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516 lines
13 KiB
JavaScript
516 lines
13 KiB
JavaScript
// info about each config option.
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var debug = process.env.DEBUG_NOPT || process.env.NOPT_DEBUG
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? function () {
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console.error.apply(console, arguments)
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}
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: function () {}
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var url = require('url')
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var path = require('path')
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var Stream = require('stream').Stream
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var abbrev = require('abbrev')
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var os = require('os')
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module.exports = exports = nopt
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exports.clean = clean
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exports.typeDefs =
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{ String: { type: String, validate: validateString },
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Boolean: { type: Boolean, validate: validateBoolean },
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url: { type: url, validate: validateUrl },
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Number: { type: Number, validate: validateNumber },
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path: { type: path, validate: validatePath },
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Stream: { type: Stream, validate: validateStream },
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Date: { type: Date, validate: validateDate },
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}
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function nopt (types, shorthands, args, slice) {
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args = args || process.argv
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types = types || {}
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shorthands = shorthands || {}
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if (typeof slice !== 'number') {
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slice = 2
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}
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debug(types, shorthands, args, slice)
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args = args.slice(slice)
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var data = {}
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var argv = {
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remain: [],
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cooked: args,
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original: args.slice(0),
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}
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parse(args, data, argv.remain, types, shorthands)
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// now data is full
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clean(data, types, exports.typeDefs)
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data.argv = argv
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Object.defineProperty(data.argv, 'toString', { value: function () {
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return this.original.map(JSON.stringify).join(' ')
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},
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enumerable: false })
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return data
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}
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function clean (data, types, typeDefs) {
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typeDefs = typeDefs || exports.typeDefs
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var remove = {}
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var typeDefault = [false, true, null, String, Array]
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Object.keys(data).forEach(function (k) {
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if (k === 'argv') {
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return
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}
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var val = data[k]
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var isArray = Array.isArray(val)
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var type = types[k]
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if (!isArray) {
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val = [val]
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}
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if (!type) {
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type = typeDefault
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}
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if (type === Array) {
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type = typeDefault.concat(Array)
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}
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if (!Array.isArray(type)) {
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type = [type]
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}
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debug('val=%j', val)
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debug('types=', type)
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val = val.map(function (v) {
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// if it's an unknown value, then parse false/true/null/numbers/dates
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if (typeof v === 'string') {
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debug('string %j', v)
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v = v.trim()
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if ((v === 'null' && ~type.indexOf(null))
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|| (v === 'true' &&
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(~type.indexOf(true) || ~type.indexOf(Boolean)))
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|| (v === 'false' &&
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(~type.indexOf(false) || ~type.indexOf(Boolean)))) {
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v = JSON.parse(v)
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debug('jsonable %j', v)
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} else if (~type.indexOf(Number) && !isNaN(v)) {
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debug('convert to number', v)
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v = +v
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} else if (~type.indexOf(Date) && !isNaN(Date.parse(v))) {
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debug('convert to date', v)
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v = new Date(v)
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}
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}
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if (!Object.prototype.hasOwnProperty.call(types, k)) {
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return v
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}
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// allow `--no-blah` to set 'blah' to null if null is allowed
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if (v === false && ~type.indexOf(null) &&
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!(~type.indexOf(false) || ~type.indexOf(Boolean))) {
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v = null
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}
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var d = {}
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d[k] = v
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debug('prevalidated val', d, v, types[k])
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if (!validate(d, k, v, types[k], typeDefs)) {
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if (exports.invalidHandler) {
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exports.invalidHandler(k, v, types[k], data)
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} else if (exports.invalidHandler !== false) {
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debug('invalid: ' + k + '=' + v, types[k])
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}
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return remove
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}
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debug('validated v', d, v, types[k])
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return d[k]
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}).filter(function (v) {
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return v !== remove
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})
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// if we allow Array specifically, then an empty array is how we
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// express 'no value here', not null. Allow it.
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if (!val.length && type.indexOf(Array) === -1) {
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debug('VAL HAS NO LENGTH, DELETE IT', val, k, type.indexOf(Array))
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delete data[k]
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} else if (isArray) {
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debug(isArray, data[k], val)
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data[k] = val
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} else {
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data[k] = val[0]
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}
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debug('k=%s val=%j', k, val, data[k])
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})
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}
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function validateString (data, k, val) {
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data[k] = String(val)
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}
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function validatePath (data, k, val) {
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if (val === true) {
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return false
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}
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if (val === null) {
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return true
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}
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val = String(val)
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var isWin = process.platform === 'win32'
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var homePattern = isWin ? /^~(\/|\\)/ : /^~\//
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var home = os.homedir()
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if (home && val.match(homePattern)) {
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data[k] = path.resolve(home, val.slice(2))
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} else {
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data[k] = path.resolve(val)
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}
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return true
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}
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function validateNumber (data, k, val) {
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debug('validate Number %j %j %j', k, val, isNaN(val))
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if (isNaN(val)) {
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return false
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}
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data[k] = +val
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}
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function validateDate (data, k, val) {
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var s = Date.parse(val)
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debug('validate Date %j %j %j', k, val, s)
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if (isNaN(s)) {
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return false
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}
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data[k] = new Date(val)
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}
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function validateBoolean (data, k, val) {
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if (val instanceof Boolean) {
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val = val.valueOf()
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} else if (typeof val === 'string') {
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if (!isNaN(val)) {
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val = !!(+val)
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} else if (val === 'null' || val === 'false') {
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val = false
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} else {
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val = true
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}
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} else {
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val = !!val
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}
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data[k] = val
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}
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function validateUrl (data, k, val) {
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// Changing this would be a breaking change in the npm cli
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/* eslint-disable-next-line node/no-deprecated-api */
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val = url.parse(String(val))
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if (!val.host) {
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return false
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}
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data[k] = val.href
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}
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function validateStream (data, k, val) {
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if (!(val instanceof Stream)) {
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return false
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}
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data[k] = val
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}
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function validate (data, k, val, type, typeDefs) {
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// arrays are lists of types.
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if (Array.isArray(type)) {
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for (let i = 0, l = type.length; i < l; i++) {
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if (type[i] === Array) {
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continue
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}
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if (validate(data, k, val, type[i], typeDefs)) {
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return true
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}
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}
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delete data[k]
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return false
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}
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// an array of anything?
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if (type === Array) {
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return true
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}
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// Original comment:
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// NaN is poisonous. Means that something is not allowed.
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// New comment: Changing this to an isNaN check breaks a lot of tests.
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// Something is being assumed here that is not actually what happens in
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// practice. Fixing it is outside the scope of getting linting to pass in
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// this repo. Leaving as-is for now.
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/* eslint-disable-next-line no-self-compare */
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if (type !== type) {
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debug('Poison NaN', k, val, type)
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delete data[k]
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return false
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}
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// explicit list of values
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if (val === type) {
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debug('Explicitly allowed %j', val)
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// if (isArray) (data[k] = data[k] || []).push(val)
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// else data[k] = val
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data[k] = val
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return true
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}
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// now go through the list of typeDefs, validate against each one.
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var ok = false
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var types = Object.keys(typeDefs)
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for (let i = 0, l = types.length; i < l; i++) {
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debug('test type %j %j %j', k, val, types[i])
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var t = typeDefs[types[i]]
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if (t && (
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(type && type.name && t.type && t.type.name) ?
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(type.name === t.type.name) :
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(type === t.type)
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)) {
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var d = {}
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ok = t.validate(d, k, val) !== false
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val = d[k]
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if (ok) {
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// if (isArray) (data[k] = data[k] || []).push(val)
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// else data[k] = val
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data[k] = val
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break
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}
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}
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}
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debug('OK? %j (%j %j %j)', ok, k, val, types[types.length - 1])
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if (!ok) {
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delete data[k]
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}
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return ok
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}
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function parse (args, data, remain, types, shorthands) {
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debug('parse', args, data, remain)
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var abbrevs = abbrev(Object.keys(types))
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var shortAbbr = abbrev(Object.keys(shorthands))
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for (var i = 0; i < args.length; i++) {
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var arg = args[i]
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debug('arg', arg)
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if (arg.match(/^-{2,}$/)) {
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// done with keys.
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// the rest are args.
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remain.push.apply(remain, args.slice(i + 1))
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args[i] = '--'
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break
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}
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var hadEq = false
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if (arg.charAt(0) === '-' && arg.length > 1) {
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var at = arg.indexOf('=')
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if (at > -1) {
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hadEq = true
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var v = arg.slice(at + 1)
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arg = arg.slice(0, at)
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args.splice(i, 1, arg, v)
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}
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// see if it's a shorthand
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// if so, splice and back up to re-parse it.
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var shRes = resolveShort(arg, shorthands, shortAbbr, abbrevs)
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debug('arg=%j shRes=%j', arg, shRes)
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if (shRes) {
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debug(arg, shRes)
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args.splice.apply(args, [i, 1].concat(shRes))
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if (arg !== shRes[0]) {
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i--
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continue
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}
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}
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arg = arg.replace(/^-+/, '')
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var no = null
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while (arg.toLowerCase().indexOf('no-') === 0) {
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no = !no
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arg = arg.slice(3)
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}
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if (abbrevs[arg]) {
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arg = abbrevs[arg]
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}
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var argType = types[arg]
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var isTypeArray = Array.isArray(argType)
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if (isTypeArray && argType.length === 1) {
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isTypeArray = false
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argType = argType[0]
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}
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var isArray = argType === Array ||
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isTypeArray && argType.indexOf(Array) !== -1
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// allow unknown things to be arrays if specified multiple times.
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if (
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!Object.prototype.hasOwnProperty.call(types, arg) &&
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Object.prototype.hasOwnProperty.call(data, arg)
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) {
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if (!Array.isArray(data[arg])) {
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data[arg] = [data[arg]]
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}
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isArray = true
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}
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var val
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var la = args[i + 1]
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var isBool = typeof no === 'boolean' ||
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argType === Boolean ||
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isTypeArray && argType.indexOf(Boolean) !== -1 ||
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(typeof argType === 'undefined' && !hadEq) ||
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(la === 'false' &&
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(argType === null ||
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isTypeArray && ~argType.indexOf(null)))
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if (isBool) {
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// just set and move along
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val = !no
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// however, also support --bool true or --bool false
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if (la === 'true' || la === 'false') {
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val = JSON.parse(la)
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la = null
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if (no) {
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val = !val
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}
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i++
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}
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// also support "foo":[Boolean, "bar"] and "--foo bar"
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if (isTypeArray && la) {
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if (~argType.indexOf(la)) {
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// an explicit type
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val = la
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i++
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} else if (la === 'null' && ~argType.indexOf(null)) {
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// null allowed
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val = null
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i++
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} else if (!la.match(/^-{2,}[^-]/) &&
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!isNaN(la) &&
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~argType.indexOf(Number)) {
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// number
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val = +la
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i++
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} else if (!la.match(/^-[^-]/) && ~argType.indexOf(String)) {
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// string
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val = la
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i++
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}
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}
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if (isArray) {
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(data[arg] = data[arg] || []).push(val)
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} else {
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data[arg] = val
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}
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continue
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}
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if (argType === String) {
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if (la === undefined) {
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la = ''
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} else if (la.match(/^-{1,2}[^-]+/)) {
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la = ''
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i--
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}
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}
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if (la && la.match(/^-{2,}$/)) {
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la = undefined
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i--
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}
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val = la === undefined ? true : la
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if (isArray) {
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(data[arg] = data[arg] || []).push(val)
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} else {
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data[arg] = val
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}
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i++
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continue
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}
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remain.push(arg)
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}
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}
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function resolveShort (arg, shorthands, shortAbbr, abbrevs) {
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// handle single-char shorthands glommed together, like
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// npm ls -glp, but only if there is one dash, and only if
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// all of the chars are single-char shorthands, and it's
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// not a match to some other abbrev.
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arg = arg.replace(/^-+/, '')
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// if it's an exact known option, then don't go any further
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if (abbrevs[arg] === arg) {
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return null
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}
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// if it's an exact known shortopt, same deal
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if (shorthands[arg]) {
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// make it an array, if it's a list of words
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if (shorthands[arg] && !Array.isArray(shorthands[arg])) {
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shorthands[arg] = shorthands[arg].split(/\s+/)
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}
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return shorthands[arg]
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}
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// first check to see if this arg is a set of single-char shorthands
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var singles = shorthands.___singles
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if (!singles) {
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singles = Object.keys(shorthands).filter(function (s) {
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return s.length === 1
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}).reduce(function (l, r) {
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l[r] = true
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return l
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}, {})
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shorthands.___singles = singles
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debug('shorthand singles', singles)
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}
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var chrs = arg.split('').filter(function (c) {
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return singles[c]
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})
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if (chrs.join('') === arg) {
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return chrs.map(function (c) {
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return shorthands[c]
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}).reduce(function (l, r) {
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return l.concat(r)
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}, [])
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}
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// if it's an arg abbrev, and not a literal shorthand, then prefer the arg
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if (abbrevs[arg] && !shorthands[arg]) {
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return null
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}
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// if it's an abbr for a shorthand, then use that
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if (shortAbbr[arg]) {
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arg = shortAbbr[arg]
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}
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// make it an array, if it's a list of words
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if (shorthands[arg] && !Array.isArray(shorthands[arg])) {
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shorthands[arg] = shorthands[arg].split(/\s+/)
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}
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return shorthands[arg]
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}
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