luhn-generator
Version:
A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm
1,216 lines (1,031 loc) • 37.5 kB
JavaScript
const argsert = require('./lib/argsert')
const fs = require('fs')
const Command = require('./lib/command')
const Completion = require('./lib/completion')
const Parser = require('yargs-parser')
const path = require('path')
const Usage = require('./lib/usage')
const Validation = require('./lib/validation')
const Y18n = require('y18n')
const objFilter = require('./lib/obj-filter')
const setBlocking = require('set-blocking')
const applyExtends = require('./lib/apply-extends')
const { globalMiddlewareFactory } = require('./lib/middleware')
const YError = require('./lib/yerror')
exports = module.exports = Yargs
function Yargs (processArgs, cwd, parentRequire) {
processArgs = processArgs || [] // handle calling yargs().
const self = {}
let command = null
let completion = null
let groups = {}
let globalMiddleware = []
let output = ''
let preservedGroups = {}
let usage = null
let validation = null
const y18n = Y18n({
directory: path.resolve(__dirname, './locales'),
updateFiles: false
})
self.middleware = globalMiddlewareFactory(globalMiddleware, self)
if (!cwd) cwd = process.cwd()
self.scriptName = function scriptName (scriptName) {
self.$0 = scriptName
return self
}
// ignore the node bin, specify this in your
// bin file with #!/usr/bin/env node
if (/\b(node|iojs|electron)(\.exe)?$/.test(process.argv[0])) {
self.$0 = process.argv.slice(1, 2)
} else {
self.$0 = process.argv.slice(0, 1)
}
self.$0 = self.$0
.map((x, i) => {
const b = rebase(cwd, x)
return x.match(/^(\/|([a-zA-Z]:)?\\)/) && b.length < x.length ? b : x
})
.join(' ').trim()
if (process.env._ !== undefined && process.argv[1] === process.env._) {
self.$0 = process.env._.replace(
`${path.dirname(process.execPath)}/`, ''
)
}
// use context object to keep track of resets, subcommand execution, etc
// submodules should modify and check the state of context as necessary
const context = { resets: -1, commands: [], fullCommands: [], files: [] }
self.getContext = () => context
// puts yargs back into an initial state. any keys
// that have been set to "global" will not be reset
// by this action.
let options
self.resetOptions = self.reset = function resetOptions (aliases) {
context.resets++
aliases = aliases || {}
options = options || {}
// put yargs back into an initial state, this
// logic is used to build a nested command
// hierarchy.
const tmpOptions = {}
tmpOptions.local = options.local ? options.local : []
tmpOptions.configObjects = options.configObjects ? options.configObjects : []
// if a key has been explicitly set as local,
// we should reset it before passing options to command.
const localLookup = {}
tmpOptions.local.forEach((l) => {
localLookup[l] = true
;(aliases[l] || []).forEach((a) => {
localLookup[a] = true
})
})
// preserve all groups not set to local.
preservedGroups = Object.keys(groups).reduce((acc, groupName) => {
const keys = groups[groupName].filter(key => !(key in localLookup))
if (keys.length > 0) {
acc[groupName] = keys
}
return acc
}, {})
// groups can now be reset
groups = {}
const arrayOptions = [
'array', 'boolean', 'string', 'skipValidation',
'count', 'normalize', 'number',
'hiddenOptions'
]
const objectOptions = [
'narg', 'key', 'alias', 'default', 'defaultDescription',
'config', 'choices', 'demandedOptions', 'demandedCommands', 'coerce'
]
arrayOptions.forEach((k) => {
tmpOptions[k] = (options[k] || []).filter(k => !localLookup[k])
})
objectOptions.forEach((k) => {
tmpOptions[k] = objFilter(options[k], (k, v) => !localLookup[k])
})
tmpOptions.envPrefix = options.envPrefix
options = tmpOptions
// if this is the first time being executed, create
// instances of all our helpers -- otherwise just reset.
usage = usage ? usage.reset(localLookup) : Usage(self, y18n)
validation = validation ? validation.reset(localLookup) : Validation(self, usage, y18n)
command = command ? command.reset() : Command(self, usage, validation, globalMiddleware)
if (!completion) completion = Completion(self, usage, command)
completionCommand = null
output = ''
exitError = null
hasOutput = false
self.parsed = false
return self
}
self.resetOptions()
// temporary hack: allow "freezing" of reset-able state for parse(msg, cb)
let frozen
function freeze () {
frozen = {}
frozen.options = options
frozen.configObjects = options.configObjects.slice(0)
frozen.exitProcess = exitProcess
frozen.groups = groups
usage.freeze()
validation.freeze()
command.freeze()
frozen.strict = strict
frozen.completionCommand = completionCommand
frozen.output = output
frozen.exitError = exitError
frozen.hasOutput = hasOutput
frozen.parsed = self.parsed
}
function unfreeze () {
options = frozen.options
options.configObjects = frozen.configObjects
exitProcess = frozen.exitProcess
groups = frozen.groups
output = frozen.output
exitError = frozen.exitError
hasOutput = frozen.hasOutput
self.parsed = frozen.parsed
usage.unfreeze()
validation.unfreeze()
command.unfreeze()
strict = frozen.strict
completionCommand = frozen.completionCommand
parseFn = null
parseContext = null
frozen = undefined
}
self.boolean = function (keys) {
argsert('<array|string>', [keys], arguments.length)
populateParserHintArray('boolean', keys)
return self
}
self.array = function (keys) {
argsert('<array|string>', [keys], arguments.length)
populateParserHintArray('array', keys)
return self
}
self.number = function (keys) {
argsert('<array|string>', [keys], arguments.length)
populateParserHintArray('number', keys)
return self
}
self.normalize = function (keys) {
argsert('<array|string>', [keys], arguments.length)
populateParserHintArray('normalize', keys)
return self
}
self.count = function (keys) {
argsert('<array|string>', [keys], arguments.length)
populateParserHintArray('count', keys)
return self
}
self.string = function (keys) {
argsert('<array|string>', [keys], arguments.length)
populateParserHintArray('string', keys)
return self
}
self.requiresArg = function (keys) {
argsert('<array|string>', [keys], arguments.length)
populateParserHintObject(self.nargs, false, 'narg', keys, 1)
return self
}
self.skipValidation = function (keys) {
argsert('<array|string>', [keys], arguments.length)
populateParserHintArray('skipValidation', keys)
return self
}
function populateParserHintArray (type, keys, value) {
keys = [].concat(keys)
keys.forEach((key) => {
key = sanitizeKey(key)
options[type].push(key)
})
}
self.nargs = function (key, value) {
argsert('<string|object|array> [number]', [key, value], arguments.length)
populateParserHintObject(self.nargs, false, 'narg', key, value)
return self
}
self.choices = function (key, value) {
argsert('<object|string|array> [string|array]', [key, value], arguments.length)
populateParserHintObject(self.choices, true, 'choices', key, value)
return self
}
self.alias = function (key, value) {
argsert('<object|string|array> [string|array]', [key, value], arguments.length)
populateParserHintObject(self.alias, true, 'alias', key, value)
return self
}
// TODO: actually deprecate self.defaults.
self.default = self.defaults = function (key, value, defaultDescription) {
argsert('<object|string|array> [*] [string]', [key, value, defaultDescription], arguments.length)
if (defaultDescription) options.defaultDescription[key] = defaultDescription
if (typeof value === 'function') {
if (!options.defaultDescription[key]) options.defaultDescription[key] = usage.functionDescription(value)
value = value.call()
}
populateParserHintObject(self.default, false, 'default', key, value)
return self
}
self.describe = function (key, desc) {
argsert('<object|string|array> [string]', [key, desc], arguments.length)
populateParserHintObject(self.describe, false, 'key', key, true)
usage.describe(key, desc)
return self
}
self.demandOption = function (keys, msg) {
argsert('<object|string|array> [string]', [keys, msg], arguments.length)
populateParserHintObject(self.demandOption, false, 'demandedOptions', keys, msg)
return self
}
self.coerce = function (keys, value) {
argsert('<object|string|array> [function]', [keys, value], arguments.length)
populateParserHintObject(self.coerce, false, 'coerce', keys, value)
return self
}
function populateParserHintObject (builder, isArray, type, key, value) {
if (Array.isArray(key)) {
const temp = Object.create(null)
// an array of keys with one value ['x', 'y', 'z'], function parse () {}
key.forEach((k) => {
temp[k] = value
})
builder(temp)
} else if (typeof key === 'object') {
// an object of key value pairs: {'x': parse () {}, 'y': parse() {}}
Object.keys(key).forEach((k) => {
builder(k, key[k])
})
} else {
key = sanitizeKey(key)
// a single key value pair 'x', parse() {}
if (isArray) {
options[type][key] = (options[type][key] || []).concat(value)
} else {
options[type][key] = value
}
}
}
// TODO(bcoe): in future major versions move more objects towards
// Object.create(null):
function sanitizeKey (key) {
if (key === '__proto__') return '___proto___'
return key
}
function deleteFromParserHintObject (optionKey) {
// delete from all parsing hints:
// boolean, array, key, alias, etc.
Object.keys(options).forEach((hintKey) => {
const hint = options[hintKey]
if (Array.isArray(hint)) {
if (~hint.indexOf(optionKey)) hint.splice(hint.indexOf(optionKey), 1)
} else if (typeof hint === 'object') {
delete hint[optionKey]
}
})
// now delete the description from usage.js.
delete usage.getDescriptions()[optionKey]
}
self.config = function config (key, msg, parseFn) {
argsert('[object|string] [string|function] [function]', [key, msg, parseFn], arguments.length)
// allow a config object to be provided directly.
if (typeof key === 'object') {
key = applyExtends(key, cwd)
options.configObjects = (options.configObjects || []).concat(key)
return self
}
// allow for a custom parsing function.
if (typeof msg === 'function') {
parseFn = msg
msg = null
}
key = key || 'config'
self.describe(key, msg || usage.deferY18nLookup('Path to JSON config file'))
;(Array.isArray(key) ? key : [key]).forEach((k) => {
options.config[k] = parseFn || true
})
return self
}
self.example = function (cmd, description) {
argsert('<string> [string]', [cmd, description], arguments.length)
usage.example(cmd, description)
return self
}
self.command = function (cmd, description, builder, handler, middlewares) {
argsert('<string|array|object> [string|boolean] [function|object] [function] [array]', [cmd, description, builder, handler, middlewares], arguments.length)
command.addHandler(cmd, description, builder, handler, middlewares)
return self
}
self.commandDir = function (dir, opts) {
argsert('<string> [object]', [dir, opts], arguments.length)
const req = parentRequire || require
command.addDirectory(dir, self.getContext(), req, require('get-caller-file')(), opts)
return self
}
// TODO: deprecate self.demand in favor of
// .demandCommand() .demandOption().
self.demand = self.required = self.require = function demand (keys, max, msg) {
// you can optionally provide a 'max' key,
// which will raise an exception if too many '_'
// options are provided.
if (Array.isArray(max)) {
max.forEach((key) => {
self.demandOption(key, msg)
})
max = Infinity
} else if (typeof max !== 'number') {
msg = max
max = Infinity
}
if (typeof keys === 'number') {
self.demandCommand(keys, max, msg, msg)
} else if (Array.isArray(keys)) {
keys.forEach((key) => {
self.demandOption(key, msg)
})
} else {
if (typeof msg === 'string') {
self.demandOption(keys, msg)
} else if (msg === true || typeof msg === 'undefined') {
self.demandOption(keys)
}
}
return self
}
self.demandCommand = function demandCommand (min, max, minMsg, maxMsg) {
argsert('[number] [number|string] [string|null|undefined] [string|null|undefined]', [min, max, minMsg, maxMsg], arguments.length)
if (typeof min === 'undefined') min = 1
if (typeof max !== 'number') {
minMsg = max
max = Infinity
}
self.global('_', false)
options.demandedCommands._ = {
min,
max,
minMsg,
maxMsg
}
return self
}
self.getDemandedOptions = () => {
argsert([], 0)
return options.demandedOptions
}
self.getDemandedCommands = () => {
argsert([], 0)
return options.demandedCommands
}
self.implies = function (key, value) {
argsert('<string|object> [number|string|array]', [key, value], arguments.length)
validation.implies(key, value)
return self
}
self.conflicts = function (key1, key2) {
argsert('<string|object> [string|array]', [key1, key2], arguments.length)
validation.conflicts(key1, key2)
return self
}
self.usage = function (msg, description, builder, handler) {
argsert('<string|null|undefined> [string|boolean] [function|object] [function]', [msg, description, builder, handler], arguments.length)
if (description !== undefined) {
// .usage() can be used as an alias for defining
// a default command.
if ((msg || '').match(/^\$0( |$)/)) {
return self.command(msg, description, builder, handler)
} else {
throw new YError('.usage() description must start with $0 if being used as alias for .command()')
}
} else {
usage.usage(msg)
return self
}
}
self.epilogue = self.epilog = function (msg) {
argsert('<string>', [msg], arguments.length)
usage.epilog(msg)
return self
}
self.fail = function (f) {
argsert('<function>', [f], arguments.length)
usage.failFn(f)
return self
}
self.check = function (f, _global) {
argsert('<function> [boolean]', [f, _global], arguments.length)
validation.check(f, _global !== false)
return self
}
self.global = function global (globals, global) {
argsert('<string|array> [boolean]', [globals, global], arguments.length)
globals = [].concat(globals)
if (global !== false) {
options.local = options.local.filter(l => globals.indexOf(l) === -1)
} else {
globals.forEach((g) => {
if (options.local.indexOf(g) === -1) options.local.push(g)
})
}
return self
}
self.pkgConf = function pkgConf (key, rootPath) {
argsert('<string> [string]', [key, rootPath], arguments.length)
let conf = null
// prefer cwd to require-main-filename in this method
// since we're looking for e.g. "nyc" config in nyc consumer
// rather than "yargs" config in nyc (where nyc is the main filename)
const obj = pkgUp(rootPath || cwd)
// If an object exists in the key, add it to options.configObjects
if (obj[key] && typeof obj[key] === 'object') {
conf = applyExtends(obj[key], rootPath || cwd)
options.configObjects = (options.configObjects || []).concat(conf)
}
return self
}
const pkgs = {}
function pkgUp (rootPath) {
const npath = rootPath || '*'
if (pkgs[npath]) return pkgs[npath]
const findUp = require('find-up')
let obj = {}
try {
let startDir = rootPath || require('require-main-filename')(parentRequire || require)
// When called in an environment that lacks require.main.filename, such as a jest test runner,
// startDir is already process.cwd(), and should not be shortened.
// Whether or not it is _actually_ a directory (e.g., extensionless bin) is irrelevant, find-up handles it.
if (!rootPath && path.extname(startDir)) {
startDir = path.dirname(startDir)
}
const pkgJsonPath = findUp.sync('package.json', {
cwd: startDir
})
obj = JSON.parse(fs.readFileSync(pkgJsonPath))
} catch (noop) {}
pkgs[npath] = obj || {}
return pkgs[npath]
}
let parseFn = null
let parseContext = null
self.parse = function parse (args, shortCircuit, _parseFn) {
argsert('[string|array] [function|boolean|object] [function]', [args, shortCircuit, _parseFn], arguments.length)
if (typeof args === 'undefined') {
return self._parseArgs(processArgs)
}
// a context object can optionally be provided, this allows
// additional information to be passed to a command handler.
if (typeof shortCircuit === 'object') {
parseContext = shortCircuit
shortCircuit = _parseFn
}
// by providing a function as a second argument to
// parse you can capture output that would otherwise
// default to printing to stdout/stderr.
if (typeof shortCircuit === 'function') {
parseFn = shortCircuit
shortCircuit = null
}
// completion short-circuits the parsing process,
// skipping validation, etc.
if (!shortCircuit) processArgs = args
freeze()
if (parseFn) exitProcess = false
const parsed = self._parseArgs(args, shortCircuit)
if (parseFn) parseFn(exitError, parsed, output)
unfreeze()
return parsed
}
self._getParseContext = () => parseContext || {}
self._hasParseCallback = () => !!parseFn
self.option = self.options = function option (key, opt) {
argsert('<string|object> [object]', [key, opt], arguments.length)
if (typeof key === 'object') {
Object.keys(key).forEach((k) => {
self.options(k, key[k])
})
} else {
if (typeof opt !== 'object') {
opt = {}
}
options.key[key] = true // track manually set keys.
if (opt.alias) self.alias(key, opt.alias)
const demand = opt.demand || opt.required || opt.require
// deprecated, use 'demandOption' instead
if (demand) {
self.demand(key, demand)
}
if (opt.demandOption) {
self.demandOption(key, typeof opt.demandOption === 'string' ? opt.demandOption : undefined)
}
if ('conflicts' in opt) {
self.conflicts(key, opt.conflicts)
}
if ('default' in opt) {
self.default(key, opt.default)
}
if ('implies' in opt) {
self.implies(key, opt.implies)
}
if ('nargs' in opt) {
self.nargs(key, opt.nargs)
}
if (opt.config) {
self.config(key, opt.configParser)
}
if (opt.normalize) {
self.normalize(key)
}
if ('choices' in opt) {
self.choices(key, opt.choices)
}
if ('coerce' in opt) {
self.coerce(key, opt.coerce)
}
if ('group' in opt) {
self.group(key, opt.group)
}
if (opt.boolean || opt.type === 'boolean') {
self.boolean(key)
if (opt.alias) self.boolean(opt.alias)
}
if (opt.array || opt.type === 'array') {
self.array(key)
if (opt.alias) self.array(opt.alias)
}
if (opt.number || opt.type === 'number') {
self.number(key)
if (opt.alias) self.number(opt.alias)
}
if (opt.string || opt.type === 'string') {
self.string(key)
if (opt.alias) self.string(opt.alias)
}
if (opt.count || opt.type === 'count') {
self.count(key)
}
if (typeof opt.global === 'boolean') {
self.global(key, opt.global)
}
if (opt.defaultDescription) {
options.defaultDescription[key] = opt.defaultDescription
}
if (opt.skipValidation) {
self.skipValidation(key)
}
const desc = opt.describe || opt.description || opt.desc
self.describe(key, desc)
if (opt.hidden) {
self.hide(key)
}
if (opt.requiresArg) {
self.requiresArg(key)
}
}
return self
}
self.getOptions = () => options
self.positional = function (key, opts) {
argsert('<string> <object>', [key, opts], arguments.length)
if (context.resets === 0) {
throw new YError(".positional() can only be called in a command's builder function")
}
// .positional() only supports a subset of the configuration
// options available to .option().
const supportedOpts = ['default', 'defaultDescription', 'implies', 'normalize',
'choices', 'conflicts', 'coerce', 'type', 'describe',
'desc', 'description', 'alias']
opts = objFilter(opts, (k, v) => {
let accept = supportedOpts.indexOf(k) !== -1
// type can be one of string|number|boolean.
if (k === 'type' && ['string', 'number', 'boolean'].indexOf(v) === -1) accept = false
return accept
})
// copy over any settings that can be inferred from the command string.
const fullCommand = context.fullCommands[context.fullCommands.length - 1]
const parseOptions = fullCommand ? command.cmdToParseOptions(fullCommand) : {
array: [],
alias: {},
default: {},
demand: {}
}
Object.keys(parseOptions).forEach((pk) => {
if (Array.isArray(parseOptions[pk])) {
if (parseOptions[pk].indexOf(key) !== -1) opts[pk] = true
} else {
if (parseOptions[pk][key] && !(pk in opts)) opts[pk] = parseOptions[pk][key]
}
})
self.group(key, usage.getPositionalGroupName())
return self.option(key, opts)
}
self.group = function group (opts, groupName) {
argsert('<string|array> <string>', [opts, groupName], arguments.length)
const existing = preservedGroups[groupName] || groups[groupName]
if (preservedGroups[groupName]) {
// we now only need to track this group name in groups.
delete preservedGroups[groupName]
}
const seen = {}
groups[groupName] = (existing || []).concat(opts).filter((key) => {
if (seen[key]) return false
return (seen[key] = true)
})
return self
}
// combine explicit and preserved groups. explicit groups should be first
self.getGroups = () => Object.assign({}, groups, preservedGroups)
// as long as options.envPrefix is not undefined,
// parser will apply env vars matching prefix to argv
self.env = function (prefix) {
argsert('[string|boolean]', [prefix], arguments.length)
if (prefix === false) options.envPrefix = undefined
else options.envPrefix = prefix || ''
return self
}
self.wrap = function (cols) {
argsert('<number|null|undefined>', [cols], arguments.length)
usage.wrap(cols)
return self
}
let strict = false
self.strict = function (enabled) {
argsert('[boolean]', [enabled], arguments.length)
strict = enabled !== false
return self
}
self.getStrict = () => strict
let parserConfig = {}
self.parserConfiguration = function parserConfiguration (config) {
argsert('<object>', [config], arguments.length)
parserConfig = config
return self
}
self.getParserConfiguration = () => parserConfig
self.showHelp = function (level) {
argsert('[string|function]', [level], arguments.length)
if (!self.parsed) self._parseArgs(processArgs) // run parser, if it has not already been executed.
if (command.hasDefaultCommand()) {
context.resets++ // override the restriction on top-level positoinals.
command.runDefaultBuilderOn(self, true)
}
usage.showHelp(level)
return self
}
let versionOpt = null
self.version = function version (opt, msg, ver) {
const defaultVersionOpt = 'version'
argsert('[boolean|string] [string] [string]', [opt, msg, ver], arguments.length)
// nuke the key previously configured
// to return version #.
if (versionOpt) {
deleteFromParserHintObject(versionOpt)
usage.version(undefined)
versionOpt = null
}
if (arguments.length === 0) {
ver = guessVersion()
opt = defaultVersionOpt
} else if (arguments.length === 1) {
if (opt === false) { // disable default 'version' key.
return self
}
ver = opt
opt = defaultVersionOpt
} else if (arguments.length === 2) {
ver = msg
msg = null
}
versionOpt = typeof opt === 'string' ? opt : defaultVersionOpt
msg = msg || usage.deferY18nLookup('Show version number')
usage.version(ver || undefined)
self.boolean(versionOpt)
self.describe(versionOpt, msg)
return self
}
function guessVersion () {
const obj = pkgUp()
return obj.version || 'unknown'
}
let helpOpt = null
self.addHelpOpt = self.help = function addHelpOpt (opt, msg) {
const defaultHelpOpt = 'help'
argsert('[string|boolean] [string]', [opt, msg], arguments.length)
// nuke the key previously configured
// to return help.
if (helpOpt) {
deleteFromParserHintObject(helpOpt)
helpOpt = null
}
if (arguments.length === 1) {
if (opt === false) return self
}
// use arguments, fallback to defaults for opt and msg
helpOpt = typeof opt === 'string' ? opt : defaultHelpOpt
self.boolean(helpOpt)
self.describe(helpOpt, msg || usage.deferY18nLookup('Show help'))
return self
}
const defaultShowHiddenOpt = 'show-hidden'
options.showHiddenOpt = defaultShowHiddenOpt
self.addShowHiddenOpt = self.showHidden = function addShowHiddenOpt (opt, msg) {
argsert('[string|boolean] [string]', [opt, msg], arguments.length)
if (arguments.length === 1) {
if (opt === false) return self
}
const showHiddenOpt = typeof opt === 'string' ? opt : defaultShowHiddenOpt
self.boolean(showHiddenOpt)
self.describe(showHiddenOpt, msg || usage.deferY18nLookup('Show hidden options'))
options.showHiddenOpt = showHiddenOpt
return self
}
self.hide = function hide (key) {
argsert('<string|object>', [key], arguments.length)
options.hiddenOptions.push(key)
return self
}
self.showHelpOnFail = function showHelpOnFail (enabled, message) {
argsert('[boolean|string] [string]', [enabled, message], arguments.length)
usage.showHelpOnFail(enabled, message)
return self
}
var exitProcess = true
self.exitProcess = function (enabled) {
argsert('[boolean]', [enabled], arguments.length)
if (typeof enabled !== 'boolean') {
enabled = true
}
exitProcess = enabled
return self
}
self.getExitProcess = () => exitProcess
var completionCommand = null
self.completion = function (cmd, desc, fn) {
argsert('[string] [string|boolean|function] [function]', [cmd, desc, fn], arguments.length)
// a function to execute when generating
// completions can be provided as the second
// or third argument to completion.
if (typeof desc === 'function') {
fn = desc
desc = null
}
// register the completion command.
completionCommand = cmd || 'completion'
if (!desc && desc !== false) {
desc = 'generate completion script'
}
self.command(completionCommand, desc)
// a function can be provided
if (fn) completion.registerFunction(fn)
return self
}
self.showCompletionScript = function ($0) {
argsert('[string]', [$0], arguments.length)
$0 = $0 || self.$0
_logger.log(completion.generateCompletionScript($0, completionCommand))
return self
}
self.getCompletion = function (args, done) {
argsert('<array> <function>', [args, done], arguments.length)
completion.getCompletion(args, done)
}
self.locale = function (locale) {
argsert('[string]', [locale], arguments.length)
if (arguments.length === 0) {
guessLocale()
return y18n.getLocale()
}
detectLocale = false
y18n.setLocale(locale)
return self
}
self.updateStrings = self.updateLocale = function (obj) {
argsert('<object>', [obj], arguments.length)
detectLocale = false
y18n.updateLocale(obj)
return self
}
let detectLocale = true
self.detectLocale = function (detect) {
argsert('<boolean>', [detect], arguments.length)
detectLocale = detect
return self
}
self.getDetectLocale = () => detectLocale
var hasOutput = false
var exitError = null
// maybe exit, always capture
// context about why we wanted to exit.
self.exit = (code, err) => {
hasOutput = true
exitError = err
if (exitProcess) process.exit(code)
}
// we use a custom logger that buffers output,
// so that we can print to non-CLIs, e.g., chat-bots.
const _logger = {
log () {
const args = []
for (let i = 0; i < arguments.length; i++) args.push(arguments[i])
if (!self._hasParseCallback()) console.log.apply(console, args)
hasOutput = true
if (output.length) output += '\n'
output += args.join(' ')
},
error () {
const args = []
for (let i = 0; i < arguments.length; i++) args.push(arguments[i])
if (!self._hasParseCallback()) console.error.apply(console, args)
hasOutput = true
if (output.length) output += '\n'
output += args.join(' ')
}
}
self._getLoggerInstance = () => _logger
// has yargs output an error our help
// message in the current execution context.
self._hasOutput = () => hasOutput
self._setHasOutput = () => {
hasOutput = true
}
let recommendCommands
self.recommendCommands = function (recommend) {
argsert('[boolean]', [recommend], arguments.length)
recommendCommands = typeof recommend === 'boolean' ? recommend : true
return self
}
self.getUsageInstance = () => usage
self.getValidationInstance = () => validation
self.getCommandInstance = () => command
self.terminalWidth = () => {
argsert([], 0)
return typeof process.stdout.columns !== 'undefined' ? process.stdout.columns : null
}
Object.defineProperty(self, 'argv', {
get: () => self._parseArgs(processArgs),
enumerable: true
})
self._parseArgs = function parseArgs (args, shortCircuit, _skipValidation, commandIndex) {
let skipValidation = !!_skipValidation
args = args || processArgs
options.__ = y18n.__
options.configuration = self.getParserConfiguration()
// Deprecated
let pkgConfig = pkgUp()['yargs']
if (pkgConfig) {
console.warn('Configuring yargs through package.json is deprecated and will be removed in the next major release, please use the JS API instead.')
options.configuration = Object.assign({}, pkgConfig, options.configuration)
}
const parsed = Parser.detailed(args, options)
let argv = parsed.argv
if (parseContext) argv = Object.assign({}, argv, parseContext)
const aliases = parsed.aliases
argv.$0 = self.$0
self.parsed = parsed
try {
guessLocale() // guess locale lazily, so that it can be turned off in chain.
// while building up the argv object, there
// are two passes through the parser. If completion
// is being performed short-circuit on the first pass.
if (shortCircuit) {
return argv
}
// if there's a handler associated with a
// command defer processing to it.
if (helpOpt) {
// consider any multi-char helpOpt alias as a valid help command
// unless all helpOpt aliases are single-char
// note that parsed.aliases is a normalized bidirectional map :)
const helpCmds = [helpOpt]
.concat(aliases[helpOpt] || [])
.filter(k => k.length > 1)
// check if help should trigger and strip it from _.
if (~helpCmds.indexOf(argv._[argv._.length - 1])) {
argv._.pop()
argv[helpOpt] = true
}
}
const handlerKeys = command.getCommands()
const requestCompletions = completion.completionKey in argv
const skipRecommendation = argv[helpOpt] || requestCompletions
const skipDefaultCommand = skipRecommendation && (handlerKeys.length > 1 || handlerKeys[0] !== '$0')
if (argv._.length) {
if (handlerKeys.length) {
let firstUnknownCommand
for (let i = (commandIndex || 0), cmd; argv._[i] !== undefined; i++) {
cmd = String(argv._[i])
if (~handlerKeys.indexOf(cmd) && cmd !== completionCommand) {
// commands are executed using a recursive algorithm that executes
// the deepest command first; we keep track of the position in the
// argv._ array that is currently being executed.
return command.runCommand(cmd, self, parsed, i + 1)
} else if (!firstUnknownCommand && cmd !== completionCommand) {
firstUnknownCommand = cmd
break
}
}
// run the default command, if defined
if (command.hasDefaultCommand() && !skipDefaultCommand) {
return command.runCommand(null, self, parsed)
}
// recommend a command if recommendCommands() has
// been enabled, and no commands were found to execute
if (recommendCommands && firstUnknownCommand && !skipRecommendation) {
validation.recommendCommands(firstUnknownCommand, handlerKeys)
}
}
// generate a completion script for adding to ~/.bashrc.
if (completionCommand && ~argv._.indexOf(completionCommand) && !requestCompletions) {
if (exitProcess) setBlocking(true)
self.showCompletionScript()
self.exit(0)
}
} else if (command.hasDefaultCommand() && !skipDefaultCommand) {
return command.runCommand(null, self, parsed)
}
// we must run completions first, a user might
// want to complete the --help or --version option.
if (requestCompletions) {
if (exitProcess) setBlocking(true)
// we allow for asynchronous completions,
// e.g., loading in a list of commands from an API.
const completionArgs = args.slice(args.indexOf(`--${completion.completionKey}`) + 1)
completion.getCompletion(completionArgs, (completions) => {
;(completions || []).forEach((completion) => {
_logger.log(completion)
})
self.exit(0)
})
return argv
}
// Handle 'help' and 'version' options
// if we haven't already output help!
if (!hasOutput) {
Object.keys(argv).forEach((key) => {
if (key === helpOpt && argv[key]) {
if (exitProcess) setBlocking(true)
skipValidation = true
self.showHelp('log')
self.exit(0)
} else if (key === versionOpt && argv[key]) {
if (exitProcess) setBlocking(true)
skipValidation = true
usage.showVersion()
self.exit(0)
}
})
}
// Check if any of the options to skip validation were provided
if (!skipValidation && options.skipValidation.length > 0) {
skipValidation = Object.keys(argv).some(key => options.skipValidation.indexOf(key) >= 0 && argv[key] === true)
}
// If the help or version options where used and exitProcess is false,
// or if explicitly skipped, we won't run validations.
if (!skipValidation) {
if (parsed.error) throw new YError(parsed.error.message)
// if we're executed via bash completion, don't
// bother with validation.
if (!requestCompletions) {
self._runValidation(argv, aliases, {}, parsed.error)
}
}
} catch (err) {
if (err instanceof YError) usage.fail(err.message, err)
else throw err
}
return argv
}
self._runValidation = function runValidation (argv, aliases, positionalMap, parseErrors) {
if (parseErrors) throw new YError(parseErrors.message || parseErrors)
validation.nonOptionCount(argv)
validation.requiredArguments(argv)
if (strict) validation.unknownArguments(argv, aliases, positionalMap)
validation.customChecks(argv, aliases)
validation.limitedChoices(argv)
validation.implications(argv)
validation.conflicting(argv)
}
function guessLocale () {
if (!detectLocale) return
try {
const { env } = process
const locale = env.LC_ALL || env.LC_MESSAGES || env.LANG || env.LANGUAGE || 'en_US'
self.locale(locale.replace(/[.:].*/, ''))
} catch (err) {
// if we explode looking up locale just noop
// we'll keep using the default language 'en'.
}
}
// an app should almost always have --version and --help,
// if you *really* want to disable this use .help(false)/.version(false).
self.help()
self.version()
return self
}
// rebase an absolute path to a relative one with respect to a base directory
// exported for tests
exports.rebase = rebase
function rebase (base, dir) {
return path.relative(base, dir)
}