1 // fancy-pants parsing of argv, originally forked
2 // from minimist: https://www.npmjs.com/package/minimist
3 var camelCase = require('camelcase')
4 var path = require('path')
6 function increment (orig) {
7 return orig !== undefined ? orig + 1 : 0
10 module.exports = function (args, opts, y18n) {
15 var flags = { arrays: {}, bools: {}, strings: {}, counts: {}, normalize: {}, configs: {}, defaulted: {} }
17 ;[].concat(opts['array']).filter(Boolean).forEach(function (key) {
18 flags.arrays[key] = true
21 ;[].concat(opts['boolean']).filter(Boolean).forEach(function (key) {
22 flags.bools[key] = true
25 ;[].concat(opts.string).filter(Boolean).forEach(function (key) {
26 flags.strings[key] = true
29 ;[].concat(opts.count).filter(Boolean).forEach(function (key) {
30 flags.counts[key] = true
33 ;[].concat(opts.normalize).filter(Boolean).forEach(function (key) {
34 flags.normalize[key] = true
37 Object.keys(opts.config).forEach(function (k) {
38 flags.configs[k] = opts.config[k]
44 extendAliases(opts.key)
45 extendAliases(opts.alias)
46 extendAliases(opts.default)
48 var defaults = opts['default'] || {}
49 Object.keys(defaults).forEach(function (key) {
50 if (/-/.test(key) && !opts.alias[key]) {
51 aliases[key] = aliases[key] || []
53 (aliases[key] || []).forEach(function (alias) {
54 defaults[alias] = defaults[key]
60 Object.keys(flags.bools).forEach(function (key) {
61 setArg(key, !(key in defaults) ? false : defaults[key])
66 if (args.indexOf('--') !== -1) {
67 notFlags = args.slice(args.indexOf('--') + 1)
68 args = args.slice(0, args.indexOf('--'))
71 for (var i = 0; i < args.length; i++) {
81 if (arg.match(/^--.+=/)) {
82 // Using [\s\S] instead of . because js doesn't support the
83 // 'dotall' regex modifier. See:
84 // http://stackoverflow.com/a/1068308/13216
85 m = arg.match(/^--([^=]+)=([\s\S]*)$/)
87 // nargs format = '--f=monkey washing cat'
88 if (checkAllAliases(m[1], opts.narg)) {
89 args.splice(i + 1, m[1], m[2])
90 i = eatNargs(i, m[1], args)
91 // arrays format = '--f=a b c'
92 } else if (checkAllAliases(m[1], flags.arrays) && args.length > i + 1) {
93 args.splice(i + 1, m[1], m[2])
94 i = eatArray(i, m[1], args)
98 } else if (arg.match(/^--no-.+/)) {
99 key = arg.match(/^--no-(.+)/)[1]
102 // -- seperated by space.
103 } else if (arg.match(/^--.+/)) {
104 key = arg.match(/^--(.+)/)[1]
106 // nargs format = '--foo a b c'
107 if (checkAllAliases(key, opts.narg)) {
108 i = eatNargs(i, key, args)
109 // array format = '--foo a b c'
110 } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
111 i = eatArray(i, key, args)
115 if (next !== undefined && !next.match(/^-/) &&
116 !checkAllAliases(key, flags.bools) &&
117 !checkAllAliases(key, flags.counts)) {
120 } else if (/^(true|false)$/.test(next)) {
124 setArg(key, defaultForType(guessType(key, flags)))
128 // dot-notation flag seperated by '='.
129 } else if (arg.match(/^-.\..+=/)) {
130 m = arg.match(/^-([^=]+)=([\s\S]*)$/)
133 // dot-notation flag seperated by space.
134 } else if (arg.match(/^-.\..+/)) {
136 key = arg.match(/^-(.\..+)/)[1]
138 if (next !== undefined && !next.match(/^-/) &&
139 !checkAllAliases(key, flags.bools) &&
140 !checkAllAliases(key, flags.counts)) {
144 setArg(key, defaultForType(guessType(key, flags)))
146 } else if (arg.match(/^-[^-]+/)) {
147 letters = arg.slice(1, -1).split('')
150 for (var j = 0; j < letters.length; j++) {
151 next = arg.slice(j + 2)
153 if (letters[j + 1] && letters[j + 1] === '=') {
154 value = arg.slice(j + 3)
157 // nargs format = '-f=monkey washing cat'
158 if (checkAllAliases(letters[j], opts.narg)) {
159 args.splice(i + 1, 0, value)
160 i = eatNargs(i, key, args)
161 // array format = '-f=a b c'
162 } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
163 args.splice(i + 1, 0, value)
164 i = eatArray(i, key, args)
174 setArg(letters[j], next)
178 if (/[A-Za-z]/.test(letters[j]) &&
179 /-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) {
180 setArg(letters[j], next)
185 if (letters[j + 1] && letters[j + 1].match(/\W/)) {
186 setArg(letters[j], arg.slice(j + 2))
190 setArg(letters[j], defaultForType(guessType(letters[j], flags)))
194 key = arg.slice(-1)[0]
196 if (!broken && key !== '-') {
197 // nargs format = '-f a b c'
198 if (checkAllAliases(key, opts.narg)) {
199 i = eatNargs(i, key, args)
200 // array format = '-f a b c'
201 } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
202 i = eatArray(i, key, args)
204 if (args[i + 1] && !/^(-|--)[^-]/.test(args[i + 1]) &&
205 !checkAllAliases(key, flags.bools) &&
206 !checkAllAliases(key, flags.counts)) {
207 setArg(key, args[i + 1])
209 } else if (args[i + 1] && /true|false/.test(args[i + 1])) {
210 setArg(key, args[i + 1])
213 setArg(key, defaultForType(guessType(key, flags)))
219 flags.strings['_'] || !isNumber(arg) ? arg : Number(arg)
224 // order of precedence:
225 // 1. command line arg
226 // 2. value from config file
227 // 3. value from env var
228 // 4. configured default value
229 applyEnvVars(opts, argv, true) // special case: check env vars that point to config file
231 applyEnvVars(opts, argv, false)
232 applyDefaultsAndAliases(argv, aliases, defaults)
234 Object.keys(flags.counts).forEach(function (key) {
235 setArg(key, defaults[key])
238 notFlags.forEach(function (key) {
242 // how many arguments should we consume, based
243 // on the nargs option?
244 function eatNargs (i, key, args) {
245 var toEat = checkAllAliases(key, opts.narg)
247 if (args.length - (i + 1) < toEat) error = Error(__('Not enough arguments following: %s', key))
249 for (var ii = i + 1; ii < (toEat + i + 1); ii++) {
250 setArg(key, args[ii])
256 // if an option is an array, eat all non-hyphenated arguments
257 // following it... YUM!
258 // e.g., --foo apple banana cat becomes ["apple", "banana", "cat"]
259 function eatArray (i, key, args) {
260 for (var ii = i + 1; ii < args.length; ii++) {
261 if (/^-/.test(args[ii])) break
263 setArg(key, args[ii])
269 function setArg (key, val) {
272 // handle parsing boolean arguments --foo=true --bar false.
273 if (checkAllAliases(key, flags.bools) || checkAllAliases(key, flags.counts)) {
274 if (typeof val === 'string') val = val === 'true'
277 if (/-/.test(key) && !(aliases[key] && aliases[key].length)) {
278 var c = camelCase(key)
283 var value = !checkAllAliases(key, flags.strings) && isNumber(val) ? Number(val) : val
285 if (checkAllAliases(key, flags.counts)) {
289 var splitKey = key.split('.')
290 setKey(argv, splitKey, value)
292 // alias references an inner-value within
293 // a dot-notation object. see #279.
294 if (~key.indexOf('.') && aliases[key]) {
295 aliases[key].forEach(function (x) {
297 setKey(argv, x, value)
301 ;(aliases[splitKey[0]] || []).forEach(function (x) {
304 // handle populating dot notation for both
305 // the key and its aliases.
306 if (splitKey.length > 1) {
307 var a = [].concat(splitKey)
308 a.shift() // nuke the old key.
312 setKey(argv, x, value)
315 var keys = [key].concat(aliases[key] || [])
316 for (var i = 0, l = keys.length; i < l; i++) {
317 if (flags.normalize[keys[i]]) {
318 keys.forEach(function (key) {
319 argv.__defineSetter__(key, function (v) {
320 val = path.normalize(v)
323 argv.__defineGetter__(key, function () {
324 return typeof val === 'string' ? path.normalize(val) : val
332 // set args from config.json file, this should be
333 // applied last so that defaults can be applied.
334 function setConfig (argv) {
335 var configLookup = {}
337 // expand defaults/aliases, in-case any happen to reference
338 // the config.json file.
339 applyDefaultsAndAliases(configLookup, aliases, defaults)
341 Object.keys(flags.configs).forEach(function (configKey) {
342 var configPath = argv[configKey] || configLookup[configKey]
346 var resolvedConfigPath = path.resolve(process.cwd(), configPath)
348 if (typeof flags.configs[configKey] === 'function') {
350 config = flags.configs[configKey](resolvedConfigPath)
354 if (config instanceof Error) {
359 config = require(resolvedConfigPath)
362 Object.keys(config).forEach(function (key) {
363 // setting arguments via CLI takes precedence over
364 // values within the config file.
365 if (argv[key] === undefined || (flags.defaulted[key])) {
367 setArg(key, config[key])
371 if (argv[configKey]) error = Error(__('Invalid JSON config file: %s', configPath))
377 function applyEnvVars (opts, argv, configOnly) {
378 if (typeof opts.envPrefix === 'undefined') return
380 var prefix = typeof opts.envPrefix === 'string' ? opts.envPrefix : ''
381 Object.keys(process.env).forEach(function (envVar) {
382 if (prefix === '' || envVar.lastIndexOf(prefix, 0) === 0) {
383 var key = camelCase(envVar.substring(prefix.length))
384 if (((configOnly && flags.configs[key]) || !configOnly) && (!(key in argv) || flags.defaulted[key])) {
385 setArg(key, process.env[envVar])
391 function applyDefaultsAndAliases (obj, aliases, defaults) {
392 Object.keys(defaults).forEach(function (key) {
393 if (!hasKey(obj, key.split('.'))) {
394 setKey(obj, key.split('.'), defaults[key])
396 ;(aliases[key] || []).forEach(function (x) {
397 if (hasKey(obj, x.split('.'))) return
398 setKey(obj, x.split('.'), defaults[key])
404 function hasKey (obj, keys) {
406 keys.slice(0, -1).forEach(function (key) {
410 var key = keys[keys.length - 1]
412 if (typeof o !== 'object') return false
416 function setKey (obj, keys, value) {
418 keys.slice(0, -1).forEach(function (key) {
419 if (o[key] === undefined) o[key] = {}
423 var key = keys[keys.length - 1]
424 if (value === increment) {
425 o[key] = increment(o[key])
426 } else if (o[key] === undefined && checkAllAliases(key, flags.arrays)) {
427 o[key] = Array.isArray(value) ? value : [value]
428 } else if (o[key] === undefined || typeof o[key] === 'boolean') {
430 } else if (Array.isArray(o[key])) {
433 o[key] = [ o[key], value ]
437 // extend the aliases list with inferred aliases.
438 function extendAliases (obj) {
439 Object.keys(obj || {}).forEach(function (key) {
440 // short-circuit if we've already added a key
441 // to the aliases array, for example it might
442 // exist in both 'opts.default' and 'opts.key'.
443 if (aliases[key]) return
445 aliases[key] = [].concat(opts.alias[key] || [])
446 // For "--option-name", also set argv.optionName
447 aliases[key].concat(key).forEach(function (x) {
454 aliases[key].forEach(function (x) {
455 aliases[x] = [key].concat(aliases[key].filter(function (y) {
462 // check if a flag is set for any of a key's aliases.
463 function checkAllAliases (key, flag) {
465 var toCheck = [].concat(aliases[key] || [], key)
467 toCheck.forEach(function (key) {
468 if (flag[key]) isSet = flag[key]
474 function setDefaulted (key) {
475 [].concat(aliases[key] || [], key).forEach(function (k) {
476 flags.defaulted[k] = true
480 function unsetDefaulted (key) {
481 [].concat(aliases[key] || [], key).forEach(function (k) {
482 delete flags.defaulted[k]
486 // return a default value, given the type of a flag.,
487 // e.g., key of type 'string' will default to '', rather than 'true'.
488 function defaultForType (type) {
498 // given a flag, enforce a default type.
499 function guessType (key, flags) {
502 if (flags.strings && flags.strings[key]) type = 'string'
503 else if (flags.arrays && flags.arrays[key]) type = 'array'
508 function isNumber (x) {
509 if (typeof x === 'number') return true
510 if (/^0x[0-9a-f]+$/i.test(x)) return true
511 return /^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/.test(x)
518 newAliases: newAliases