521 lines
14 KiB
JavaScript
521 lines
14 KiB
JavaScript
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// fancy-pants parsing of argv, originally forked
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// from minimist: https://www.npmjs.com/package/minimist
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var camelCase = require('camelcase')
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var path = require('path')
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function increment (orig) {
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return orig !== undefined ? orig + 1 : 0
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}
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module.exports = function (args, opts, y18n) {
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if (!opts) opts = {}
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var __ = y18n.__
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var error = null
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var flags = { arrays: {}, bools: {}, strings: {}, counts: {}, normalize: {}, configs: {}, defaulted: {} }
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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.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.config).forEach(function (k) {
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flags.configs[k] = opts.config[k]
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})
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var aliases = {}
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var newAliases = {}
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extendAliases(opts.key)
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extendAliases(opts.alias)
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extendAliases(opts.default)
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var defaults = opts['default'] || {}
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Object.keys(defaults).forEach(function (key) {
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if (/-/.test(key) && !opts.alias[key]) {
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aliases[key] = aliases[key] || []
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}
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(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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// 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], opts.narg)) {
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args.splice(i + 1, m[1], 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, m[1], 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-.+/)) {
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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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key = arg.match(/^--(.+)/)[1]
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// nargs format = '--foo a b c'
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if (checkAllAliases(key, opts.narg)) {
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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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!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(/^-[^-]+/)) {
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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(letters[j], opts.narg)) {
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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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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], arg.slice(j + 2))
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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, opts.narg)) {
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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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if (args[i + 1] && !/^(-|--)[^-]/.test(args[i + 1]) &&
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!checkAllAliases(key, flags.bools) &&
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!checkAllAliases(key, flags.counts)) {
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setArg(key, args[i + 1])
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i++
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} else if (args[i + 1] && /true|false/.test(args[i + 1])) {
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setArg(key, args[i + 1])
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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 env var
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// 4. configured default value
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applyEnvVars(opts, argv, true) // special case: check env vars that point to config file
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setConfig(argv)
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applyEnvVars(opts, argv, false)
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applyDefaultsAndAliases(argv, aliases, defaults)
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Object.keys(flags.counts).forEach(function (key) {
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setArg(key, defaults[key])
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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, opts.narg)
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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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for (var ii = i + 1; ii < args.length; ii++) {
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if (/^-/.test(args[ii])) break
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i = ii
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setArg(key, args[ii])
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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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// 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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if (/-/.test(key) && !(aliases[key] && aliases[key].length)) {
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var c = camelCase(key)
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aliases[key] = [c]
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newAliases[c] = true
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}
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var value = !checkAllAliases(key, flags.strings) && isNumber(val) ? Number(val) : val
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if (checkAllAliases(key, flags.counts)) {
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value = increment
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}
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var splitKey = key.split('.')
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setKey(argv, splitKey, value)
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// alias references an inner-value within
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// a dot-notation object. see #279.
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if (~key.indexOf('.') && aliases[key]) {
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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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;(aliases[splitKey[0]] || []).forEach(function (x) {
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x = x.split('.')
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// handle populating dot notation for both
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// the key and its aliases.
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if (splitKey.length > 1) {
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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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}
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setKey(argv, x, value)
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})
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var keys = [key].concat(aliases[key] || [])
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for (var i = 0, l = keys.length; i < l; i++) {
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if (flags.normalize[keys[i]]) {
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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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break
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}
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}
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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, 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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Object.keys(config).forEach(function (key) {
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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 (argv[key] === undefined || (flags.defaulted[key])) {
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delete argv[key]
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setArg(key, config[key])
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}
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})
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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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function applyEnvVars (opts, argv, configOnly) {
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if (typeof opts.envPrefix === 'undefined') return
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var prefix = typeof opts.envPrefix === 'string' ? opts.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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var key = camelCase(envVar.substring(prefix.length))
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if (((configOnly && flags.configs[key]) || !configOnly) && (!(key in argv) || flags.defaulted[key])) {
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setArg(key, process.env[envVar])
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}
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}
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})
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}
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function applyDefaultsAndAliases (obj, aliases, defaults) {
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Object.keys(defaults).forEach(function (key) {
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if (!hasKey(obj, key.split('.'))) {
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setKey(obj, key.split('.'), defaults[key])
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;(aliases[key] || []).forEach(function (x) {
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if (hasKey(obj, x.split('.'))) return
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setKey(obj, x.split('.'), defaults[key])
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})
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}
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})
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}
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function hasKey (obj, keys) {
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var o = obj
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keys.slice(0, -1).forEach(function (key) {
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o = (o[key] || {})
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})
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var key = keys[keys.length - 1]
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if (typeof o !== 'object') return false
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else return key in o
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}
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function setKey (obj, keys, value) {
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var o = obj
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keys.slice(0, -1).forEach(function (key) {
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if (o[key] === undefined) o[key] = {}
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o = o[key]
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})
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var key = keys[keys.length - 1]
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if (value === increment) {
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o[key] = increment(o[key])
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} else if (o[key] === undefined && checkAllAliases(key, flags.arrays)) {
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o[key] = Array.isArray(value) ? value : [value]
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} else if (o[key] === undefined || typeof o[key] === 'boolean') {
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o[key] = value
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} else if (Array.isArray(o[key])) {
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o[key].push(value)
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} else {
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o[key] = [ o[key], value ]
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}
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}
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// extend the aliases list with inferred aliases.
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function extendAliases (obj) {
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||
|
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 (aliases[key]) return
|
||
|
|
||
|
aliases[key] = [].concat(opts.alias[key] || [])
|
||
|
// For "--option-name", also set argv.optionName
|
||
|
aliases[key].concat(key).forEach(function (x) {
|
||
|
if (/-/.test(x)) {
|
||
|
var c = camelCase(x)
|
||
|
aliases[key].push(c)
|
||
|
newAliases[c] = true
|
||
|
}
|
||
|
})
|
||
|
aliases[key].forEach(function (x) {
|
||
|
aliases[x] = [key].concat(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(aliases[key] || [], key)
|
||
|
|
||
|
toCheck.forEach(function (key) {
|
||
|
if (flag[key]) isSet = flag[key]
|
||
|
})
|
||
|
|
||
|
return isSet
|
||
|
}
|
||
|
|
||
|
function setDefaulted (key) {
|
||
|
[].concat(aliases[key] || [], key).forEach(function (k) {
|
||
|
flags.defaulted[k] = true
|
||
|
})
|
||
|
}
|
||
|
|
||
|
function unsetDefaulted (key) {
|
||
|
[].concat(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: '',
|
||
|
array: []
|
||
|
}
|
||
|
|
||
|
return def[type]
|
||
|
}
|
||
|
|
||
|
// given a flag, enforce a default type.
|
||
|
function guessType (key, flags) {
|
||
|
var type = 'boolean'
|
||
|
|
||
|
if (flags.strings && flags.strings[key]) type = 'string'
|
||
|
else if (flags.arrays && flags.arrays[key]) type = 'array'
|
||
|
|
||
|
return type
|
||
|
}
|
||
|
|
||
|
function isNumber (x) {
|
||
|
if (typeof x === 'number') return true
|
||
|
if (/^0x[0-9a-f]+$/i.test(x)) return true
|
||
|
return /^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/.test(x)
|
||
|
}
|
||
|
|
||
|
return {
|
||
|
argv: argv,
|
||
|
aliases: aliases,
|
||
|
error: error,
|
||
|
newAliases: newAliases
|
||
|
}
|
||
|
}
|