cac/mod.js

// Copyright Joyent, Inc. and other Node contributors.

var R = typeof Reflect === 'object' ? Reflect : null;
var ReflectApply = R && typeof R.apply === 'function'
  ? R.apply
  : function ReflectApply(target, receiver, args) {
    return Function.prototype.apply.call(target, receiver, args);
  };

var ReflectOwnKeys;
if (R && typeof R.ownKeys === 'function') {
  ReflectOwnKeys = R.ownKeys;
} else if (Object.getOwnPropertySymbols) {
  ReflectOwnKeys = function ReflectOwnKeys(target) {
    return Object.getOwnPropertyNames(target)
      .concat(Object.getOwnPropertySymbols(target));
  };
} else {
  ReflectOwnKeys = function ReflectOwnKeys(target) {
    return Object.getOwnPropertyNames(target);
  };
}

function ProcessEmitWarning(warning) {
  if (console && console.warn) console.warn(warning);
}

var NumberIsNaN = Number.isNaN || function NumberIsNaN(value) {
  return value !== value;
};

function EventEmitter() {
  EventEmitter.init.call(this);
}
var events = EventEmitter;

// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.prototype._events = undefined;
EventEmitter.prototype._eventsCount = 0;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
var defaultMaxListeners = 10;

Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
  enumerable: true,
  get: function() {
    return defaultMaxListeners;
  },
  set: function(arg) {
    if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
      throw new RangeError('The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' + arg + '.');
    }
    defaultMaxListeners = arg;
  }
});

EventEmitter.init = function() {

  if (this._events === undefined ||
      this._events === Object.getPrototypeOf(this)._events) {
    this._events = Object.create(null);
    this._eventsCount = 0;
  }

  this._maxListeners = this._maxListeners || undefined;
};

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
  if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
    throw new RangeError('The value of "n" is out of range. It must be a non-negative number. Received ' + n + '.');
  }
  this._maxListeners = n;
  return this;
};

function $getMaxListeners(that) {
  if (that._maxListeners === undefined)
    return EventEmitter.defaultMaxListeners;
  return that._maxListeners;
}

EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
  return $getMaxListeners(this);
};

EventEmitter.prototype.emit = function emit(type) {
  var args = [];
  for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
  var doError = (type === 'error');

  var events = this._events;
  if (events !== undefined)
    doError = (doError && events.error === undefined);
  else if (!doError)
    return false;

  // If there is no 'error' event listener then throw.
  if (doError) {
    var er;
    if (args.length > 0)
      er = args[0];
    if (er instanceof Error) {
      // Note: The comments on the `throw` lines are intentional, they show
      // up in Node's output if this results in an unhandled exception.
      throw er; // Unhandled 'error' event
    }
    // At least give some kind of context to the user
    var err = new Error('Unhandled error.' + (er ? ' (' + er.message + ')' : ''));
    err.context = er;
    throw err; // Unhandled 'error' event
  }

  var handler = events[type];

  if (handler === undefined)
    return false;

  if (typeof handler === 'function') {
    ReflectApply(handler, this, args);
  } else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      ReflectApply(listeners[i], this, args);
  }

  return true;
};

function _addListener(target, type, listener, prepend) {
  var m;
  var events;
  var existing;

  if (typeof listener !== 'function') {
    throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
  }

  events = target._events;
  if (events === undefined) {
    events = target._events = Object.create(null);
    target._eventsCount = 0;
  } else {
    // To avoid recursion in the case that type === "newListener"! Before
    // adding it to the listeners, first emit "newListener".
    if (events.newListener !== undefined) {
      target.emit('newListener', type,
                  listener.listener ? listener.listener : listener);

      // Re-assign `events` because a newListener handler could have caused the
      // this._events to be assigned to a new object
      events = target._events;
    }
    existing = events[type];
  }

  if (existing === undefined) {
    // Optimize the case of one listener. Don't need the extra array object.
    existing = events[type] = listener;
    ++target._eventsCount;
  } else {
    if (typeof existing === 'function') {
      // Adding the second element, need to change to array.
      existing = events[type] =
        prepend ? [listener, existing] : [existing, listener];
      // If we've already got an array, just append.
    } else if (prepend) {
      existing.unshift(listener);
    } else {
      existing.push(listener);
    }

    // Check for listener leak
    m = $getMaxListeners(target);
    if (m > 0 && existing.length > m && !existing.warned) {
      existing.warned = true;
      // No error code for this since it is a Warning
      // eslint-disable-next-line no-restricted-syntax
      var w = new Error('Possible EventEmitter memory leak detected. ' +
                          existing.length + ' ' + String(type) + ' listeners ' +
                          'added. Use emitter.setMaxListeners() to ' +
                          'increase limit');
      w.name = 'MaxListenersExceededWarning';
      w.emitter = target;
      w.type = type;
      w.count = existing.length;
      ProcessEmitWarning(w);
    }
  }

  return target;
}

EventEmitter.prototype.addListener = function addListener(type, listener) {
  return _addListener(this, type, listener, false);
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.prependListener =
    function prependListener(type, listener) {
      return _addListener(this, type, listener, true);
    };

function onceWrapper() {
  var args = [];
  for (var i = 0; i < arguments.length; i++) args.push(arguments[i]);
  if (!this.fired) {
    this.target.removeListener(this.type, this.wrapFn);
    this.fired = true;
    ReflectApply(this.listener, this.target, args);
  }
}

function _onceWrap(target, type, listener) {
  var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
  var wrapped = onceWrapper.bind(state);
  wrapped.listener = listener;
  state.wrapFn = wrapped;
  return wrapped;
}

EventEmitter.prototype.once = function once(type, listener) {
  if (typeof listener !== 'function') {
    throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
  }
  this.on(type, _onceWrap(this, type, listener));
  return this;
};

EventEmitter.prototype.prependOnceListener =
    function prependOnceListener(type, listener) {
      if (typeof listener !== 'function') {
        throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
      }
      this.prependListener(type, _onceWrap(this, type, listener));
      return this;
    };

// Emits a 'removeListener' event if and only if the listener was removed.
EventEmitter.prototype.removeListener =
    function removeListener(type, listener) {
      var list, events, position, i, originalListener;

      if (typeof listener !== 'function') {
        throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
      }

      events = this._events;
      if (events === undefined)
        return this;

      list = events[type];
      if (list === undefined)
        return this;

      if (list === listener || list.listener === listener) {
        if (--this._eventsCount === 0)
          this._events = Object.create(null);
        else {
          delete events[type];
          if (events.removeListener)
            this.emit('removeListener', type, list.listener || listener);
        }
      } else if (typeof list !== 'function') {
        position = -1;

        for (i = list.length - 1; i >= 0; i--) {
          if (list[i] === listener || list[i].listener === listener) {
            originalListener = list[i].listener;
            position = i;
            break;
          }
        }

        if (position < 0)
          return this;

        if (position === 0)
          list.shift();
        else {
          spliceOne(list, position);
        }

        if (list.length === 1)
          events[type] = list[0];

        if (events.removeListener !== undefined)
          this.emit('removeListener', type, originalListener || listener);
      }

      return this;
    };

EventEmitter.prototype.off = EventEmitter.prototype.removeListener;

EventEmitter.prototype.removeAllListeners =
    function removeAllListeners(type) {
      var listeners, events, i;

      events = this._events;
      if (events === undefined)
        return this;

      // not listening for removeListener, no need to emit
      if (events.removeListener === undefined) {
        if (arguments.length === 0) {
          this._events = Object.create(null);
          this._eventsCount = 0;
        } else if (events[type] !== undefined) {
          if (--this._eventsCount === 0)
            this._events = Object.create(null);
          else
            delete events[type];
        }
        return this;
      }

      // emit removeListener for all listeners on all events
      if (arguments.length === 0) {
        var keys = Object.keys(events);
        var key;
        for (i = 0; i < keys.length; ++i) {
          key = keys[i];
          if (key === 'removeListener') continue;
          this.removeAllListeners(key);
        }
        this.removeAllListeners('removeListener');
        this._events = Object.create(null);
        this._eventsCount = 0;
        return this;
      }

      listeners = events[type];

      if (typeof listeners === 'function') {
        this.removeListener(type, listeners);
      } else if (listeners !== undefined) {
        // LIFO order
        for (i = listeners.length - 1; i >= 0; i--) {
          this.removeListener(type, listeners[i]);
        }
      }

      return this;
    };

function _listeners(target, type, unwrap) {
  var events = target._events;

  if (events === undefined)
    return [];

  var evlistener = events[type];
  if (evlistener === undefined)
    return [];

  if (typeof evlistener === 'function')
    return unwrap ? [evlistener.listener || evlistener] : [evlistener];

  return unwrap ?
    unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
}

EventEmitter.prototype.listeners = function listeners(type) {
  return _listeners(this, type, true);
};

EventEmitter.prototype.rawListeners = function rawListeners(type) {
  return _listeners(this, type, false);
};

EventEmitter.listenerCount = function(emitter, type) {
  if (typeof emitter.listenerCount === 'function') {
    return emitter.listenerCount(type);
  } else {
    return listenerCount.call(emitter, type);
  }
};

EventEmitter.prototype.listenerCount = listenerCount;
function listenerCount(type) {
  var events = this._events;

  if (events !== undefined) {
    var evlistener = events[type];

    if (typeof evlistener === 'function') {
      return 1;
    } else if (evlistener !== undefined) {
      return evlistener.length;
    }
  }

  return 0;
}

EventEmitter.prototype.eventNames = function eventNames() {
  return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
};

function arrayClone(arr, n) {
  var copy = new Array(n);
  for (var i = 0; i < n; ++i)
    copy[i] = arr[i];
  return copy;
}

function spliceOne(list, index) {
  for (; index + 1 < list.length; index++)
    list[index] = list[index + 1];
  list.pop();
}

function unwrapListeners(arr) {
  var ret = new Array(arr.length);
  for (var i = 0; i < ret.length; ++i) {
    ret[i] = arr[i].listener || arr[i];
  }
  return ret;
}
var events_1 = events.EventEmitter;

function toArr(any) {
	return any == null ? [] : Array.isArray(any) ? any : [any];
}

function toVal(out, key, val, opts) {
	var x, old=out[key], nxt=(
		!!~opts.string.indexOf(key) ? (val == null || val === true ? '' : String(val))
		: typeof val === 'boolean' ? val
		: !!~opts.boolean.indexOf(key) ? (val === 'false' ? false : val === 'true' || (out._.push((x = +val,x * 0 === 0) ? x : val),!!val))
		: (x = +val,x * 0 === 0) ? x : val
	);
	out[key] = old == null ? nxt : (Array.isArray(old) ? old.concat(nxt) : [old, nxt]);
}

var lib = function (args, opts) {
	args = args || [];
	opts = opts || {};

	var k, arr, arg, name, val, out={ _:[] };
	var i=0, j=0, idx=0, len=args.length;

	const alibi = opts.alias !== void 0;
	const strict = opts.unknown !== void 0;
	const defaults = opts.default !== void 0;

	opts.alias = opts.alias || {};
	opts.string = toArr(opts.string);
	opts.boolean = toArr(opts.boolean);

	if (alibi) {
		for (k in opts.alias) {
			arr = opts.alias[k] = toArr(opts.alias[k]);
			for (i=0; i < arr.length; i++) {
				(opts.alias[arr[i]] = arr.concat(k)).splice(i, 1);
			}
		}
	}

	opts.boolean.forEach(key => {
		opts.boolean = opts.boolean.concat(opts.alias[key] = opts.alias[key] || []);
	});

	opts.string.forEach(key => {
		opts.string = opts.string.concat(opts.alias[key] = opts.alias[key] || []);
	});

	if (defaults) {
		for (k in opts.default) {
			opts.alias[k] = opts.alias[k] || [];
			(opts[typeof opts.default[k]] || []).push(k);
		}
	}

	const keys = strict ? Object.keys(opts.alias) : [];

	for (i=0; i < len; i++) {
		arg = args[i];

		if (arg === '--') {
			out._ = out._.concat(args.slice(++i));
			break;
		}

		for (j=0; j < arg.length; j++) {
			if (arg.charCodeAt(j) !== 45) break; // "-"
		}

		if (j === 0) {
			out._.push(arg);
		} else if (arg.substring(j, j + 3) === 'no-') {
			name = arg.substring(j + 3);
			if (strict && !~keys.indexOf(name)) {
				return opts.unknown(arg);
			}
			out[name] = false;
		} else {
			for (idx=j+1; idx < arg.length; idx++) {
				if (arg.charCodeAt(idx) === 61) break; // "="
			}

			name = arg.substring(j, idx);
			val = arg.substring(++idx) || (i+1 === len || (''+args[i+1]).charCodeAt(0) === 45 || args[++i]);
			arr = (j === 2 ? [name] : name);

			for (idx=0; idx < arr.length; idx++) {
				name = arr[idx];
				if (strict && !~keys.indexOf(name)) return opts.unknown('-'.repeat(j) + name);
				toVal(out, name, (idx + 1 < arr.length) || val, opts);
			}
		}
	}

	if (defaults) {
		for (k in opts.default) {
			if (out[k] === void 0) {
				out[k] = opts.default[k];
			}
		}
	}

	if (alibi) {
		for (k in out) {
			arr = opts.alias[k] || [];
			while (arr.length > 0) {
				out[arr.shift()] = out[k];
			}
		}
	}

	return out;
};

const removeBrackets = (v) => v.replace(/[<[].+/, "").trim();
const findAllBrackets = (v) => {
  const ANGLED_BRACKET_RE_GLOBAL = /<([^>]+)>/g;
  const SQUARE_BRACKET_RE_GLOBAL = /\[([^\]]+)\]/g;
  const res = [];
  const parse = (match) => {
    let variadic = false;
    let value = match[1];
    if (value.startsWith("...")) {
      value = value.slice(3);
      variadic = true;
    }
    return {
      required: match[0].startsWith("<"),
      value,
      variadic
    };
  };
  let angledMatch;
  while (angledMatch = ANGLED_BRACKET_RE_GLOBAL.exec(v)) {
    res.push(parse(angledMatch));
  }
  let squareMatch;
  while (squareMatch = SQUARE_BRACKET_RE_GLOBAL.exec(v)) {
    res.push(parse(squareMatch));
  }
  return res;
};
const getMriOptions = (options) => {
  const result = {
    alias: {},
    boolean: []
  };
  for (const [index, option] of options.entries()) {
    if (option.names.length > 1) {
      result.alias[option.names[0]] = option.names.slice(1);
    }
    if (option.isBoolean) {
      if (option.negated) {
        const hasStringTypeOption = options.some((o, i) => {
          return i !== index && o.names.some((name) => option.names.includes(name)) && typeof o.required === "boolean";
        });
        if (!hasStringTypeOption) {
          result.boolean.push(option.names[0]);
        }
      } else {
        result.boolean.push(option.names[0]);
      }
    }
  }
  return result;
};
const findLongest = (arr) => {
  return arr.sort((a, b) => {
    return a.length > b.length ? -1 : 1;
  })[0];
};
const padRight = (str, length) => {
  return str.length >= length ? str : `${str}${" ".repeat(length - str.length)}`;
};
const camelcase = (input) => {
  return input.replace(/([a-z])-([a-z])/g, (_, p1, p2) => {
    return p1 + p2.toUpperCase();
  });
};
const setDotProp = (obj, keys, val) => {
  let i = 0;
  let length = keys.length;
  let t = obj;
  let x;
  for (; i < length; ++i) {
    x = t[keys[i]];
    t = t[keys[i]] = i === length - 1 ? val : x != null ? x : !!~keys[i + 1].indexOf(".") || !(+keys[i + 1] > -1) ? {} : [];
  }
};
const setByType = (obj, transforms) => {
  for (const key of Object.keys(transforms)) {
    const transform = transforms[key];
    if (transform.shouldTransform) {
      obj[key] = Array.prototype.concat.call([], obj[key]);
      if (typeof transform.transformFunction === "function") {
        obj[key] = obj[key].map(transform.transformFunction);
      }
    }
  }
};
const getFileName = (input) => {
  const m = /([^\\\/]+)$/.exec(input);
  return m ? m[1] : "";
};
const camelcaseOptionName = (name) => {
  return name.split(".").map((v, i) => {
    return i === 0 ? camelcase(v) : v;
  }).join(".");
};
class CACError extends Error {
  constructor(message) {
    super(message);
    this.name = this.constructor.name;
    if (typeof Error.captureStackTrace === "function") {
      Error.captureStackTrace(this, this.constructor);
    } else {
      this.stack = new Error(message).stack;
    }
  }
}

class Option {
  constructor(rawName, description, config) {
    this.rawName = rawName;
    this.description = description;
    this.config = Object.assign({}, config);
    rawName = rawName.replace(/\.\*/g, "");
    this.negated = false;
    this.names = removeBrackets(rawName).split(",").map((v) => {
      let name = v.trim().replace(/^-{1,2}/, "");
      if (name.startsWith("no-")) {
        this.negated = true;
        name = name.replace(/^no-/, "");
      }
      return camelcaseOptionName(name);
    }).sort((a, b) => a.length > b.length ? 1 : -1);
    this.name = this.names[this.names.length - 1];
    if (this.negated) {
      this.config.default = true;
    }
    if (rawName.includes("<")) {
      this.required = true;
    } else if (rawName.includes("[")) {
      this.required = false;
    } else {
      this.isBoolean = true;
    }
  }
}

const deno = typeof window !== "undefined" && window.Deno;
const processArgs = deno ? ["deno", "cli"].concat(Deno.args) : process.argv;
const platformInfo = deno ? `${Deno.build.os}-${Deno.build.arch} deno-${Deno.version.deno}` : `${process.platform}-${process.arch} node-${process.version}`;

class Command {
  constructor(rawName, description, config = {}, cli) {
    this.rawName = rawName;
    this.description = description;
    this.config = config;
    this.cli = cli;
    this.options = [];
    this.aliasNames = [];
    this.name = removeBrackets(rawName);
    this.args = findAllBrackets(rawName);
    this.examples = [];
  }
  usage(text) {
    this.usageText = text;
    return this;
  }
  allowUnknownOptions() {
    this.config.allowUnknownOptions = true;
    return this;
  }
  ignoreOptionDefaultValue() {
    this.config.ignoreOptionDefaultValue = true;
    return this;
  }
  version(version, customFlags = "-v, --version") {
    this.versionNumber = version;
    this.option(customFlags, "Display version number");
    return this;
  }
  example(example) {
    this.examples.push(example);
    return this;
  }
  option(rawName, description, config) {
    const option = new Option(rawName, description, config);
    this.options.push(option);
    return this;
  }
  alias(name) {
    this.aliasNames.push(name);
    return this;
  }
  action(callback) {
    this.commandAction = callback;
    return this;
  }
  isMatched(name) {
    return this.name === name || this.aliasNames.includes(name);
  }
  get isDefaultCommand() {
    return this.name === "" || this.aliasNames.includes("!");
  }
  get isGlobalCommand() {
    return this instanceof GlobalCommand;
  }
  hasOption(name) {
    name = name.split(".")[0];
    return this.options.find((option) => {
      return option.names.includes(name);
    });
  }
  outputHelp() {
    const {name, commands} = this.cli;
    const {versionNumber, options: globalOptions, helpCallback} = this.cli.globalCommand;
    const sections = [{
      body: `${name}${versionNumber ? ` v${versionNumber}` : ""}`
    }];
    sections.push({
      title: "Usage",
      body: `  $ ${name} ${this.usageText || this.rawName}`
    });
    const showCommands = (this.isGlobalCommand || this.isDefaultCommand) && commands.length > 0;
    if (showCommands) {
      const longestCommandName = findLongest(commands.map((command) => command.rawName));
      sections.push({
        title: "Commands",
        body: commands.map((command) => {
          return `  ${padRight(command.rawName, longestCommandName.length)}  ${command.description}`;
        }).join("\n")
      });
      sections.push({
        title: `For more info, run any command with the \`--help\` flag`,
        body: commands.map((command) => `  $ ${name}${command.name === "" ? "" : ` ${command.name}`} --help`).join("\n")
      });
    }
    const options = this.isGlobalCommand ? globalOptions : [...this.options, ...globalOptions || []];
    if (options.length > 0) {
      const longestOptionName = findLongest(options.map((option) => option.rawName));
      sections.push({
        title: "Options",
        body: options.map((option) => {
          return `  ${padRight(option.rawName, longestOptionName.length)}  ${option.description} ${option.config.default === void 0 ? "" : `(default: ${option.config.default})`}`;
        }).join("\n")
      });
    }
    if (this.examples.length > 0) {
      sections.push({
        title: "Examples",
        body: this.examples.map((example) => {
          if (typeof example === "function") {
            return example(name);
          }
          return example;
        }).join("\n")
      });
    }
    if (helpCallback) {
      helpCallback(sections);
    }
    console.log(sections.map((section) => {
      return section.title ? `${section.title}:
${section.body}` : section.body;
    }).join("\n\n"));
  }
  outputVersion() {
    const {name} = this.cli;
    const {versionNumber} = this.cli.globalCommand;
    if (versionNumber) {
      console.log(`${name}/${versionNumber} ${platformInfo}`);
    }
  }
  checkRequiredArgs() {
    const minimalArgsCount = this.args.filter((arg) => arg.required).length;
    if (this.cli.args.length < minimalArgsCount) {
      throw new CACError(`missing required args for command \`${this.rawName}\``);
    }
  }
  checkUnknownOptions() {
    const {options, globalCommand} = this.cli;
    if (!this.config.allowUnknownOptions) {
      for (const name of Object.keys(options)) {
        if (name !== "--" && !this.hasOption(name) && !globalCommand.hasOption(name)) {
          throw new CACError(`Unknown option \`${name.length > 1 ? `--${name}` : `-${name}`}\``);
        }
      }
    }
  }
  checkOptionValue() {
    const {options: parsedOptions, globalCommand} = this.cli;
    const options = [...globalCommand.options, ...this.options];
    for (const option of options) {
      const value = parsedOptions[option.name.split(".")[0]];
      if (option.required) {
        const hasNegated = options.some((o) => o.negated && o.names.includes(option.name));
        if (value === true || value === false && !hasNegated) {
          throw new CACError(`option \`${option.rawName}\` value is missing`);
        }
      }
    }
  }
}
class GlobalCommand extends Command {
  constructor(cli) {
    super("@@global@@", "", {}, cli);
  }
}

let __assign = Object.assign;
class CAC extends events_1 {
  constructor(name = "") {
    super();
    this.name = name;
    this.commands = [];
    this.globalCommand = new GlobalCommand(this);
    this.globalCommand.usage("<command> [options]");
  }
  usage(text) {
    this.globalCommand.usage(text);
    return this;
  }
  command(rawName, description, config) {
    const command = new Command(rawName, description || "", config, this);
    command.globalCommand = this.globalCommand;
    this.commands.push(command);
    return command;
  }
  option(rawName, description, config) {
    this.globalCommand.option(rawName, description, config);
    return this;
  }
  help(callback) {
    this.globalCommand.option("-h, --help", "Display this message");
    this.globalCommand.helpCallback = callback;
    this.showHelpOnExit = true;
    return this;
  }
  version(version, customFlags = "-v, --version") {
    this.globalCommand.version(version, customFlags);
    this.showVersionOnExit = true;
    return this;
  }
  example(example) {
    this.globalCommand.example(example);
    return this;
  }
  outputHelp() {
    if (this.matchedCommand) {
      this.matchedCommand.outputHelp();
    } else {
      this.globalCommand.outputHelp();
    }
  }
  outputVersion() {
    this.globalCommand.outputVersion();
  }
  setParsedInfo({args, options}, matchedCommand, matchedCommandName) {
    this.args = args;
    this.options = options;
    if (matchedCommand) {
      this.matchedCommand = matchedCommand;
    }
    if (matchedCommandName) {
      this.matchedCommandName = matchedCommandName;
    }
    return this;
  }
  parse(argv = processArgs, {run = true} = {}) {
    this.rawArgs = argv;
    if (!this.name) {
      this.name = argv[1] ? getFileName(argv[1]) : "cli";
    }
    let shouldParse = true;
    for (const command of this.commands) {
      const parsed = this.mri(argv.slice(2), command);
      const commandName = parsed.args[0];
      if (command.isMatched(commandName)) {
        shouldParse = false;
        const parsedInfo = __assign(__assign({}, parsed), {
          args: parsed.args.slice(1)
        });
        this.setParsedInfo(parsedInfo, command, commandName);
        this.emit(`command:${commandName}`, command);
      }
    }
    if (shouldParse) {
      for (const command of this.commands) {
        if (command.name === "") {
          shouldParse = false;
          const parsed = this.mri(argv.slice(2), command);
          this.setParsedInfo(parsed, command);
          this.emit(`command:!`, command);
        }
      }
    }
    if (shouldParse) {
      const parsed = this.mri(argv.slice(2));
      this.setParsedInfo(parsed);
    }
    if (this.options.help && this.showHelpOnExit) {
      this.outputHelp();
      run = false;
    }
    if (this.options.version && this.showVersionOnExit) {
      this.outputVersion();
      run = false;
    }
    const parsedArgv = {
      args: this.args,
      options: this.options
    };
    if (run) {
      this.runMatchedCommand();
    }
    if (!this.matchedCommand && this.args[0]) {
      this.emit("command:*");
    }
    return parsedArgv;
  }
  mri(argv, command) {
    const cliOptions = [...this.globalCommand.options, ...command ? command.options : []];
    const mriOptions = getMriOptions(cliOptions);
    let argsAfterDoubleDashes = [];
    const doubleDashesIndex = argv.indexOf("--");
    if (doubleDashesIndex > -1) {
      argsAfterDoubleDashes = argv.slice(doubleDashesIndex + 1);
      argv = argv.slice(0, doubleDashesIndex);
    }
    let parsed = lib(argv, mriOptions);
    parsed = Object.keys(parsed).reduce((res, name) => {
      return __assign(__assign({}, res), {
        [camelcaseOptionName(name)]: parsed[name]
      });
    }, {
      _: []
    });
    const args = parsed._;
    delete parsed._;
    const options = {
      "--": argsAfterDoubleDashes
    };
    const ignoreDefault = command && command.config.ignoreOptionDefaultValue ? command.config.ignoreOptionDefaultValue : this.globalCommand.config.ignoreOptionDefaultValue;
    let transforms = Object.create(null);
    for (const cliOption of cliOptions) {
      if (!ignoreDefault && cliOption.config.default !== void 0) {
        for (const name of cliOption.names) {
          options[name] = cliOption.config.default;
        }
      }
      if (Array.isArray(cliOption.config.type)) {
        if (transforms[cliOption.name] === void 0) {
          transforms[cliOption.name] = Object.create(null);
          transforms[cliOption.name]["shouldTransform"] = true;
          transforms[cliOption.name]["transformFunction"] = cliOption.config.type[0];
        }
      }
    }
    for (const key of Object.keys(parsed)) {
      const keys = key.split(".");
      setDotProp(options, keys, parsed[key]);
      setByType(options, transforms);
    }
    return {
      args,
      options
    };
  }
  runMatchedCommand() {
    const {args, options, matchedCommand: command} = this;
    if (!command || !command.commandAction)
      return;
    command.checkUnknownOptions();
    command.checkOptionValue();
    command.checkRequiredArgs();
    const actionArgs = [];
    command.args.forEach((arg, index) => {
      if (arg.variadic) {
        actionArgs.push(args.slice(index));
      } else {
        actionArgs.push(args[index]);
      }
    });
    actionArgs.push(options);
    return command.commandAction.apply(this, actionArgs);
  }
}

const cac = (name = "") => new CAC(name);
if (typeof module !== "undefined") {
  module.exports = cac;
  module.exports.default = cac;
  module.exports.cac = cac;
}

export default cac;
export { cac };