag = undefined;
|
|
}
|
|
return { shortFlag, longFlag };
|
|
}
|
|
|
|
/**
|
|
* Scan arguments and increment port number for inspect calls (to avoid conflicts when spawning new command).
|
|
*
|
|
* @param {string[]} args - array of arguments from node.execArgv
|
|
* @returns {string[]}
|
|
* @api private
|
|
*/
|
|
|
|
function incrementNodeInspectorPort(args) {
|
|
// Testing for these options:
|
|
// --inspect[=[host:]port]
|
|
// --inspect-brk[=[host:]port]
|
|
// --inspect-port=[host:]port
|
|
return args.map((arg) => {
|
|
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;
|
|
});
|
|
}
|