Added logging, changed some directory structure

goTorrentWebUI/node_modules/webpack/node_modules/uglify-js/node_modules/yargs/lib/completion.js

@@ -0,0 +1,71 @@
+var fs = require('fs'),
+  path = require('path')
+
+// add bash completions to your
+//  yargs-powered applications.
+module.exports = function (yargs, usage) {
+  var self = {
+    completionKey: 'get-yargs-completions'
+  }
+
+  // get a list of completion commands.
+  self.getCompletion = function (done) {
+    var completions = [],
+    current = process.argv[process.argv.length - 1],
+    previous = process.argv.slice(process.argv.indexOf('--' + self.completionKey) + 1),
+    argv = yargs.parse(previous)
+
+    // a custom completion function can be provided
+    // to completion().
+    if (completionFunction) {
+      if (completionFunction.length < 3) {
+        // synchronous completion function.
+        return done(completionFunction(current, argv))
+      } else {
+        // asynchronous completion function
+        return completionFunction(current, argv, function (completions) {
+          done(completions)
+        })
+      }
+    }
+
+    if (!current.match(/^-/)) {
+      usage.getCommands().forEach(function (command) {
+        completions.push(command[0])
+      })
+    }
+
+    if (current.match(/^-/)) {
+      Object.keys(yargs.getOptions().key).forEach(function (key) {
+        completions.push('--' + key)
+      })
+    }
+
+    done(completions)
+  }
+
+  // generate the completion script to add to your .bashrc.
+  self.generateCompletionScript = function ($0) {
+    var script = fs.readFileSync(
+      path.resolve(__dirname, '../completion.sh.hbs'),
+      'utf-8'
+    ),
+    name = path.basename($0)
+
+    // add ./to applications not yet installed as bin.
+    if ($0.match(/\.js$/)) $0 = './' + $0
+
+    script = script.replace(/{{app_name}}/g, name)
+    return script.replace(/{{app_path}}/g, $0)
+  }
+
+  // register a function to perform your own custom
+  // completions., this function can be either
+  // synchrnous or asynchronous.
+  var completionFunction = null
+  self.registerFunction = function (fn) {
+    completionFunction = fn
+  }
+
+  return self
+}

goTorrentWebUI/node_modules/webpack/node_modules/uglify-js/node_modules/yargs/lib/parser.js

@@ -0,0 +1,448 @@
+// fancy-pants parsing of argv, originally forked
+// from minimist: https://www.npmjs.com/package/minimist
+var camelCase = require('camelcase'),
+  path = require('path')
+
+function increment (orig) {
+  return orig !== undefined ? orig + 1 : 0
+}
+
+module.exports = function (args, opts) {
+  if (!opts) opts = {}
+  var flags = { arrays: {}, bools: {}, strings: {}, counts: {}, normalize: {}, configs: {} }
+
+  ;[].concat(opts['array']).filter(Boolean).forEach(function (key) {
+    flags.arrays[key] = true
+  })
+
+  ;[].concat(opts['boolean']).filter(Boolean).forEach(function (key) {
+    flags.bools[key] = true
+  })
+
+  ;[].concat(opts.string).filter(Boolean).forEach(function (key) {
+    flags.strings[key] = true
+  })
+
+  ;[].concat(opts.count).filter(Boolean).forEach(function (key) {
+    flags.counts[key] = true
+  })
+
+  ;[].concat(opts.normalize).filter(Boolean).forEach(function (key) {
+    flags.normalize[key] = true
+  })
+
+  ;[].concat(opts.config).filter(Boolean).forEach(function (key) {
+    flags.configs[key] = true
+  })
+
+  var aliases = {},
+  newAliases = {}
+
+  extendAliases(opts.key)
+  extendAliases(opts.alias)
+
+  var defaults = opts['default'] || {}
+  Object.keys(defaults).forEach(function (key) {
+    if (/-/.test(key) && !opts.alias[key]) {
+      aliases[key] = aliases[key] || []
+    }
+    (aliases[key] || []).forEach(function (alias) {
+      defaults[alias] = defaults[key]
+    })
+  })
+
+  var argv = { _: [] }
+
+  Object.keys(flags.bools).forEach(function (key) {
+    setArg(key, !(key in defaults) ? false : defaults[key])
+  })
+
+  var notFlags = []
+  if (args.indexOf('--') !== -1) {
+    notFlags = args.slice(args.indexOf('--') + 1)
+    args = args.slice(0, args.indexOf('--'))
+  }
+
+  for (var i = 0; i < args.length; i++) {
+    var arg = args[i],
+      broken,
+      key,
+      letters,
+      m,
+      next,
+      value
+
+    // -- seperated by =
+    if (arg.match(/^--.+=/)) {
+      // Using [\s\S] instead of . because js doesn't support the
+      // 'dotall' regex modifier. See:
+      // http://stackoverflow.com/a/1068308/13216
+      m = arg.match(/^--([^=]+)=([\s\S]*)$/)
+
+      // nargs format = '--f=monkey washing cat'
+      if (checkAllAliases(m[1], opts.narg)) {
+        args.splice(i + 1, m[1], m[2])
+        i = eatNargs(i, m[1], args)
+      // arrays format = '--f=a b c'
+      } else if (checkAllAliases(m[1], flags.arrays) && args.length > i + 1) {
+        args.splice(i + 1, m[1], m[2])
+        i = eatArray(i, m[1], args)
+      } else {
+        setArg(m[1], m[2])
+      }
+    } else if (arg.match(/^--no-.+/)) {
+      key = arg.match(/^--no-(.+)/)[1]
+      setArg(key, false)
+
+    // -- seperated by space.
+    } else if (arg.match(/^--.+/)) {
+      key = arg.match(/^--(.+)/)[1]
+
+      // nargs format = '--foo a b c'
+      if (checkAllAliases(key, opts.narg)) {
+        i = eatNargs(i, key, args)
+      // array format = '--foo a b c'
+      } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
+        i = eatArray(i, key, args)
+      } else {
+        next = args[i + 1]
+
+        if (next !== undefined && !next.match(/^-/)
+        && !checkAllAliases(key, flags.bools)
+        && !checkAllAliases(key, flags.counts)) {
+          setArg(key, next)
+          i++
+        } else if (/^(true|false)$/.test(next)) {
+          setArg(key, next)
+          i++
+        } else {
+          setArg(key, defaultForType(guessType(key, flags)))
+        }
+      }
+
+    // dot-notation flag seperated by '='.
+    } else if (arg.match(/^-.\..+=/)) {
+      m = arg.match(/^-([^=]+)=([\s\S]*)$/)
+      setArg(m[1], m[2])
+
+    // dot-notation flag seperated by space.
+    } else if (arg.match(/^-.\..+/)) {
+      next = args[i + 1]
+      key = arg.match(/^-(.\..+)/)[1]
+
+      if (next !== undefined && !next.match(/^-/)
+        && !checkAllAliases(key, flags.bools)
+        && !checkAllAliases(key, flags.counts)) {
+        setArg(key, next)
+        i++
+      } else {
+        setArg(key, defaultForType(guessType(key, flags)))
+      }
+    } else if (arg.match(/^-[^-]+/)) {
+      letters = arg.slice(1, -1).split('')
+      broken = false
+
+      for (var j = 0; j < letters.length; j++) {
+        next = arg.slice(j + 2)
+
+        if (letters[j + 1] && letters[j + 1] === '=') {
+          value = arg.slice(j + 3)
+          key = letters[j]
+
+          // nargs format = '-f=monkey washing cat'
+          if (checkAllAliases(letters[j], opts.narg)) {
+            args.splice(i + 1, 0, value)
+            i = eatNargs(i, key, args)
+          // array format = '-f=a b c'
+          } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
+            args.splice(i + 1, 0, value)
+            i = eatArray(i, key, args)
+          } else {
+            setArg(key, value)
+          }
+
+          broken = true
+          break
+        }
+
+        if (next === '-') {
+          setArg(letters[j], next)
+          continue
+        }
+
+        if (/[A-Za-z]/.test(letters[j])
+        && /-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) {
+          setArg(letters[j], next)
+          broken = true
+          break
+        }
+
+        if (letters[j + 1] && letters[j + 1].match(/\W/)) {
+          setArg(letters[j], arg.slice(j + 2))
+          broken = true
+          break
+        } else {
+          setArg(letters[j], defaultForType(guessType(letters[j], flags)))
+        }
+      }
+
+      key = arg.slice(-1)[0]
+
+      if (!broken && key !== '-') {
+        // nargs format = '-f a b c'
+        if (checkAllAliases(key, opts.narg)) {
+          i = eatNargs(i, key, args)
+        // array format = '-f a b c'
+        } else if (checkAllAliases(key, flags.arrays) && args.length > i + 1) {
+          i = eatArray(i, key, args)
+        } else {
+          if (args[i + 1] && !/^(-|--)[^-]/.test(args[i + 1])
+          && !checkAllAliases(key, flags.bools)
+          && !checkAllAliases(key, flags.counts)) {
+            setArg(key, args[i + 1])
+            i++
+          } else if (args[i + 1] && /true|false/.test(args[i + 1])) {
+            setArg(key, args[i + 1])
+            i++
+          } else {
+            setArg(key, defaultForType(guessType(key, flags)))
+          }
+        }
+      }
+    } else {
+      argv._.push(
+        flags.strings['_'] || !isNumber(arg) ? arg : Number(arg)
+      )
+    }
+  }
+
+  setConfig(argv)
+  applyDefaultsAndAliases(argv, aliases, defaults)
+
+  Object.keys(flags.counts).forEach(function (key) {
+    setArg(key, defaults[key])
+  })
+
+  notFlags.forEach(function (key) {
+    argv._.push(key)
+  })
+
+  // how many arguments should we consume, based
+  // on the nargs option?
+  function eatNargs (i, key, args) {
+    var toEat = checkAllAliases(key, opts.narg)
+
+    if (args.length - (i + 1) < toEat) throw Error('not enough arguments following: ' + key)
+
+    for (var ii = i + 1; ii < (toEat + i + 1); ii++) {
+      setArg(key, args[ii])
+    }
+
+    return (i + toEat)
+  }
+
+  // if an option is an array, eat all non-hyphenated arguments
+  // following it... YUM!
+  // e.g., --foo apple banana cat becomes ["apple", "banana", "cat"]
+  function eatArray (i, key, args) {
+    for (var ii = i + 1; ii < args.length; ii++) {
+      if (/^-/.test(args[ii])) break
+      i = ii
+      setArg(key, args[ii])
+    }
+
+    return i
+  }
+
+  function setArg (key, val) {
+    // handle parsing boolean arguments --foo=true --bar false.
+    if (checkAllAliases(key, flags.bools) || checkAllAliases(key, flags.counts)) {
+      if (typeof val === 'string') val = val === 'true'
+    }
+
+    if (/-/.test(key) && !(aliases[key] && aliases[key].length)) {
+      var c = camelCase(key)
+      aliases[key] = [c]
+      newAliases[c] = true
+    }
+
+    var value = !checkAllAliases(key, flags.strings) && isNumber(val) ? Number(val) : val
+
+    if (checkAllAliases(key, flags.counts)) {
+      value = increment
+    }
+
+    var splitKey = key.split('.')
+    setKey(argv, splitKey, value)
+
+    ;(aliases[splitKey[0]] || []).forEach(function (x) {
+      x = x.split('.')
+
+      // handle populating dot notation for both
+      // the key and its aliases.
+      if (splitKey.length > 1) {
+        var a = [].concat(splitKey)
+        a.shift() // nuke the old key.
+        x = x.concat(a)
+      }
+
+      setKey(argv, x, value)
+    })
+
+    var keys = [key].concat(aliases[key] || [])
+    for (var i = 0, l = keys.length; i < l; i++) {
+      if (flags.normalize[keys[i]]) {
+        keys.forEach(function (key) {
+          argv.__defineSetter__(key, function (v) {
+            val = path.normalize(v)
+          })
+
+          argv.__defineGetter__(key, function () {
+            return typeof val === 'string' ?
+            path.normalize(val) : val
+          })
+        })
+        break
+      }
+    }
+  }
+
+  // set args from config.json file, this should be
+  // applied last so that defaults can be applied.
+  function setConfig (argv) {
+    var configLookup = {}
+
+    // expand defaults/aliases, in-case any happen to reference
+    // the config.json file.
+    applyDefaultsAndAliases(configLookup, aliases, defaults)
+
+    Object.keys(flags.configs).forEach(function (configKey) {
+      var configPath = argv[configKey] || configLookup[configKey]
+      if (configPath) {
+        try {
+          var config = require(path.resolve(process.cwd(), configPath))
+
+          Object.keys(config).forEach(function (key) {
+            // setting arguments via CLI takes precedence over
+            // values within the config file.
+            if (argv[key] === undefined) {
+              delete argv[key]
+              setArg(key, config[key])
+            }
+          })
+        } catch (ex) {
+          throw Error('invalid json config file: ' + configPath)
+        }
+      }
+    })
+  }
+
+  function applyDefaultsAndAliases (obj, aliases, defaults) {
+    Object.keys(defaults).forEach(function (key) {
+      if (!hasKey(obj, key.split('.'))) {
+        setKey(obj, key.split('.'), defaults[key])
+
+        ;(aliases[key] || []).forEach(function (x) {
+          setKey(obj, x.split('.'), defaults[key])
+        })
+      }
+    })
+  }
+
+  function hasKey (obj, keys) {
+    var o = obj
+    keys.slice(0, -1).forEach(function (key) {
+      o = (o[key] || {})
+    })
+
+    var key = keys[keys.length - 1]
+    return key in o
+  }
+
+  function setKey (obj, keys, value) {
+    var o = obj
+    keys.slice(0, -1).forEach(function (key) {
+      if (o[key] === undefined) o[key] = {}
+      o = o[key]
+    })
+
+    var key = keys[keys.length - 1]
+    if (value === increment) {
+      o[key] = increment(o[key])
+    } else if (o[key] === undefined && checkAllAliases(key, flags.arrays)) {
+      o[key] = Array.isArray(value) ? value : [value]
+    } else if (o[key] === undefined || typeof o[key] === 'boolean') {
+      o[key] = value
+    } else if (Array.isArray(o[key])) {
+      o[key].push(value)
+    } else {
+      o[key] = [ o[key], value ]
+    }
+  }
+
+  // extend the aliases list with inferred aliases.
+  function extendAliases (obj) {
+    Object.keys(obj || {}).forEach(function (key) {
+      aliases[key] = [].concat(opts.alias[key] || [])
+      // For "--option-name", also set argv.optionName
+      aliases[key].concat(key).forEach(function (x) {
+        if (/-/.test(x)) {
+          var c = camelCase(x)
+          aliases[key].push(c)
+          newAliases[c] = true
+        }
+      })
+      aliases[key].forEach(function (x) {
+        aliases[x] = [key].concat(aliases[key].filter(function (y) {
+          return x !== y
+        }))
+      })
+    })
+  }
+
+  // check if a flag is set for any of a key's aliases.
+  function checkAllAliases (key, flag) {
+    var isSet = false,
+    toCheck = [].concat(aliases[key] || [], key)
+
+    toCheck.forEach(function (key) {
+      if (flag[key]) isSet = flag[key]
+    })
+
+    return isSet
+  }
+
+  // return a default value, given the type of a flag.,
+  // e.g., key of type 'string' will default to '', rather than 'true'.
+  function defaultForType (type) {
+    var def = {
+      boolean: true,
+      string: '',
+      array: []
+    }
+
+    return def[type]
+  }
+
+  // given a flag, enforce a default type.
+  function guessType (key, flags) {
+    var type = 'boolean'
+
+    if (flags.strings && flags.strings[key]) type = 'string'
+    else if (flags.arrays && flags.arrays[key]) type = 'array'
+
+    return type
+  }
+
+  function isNumber (x) {
+    if (typeof x === 'number') return true
+    if (/^0x[0-9a-f]+$/i.test(x)) return true
+    return /^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/.test(x)
+  }
+
+  return {
+    argv: argv,
+    aliases: aliases,
+    newAliases: newAliases
+  }
+}

goTorrentWebUI/node_modules/webpack/node_modules/uglify-js/node_modules/yargs/lib/usage.js

@@ -0,0 +1,314 @@
+// this file handles outputting usage instructions,
+// failures, etc. keeps logging in one place.
+var cliui = require('cliui'),
+  decamelize = require('decamelize'),
+  wsize = require('window-size')
+
+module.exports = function (yargs) {
+  var self = {}
+
+  // methods for ouputting/building failure message.
+  var fails = []
+  self.failFn = function (f) {
+    fails.push(f)
+  }
+
+  var failMessage = null
+  var showHelpOnFail = true
+  self.showHelpOnFail = function (enabled, message) {
+    if (typeof enabled === 'string') {
+      message = enabled
+      enabled = true
+    } else if (typeof enabled === 'undefined') {
+      enabled = true
+    }
+    failMessage = message
+    showHelpOnFail = enabled
+    return self
+  }
+
+  self.fail = function (msg) {
+    if (fails.length) {
+      fails.forEach(function (f) {
+        f(msg)
+      })
+    } else {
+      if (showHelpOnFail) yargs.showHelp('error')
+      if (msg) console.error(msg)
+      if (failMessage) {
+        if (msg) console.error('')
+        console.error(failMessage)
+      }
+      if (yargs.getExitProcess()) {
+        process.exit(1)
+      } else {
+        throw new Error(msg)
+      }
+    }
+  }
+
+  // methods for ouputting/building help (usage) message.
+  var usage
+  self.usage = function (msg) {
+    usage = msg
+  }
+
+  var examples = []
+  self.example = function (cmd, description) {
+    examples.push([cmd, description || ''])
+  }
+
+  var commands = []
+  self.command = function (cmd, description) {
+    commands.push([cmd, description || ''])
+  }
+  self.getCommands = function () {
+    return commands
+  }
+
+  var descriptions = {}
+  self.describe = function (key, desc) {
+    if (typeof key === 'object') {
+      Object.keys(key).forEach(function (k) {
+        self.describe(k, key[k])
+      })
+    } else {
+      descriptions[key] = desc
+    }
+  }
+  self.getDescriptions = function () {
+    return descriptions
+  }
+
+  var epilog
+  self.epilog = function (msg) {
+    epilog = msg
+  }
+
+  var wrap = windowWidth()
+  self.wrap = function (cols) {
+    wrap = cols
+  }
+
+  self.help = function () {
+    normalizeAliases()
+
+    var demanded = yargs.getDemanded(),
+      options = yargs.getOptions(),
+      keys = Object.keys(
+        Object.keys(descriptions)
+        .concat(Object.keys(demanded))
+        .concat(Object.keys(options.default))
+        .reduce(function (acc, key) {
+          if (key !== '_') acc[key] = true
+          return acc
+        }, {})
+      ),
+      ui = cliui({
+        width: wrap,
+        wrap: !!wrap
+      })
+
+    // the usage string.
+    if (usage) {
+      var u = usage.replace(/\$0/g, yargs.$0)
+      ui.div(u + '\n')
+    }
+
+    // your application's commands, i.e., non-option
+    // arguments populated in '_'.
+    if (commands.length) {
+      ui.div('Commands:')
+
+      commands.forEach(function (command) {
+        ui.div(
+          {text: command[0], padding: [0, 2, 0, 2], width: maxWidth(commands) + 4},
+          {text: command[1]}
+        )
+      })
+
+      ui.div()
+    }
+
+    // the options table.
+    var aliasKeys = (Object.keys(options.alias) || [])
+      .concat(Object.keys(yargs.parsed.newAliases) || [])
+
+    keys = keys.filter(function (key) {
+      return !yargs.parsed.newAliases[key] && aliasKeys.every(function (alias) {
+        return (options.alias[alias] || []).indexOf(key) === -1
+      })
+    })
+
+    var switches = keys.reduce(function (acc, key) {
+      acc[key] = [ key ].concat(options.alias[key] || [])
+      .map(function (sw) {
+        return (sw.length > 1 ? '--' : '-') + sw
+      })
+      .join(', ')
+
+      return acc
+    }, {})
+
+    if (keys.length) {
+      ui.div('Options:')
+
+      keys.forEach(function (key) {
+        var kswitch = switches[key]
+        var desc = descriptions[key] || ''
+        var type = null
+
+        if (~options.boolean.indexOf(key)) type = '[boolean]'
+        if (~options.count.indexOf(key)) type = '[count]'
+        if (~options.string.indexOf(key)) type = '[string]'
+        if (~options.normalize.indexOf(key)) type = '[string]'
+        if (~options.array.indexOf(key)) type = '[array]'
+
+        var extra = [
+            type,
+            demanded[key] ? '[required]' : null,
+            defaultString(options.default[key], options.defaultDescription[key])
+          ].filter(Boolean).join(' ')
+
+        ui.span(
+          {text: kswitch, padding: [0, 2, 0, 2], width: maxWidth(switches) + 4},
+          desc
+        )
+
+        if (extra) ui.div({text: extra, padding: [0, 0, 0, 2], align: 'right'})
+        else ui.div()
+      })
+
+      ui.div()
+    }
+
+    // describe some common use-cases for your application.
+    if (examples.length) {
+      ui.div('Examples:')
+
+      examples.forEach(function (example) {
+        example[0] = example[0].replace(/\$0/g, yargs.$0)
+      })
+
+      examples.forEach(function (example) {
+        ui.div(
+          {text: example[0], padding: [0, 2, 0, 2], width: maxWidth(examples) + 4},
+          example[1]
+        )
+      })
+
+      ui.div()
+    }
+
+    // the usage string.
+    if (epilog) {
+      var e = epilog.replace(/\$0/g, yargs.$0)
+      ui.div(e + '\n')
+    }
+
+    return ui.toString()
+  }
+
+  // return the maximum width of a string
+  // in the left-hand column of a table.
+  function maxWidth (table) {
+    var width = 0
+
+    // table might be of the form [leftColumn],
+    // or {key: leftColumn}}
+    if (!Array.isArray(table)) {
+      table = Object.keys(table).map(function (key) {
+        return [table[key]]
+      })
+    }
+
+    table.forEach(function (v) {
+      width = Math.max(v[0].length, width)
+    })
+
+    // if we've enabled 'wrap' we should limit
+    // the max-width of the left-column.
+    if (wrap) width = Math.min(width, parseInt(wrap * 0.5, 10))
+
+    return width
+  }
+
+  // make sure any options set for aliases,
+  // are copied to the keys being aliased.
+  function normalizeAliases () {
+    var options = yargs.getOptions(),
+    demanded = yargs.getDemanded()
+
+    ;(Object.keys(options.alias) || []).forEach(function (key) {
+      options.alias[key].forEach(function (alias) {
+        // copy descriptions.
+        if (descriptions[alias]) self.describe(key, descriptions[alias])
+        // copy demanded.
+        if (demanded[alias]) yargs.demand(key, demanded[alias].msg)
+
+        // type messages.
+        if (~options.boolean.indexOf(alias)) yargs.boolean(key)
+        if (~options.count.indexOf(alias)) yargs.count(key)
+        if (~options.string.indexOf(alias)) yargs.string(key)
+        if (~options.normalize.indexOf(alias)) yargs.normalize(key)
+        if (~options.array.indexOf(alias)) yargs.array(key)
+      })
+    })
+  }
+
+  self.showHelp = function (level) {
+    level = level || 'error'
+    console[level](self.help())
+  }
+
+  self.functionDescription = function (fn, defaultDescription) {
+    if (defaultDescription) {
+      return defaultDescription
+    }
+    var description = fn.name ? decamelize(fn.name, '-') : 'generated-value'
+    return ['(', description, ')'].join('')
+  }
+
+  // format the default-value-string displayed in
+  // the right-hand column.
+  function defaultString (value, defaultDescription) {
+    var string = '[default: '
+
+    if (value === undefined) return null
+
+    if (defaultDescription) {
+      string += defaultDescription
+    } else {
+      switch (typeof value) {
+        case 'string':
+          string += JSON.stringify(value)
+          break
+        case 'object':
+          string += JSON.stringify(value)
+          break
+        default:
+          string += value
+      }
+    }
+
+    return string + ']'
+  }
+
+  // guess the width of the console window, max-width 80.
+  function windowWidth () {
+    return wsize.width ? Math.min(80, wsize.width) : null
+  }
+
+  // logic for displaying application version.
+  var version = null
+  self.version = function (ver, opt, msg) {
+    version = ver
+  }
+
+  self.showVersion = function () {
+    if (typeof version === 'function') console.log(version())
+    else console.log(version)
+  }
+
+  return self
+}

goTorrentWebUI/node_modules/webpack/node_modules/uglify-js/node_modules/yargs/lib/validation.js

@@ -0,0 +1,196 @@
+// validation-type-stuff, missing params,
+// bad implications, custom checks.
+module.exports = function (yargs, usage) {
+  var self = {}
+
+  // validate appropriate # of non-option
+  // arguments were provided, i.e., '_'.
+  self.nonOptionCount = function (argv) {
+    var demanded = yargs.getDemanded()
+
+    if (demanded._ && argv._.length < demanded._.count) {
+      if (demanded._.msg !== undefined) {
+        usage.fail(demanded._.msg)
+      } else {
+        usage.fail('Not enough non-option arguments: got '
+          + argv._.length + ', need at least ' + demanded._.count
+        )
+      }
+    }
+  }
+
+  // make sure that any args that require an
+  // value (--foo=bar), have a value.
+  self.missingArgumentValue = function (argv) {
+    var options = yargs.getOptions(),
+      defaultValues = [true, false, '']
+
+    if (options.requiresArg.length > 0) {
+      var missingRequiredArgs = []
+
+      options.requiresArg.forEach(function (key) {
+        var value = argv[key]
+
+        // if a value is explicitly requested,
+        // flag argument as missing if it does not
+        // look like foo=bar was entered.
+        if (~defaultValues.indexOf(value)
+        || (Array.isArray(value) && !value.length)) {
+          missingRequiredArgs.push(key)
+        }
+      })
+
+      if (missingRequiredArgs.length === 1) {
+        usage.fail('Missing argument value: ' + missingRequiredArgs[0])
+      } else if (missingRequiredArgs.length > 1) {
+        var message = 'Missing argument values: ' + missingRequiredArgs.join(', ')
+        usage.fail(message)
+      }
+    }
+  }
+
+  // make sure all the required arguments are present.
+  self.requiredArguments = function (argv) {
+    var demanded = yargs.getDemanded(),
+      missing = null
+
+    Object.keys(demanded).forEach(function (key) {
+      if (!argv.hasOwnProperty(key)) {
+        missing = missing || {}
+        missing[key] = demanded[key]
+      }
+    })
+
+    if (missing) {
+      var customMsgs = []
+      Object.keys(missing).forEach(function (key) {
+        var msg = missing[key].msg
+        if (msg && customMsgs.indexOf(msg) < 0) {
+          customMsgs.push(msg)
+        }
+      })
+
+      var customMsg = customMsgs.length ? '\n' + customMsgs.join('\n') : ''
+      usage.fail('Missing required arguments: ' + Object.keys(missing).join(', ') + customMsg)
+    }
+  }
+
+  // check for unknown arguments (strict-mode).
+  self.unknownArguments = function (argv, aliases) {
+    var descriptions = usage.getDescriptions(),
+      demanded = yargs.getDemanded(),
+      unknown = [],
+      aliasLookup = {}
+
+    Object.keys(aliases).forEach(function (key) {
+      aliases[key].forEach(function (alias) {
+        aliasLookup[alias] = key
+      })
+    })
+
+    Object.keys(argv).forEach(function (key) {
+      if (key !== '$0' && key !== '_' &&
+        !descriptions.hasOwnProperty(key) &&
+        !demanded.hasOwnProperty(key) &&
+        !aliasLookup.hasOwnProperty(key)) {
+        unknown.push(key)
+      }
+    })
+
+    if (unknown.length === 1) {
+      usage.fail('Unknown argument: ' + unknown[0])
+    } else if (unknown.length > 1) {
+      usage.fail('Unknown arguments: ' + unknown.join(', '))
+    }
+  }
+
+  // custom checks, added using the `check` option on yargs.
+  var checks = []
+  self.check = function (f) {
+    checks.push(f)
+  }
+
+  self.customChecks = function (argv, aliases) {
+    checks.forEach(function (f) {
+      try {
+        var result = f(argv, aliases)
+        if (!result) {
+          usage.fail('Argument check failed: ' + f.toString())
+        } else if (typeof result === 'string') {
+          usage.fail(result)
+        }
+      } catch (err) {
+        usage.fail(err.message ? err.message : err)
+      }
+    })
+  }
+
+  // check implications, argument foo implies => argument bar.
+  var implied = {}
+  self.implies = function (key, value) {
+    if (typeof key === 'object') {
+      Object.keys(key).forEach(function (k) {
+        self.implies(k, key[k])
+      })
+    } else {
+      implied[key] = value
+    }
+  }
+  self.getImplied = function () {
+    return implied
+  }
+
+  self.implications = function (argv) {
+    var implyFail = []
+
+    Object.keys(implied).forEach(function (key) {
+      var num,
+        origKey = key,
+        value = implied[key]
+
+      // 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)
+      }
+    })
+
+    if (implyFail.length) {
+      var msg = 'Implications failed:\n'
+
+      implyFail.forEach(function (key) {
+        msg += ('  ' + key + ' -> ' + implied[key])
+      })
+
+      usage.fail(msg)
+    }
+  }
+
+  return self
+}