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'--' : '_' var newAliases = {} // allow a i18n handler to be passed in, default to a fake one (util.format). var __ = opts.__ || util.format var error = null var flags = { aliases: {}, arrays: {}, bools: {}, strings: {}, numbers: {}, counts: {}, normalize: {}, configs: {}, defaulted: {}, nargs: {}, coercions: {}, keys: [] } var negative = /^-[0-9]+(\.[0-9]+)?/ var negatedBoolean = new RegExp('^--' + configuration['negation-prefix'] + '(.+)') ;[].concat(opts.array).filter(Boolean).forEach(function (opt) { var key = opt.key || opt // assign to flags[bools|strings|numbers] const assignment = Object.keys(opt).map(function (key) { return ({ boolean: 'bools', string: 'strings', number: 'numbers' })[key] }).filter(Boolean).pop() // assign key to be coerced if (assignment) { flags[assignment][key] = true } flags.arrays[key] = true flags.keys.push(key) }) ;[].concat(opts.boolean).filter(Boolean).forEach(function (key) { flags.bools[key] = true flags.keys.push(key) }) ;[].concat(opts.string).filter(Boolean).forEach(function (key) { flags.strings[key] = true flags.keys.push(key) }) ;[].concat(opts.number).filter(Boolean).forEach(function (key) { flags.numbers[key] = true flags.keys.push(key) }) ;[].concat(opts.count).filter(Boolean).forEach(function (key) { flags.counts[key] = true flags.keys.push(key) }) ;[].concat(opts.normalize).filter(Boolean).forEach(function (key) { flags.normalize[key] = true flags.keys.push(key) }) Object.keys(opts.narg || {}).forEach(function (k) { flags.nargs[k] = opts.narg[k] flags.keys.push(k) }) Object.keys(opts.coerce || {}).forEach(function (k) { flags.coercions[k] = opts.coerce[k] flags.keys.push(k) }) if (Array.isArray(opts.config) || typeof opts.config === 'string') { ;[].concat(opts.config).filter(Boolean).forEach(function (key) { flags.configs[key] = true }) } else { Object.keys(opts.config || {}).forEach(function (k) { flags.configs[k] = opts.config[k] }) } // create a lookup table that takes into account all // combinations of aliases: {f: ['foo'], foo: ['f']} extendAliases(opts.key, aliases, opts.default, flags.arrays) // apply default values to all aliases. Object.keys(defaults).forEach(function (key) { (flags.aliases[key] || []).forEach(function (alias) { defaults[alias] = defaults[key] }) }) var argv = { _: [] } Object.keys(flags.bools).forEach(function (key) { if (Object.prototype.hasOwnProperty.call(defaults, key)) { setArg(key, defaults[key]) setDefaulted(key) } }) var notFlags = [] for (var i = 0; i < args.length; i++) { var arg = args[i] var broken var key var letters var m var next var value // -- separated by = if (arg.match(/^--.+=/) || ( !configuration['short-option-groups'] && arg.match(/^-.+=/) )) { // Using [\s\S] instead of . because js doesn't support the // 'dotall' regex modifier. See: // http://stackoverflow.com/a/1068308/13216 m = arg.match(/^--?([^=]+)=([\s\S]*)$/) // nargs format = '--f=monkey washing cat' if (checkAllAliases(m[1], flags.nargs)) { args.splice(i + 1, 0, m[2]) i = eatNargs(i, m[1], args) // arrays format = '--f=a b c' } else if (checkAllAliases(m[1], flags.arrays) && args.length > i + 1) { args.splice(i + 1, 0, m[2]) i = eatArray(i, m[1], args) } else { setArg(m[1], m[2]) } } else if (arg.match(negatedBoolean) && configuration['boolean-negation']) { key = arg.match(negatedBoolean)[1] setArg(key, false) // -- seperated by space. } else if (arg.match(/^--.+/) || ( !configuration['short-option-groups'] && arg.match(/^-[^-]+/) )) { key = arg.match(/^--?(.+)/)[1] // nargs format = '--foo a b c' if (checkAllAliases(key, flags.nargs)) { i = eatNargs(i, key, args) // array format = '--foo a b c' } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) { i = eatArray(i, key, args) } else { next = flags.nargs[key] === 0 ? undefined : args[i + 1] if (next !== undefined && (!next.match(/^-/) || next.match(negative)) && !checkAllAliases(key, flags.bools) && !checkAllAliases(key, flags.counts)) { setArg(key, next) i++ } else if (/^(true|false)$/.test(next)) { setArg(key, next) i++ } else { setArg(key, defaultValue(key)) } } // dot-notation flag seperated by '='. } else if (arg.match(/^-.\..+=/)) { m = arg.match(/^-([^=]+)=([\s\S]*)$/) setArg(m[1], m[2]) // dot-notation flag seperated by space. } else if (arg.match(/^-.\..+/)) { next = args[i + 1] key = arg.match(/^-(.\..+)/)[1] if (next !== undefined && !next.match(/^-/) && !checkAllAliases(key, flags.bools) && !checkAllAliases(key, flags.counts)) { setArg(key, next) i++ } else { setArg(key, defaultValue(key)) } } else if (arg.match(/^-[^-]+/) && !arg.match(negative)) { letters = arg.slice(1, -1).split('') broken = false for (var j = 0; j < letters.length; j++) { next = arg.slice(j + 2) if (letters[j + 1] && letters[j + 1] === '=') { value = arg.slice(j + 3) key = letters[j] // nargs format = '-f=monkey washing cat' if (checkAllAliases(key, flags.nargs)) { args.splice(i + 1, 0, value) i = eatNargs(i, key, args) // array format = '-f=a b c' } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) { args.splice(i + 1, 0, value) i = eatArray(i, key, args) } else { setArg(key, value) } broken = true break } if (next === '-') { setArg(letters[j], next) continue } // current letter is an alphabetic character and next value is a number if (/[A-Za-z]/.test(letters[j]) && /^-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) { setArg(letters[j], next) broken = true break } if (letters[j + 1] && letters[j + 1].match(/\W/)) { setArg(letters[j], next) broken = true break } else { setArg(letters[j], defaultValue(letters[j])) } } key = arg.slice(-1)[0] if (!broken && key !== '-') { // nargs format = '-f a b c' if (checkAllAliases(key, flags.nargs)) { i = eatNargs(i, key, args) // array format = '-f a b c' } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) { i = eatArray(i, key, args) } else { next = args[i + 1] if (next !== undefined && (!/^(-|--)[^-]/.test(next) || next.match(negative)) && !checkAllAliases(key, flags.bools) && !checkAllAliases(key, flags.counts)) { setArg(key, next) i++ } else if (/^(true|false)$/.test(next)) { setArg(key, next) i++ } else { setArg(key, defaultValue(key)) } } } } else if (arg === '--') { notFlags = args.slice(i + 1) break } else if (configuration['halt-at-non-option']) { notFlags = args.slice(i) break } else { argv._.push(maybeCoerceNumber('_', arg)) } } // order of precedence: // 1. command line arg // 2. value from env var // 3. value from config file // 4. value from config objects // 5. configured default value applyEnvVars(argv, true) // special case: check env vars that point to config file applyEnvVars(argv, false) setConfig(argv) setConfigObjects() applyDefaultsAndAliases(argv, flags.aliases, defaults) applyCoercions(argv) if (configuration['set-placeholder-key']) setPlaceholderKeys(argv) // for any counts either not in args or without an explicit default, set to 0 Object.keys(flags.counts).forEach(function (key) { if (!hasKey(argv, key.split('.'))) setArg(key, 0) }) // '--' defaults to undefined. if (notFlagsOption && notFlags.length) argv[notFlagsArgv] = [] notFlags.forEach(function (key) { argv[notFlagsArgv].push(key) }) if (configuration['camel-case-expansion'] && configuration['strip-dashed']) { Object.keys(argv).filter(key => key !== '--' && key.includes('-')).forEach(key => { delete argv[key] }) } if (configuration['strip-aliased']) { // XXX Switch to [].concat(...Object.values(aliases)) once node.js 6 is dropped ;[].concat(...Object.keys(aliases).map(k => aliases[k])).forEach(alias => { if (configuration['camel-case-expansion']) { delete argv[alias.split('.').map(prop => camelCase(prop)).join('.')] } delete argv[alias] }) } // how many arguments should we consume, based // on the nargs option? function eatNargs (i, key, args) { var ii const toEat = checkAllAliases(key, flags.nargs) // nargs will not consume flag arguments, e.g., -abc, --foo, // and terminates when one is observed. var available = 0 for (ii = i + 1; ii < args.length; ii++) { if (!args[ii].match(/^-[^0-9]/)) available++ else break } if (available < toEat) error = Error(__('Not enough arguments following: %s', key)) const consumed = Math.min(available, toEat) for (ii = i + 1; ii < (consumed + i + 1); ii++) { setArg(key, args[ii]) } return (i + consumed) } // if an option is an array, eat all non-hyphenated arguments // following it... YUM! // e.g., --foo apple banana cat becomes ["apple", "banana", "cat"] function eatArray (i, key, args) { var start = i + 1 var argsToSet = [] var multipleArrayFlag = i > 0 for (var ii = i + 1; ii < args.length; ii++) { if (/^-/.test(args[ii]) && !negative.test(args[ii])) { if (ii === start) { setArg(key, defaultForType('array')) } multipleArrayFlag = true break } i = ii argsToSet.push(args[ii]) } if (multipleArrayFlag) { setArg(key, argsToSet.map(function (arg) { return processValue(key, arg) })) } else { argsToSet.forEach(function (arg) { setArg(key, arg) }) } return i } function setArg (key, val) { unsetDefaulted(key) if (/-/.test(key) && configuration['camel-case-expansion']) { var alias = key.split('.').map(function (prop) { return camelCase(prop) }).join('.') addNewAlias(key, alias) } var value = processValue(key, val) var splitKey = key.split('.') setKey(argv, splitKey, value) // handle populating aliases of the full key if (flags.aliases[key] && flags.aliases[key].forEach) { flags.aliases[key].forEach(function (x) { x = x.split('.') setKey(argv, x, value) }) } // handle populating aliases of the first element of the dot-notation key if (splitKey.length > 1 && configuration['dot-notation']) { ;(flags.aliases[splitKey[0]] || []).forEach(function (x) { x = x.split('.') // expand alias with nested objects in key var a = [].concat(splitKey) a.shift() // nuke the old key. x = x.concat(a) setKey(argv, x, value) }) } // Set normalize getter and setter when key is in 'normalize' but isn't an array if (checkAllAliases(key, flags.normalize) && !checkAllAliases(key, flags.arrays)) { var keys = [key].concat(flags.aliases[key] || []) keys.forEach(function (key) { argv.__defineSetter__(key, function (v) { val = path.normalize(v) }) argv.__defineGetter__(key, function () { return typeof val === 'string' ? path.normalize(val) : val }) }) } } function addNewAlias (key, alias) { if (!(flags.aliases[key] && flags.aliases[key].length)) { flags.aliases[key] = [alias] newAliases[alias] = true } if (!(flags.aliases[alias] && flags.aliases[alias].length)) { addNewAlias(alias, key) } } function processValue (key, val) { // strings may be quoted, clean this up as we assign values. if (typeof val === 'string' && (val[0] === "'" || val[0] === '"') && val[val.length - 1] === val[0] ) { val = val.substring(1, val.length - 1) } // handle parsing boolean arguments --foo=true --bar false. if (checkAllAliases(key, flags.bools) || checkAllAliases(key, flags.counts)) { if (typeof val === 'string') val = val === 'true' } var value = maybeCoerceNumber(key, val) // increment a count given as arg (either no value or value parsed as boolean) if (checkAllAliases(key, flags.counts) && (isUndefined(value) || typeof value === 'boolean')) { value = increment } // Set normalized value when key is in 'normalize' and in 'arrays' if (checkAllAliases(key, flags.normalize) && checkAllAliases(key, flags.arrays)) { if (Array.isArray(val)) value = val.map(path.normalize) else value = path.normalize(val) } return value } function maybeCoerceNumber (key, value) { if (!checkAllAliases(key, flags.strings) && !checkAllAliases(key, flags.coercions)) { const shouldCoerceNumber = isNumber(value) && configuration['parse-numbers'] && ( Number.isSafeInteger(Math.floor(value)) ) if (shouldCoerceNumber || (!isUndefined(value) && checkAllAliases(key, flags.numbers))) value = Number(value) } return value } // set args from config.json file, this should be // applied last so that defaults can be applied. function setConfig (argv) { var configLookup = {} // expand defaults/aliases, in-case any happen to reference // the config.json file. applyDefaultsAndAliases(configLookup, flags.aliases, defaults) Object.keys(flags.configs).forEach(function (configKey) { var configPath = argv[configKey] || configLookup[configKey] if (configPath) { try { var config = null var resolvedConfigPath = path.resolve(process.cwd(), configPath) if (typeof flags.configs[configKey] === 'function') { try { config = flags.configs[configKey](resolvedConfigPath) } catch (e) { config = e } if (config instanceof Error) { error = config return } } else { config = require(resolvedConfigPath) } setConfigObject(config) } catch (ex) { if (argv[configKey]) error = Error(__('Invalid JSON config file: %s', configPath)) } } }) } // set args from config object. // it recursively checks nested objects. function setConfigObject (config, prev) { Object.keys(config).forEach(function (key) { var value = config[key] var fullKey = prev ? prev + '.' + key : key // if the value is an inner object and we have dot-notation // enabled, treat inner objects in config the same as // heavily nested dot notations (foo.bar.apple). if (typeof value === 'object' && value !== null && !Array.isArray(value) && configuration['dot-notation']) { // if the value is an object but not an array, check nested object setConfigObject(value, fullKey) } else { // setting arguments via CLI takes precedence over // values within the config file. if (!hasKey(argv, fullKey.split('.')) || (flags.defaulted[fullKey]) || (flags.arrays[fullKey] && configuration['combine-arrays'])) { setArg(fullKey, value) } } }) } // set all config objects passed in opts function setConfigObjects () { if (typeof configObjects === 'undefined') return configObjects.forEach(function (configObject) { setConfigObject(configObject) }) } function applyEnvVars (argv, configOnly) { if (typeof envPrefix === 'undefined') return var prefix = typeof envPrefix === 'string' ? envPrefix : '' Object.keys(process.env).forEach(function (envVar) { if (prefix === '' || envVar.lastIndexOf(prefix, 0) === 0) { // get array of nested keys and convert them to camel case var keys = envVar.split('__').map(function (key, i) { if (i === 0) { key = key.substring(prefix.length) } return camelCase(key) }) if (((configOnly && flags.configs[keys.join('.')]) || !configOnly) && (!hasKey(argv, keys) || flags.defaulted[keys.join('.')])) { setArg(keys.join('.'), process.env[envVar]) } } }) } function applyCoercions (argv) { var coerce var applied = {} Object.keys(argv).forEach(function (key) { if (!applied.hasOwnProperty(key)) { // If we haven't already coerced this option via one of its aliases coerce = checkAllAliases(key, flags.coercions) if (typeof coerce === 'function') { try { var value = coerce(argv[key]) ;([].concat(flags.aliases[key] || [], key)).forEach(ali => { applied[ali] = argv[ali] = value }) } catch (err) { error = err } } } }) } function setPlaceholderKeys (argv) { flags.keys.forEach((key) => { // don't set placeholder keys for dot notation options 'foo.bar'. if (~key.indexOf('.')) return if (typeof argv[key] === 'undefined') argv[key] = undefined }) return argv } function applyDefaultsAndAliases (obj, aliases, defaults) { Object.keys(defaults).forEach(function (key) { if (!hasKey(obj, key.split('.'))) { setKey(obj, key.split('.'), defaults[key]) ;(aliases[key] || []).forEach(function (x) { if (hasKey(obj, x.split('.'))) return setKey(obj, x.split('.'), defaults[key]) }) } }) } function hasKey (obj, keys) { var o = obj if (!configuration['dot-notation']) keys = [keys.join('.')] keys.slice(0, -1).forEach(function (key) { o = (o[key] || {}) }) var key = keys[keys.length - 1] if (typeof o !== 'object') return false else return key in o } function setKey (obj, keys, value) { var o = obj if (!configuration['dot-notation']) keys = [keys.join('.')] keys.slice(0, -1).forEach(function (key, index) { // TODO(bcoe): in the next major version of yargs, switch to // Object.create(null) for dot notation: key = sanitizeKey(key) if (typeof o === 'object' && o[key] === undefined) { o[key] = {} } if (typeof o[key] !== 'object' || Array.isArray(o[key])) { // ensure that o[key] is an array, and that the last item is an empty object. if (Array.isArray(o[key])) { o[key].push({}) } else { o[key] = [o[key], {}] } // we want to update the empty object at the end of the o[key] array, so set o to that object o = o[key][o[key].length - 1] } else { o = o[key] } }) // TODO(bcoe): in the next major version of yargs, switch to // Object.create(null) for dot notation: const key = sanitizeKey(keys[keys.length - 1]) const isTypeArray = checkAllAliases(keys.join('.'), flags.arrays) const isValueArray = Array.isArray(value) let duplicate = configuration['duplicate-arguments-array'] // nargs has higher priority than duplicate if (!duplicate && checkAllAliases(key, flags.nargs)) { duplicate = true if ((!isUndefined(o[key]) && flags.nargs[key] === 1) || (Array.isArray(o[key]) && o[key].length === flags.nargs[key])) { o[key] = undefined } } if (value === increment) { o[key] = increment(o[key]) } else if (Array.isArray(o[key])) { if (duplicate && isTypeArray && isValueArray) { o[key] = configuration['flatten-duplicate-arrays'] ? o[key].concat(value) : (Array.isArray(o[key][0]) ? o[key] : [o[key]]).concat([value]) } else if (!duplicate && Boolean(isTypeArray) === Boolean(isValueArray)) { o[key] = value } else { o[key] = o[key].concat([value]) } } else if (o[key] === undefined && isTypeArray) { o[key] = isValueArray ? value : [value] } else if (duplicate && !(o[key] === undefined || checkAllAliases(key, flags.bools) || checkAllAliases(keys.join('.'), flags.bools) || checkAllAliases(key, flags.counts))) { o[key] = [ o[key], value ] } else { o[key] = value } } // extend the aliases list with inferred aliases. function extendAliases (...args) { args.forEach(function (obj) { Object.keys(obj || {}).forEach(function (key) { // short-circuit if we've already added a key // to the aliases array, for example it might // exist in both 'opts.default' and 'opts.key'. if (flags.aliases[key]) return flags.aliases[key] = [].concat(aliases[key] || []) // For "--option-name", also set argv.optionName flags.aliases[key].concat(key).forEach(function (x) { if (/-/.test(x) && configuration['camel-case-expansion']) { var c = camelCase(x) if (c !== key && flags.aliases[key].indexOf(c) === -1) { flags.aliases[key].push(c) newAliases[c] = true } } }) // For "--optionName", also set argv['option-name'] flags.aliases[key].concat(key).forEach(function (x) { if (x.length > 1 && /[A-Z]/.test(x) && configuration['camel-case-expansion']) { var c = decamelize(x, '-') if (c !== key && flags.aliases[key].indexOf(c) === -1) { flags.aliases[key].push(c) newAliases[c] = true } } }) flags.aliases[key].forEach(function (x) { flags.aliases[x] = [key].concat(flags.aliases[key].filter(function (y) { return x !== y })) }) }) }) } // check if a flag is set for any of a key's aliases. function checkAllAliases (key, flag) { var isSet = false var toCheck = [].concat(flags.aliases[key] || [], key) toCheck.forEach(function (key) { if (flag[key]) isSet = flag[key] }) return isSet } function setDefaulted (key) { [].concat(flags.aliases[key] || [], key).forEach(function (k) { flags.defaulted[k] = true }) } function unsetDefaulted (key) { [].concat(flags.aliases[key] || [], key).forEach(function (k) { delete flags.defaulted[k] }) } // make a best effor to pick a default value // for an option based on name and type. function defaultValue (key) { if (!checkAllAliases(key, flags.bools) && !checkAllAliases(key, flags.counts) && `${key}` in defaults) { return defaults[key] } else { return defaultForType(guessType(key)) } } // return a default value, given the type of a flag., // e.g., key of type 'string' will default to '', rather than 'true'. function defaultForType (type) { var def = { boolean: true, string: '', number: undefined, array: [] } return def[type] } // given a flag, enforce a default type. function guessType (key) { var type = 'boolean' if (checkAllAliases(key, flags.strings)) type = 'string' else if (checkAllAliases(key, flags.numbers)) type = 'number' else if (checkAllAliases(key, flags.arrays)) type = 'array' return type } function isNumber (x) { if (x === null || x === undefined) return false // if loaded from config, may already be a number. if (typeof x === 'number') return true // hexadecimal. if (/^0x[0-9a-f]+$/i.test(x)) return true // don't treat 0123 as a number; as it drops the leading '0'. if (x.length > 1 && x[0] === '0') return false return /^[-]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/.test(x) } function isUndefined (num) { return num === undefined } return { argv: argv, error: error, aliases: flags.aliases, newAliases: newAliases, configuration: configuration } } // if any aliases reference each other, we should // merge them together. function combineAliases (aliases) { var aliasArrays = [] var change = true var combined = {} // turn alias lookup hash {key: ['alias1', 'alias2']} into // a simple array ['key', 'alias1', 'alias2'] Object.keys(aliases).forEach(function (key) { aliasArrays.push( [].concat(aliases[key], key) ) }) // combine arrays until zero changes are // made in an iteration. while (change) { change = false for (var i = 0; i < aliasArrays.length; i++) { for (var ii = i + 1; ii < aliasArrays.length; ii++) { var intersect = aliasArrays[i].filter(function (v) { return aliasArrays[ii].indexOf(v) !== -1 }) if (intersect.length) { aliasArrays[i] = aliasArrays[i].concat(aliasArrays[ii]) aliasArrays.splice(ii, 1) change = true break } } } } // map arrays back to the hash-lookup (de-dupe while // we're at it). aliasArrays.forEach(function (aliasArray) { aliasArray = aliasArray.filter(function (v, i, self) { return self.indexOf(v) === i }) combined[aliasArray.pop()] = aliasArray }) return combined } // this function should only be called when a count is given as an arg // it is NOT called to set a default value // thus we can start the count at 1 instead of 0 function increment (orig) { return orig !== undefined ? orig + 1 : 1 } function Parser (args, opts) { var result = parse(args.slice(), opts) return result.argv } // parse arguments and return detailed // meta information, aliases, etc. Parser.detailed = function (args, opts) { return parse(args.slice(), opts) } // TODO(bcoe): in the next major version of yargs, switch to // Object.create(null) for dot notation: function sanitizeKey (key) { if (key === '__proto__') return '___proto___' return key } module.exports = Parser