319 lines
8.6 KiB
JavaScript
319 lines
8.6 KiB
JavaScript
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const objFilter = require('./obj-filter')
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// validation-type-stuff, missing params,
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// bad implications, custom checks.
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module.exports = function (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 (argv) {
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const demanded = yargs.getDemanded()
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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 (demanded._ && (_s < demanded._.count || _s > demanded._.max)) {
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if (demanded._.msg !== undefined) {
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usage.fail(demanded._.msg)
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} else if (_s < demanded._.count) {
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usage.fail(
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__('Not enough non-option arguments: got %s, need at least %s', _s, demanded._.count)
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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, demanded._.max)
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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 (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 that any args that require an
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// value (--foo=bar), have a value.
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self.missingArgumentValue = function (argv) {
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const defaultValues = [true, false, '']
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const options = yargs.getOptions()
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if (options.requiresArg.length > 0) {
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const missingRequiredArgs = []
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options.requiresArg.forEach(function (key) {
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const value = argv[key]
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// if a value is explicitly requested,
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// flag argument as missing if it does not
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// look like foo=bar was entered.
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if (~defaultValues.indexOf(value) ||
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(Array.isArray(value) && !value.length)) {
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missingRequiredArgs.push(key)
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}
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})
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if (missingRequiredArgs.length > 0) {
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usage.fail(__n(
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'Missing argument value: %s',
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'Missing argument values: %s',
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missingRequiredArgs.length,
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missingRequiredArgs.join(', ')
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))
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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 (argv) {
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const demanded = yargs.getDemanded()
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var missing = null
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Object.keys(demanded).forEach(function (key) {
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if (!argv.hasOwnProperty(key)) {
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missing = missing || {}
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missing[key] = demanded[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(function (key) {
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const msg = missing[key].msg
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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 (argv, aliases) {
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const aliasLookup = {}
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const descriptions = usage.getDescriptions()
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const demanded = yargs.getDemanded()
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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(aliases).forEach(function (key) {
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aliases[key].forEach(function (alias) {
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aliasLookup[alias] = key
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})
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})
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Object.keys(argv).forEach(function (key) {
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if (key !== '$0' && key !== '_' &&
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!descriptions.hasOwnProperty(key) &&
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!demanded.hasOwnProperty(key) &&
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!aliasLookup.hasOwnProperty(key)) {
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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(function (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 (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(function (key) {
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if (key !== '$0' && key !== '_' &&
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options.choices.hasOwnProperty(key)) {
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[].concat(argv[key]).forEach(function (value) {
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// TODO case-insensitive configurability
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if (options.choices[key].indexOf(value) === -1) {
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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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var msg = __('Invalid values:')
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invalidKeys.forEach(function (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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var checks = []
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self.check = function (f) {
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checks.push(f)
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}
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self.customChecks = function (argv, aliases) {
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for (var i = 0, f; (f = checks[i]) !== undefined; i++) {
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var result = null
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try {
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result = f(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', f.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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var implied = {}
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self.implies = function (key, value) {
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if (typeof key === 'object') {
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Object.keys(key).forEach(function (k) {
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self.implies(k, key[k])
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})
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} else {
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implied[key] = value
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}
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}
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self.getImplied = function () {
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return implied
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}
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self.implications = function (argv) {
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const implyFail = []
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Object.keys(implied).forEach(function (key) {
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var booleanNegation
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if (yargs.getOptions().configuration['boolean-negation'] === false) {
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booleanNegation = false
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} else {
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booleanNegation = true
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}
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var num
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const origKey = key
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var value = implied[key]
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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-.+/) && booleanNegation) {
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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-.+/) && booleanNegation) {
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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)
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}
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})
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if (implyFail.length) {
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var msg = __('Implications failed:') + '\n'
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implyFail.forEach(function (key) {
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msg += (' ' + key + ' -> ' + implied[key])
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})
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usage.fail(msg)
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}
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}
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self.recommendCommands = function (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(function (a, b) { return b.length - a.length })
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var recommended = null
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var bestDistance = Infinity
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for (var i = 0, candidate; (candidate = potentialCommands[i]) !== undefined; i++) {
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var 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 (globalLookup) {
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implied = objFilter(implied, function (k, v) {
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return globalLookup[k]
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})
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checks = []
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return self
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}
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var frozen
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self.freeze = function () {
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frozen = {}
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frozen.implied = implied
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frozen.checks = checks
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}
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self.unfreeze = function () {
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implied = frozen.implied
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checks = frozen.checks
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frozen = undefined
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}
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return self
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}
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