760 lines
22 KiB
JavaScript
760 lines
22 KiB
JavaScript
var camelCase = require('camelcase')
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var path = require('path')
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var tokenizeArgString = require('./lib/tokenize-arg-string')
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var util = require('util')
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function parse (args, opts) {
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if (!opts) opts = {}
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// allow a string argument to be passed in rather
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// than an argv array.
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args = tokenizeArgString(args)
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// aliases might have transitive relationships, normalize this.
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var aliases = combineAliases(opts.alias || {})
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var configuration = assign({
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'short-option-groups': true,
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'camel-case-expansion': true,
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'dot-notation': true,
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'parse-numbers': true,
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'boolean-negation': true,
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'duplicate-arguments-array': true,
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'flatten-duplicate-arrays': true
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}, opts.configuration)
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var defaults = opts.default || {}
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var configObjects = opts.configObjects || []
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var envPrefix = opts.envPrefix
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var newAliases = {}
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// allow a i18n handler to be passed in, default to a fake one (util.format).
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var __ = opts.__ || function (str) {
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return util.format.apply(util, Array.prototype.slice.call(arguments))
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}
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var error = null
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var flags = {
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aliases: {},
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arrays: {},
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bools: {},
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strings: {},
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numbers: {},
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counts: {},
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normalize: {},
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configs: {},
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defaulted: {},
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nargs: {},
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coercions: {}
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}
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var negative = /^-[0-9]+(\.[0-9]+)?/
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;[].concat(opts.array).filter(Boolean).forEach(function (key) {
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flags.arrays[key] = true
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})
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;[].concat(opts.boolean).filter(Boolean).forEach(function (key) {
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flags.bools[key] = true
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})
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;[].concat(opts.string).filter(Boolean).forEach(function (key) {
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flags.strings[key] = true
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})
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;[].concat(opts.number).filter(Boolean).forEach(function (key) {
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flags.numbers[key] = true
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})
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;[].concat(opts.count).filter(Boolean).forEach(function (key) {
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flags.counts[key] = true
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})
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;[].concat(opts.normalize).filter(Boolean).forEach(function (key) {
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flags.normalize[key] = true
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})
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Object.keys(opts.narg || {}).forEach(function (k) {
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flags.nargs[k] = opts.narg[k]
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})
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Object.keys(opts.coerce || {}).forEach(function (k) {
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flags.coercions[k] = opts.coerce[k]
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})
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if (Array.isArray(opts.config) || typeof opts.config === 'string') {
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;[].concat(opts.config).filter(Boolean).forEach(function (key) {
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flags.configs[key] = true
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})
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} else {
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Object.keys(opts.config || {}).forEach(function (k) {
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flags.configs[k] = opts.config[k]
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})
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}
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// create a lookup table that takes into account all
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// combinations of aliases: {f: ['foo'], foo: ['f']}
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extendAliases(opts.key, aliases, opts.default, flags.arrays)
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// apply default values to all aliases.
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Object.keys(defaults).forEach(function (key) {
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(flags.aliases[key] || []).forEach(function (alias) {
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defaults[alias] = defaults[key]
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})
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})
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var argv = { _: [] }
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Object.keys(flags.bools).forEach(function (key) {
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setArg(key, !(key in defaults) ? false : defaults[key])
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setDefaulted(key)
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})
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var notFlags = []
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if (args.indexOf('--') !== -1) {
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notFlags = args.slice(args.indexOf('--') + 1)
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args = args.slice(0, args.indexOf('--'))
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}
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for (var i = 0; i < args.length; i++) {
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var arg = args[i]
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var broken
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var key
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var letters
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var m
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var next
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var value
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// -- seperated by =
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if (arg.match(/^--.+=/) || (
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!configuration['short-option-groups'] && arg.match(/^-.+=/)
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)) {
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// Using [\s\S] instead of . because js doesn't support the
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// 'dotall' regex modifier. See:
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// http://stackoverflow.com/a/1068308/13216
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m = arg.match(/^--?([^=]+)=([\s\S]*)$/)
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// nargs format = '--f=monkey washing cat'
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if (checkAllAliases(m[1], flags.nargs)) {
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args.splice(i + 1, 0, m[2])
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i = eatNargs(i, m[1], args)
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// arrays format = '--f=a b c'
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} else if (checkAllAliases(m[1], flags.arrays) && args.length > i + 1) {
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args.splice(i + 1, 0, m[2])
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i = eatArray(i, m[1], args)
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} else {
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setArg(m[1], m[2])
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}
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} else if (arg.match(/^--no-.+/) && configuration['boolean-negation']) {
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key = arg.match(/^--no-(.+)/)[1]
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setArg(key, false)
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// -- seperated by space.
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} else if (arg.match(/^--.+/) || (
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!configuration['short-option-groups'] && arg.match(/^-.+/)
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)) {
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key = arg.match(/^--?(.+)/)[1]
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// nargs format = '--foo a b c'
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if (checkAllAliases(key, flags.nargs)) {
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i = eatNargs(i, key, args)
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// array format = '--foo a b c'
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} else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
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i = eatArray(i, key, args)
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} else {
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next = args[i + 1]
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if (next !== undefined && (!next.match(/^-/) ||
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next.match(negative)) &&
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!checkAllAliases(key, flags.bools) &&
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!checkAllAliases(key, flags.counts)) {
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setArg(key, next)
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i++
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} else if (/^(true|false)$/.test(next)) {
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setArg(key, next)
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i++
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} else {
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setArg(key, defaultForType(guessType(key, flags)))
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}
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}
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// dot-notation flag seperated by '='.
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} else if (arg.match(/^-.\..+=/)) {
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m = arg.match(/^-([^=]+)=([\s\S]*)$/)
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setArg(m[1], m[2])
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// dot-notation flag seperated by space.
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} else if (arg.match(/^-.\..+/)) {
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next = args[i + 1]
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key = arg.match(/^-(.\..+)/)[1]
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if (next !== undefined && !next.match(/^-/) &&
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!checkAllAliases(key, flags.bools) &&
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!checkAllAliases(key, flags.counts)) {
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setArg(key, next)
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i++
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} else {
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setArg(key, defaultForType(guessType(key, flags)))
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}
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} else if (arg.match(/^-[^-]+/) && !arg.match(negative)) {
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letters = arg.slice(1, -1).split('')
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broken = false
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for (var j = 0; j < letters.length; j++) {
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next = arg.slice(j + 2)
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if (letters[j + 1] && letters[j + 1] === '=') {
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value = arg.slice(j + 3)
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key = letters[j]
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// nargs format = '-f=monkey washing cat'
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if (checkAllAliases(key, flags.nargs)) {
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args.splice(i + 1, 0, value)
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i = eatNargs(i, key, args)
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// array format = '-f=a b c'
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} else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
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args.splice(i + 1, 0, value)
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i = eatArray(i, key, args)
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} else {
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setArg(key, value)
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}
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broken = true
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break
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}
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if (next === '-') {
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setArg(letters[j], next)
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continue
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}
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// current letter is an alphabetic character and next value is a number
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if (/[A-Za-z]/.test(letters[j]) &&
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/^-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) {
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setArg(letters[j], next)
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broken = true
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break
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}
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if (letters[j + 1] && letters[j + 1].match(/\W/)) {
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setArg(letters[j], next)
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broken = true
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break
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} else {
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setArg(letters[j], defaultForType(guessType(letters[j], flags)))
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}
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}
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key = arg.slice(-1)[0]
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if (!broken && key !== '-') {
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// nargs format = '-f a b c'
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if (checkAllAliases(key, flags.nargs)) {
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i = eatNargs(i, key, args)
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// array format = '-f a b c'
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} else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
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i = eatArray(i, key, args)
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} else {
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next = args[i + 1]
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if (next !== undefined && (!/^(-|--)[^-]/.test(next) ||
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next.match(negative)) &&
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!checkAllAliases(key, flags.bools) &&
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!checkAllAliases(key, flags.counts)) {
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setArg(key, next)
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i++
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} else if (/^(true|false)$/.test(next)) {
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setArg(key, next)
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i++
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} else {
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setArg(key, defaultForType(guessType(key, flags)))
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}
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}
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}
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} else {
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argv._.push(
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flags.strings['_'] || !isNumber(arg) ? arg : Number(arg)
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)
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}
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}
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// order of precedence:
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// 1. command line arg
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// 2. value from config file
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// 3. value from config objects
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// 4. value from env var
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// 5. configured default value
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applyEnvVars(argv, true) // special case: check env vars that point to config file
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setConfig(argv)
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setConfigObjects()
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applyEnvVars(argv, false)
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applyDefaultsAndAliases(argv, flags.aliases, defaults)
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applyCoercions(argv)
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// for any counts either not in args or without an explicit default, set to 0
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Object.keys(flags.counts).forEach(function (key) {
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if (!hasKey(argv, key.split('.'))) setArg(key, 0)
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})
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notFlags.forEach(function (key) {
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argv._.push(key)
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})
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// how many arguments should we consume, based
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// on the nargs option?
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function eatNargs (i, key, args) {
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var toEat = checkAllAliases(key, flags.nargs)
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if (args.length - (i + 1) < toEat) error = Error(__('Not enough arguments following: %s', key))
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for (var ii = i + 1; ii < (toEat + i + 1); ii++) {
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setArg(key, args[ii])
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}
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return (i + toEat)
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}
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// if an option is an array, eat all non-hyphenated arguments
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// following it... YUM!
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// e.g., --foo apple banana cat becomes ["apple", "banana", "cat"]
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function eatArray (i, key, args) {
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var start = i + 1
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var argsToSet = []
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var multipleArrayFlag = i > 0
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for (var ii = i + 1; ii < args.length; ii++) {
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if (/^-/.test(args[ii]) && !negative.test(args[ii])) {
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if (ii === start) {
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setArg(key, defaultForType('array'))
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}
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multipleArrayFlag = true
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break
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}
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i = ii
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argsToSet.push(args[ii])
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}
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if (multipleArrayFlag) {
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setArg(key, argsToSet.map(function (arg) {
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return processValue(key, arg)
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}))
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} else {
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argsToSet.forEach(function (arg) {
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setArg(key, arg)
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})
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}
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return i
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}
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function setArg (key, val) {
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unsetDefaulted(key)
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if (/-/.test(key) && !(flags.aliases[key] && flags.aliases[key].length) && configuration['camel-case-expansion']) {
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var c = camelCase(key)
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flags.aliases[key] = [c]
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newAliases[c] = true
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}
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var value = processValue(key, val)
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var splitKey = key.split('.')
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setKey(argv, splitKey, value)
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// handle populating aliases of the full key
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if (flags.aliases[key]) {
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flags.aliases[key].forEach(function (x) {
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x = x.split('.')
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setKey(argv, x, value)
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})
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}
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// handle populating aliases of the first element of the dot-notation key
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if (splitKey.length > 1 && configuration['dot-notation']) {
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;(flags.aliases[splitKey[0]] || []).forEach(function (x) {
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x = x.split('.')
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// expand alias with nested objects in key
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var a = [].concat(splitKey)
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a.shift() // nuke the old key.
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x = x.concat(a)
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setKey(argv, x, value)
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})
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}
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// Set normalize getter and setter when key is in 'normalize' but isn't an array
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if (checkAllAliases(key, flags.normalize) && !checkAllAliases(key, flags.arrays)) {
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var keys = [key].concat(flags.aliases[key] || [])
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keys.forEach(function (key) {
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argv.__defineSetter__(key, function (v) {
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val = path.normalize(v)
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})
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argv.__defineGetter__(key, function () {
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return typeof val === 'string' ? path.normalize(val) : val
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})
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})
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}
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}
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function processValue (key, val) {
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// handle parsing boolean arguments --foo=true --bar false.
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if (checkAllAliases(key, flags.bools) || checkAllAliases(key, flags.counts)) {
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if (typeof val === 'string') val = val === 'true'
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}
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var value = val
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if (!checkAllAliases(key, flags.strings) && !checkAllAliases(key, flags.coercions)) {
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if (isNumber(val)) value = Number(val)
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if (!isUndefined(val) && !isNumber(val) && checkAllAliases(key, flags.numbers)) value = NaN
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}
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// increment a count given as arg (either no value or value parsed as boolean)
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if (checkAllAliases(key, flags.counts) && (isUndefined(value) || typeof value === 'boolean')) {
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value = increment
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}
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// Set normalized value when key is in 'normalize' and in 'arrays'
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if (checkAllAliases(key, flags.normalize) && checkAllAliases(key, flags.arrays)) {
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if (Array.isArray(val)) value = val.map(path.normalize)
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else value = path.normalize(val)
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}
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return value
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}
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// set args from config.json file, this should be
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// applied last so that defaults can be applied.
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function setConfig (argv) {
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var configLookup = {}
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// expand defaults/aliases, in-case any happen to reference
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// the config.json file.
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applyDefaultsAndAliases(configLookup, flags.aliases, defaults)
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Object.keys(flags.configs).forEach(function (configKey) {
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var configPath = argv[configKey] || configLookup[configKey]
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if (configPath) {
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try {
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var config = null
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var resolvedConfigPath = path.resolve(process.cwd(), configPath)
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if (typeof flags.configs[configKey] === 'function') {
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try {
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config = flags.configs[configKey](resolvedConfigPath)
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} catch (e) {
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config = e
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}
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if (config instanceof Error) {
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error = config
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return
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}
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} else {
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config = require(resolvedConfigPath)
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}
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setConfigObject(config)
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} catch (ex) {
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if (argv[configKey]) error = Error(__('Invalid JSON config file: %s', configPath))
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}
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}
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})
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}
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// set args from config object.
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// it recursively checks nested objects.
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function setConfigObject (config, prev) {
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Object.keys(config).forEach(function (key) {
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var value = config[key]
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var fullKey = prev ? prev + '.' + key : key
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// if the value is an inner object and we have dot-notation
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// enabled, treat inner objects in config the same as
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// heavily nested dot notations (foo.bar.apple).
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if (typeof value === 'object' && !Array.isArray(value) && configuration['dot-notation']) {
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// if the value is an object but not an array, check nested object
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setConfigObject(value, fullKey)
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} else {
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// setting arguments via CLI takes precedence over
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// values within the config file.
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if (!hasKey(argv, fullKey.split('.')) || (flags.defaulted[fullKey])) {
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setArg(fullKey, value)
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}
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}
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})
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}
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// set all config objects passed in opts
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function setConfigObjects () {
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if (typeof configObjects === 'undefined') return
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configObjects.forEach(function (configObject) {
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setConfigObject(configObject)
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})
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}
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function applyEnvVars (argv, configOnly) {
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if (typeof envPrefix === 'undefined') return
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var prefix = typeof envPrefix === 'string' ? envPrefix : ''
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Object.keys(process.env).forEach(function (envVar) {
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if (prefix === '' || envVar.lastIndexOf(prefix, 0) === 0) {
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// get array of nested keys and convert them to camel case
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var keys = envVar.split('__').map(function (key, i) {
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if (i === 0) {
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key = key.substring(prefix.length)
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}
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return camelCase(key)
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})
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if (((configOnly && flags.configs[keys.join('.')]) || !configOnly) && (!hasKey(argv, keys) || flags.defaulted[keys.join('.')])) {
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setArg(keys.join('.'), process.env[envVar])
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}
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}
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})
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}
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function applyCoercions (argv) {
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var coerce
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Object.keys(argv).forEach(function (key) {
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coerce = checkAllAliases(key, flags.coercions)
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if (typeof coerce === 'function') {
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try {
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argv[key] = coerce(argv[key])
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} catch (err) {
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error = err
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
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) {
|
|
if (o[key] === undefined) o[key] = {}
|
|
o = o[key]
|
|
})
|
|
|
|
var key = keys[keys.length - 1]
|
|
|
|
var isTypeArray = checkAllAliases(key, flags.arrays)
|
|
var isValueArray = Array.isArray(value)
|
|
var duplicate = configuration['duplicate-arguments-array']
|
|
|
|
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) : [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 () {
|
|
Array.prototype.slice.call(arguments).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)
|
|
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]
|
|
})
|
|
}
|
|
|
|
// 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, flags) {
|
|
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 (!configuration['parse-numbers']) return false
|
|
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 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
|
|
}
|
|
|
|
function assign (defaults, configuration) {
|
|
var o = {}
|
|
configuration = configuration || {}
|
|
|
|
Object.keys(defaults).forEach(function (k) {
|
|
o[k] = defaults[k]
|
|
})
|
|
Object.keys(configuration).forEach(function (k) {
|
|
o[k] = configuration[k]
|
|
})
|
|
|
|
return o
|
|
}
|
|
|
|
// 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)
|
|
}
|
|
|
|
module.exports = Parser
|