416 lines
12 KiB
JavaScript
416 lines
12 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 () { console.error.apply(console, arguments) }
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: function () {}
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var url = require("url")
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, path = require("path")
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, Stream = require("stream").Stream
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, abbrev = require("abbrev")
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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") slice = 2
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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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, key
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, remain = []
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, cooked = args
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, original = args.slice(0)
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parse(args, data, 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 = {remain:remain,cooked:cooked,original:original}
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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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}, 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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, typeDefault = [false, true, null, String, Array]
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Object.keys(data).forEach(function (k) {
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if (k === "argv") return
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var val = data[k]
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, isArray = Array.isArray(val)
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, type = types[k]
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if (!isArray) val = [val]
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if (!type) type = typeDefault
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if (type === Array) type = typeDefault.concat(Array)
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if (!Array.isArray(type)) type = [type]
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debug("val=%j", val)
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debug("types=", type)
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val = val.map(function (val) {
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// if it's an unknown value, then parse false/true/null/numbers/dates
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if (typeof val === "string") {
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debug("string %j", val)
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val = val.trim()
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if ((val === "null" && ~type.indexOf(null))
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|| (val === "true" &&
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(~type.indexOf(true) || ~type.indexOf(Boolean)))
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|| (val === "false" &&
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(~type.indexOf(false) || ~type.indexOf(Boolean)))) {
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val = JSON.parse(val)
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debug("jsonable %j", val)
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} else if (~type.indexOf(Number) && !isNaN(val)) {
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debug("convert to number", val)
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val = +val
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} else if (~type.indexOf(Date) && !isNaN(Date.parse(val))) {
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debug("convert to date", val)
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val = new Date(val)
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}
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}
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if (!types.hasOwnProperty(k)) {
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return val
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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 (val === false && ~type.indexOf(null) &&
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!(~type.indexOf(false) || ~type.indexOf(Boolean))) {
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val = null
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}
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var d = {}
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d[k] = val
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debug("prevalidated val", d, val, types[k])
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if (!validate(d, k, val, types[k], typeDefs)) {
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if (exports.invalidHandler) {
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exports.invalidHandler(k, val, types[k], data)
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} else if (exports.invalidHandler !== false) {
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debug("invalid: "+k+"="+val, types[k])
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}
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return remove
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}
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debug("validated val", d, val, types[k])
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return d[k]
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}).filter(function (val) { return val !== remove })
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if (!val.length) 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 data[k] = val[0]
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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) return false
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if (val === null) return true
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val = String(val)
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var homePattern = process.platform === 'win32' ? /^~(\/|\\)/ : /^~\//
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if (val.match(homePattern) && process.env.HOME) {
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val = path.resolve(process.env.HOME, val.substr(2))
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}
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data[k] = path.resolve(String(val))
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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)) return false
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data[k] = +val
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}
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function validateDate (data, k, val) {
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debug("validate Date %j %j %j", k, val, Date.parse(val))
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var s = Date.parse(val)
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if (isNaN(s)) return false
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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) val = val.valueOf()
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else if (typeof val === "string") {
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if (!isNaN(val)) val = !!(+val)
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else if (val === "null" || val === "false") val = false
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else val = true
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} else val = !!val
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data[k] = val
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}
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function validateUrl (data, k, val) {
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val = url.parse(String(val))
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if (!val.host) return false
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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)) return false
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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 (var i = 0, l = type.length; i < l; i ++) {
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if (type[i] === Array) continue
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if (validate(data, k, val, type[i], typeDefs)) return true
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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) return true
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// NaN is poisonous. Means that something is not allowed.
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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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, types = Object.keys(typeDefs)
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for (var 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) ? (type.name === t.type.name) : (type === t.type))) {
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var d = {}
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ok = false !== t.validate(d, k, val)
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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[i])
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if (!ok) delete data[k]
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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 key = null
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, abbrevs = abbrev(Object.keys(types))
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, 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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if (arg.indexOf("=") !== -1) {
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hadEq = true
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var v = arg.split("=")
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arg = v.shift()
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v = v.join("=")
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args.splice.apply(args, [i, 1].concat([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.substr(3)
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}
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if (abbrevs[arg]) arg = abbrevs[arg]
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var isArray = types[arg] === Array ||
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Array.isArray(types[arg]) && types[arg].indexOf(Array) !== -1
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// allow unknown things to be arrays if specified multiple times.
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if (!types.hasOwnProperty(arg) && data.hasOwnProperty(arg)) {
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if (!Array.isArray(data[arg]))
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data[arg] = [data[arg]]
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isArray = true
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}
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var val
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, la = args[i + 1]
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var isBool = typeof no === 'boolean' ||
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types[arg] === Boolean ||
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Array.isArray(types[arg]) && types[arg].indexOf(Boolean) !== -1 ||
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(typeof types[arg] === 'undefined' && !hadEq) ||
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(la === "false" &&
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(types[arg] === null ||
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Array.isArray(types[arg]) && ~types[arg].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) val = !val
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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 (Array.isArray(types[arg]) && la) {
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if (~types[arg].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" && ~types[arg].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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~types[arg].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(/^-[^-]/) && ~types[arg].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) (data[arg] = data[arg] || []).push(val)
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else data[arg] = val
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continue
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}
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if (types[arg] === String && la === undefined)
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la = ""
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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) (data[arg] = data[arg] || []).push(val)
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else data[arg] = val
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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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// 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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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) 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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// 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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// 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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// 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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return shorthands[arg]
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}
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