342 lines
9.8 KiB
JavaScript
342 lines
9.8 KiB
JavaScript
'use strict'
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const argsert = require('./argsert')
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const objFilter = require('./obj-filter')
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const specialKeys = ['$0', '--', '_']
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// validation-type-stuff, missing params,
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// bad implications, custom checks.
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module.exports = function validation (yargs, usage, y18n) {
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const __ = y18n.__
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const __n = y18n.__n
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const self = {}
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// validate appropriate # of non-option
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// arguments were provided, i.e., '_'.
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self.nonOptionCount = function nonOptionCount (argv) {
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const demandedCommands = yargs.getDemandedCommands()
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// don't count currently executing commands
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const _s = argv._.length - yargs.getContext().commands.length
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if (demandedCommands._ && (_s < demandedCommands._.min || _s > demandedCommands._.max)) {
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if (_s < demandedCommands._.min) {
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if (demandedCommands._.minMsg !== undefined) {
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usage.fail(
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// replace $0 with observed, $1 with expected.
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demandedCommands._.minMsg ? demandedCommands._.minMsg.replace(/\$0/g, _s).replace(/\$1/, demandedCommands._.min) : null
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)
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} else {
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usage.fail(
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__('Not enough non-option arguments: got %s, need at least %s', _s, demandedCommands._.min)
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)
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}
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} else if (_s > demandedCommands._.max) {
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if (demandedCommands._.maxMsg !== undefined) {
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usage.fail(
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// replace $0 with observed, $1 with expected.
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demandedCommands._.maxMsg ? demandedCommands._.maxMsg.replace(/\$0/g, _s).replace(/\$1/, demandedCommands._.max) : null
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)
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} else {
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usage.fail(
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__('Too many non-option arguments: got %s, maximum of %s', _s, demandedCommands._.max)
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)
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}
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}
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}
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}
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// validate the appropriate # of <required>
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// positional arguments were provided:
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self.positionalCount = function positionalCount (required, observed) {
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if (observed < required) {
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usage.fail(
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__('Not enough non-option arguments: got %s, need at least %s', observed, required)
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)
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}
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}
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// make sure all the required arguments are present.
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self.requiredArguments = function requiredArguments (argv) {
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const demandedOptions = yargs.getDemandedOptions()
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let missing = null
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Object.keys(demandedOptions).forEach((key) => {
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if (!argv.hasOwnProperty(key) || typeof argv[key] === 'undefined') {
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missing = missing || {}
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missing[key] = demandedOptions[key]
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}
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})
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if (missing) {
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const customMsgs = []
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Object.keys(missing).forEach((key) => {
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const msg = missing[key]
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if (msg && customMsgs.indexOf(msg) < 0) {
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customMsgs.push(msg)
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}
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})
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const customMsg = customMsgs.length ? `\n${customMsgs.join('\n')}` : ''
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usage.fail(__n(
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'Missing required argument: %s',
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'Missing required arguments: %s',
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Object.keys(missing).length,
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Object.keys(missing).join(', ') + customMsg
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))
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}
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}
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// check for unknown arguments (strict-mode).
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self.unknownArguments = function unknownArguments (argv, aliases, positionalMap) {
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const commandKeys = yargs.getCommandInstance().getCommands()
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const unknown = []
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const currentContext = yargs.getContext()
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Object.keys(argv).forEach((key) => {
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if (specialKeys.indexOf(key) === -1 &&
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!positionalMap.hasOwnProperty(key) &&
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!yargs._getParseContext().hasOwnProperty(key) &&
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!aliases.hasOwnProperty(key)
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) {
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unknown.push(key)
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}
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})
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if (commandKeys.length > 0) {
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argv._.slice(currentContext.commands.length).forEach((key) => {
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if (commandKeys.indexOf(key) === -1) {
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unknown.push(key)
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}
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})
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}
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if (unknown.length > 0) {
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usage.fail(__n(
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'Unknown argument: %s',
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'Unknown arguments: %s',
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unknown.length,
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unknown.join(', ')
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))
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}
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}
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// validate arguments limited to enumerated choices
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self.limitedChoices = function limitedChoices (argv) {
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const options = yargs.getOptions()
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const invalid = {}
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if (!Object.keys(options.choices).length) return
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Object.keys(argv).forEach((key) => {
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if (specialKeys.indexOf(key) === -1 &&
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options.choices.hasOwnProperty(key)) {
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[].concat(argv[key]).forEach((value) => {
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// TODO case-insensitive configurability
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if (options.choices[key].indexOf(value) === -1 &&
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value !== undefined) {
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invalid[key] = (invalid[key] || []).concat(value)
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}
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})
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}
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})
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const invalidKeys = Object.keys(invalid)
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if (!invalidKeys.length) return
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let msg = __('Invalid values:')
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invalidKeys.forEach((key) => {
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msg += `\n ${__(
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'Argument: %s, Given: %s, Choices: %s',
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key,
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usage.stringifiedValues(invalid[key]),
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usage.stringifiedValues(options.choices[key])
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)}`
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})
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usage.fail(msg)
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}
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// custom checks, added using the `check` option on yargs.
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let checks = []
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self.check = function check (f, global) {
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checks.push({
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func: f,
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global
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})
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}
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self.customChecks = function customChecks (argv, aliases) {
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for (let i = 0, f; (f = checks[i]) !== undefined; i++) {
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const func = f.func
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let result = null
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try {
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result = func(argv, aliases)
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} catch (err) {
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usage.fail(err.message ? err.message : err, err)
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continue
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}
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if (!result) {
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usage.fail(__('Argument check failed: %s', func.toString()))
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} else if (typeof result === 'string' || result instanceof Error) {
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usage.fail(result.toString(), result)
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}
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}
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}
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// check implications, argument foo implies => argument bar.
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let implied = {}
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self.implies = function implies (key, value) {
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argsert('<string|object> [array|number|string]', [key, value], arguments.length)
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if (typeof key === 'object') {
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Object.keys(key).forEach((k) => {
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self.implies(k, key[k])
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})
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} else {
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yargs.global(key)
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if (!implied[key]) {
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implied[key] = []
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}
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if (Array.isArray(value)) {
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value.forEach((i) => self.implies(key, i))
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} else {
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implied[key].push(value)
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}
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}
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}
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self.getImplied = function getImplied () {
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return implied
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}
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self.implications = function implications (argv) {
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const implyFail = []
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Object.keys(implied).forEach((key) => {
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const origKey = key
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;(implied[key] || []).forEach((value) => {
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let num
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let key = origKey
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const origValue = value
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// convert string '1' to number 1
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num = Number(key)
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key = isNaN(num) ? key : num
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if (typeof key === 'number') {
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// check length of argv._
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key = argv._.length >= key
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} else if (key.match(/^--no-.+/)) {
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// check if key doesn't exist
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key = key.match(/^--no-(.+)/)[1]
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key = !argv[key]
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} else {
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// check if key exists
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key = argv[key]
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}
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num = Number(value)
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value = isNaN(num) ? value : num
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if (typeof value === 'number') {
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value = argv._.length >= value
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} else if (value.match(/^--no-.+/)) {
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value = value.match(/^--no-(.+)/)[1]
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value = !argv[value]
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} else {
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value = argv[value]
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}
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if (key && !value) {
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implyFail.push(` ${origKey} -> ${origValue}`)
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}
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})
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})
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if (implyFail.length) {
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let msg = `${__('Implications failed:')}\n`
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implyFail.forEach((value) => {
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msg += (value)
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})
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usage.fail(msg)
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}
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}
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let conflicting = {}
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self.conflicts = function conflicts (key, value) {
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argsert('<string|object> [array|string]', [key, value], arguments.length)
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if (typeof key === 'object') {
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Object.keys(key).forEach((k) => {
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self.conflicts(k, key[k])
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})
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} else {
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yargs.global(key)
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if (!conflicting[key]) {
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conflicting[key] = []
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}
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if (Array.isArray(value)) {
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value.forEach((i) => self.conflicts(key, i))
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} else {
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conflicting[key].push(value)
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}
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}
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}
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self.getConflicting = () => conflicting
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self.conflicting = function conflictingFn (argv) {
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Object.keys(argv).forEach((key) => {
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if (conflicting[key]) {
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conflicting[key].forEach((value) => {
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// we default keys to 'undefined' that have been configured, we should not
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// apply conflicting check unless they are a value other than 'undefined'.
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if (value && argv[key] !== undefined && argv[value] !== undefined) {
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usage.fail(__('Arguments %s and %s are mutually exclusive', key, value))
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}
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})
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}
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})
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}
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self.recommendCommands = function recommendCommands (cmd, potentialCommands) {
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const distance = require('./levenshtein')
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const threshold = 3 // if it takes more than three edits, let's move on.
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potentialCommands = potentialCommands.sort((a, b) => b.length - a.length)
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let recommended = null
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let bestDistance = Infinity
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for (let i = 0, candidate; (candidate = potentialCommands[i]) !== undefined; i++) {
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const d = distance(cmd, candidate)
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if (d <= threshold && d < bestDistance) {
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bestDistance = d
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recommended = candidate
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}
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}
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if (recommended) usage.fail(__('Did you mean %s?', recommended))
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}
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self.reset = function reset (localLookup) {
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implied = objFilter(implied, (k, v) => !localLookup[k])
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conflicting = objFilter(conflicting, (k, v) => !localLookup[k])
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checks = checks.filter(c => c.global)
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return self
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}
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let frozen
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self.freeze = function freeze () {
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frozen = {}
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frozen.implied = implied
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frozen.checks = checks
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frozen.conflicting = conflicting
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}
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self.unfreeze = function unfreeze () {
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implied = frozen.implied
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checks = frozen.checks
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conflicting = frozen.conflicting
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frozen = undefined
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}
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return self
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}
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