'use strict';
function hasKey(obj, keys) {
var o = obj;
keys.slice(0, -1).forEach(function (key) {
o = o[key] || {};
});
var key = keys[keys.length - 1];
return key in o;
}
function isNumber(x) {
if (typeof x === 'number') { return true; }
if ((/^0x[0-9a-f]+$/i).test(x)) { return true; }
return (/^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/).test(x);
}
function isConstructorOrProto(obj, key) {
return (key === 'constructor' && typeof obj[key] === 'function') || key === '__proto__';
}
module.exports = function (args, opts) {
if (!opts) { opts = {}; }
var flags = {
bools: {},
strings: {},
unknownFn: null,
};
if (typeof opts.unknown === 'function') {
flags.unknownFn = opts.unknown;
}
if (typeof opts.boolean === 'boolean' && opts.boolean) {
flags.allBools = true;
} else {
[].concat(opts.boolean).filter(Boolean).forEach(function (key) {
flags.bools[key] = true;
});
}
var aliases = {};
function aliasIsBoolean(key) {
return aliases[key].some(function (x) {
return flags.bools[x];
});
}
Object.keys(opts.alias || {}).forEach(function (key) {
aliases[key] = [].concat(opts.alias[key]);
aliases[key].forEach(function (x) {
aliases[x] = [key].concat(aliases[key].filter(function (y) {
return x !== y;
}));
});
});
[].concat(opts.string).filter(Boolean).forEach(function (key) {
flags.strings[key] = true;
if (aliases[key]) {
[].concat(aliases[key]).forEach(function (k) {
flags.strings[k] = true;
});
}
});
var defaults = opts.default || {};
var argv = { _: [] };
function argDefined(key, arg) {
return (flags.allBools && (/^--[^=]+$/).test(arg))
|| flags.strings[key]
|| flags.bools[key]
|| aliases[key];
}
function setKey(obj, keys, value) {
var o = obj;
for (var i = 0; i < keys.length - 1; i++) {
var key = keys[i];
if (isConstructorOrProto(o, key)) { return; }
if (o[key] === undefined) { o[key] = {}; }
if (
o[key] === Object.prototype
|| o[key] === Number.prototype
|| o[key] === String.prototype
) {
o[key] = {};
}
if (o[key] === Array.prototype) { o[key] = []; }
o = o[key];
}
var lastKey = keys[keys.length - 1];
if (isConstructorOrProto(o, lastKey)) { return; }
if (
o === Object.prototype
|| o === Number.prototype
|| o === String.prototype
) {
o = {};
}
if (o === Array.prototype) { o = []; }
if (o[lastKey] === undefined || flags.bools[lastKey] || typeof o[lastKey] === 'boolean') {
o[lastKey] = value;
} else if (Array.isArray(o[lastKey])) {
o[lastKey].push(value);
} else {
o[lastKey] = [o[lastKey], value];
}
}
function setArg(key, val, arg) {
if (arg && flags.unknownFn && !argDefined(key, arg)) {
if (flags.unknownFn(arg) === false) { return; }
}
var value = !flags.strings[key] && isNumber(val)
? Number(val)
: val;
setKey(argv, key.split('.'), value);
(aliases[key] || []).forEach(function (x) {
setKey(argv, x.split('.'), value);
});
}
Object.keys(flags.bools).forEach(function (key) {
setArg(key, defaults[key] === undefined ? false : defaults[key]);
});
var notFlags = [];
if (args.indexOf('--') !== -1) {
notFlags = args.slice(args.indexOf('--') + 1);
args = args.slice(0, args.indexOf('--'));
}
for (var i = 0; i < args.length; i++) {
var arg = args[i];
var key;
var next;
if ((/^--.+=/).test(arg)) {
// Using [\s\S] instead of . because js doesn't support the
// 'dotall' regex modifier. See:
// http://stackoverflow.com/a/1068308/13216
var m = arg.match(/^--([^=]+)=([\s\S]*)$/);
key = m[1];
var value = m[2];
if (flags.bools[key]) {
value = value !== 'false';
}
setArg(key, value, arg);
} else if ((/^--no-.+/).test(arg)) {
key = arg.match(/^--no-(.+)/)[1];
setArg(key, false, arg);
} else if ((/^--.+/).test(arg)) {
key = arg.match(/^--(.+)/)[1];
next = args[i + 1];
if (
next !== undefined
&& !(/^(-|--)[^-]/).test(next)
&& !flags.bools[key]
&& !flags.allBools
&& (aliases[key] ? !aliasIsBoolean(key) : true)
) {
setArg(key, next, arg);
i += 1;
} else if ((/^(true|false)$/).test(next)) {
setArg(key, next === 'true', arg);
i += 1;
} else {
setArg(key, flags.strings[key] ? '' : true, arg);
}
} else if ((/^-[^-]+/).test(arg)) {
var letters = arg.slice(1, -1).split('');
var broken = false;
for (var j = 0; j < letters.length; j++) {
next = arg.slice(j + 2);
if (next === '-') {
setArg(letters[j], next, arg);
continue;
}
if ((/[A-Za-z]/).test(letters[j]) && next[0] === '=') {
setArg(letters[j], next.slice(1), arg);
broken = true;
break;
}
if (
(/[A-Za-z]/).test(letters[j])
&& (/-?\d+(\.\d*)?(e-?\d+)?$/).test(next)
) {
setArg(letters[j], next, arg);
broken = true;
break;
}
if (letters[j + 1] && letters[j + 1].match(/\W/)) {
setArg(letters[j], arg.slice(j + 2), arg);
broken = true;
break;
} else {
setArg(letters[j], flags.strings[letters[j]] ? '' : true, arg);
}
}
key = arg.slice(-1)[0];
if (!broken && key !== '-') {
if (
args[i + 1]
&& !(/^(-|--)[^-]/).test(args[i + 1])
&& !flags.bools[key]
&& (aliases[key] ? !aliasIsBoolean(key) : true)
) {
setArg(key, args[i + 1], arg);
i += 1;
} else if (args[i + 1] && (/^(true|false)$/).test(args[i + 1])) {
setArg(key, args[i + 1] === 'true', arg);
i += 1;
} else {
setArg(key, flags.strings[key] ? '' : true, arg);
}
}
} else {
if (!flags.unknownFn || flags.unknownFn(arg) !== false) {
argv._.push(flags.strings._ || !isNumber(arg) ? arg : Number(arg));
}
if (opts.stopEarly) {
argv._.push.apply(argv._, args.slice(i + 1));
break;
}
}
}
Object.keys(defaults).forEach(function (k) {
if (!hasKey(argv, k.split('.'))) {
setKey(argv, k.split('.'), defaults[k]);
(aliases[k] || []).forEach(function (x) {
setKey(argv, x.split('.'), defaults[k]);
});
}
});
if (opts['--']) {
argv['--'] = notFlags.slice();
} else {
notFlags.forEach(function (k) {
argv._.push(k);
});
}
return argv;
};