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