// Based on minimatch.js by isaacs <https://npmjs.org/package/minimatch>

  var platform = typeof process === "object" ? process.platform : "win32"

  if (module) module.exports = minimatch
  else exports.minimatch = minimatch

  minimatch.Minimatch = Minimatch

  var LRU = require("lru-cache")
    , cache = minimatch.cache = new LRU({max: 100})
    , GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}
    , sigmund = require("sigmund")

  var path = require("path")
    // any single thing other than /
    // don't need to escape / when using new RegExp()
    , qmark = "[^/]"

    // * => any number of characters
    , star = qmark + "*?"

    // ** when dots are allowed.  Anything goes, except .. and .
    // not (^ or / followed by one or two dots followed by $ or /),
    // followed by anything, any number of times.
    , twoStarDot = "(?:(?!(?:\\\/|^)(?:\\.{1,2})($|\\\/)).)*?"

    // not a ^ or / followed by a dot,
    // followed by anything, any number of times.
    , twoStarNoDot = "(?:(?!(?:\\\/|^)\\.).)*?"

    // characters that need to be escaped in RegExp.
    , reSpecials = charSet("().*{}+?[]^$\\!")

// "abc" -> { a:true, b:true, c:true }
  function charSet (s) {
    return s.split("").reduce(function (set, c) {
      set[c] = true
      return set
    }, {})
  }

// normalizes slashes.
  var slashSplit = /\/+/

  minimatch.monkeyPatch = monkeyPatch
  function monkeyPatch () {
    var desc = Object.getOwnPropertyDescriptor(String.prototype, "match")
    var orig = desc.value
    desc.value = function (p) {
      if (p instanceof Minimatch) return p.match(this)
      return orig.call(this, p)
    }
    Object.defineProperty(String.prototype, desc)
  }

  minimatch.filter = filter
  function filter (pattern, options) {
    options = options || {}
    return function (p, i, list) {
      return minimatch(p, pattern, options)
    }
  }

  function ext (a, b) {
    a = a || {}
    b = b || {}
    var t = {}
    Object.keys(b).forEach(function (k) {
      t[k] = b[k]
    })
    Object.keys(a).forEach(function (k) {
      t[k] = a[k]
    })
    return t
  }

  minimatch.defaults = function (def) {
    if (!def || !Object.keys(def).length) return minimatch

    var orig = minimatch

    var m = function minimatch (p, pattern, options) {
      return orig.minimatch(p, pattern, ext(def, options))
    }

    m.Minimatch = function Minimatch (pattern, options) {
      return new orig.Minimatch(pattern, ext(def, options))
    }

    return m
  }

  Minimatch.defaults = function (def) {
    if (!def || !Object.keys(def).length) return Minimatch
    return minimatch.defaults(def).Minimatch
  }


  function minimatch (p, pattern, options) {
    if (typeof pattern !== "string") {
      throw new TypeError("glob pattern string required")
    }

    if (!options) options = {}

        // shortcut: comments match nothing.
    if (!options.nocomment && pattern.charAt(0) === "#") {
      return false
    }

    // "" only matches ""
    if (pattern.trim() === "") return p === ""

    return new Minimatch(pattern, options).match(p)
  }

  function Minimatch (pattern, options) {
    if (!(this instanceof Minimatch)) {
      return new Minimatch(pattern, options, cache)
    }

    if (typeof pattern !== "string") {
      throw new TypeError("glob pattern string required")
    }

    if (!options) options = {}

        // windows: need to use /, not \
        // On other platforms, \ is a valid (albeit bad) filename char.
    if (platform === "win32") {
      pattern = pattern.split("\\").join("/")
    }

    // lru storage.
    // these things aren't particularly big, but walking down the string
    // and turning it into a regexp can get pretty costly.
    var cacheKey = pattern + "\n" + sigmund(options)
    var cached = minimatch.cache.get(cacheKey)
    if (cached) return cached
    minimatch.cache.set(cacheKey, this)

    this.options = options
    this.set = []
    this.pattern = pattern
    this.regexp = null
    this.negate = false
    this.comment = false
    this.empty = false

      // make the set of regexps etc.
    this.make()
  }

  Minimatch.prototype.make = make
  function make () {
    // don't do it more than once.
    if (this._made) return

    var pattern = this.pattern
    var options = this.options

      // empty patterns and comments match nothing.
    if (!options.nocomment && pattern.charAt(0) === "#") {
      this.comment = true
      return
    }
    if (!pattern) {
      this.empty = true
      return
    }

    // step 1: figure out negation, etc.
    this.parseNegate()

      // step 2: expand braces
    var set = this.globSet = this.braceExpand()

    if (options.debug) console.error(this.pattern, set)

        // step 3: now we have a set, so turn each one into a series of path-portion
        // matching patterns.
        // These will be regexps, except in the case of "**", which is
        // set to the GLOBSTAR object for globstar behavior,
        // and will not contain any / characters
    set = this.globParts = set.map(function (s) {
        return s.split(slashSplit)
      })

    if (options.debug) console.error(this.pattern, set)

        // glob --> regexps
    set = set.map(function (s, si, set) {
      return s.map(this.parse, this)
    }, this)

    if (options.debug) console.error(this.pattern, set)

        // filter out everything that didn't compile properly.
    set = set.filter(function (s) {
      return -1 === s.indexOf(false)
    })

    if (options.debug) console.error(this.pattern, set)

    this.set = set
  }

  Minimatch.prototype.parseNegate = parseNegate
  function parseNegate () {
    var pattern = this.pattern
      , negate = false
      , options = this.options
      , negateOffset = 0

    if (options.nonegate) return

    for ( var i = 0, l = pattern.length
      ; i < l && pattern.charAt(i) === "!"
      ; i ++) {
      negate = !negate
      negateOffset ++
    }

    if (negateOffset) this.pattern = pattern.substr(negateOffset)
    this.negate = negate
  }

// Brace expansion:
// a{b,c}d -> abd acd
// a{b,}c -> abc ac
// a{0..3}d -> a0d a1d a2d a3d
// a{b,c{d,e}f}g -> abg acdfg acefg
// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg
//
// Invalid sets are not expanded.
// a{2..}b -> a{2..}b
// a{b}c -> a{b}c
  minimatch.braceExpand = function (pattern, options) {
    return new Minimatch(pattern, options).braceExpand()
  }

  Minimatch.prototype.braceExpand = braceExpand
  function braceExpand (pattern, options) {
    options = options || this.options
    pattern = typeof pattern === "undefined"
        ? this.pattern : pattern

    if (typeof pattern === "undefined") {
      throw new Error("undefined pattern")
    }

    if (options.nobrace ||
      !pattern.match(/\{.*\}/)) {
      // shortcut. no need to expand.
      return [pattern]
    }

    var escaping = false

      // examples and comments refer to this crazy pattern:
      // a{b,c{d,e},{f,g}h}x{y,z}
      // expected:
      // abxy
      // abxz
      // acdxy
      // acdxz
      // acexy
      // acexz
      // afhxy
      // afhxz
      // aghxy
      // aghxz

      // everything before the first \{ is just a prefix.
      // So, we pluck that off, and work with the rest,
      // and then prepend it to everything we find.
    if (pattern.charAt(0) !== "{") {
      // console.error(pattern)
      var prefix = null
      for (var i = 0, l = pattern.length; i < l; i ++) {
        var c = pattern.charAt(i)
          // console.error(i, c)
        if (c === "\\") {
          escaping = !escaping
        } else if (c === "{" && !escaping) {
          prefix = pattern.substr(0, i)
          break
        }
      }

      // actually no sets, all { were escaped.
      if (prefix === null) {
        // console.error("no sets")
        return [pattern]
      }

      var tail = braceExpand(pattern.substr(i), options)
      return tail.map(function (t) {
        return prefix + t
      })
    }

    // now we have something like:
    // {b,c{d,e},{f,g}h}x{y,z}
    // walk through the set, expanding each part, until
    // the set ends.  then, we'll expand the suffix.
    // If the set only has a single member, then'll put the {} back

    // first, handle numeric sets, since they're easier
    var numset = pattern.match(/^\{(-?[0-9]+)\.\.(-?[0-9]+)\}/)
    if (numset) {
      // console.error("numset", numset[1], numset[2])
      var suf = braceExpand(pattern.substr(numset[0].length), options)
        , start = +numset[1]
        , end = +numset[2]
        , inc = start > end ? -1 : 1
        , set = []
      for (var i = start; i != (end + inc); i += inc) {
        // append all the suffixes
        for (var ii = 0, ll = suf.length; ii < ll; ii ++) {
          set.push(i + suf[ii])
        }
      }
      return set
    }

    // ok, walk through the set
    // We hope, somewhat optimistically, that there
    // will be a } at the end.
    // If the closing brace isn't found, then the pattern is
    // interpreted as braceExpand("\\" + pattern) so that
    // the leading \{ will be interpreted literally.
    var i = 1 // skip the \{
      , depth = 1
      , set = []
      , member = ""
      , sawEnd = false
      , escaping = false

    function addMember () {
      set.push(member)
      member = ""
    }

    // console.error("Entering for")
    FOR: for (i = 1, l = pattern.length; i < l; i ++) {
        var c = pattern.charAt(i)
          // console.error("", i, c)

        if (escaping) {
          escaping = false
          member += "\\" + c
        } else {
          switch (c) {
            case "\\":
              escaping = true
              continue

            case "{":
              depth ++
              member += "{"
              continue

            case "}":
              depth --
                // if this closes the actual set, then we're done
              if (depth === 0) {
                addMember()
                  // pluck off the close-brace
                i ++
                break FOR
              } else {
                member += c
                continue
              }

            case ",":
              if (depth === 1) {
                addMember()
              } else {
                member += c
              }
              continue

            default:
              member += c
              continue
          } // switch
        } // else
      } // for

    // now we've either finished the set, and the suffix is
    // pattern.substr(i), or we have *not* closed the set,
    // and need to escape the leading brace
    if (depth !== 0) {
      // console.error("didn't close", pattern)
      return braceExpand("\\" + pattern, options)
    }

    // x{y,z} -> ["xy", "xz"]
    // console.error("set", set)
    // console.error("suffix", pattern.substr(i))
    var suf = braceExpand(pattern.substr(i), options)
      // ["b", "c{d,e}","{f,g}h"] ->
      //   [["b"], ["cd", "ce"], ["fh", "gh"]]
    var addBraces = set.length === 1
      // console.error("set pre-expanded", set)
    set = set.map(function (p) {
      return braceExpand(p, options)
    })
      // console.error("set expanded", set)


      // [["b"], ["cd", "ce"], ["fh", "gh"]] ->
      //   ["b", "cd", "ce", "fh", "gh"]
    set = set.reduce(function (l, r) {
      return l.concat(r)
    })

    if (addBraces) {
      set = set.map(function (s) {
        return "{" + s + "}"
      })
    }

    // now attach the suffixes.
    var ret = []
    for (var i = 0, l = set.length; i < l; i ++) {
      for (var ii = 0, ll = suf.length; ii < ll; ii ++) {
        ret.push(set[i] + suf[ii])
      }
    }
    return ret
  }

// parse a component of the expanded set.
// At this point, no pattern may contain "/" in it
// so we're going to return a 2d array, where each entry is the full
// pattern, split on '/', and then turned into a regular expression.
// A regexp is made at the end which joins each array with an
// escaped /, and another full one which joins each regexp with |.
//
// Following the lead of Bash 4.1, note that "**" only has special meaning
// when it is the *only* thing in a path portion.  Otherwise, any series
// of * is equivalent to a single *.  Globstar behavior is enabled by
// default, and can be disabled by setting options.noglobstar.
  Minimatch.prototype.parse = parse
  var SUBPARSE = {}
  function parse (pattern, isSub) {
    var options = this.options

      // shortcuts
    if (!options.noglobstar && pattern === "**") return GLOBSTAR
    if (pattern === "") return ""

    var re = ""
      , hasMagic = !!options.nocase
      , escaping = false
      // ? => one single character
      , patternListStack = []
      , plType
      , stateChar
      , inClass = false
      , reClassStart = -1
      , classStart = -1
      // . and .. never match anything that doesn't start with .,
      // even when options.dot is set.
      , patternStart = pattern.charAt(0) === "." ? "" // anything
        // not (start or / followed by . or .. followed by / or end)
        : options.dot ? "(?!(?:^|\\\/)\\.{1,2}(?:$|\\\/))"
          : "(?!\\.)"

    function clearStateChar () {
      if (stateChar) {
        // we had some state-tracking character
        // that wasn't consumed by this pass.
        switch (stateChar) {
          case "*":
            re += star
            hasMagic = true
            break
          case "?":
            re += qmark
            hasMagic = true
            break
          default:
            re += "\\"+stateChar
            break
        }
        stateChar = false
      }
    }

    for ( var i = 0, len = pattern.length, c
      ; (i < len) && (c = pattern.charAt(i))
      ; i ++ ) {

      if (options.debug) {
        console.error("%s\t%s %s %j", pattern, i, re, c)
      }

      // skip over any that are escaped.
      if (escaping && reSpecials[c]) {
        re += "\\" + c
        escaping = false
        continue
      }

      SWITCH: switch (c) {
          case "/":
            // completely not allowed, even escaped.
            // Should already be path-split by now.
            return false

          case "\\":
            clearStateChar()
            escaping = true
            continue

          // the various stateChar values
          // for the "extglob" stuff.
          case "?":
          case "*":
          case "+":
          case "@":
          case "!":
            if (options.debug) {
              console.error("%s\t%s %s %j <-- stateChar", pattern, i, re, c)
            }

            // all of those are literals inside a class, except that
            // the glob [!a] means [^a] in regexp
            if (inClass) {
              if (c === "!" && i === classStart + 1) c = "^"
              re += c
              continue
            }

            // if we already have a stateChar, then it means
            // that there was something like ** or +? in there.
            // Handle the stateChar, then proceed with this one.
            clearStateChar()
            stateChar = c
              // if extglob is disabled, then +(asdf|foo) isn't a thing.
              // just clear the statechar *now*, rather than even diving into
              // the patternList stuff.
            if (options.noext) clearStateChar()
            continue

          case "(":
            if (inClass) {
              re += "("
              continue
            }

            if (!stateChar) {
              re += "\\("
              continue
            }

            plType = stateChar
            patternListStack.push({ type: plType
              , start: i - 1
              , reStart: re.length })
              // negation is (?:(?!js)[^/]*)
            re += stateChar === "!" ? "(?:(?!" : "(?:"
            stateChar = false
            continue

          case ")":
            if (inClass || !patternListStack.length) {
              re += "\\)"
              continue
            }

            hasMagic = true
            re += ")"
            plType = patternListStack.pop().type
              // negation is (?:(?!js)[^/]*)
              // The others are (?:<pattern>)<type>
            switch (plType) {
              case "!":
                re += "[^/]*?)"
                break
              case "?":
              case "+":
              case "*": re += plType
              case "@": break // the default anyway
            }
            continue

          case "|":
            if (inClass || !patternListStack.length || escaping) {
              re += "\\|"
              escaping = false
              continue
            }

            re += "|"
            continue

          // these are mostly the same in regexp and glob
          case "[":
            // swallow any state-tracking char before the [
            clearStateChar()

            if (inClass) {
              re += "\\" + c
              continue
            }

            inClass = true
            classStart = i
            reClassStart = re.length
            re += c
            continue

          case "]":
            //  a right bracket shall lose its special
            //  meaning and represent itself in
            //  a bracket expression if it occurs
            //  first in the list.  -- POSIX.2 2.8.3.2
            if (i === classStart + 1 || !inClass) {
              re += "\\" + c
              escaping = false
              continue
            }

            // finish up the class.
            hasMagic = true
            inClass = false
            re += c
            continue

          default:
            // swallow any state char that wasn't consumed
            clearStateChar()

            if (escaping) {
              // no need
              escaping = false
            } else if (reSpecials[c]
              && !(c === "^" && inClass)) {
              re += "\\"
            }

            re += c

        } // switch
    } // for


    // handle the case where we left a class open.
    // "[abc" is valid, equivalent to "\[abc"
    if (inClass) {
      // split where the last [ was, and escape it
      // this is a huge pita.  We now have to re-walk
      // the contents of the would-be class to re-translate
      // any characters that were passed through as-is
      var cs = pattern.substr(classStart + 1)
        , sp = this.parse(cs, SUBPARSE)
      re = re.substr(0, reClassStart) + "\\[" + sp[0]
      hasMagic = hasMagic || sp[1]
    }

    // handle the case where we had a +( thing at the *end*
    // of the pattern.
    // each pattern list stack adds 3 chars, and we need to go through
    // and escape any | chars that were passed through as-is for the regexp.
    // Go through and escape them, taking care not to double-escape any
    // | chars that were already escaped.
    var pl
    while (pl = patternListStack.pop()) {
      var tail = re.slice(pl.reStart + 3)
        // maybe some even number of \, then maybe 1 \, followed by a |
      tail = tail.replace(/((?:\\{2})*)(\\?)\|/g, function (_, $1, $2) {
        if (!$2) {
          // the | isn't already escaped, so escape it.
          $2 = "\\"
        }

        // need to escape all those slashes *again*, without escaping the
        // one that we need for escaping the | character.  As it works out,
        // escaping an even number of slashes can be done by simply repeating
        // it exactly after itself.  That's why this trick works.
        //
        // I am sorry that you have to see this.
        return $1 + $1 + $2 + "|"
      })

        // console.error("tail=%j\n   %s", tail, tail)
      var t = pl.type === "*" ? star
          : pl.type === "?" ? qmark
            : "\\" + pl.type

      hasMagic = true
      re = re.slice(0, pl.reStart)
        + t + "\\("
        + tail
    }

    // handle trailing things that only matter at the very end.
    clearStateChar()
    if (escaping) {
      // trailing \\
      re += "\\\\"
    }

    // only need to apply the nodot start if the re starts with
    // something that could conceivably capture a dot
    var addPatternStart = false
    switch (re.charAt(0)) {
      case ".":
      case "[":
      case "(": addPatternStart = true
    }

    // if the re is not "" at this point, then we need to make sure
    // it doesn't match against an empty path part.
    // Otherwise a/* will match a/, which it should not.
    if (re !== "" && hasMagic) re = "(?=.)" + re

    if (addPatternStart) re = patternStart + re

        // parsing just a piece of a larger pattern.
    if (isSub === SUBPARSE) {
      return [ re, hasMagic ]
    }

    // skip the regexp for non-magical patterns
    // unescape anything in it, though, so that it'll be
    // an exact match against a file etc.
    if (!hasMagic) {
      return globUnescape(pattern)
    }

    var flags = options.nocase ? "i" : ""
      , regExp = new RegExp("^" + re + "$", flags)

    regExp._glob = pattern
    regExp._src = re

    return regExp
  }

  minimatch.makeRe = function (pattern, options) {
    return new Minimatch(pattern, options || {}).makeRe()
  }

  Minimatch.prototype.makeRe = makeRe
  function makeRe () {
    if (this.regexp || this.regexp === false) return this.regexp

        // at this point, this.set is a 2d array of partial
        // pattern strings, or "**".
        //
        // It's better to use .match().  This function shouldn't
        // be used, really, but it's pretty convenient sometimes,
        // when you just want to work with a regex.
    var set = this.set

    if (!set.length) return this.regexp = false
    var options = this.options

    var twoStar = options.noglobstar ? star
        : options.dot ? twoStarDot
          : twoStarNoDot
      , flags = options.nocase ? "i" : ""

    var re = set.map(function (pattern) {
      return pattern.map(function (p) {
        return (p === GLOBSTAR) ? twoStar
            : (typeof p === "string") ? regExpEscape(p)
              : p._src
      }).join("\\\/")
    }).join("|")

      // must match entire pattern
      // ending in a * or ** will make it less strict.
    re = "^(?:" + re + ")$"

      // can match anything, as long as it's not this.
    if (this.negate) re = "^(?!" + re + ").*$"

    try {
      return this.regexp = new RegExp(re, flags)
    } catch (ex) {
        return this.regexp = false
      }
  }

  minimatch.match = function (list, pattern, options) {
    var mm = new Minimatch(pattern, options)
    list = list.filter(function (f) {
      return mm.match(f)
    })
    if (options.nonull && !list.length) {
      list.push(pattern)
    }
    return list
  }

  Minimatch.prototype.match = match
  function match (f, partial) {
    // console.error("match", f, this.pattern)
    // short-circuit in the case of busted things.
    // comments, etc.
    if (this.comment) return false
    if (this.empty) return f === ""

    if (f === "/" && partial) return true

    var options = this.options

      // windows: need to use /, not \
      // On other platforms, \ is a valid (albeit bad) filename char.
    if (platform === "win32") {
      f = f.split("\\").join("/")
    }

    // treat the test path as a set of pathparts.
    f = f.split(slashSplit)
    if (options.debug) {
      console.error(this.pattern, "split", f)
    }

    // just ONE of the pattern sets in this.set needs to match
    // in order for it to be valid.  If negating, then just one
    // match means that we have failed.
    // Either way, return on the first hit.

    var set = this.set
      // console.error(this.pattern, "set", set)

    for (var i = 0, l = set.length; i < l; i ++) {
      var pattern = set[i]
      var hit = this.matchOne(f, pattern, partial)
      if (hit) {
        if (options.flipNegate) return true
        return !this.negate
      }
    }

    // didn't get any hits.  this is success if it's a negative
    // pattern, failure otherwise.
    if (options.flipNegate) return false
    return this.negate
  }

// set partial to true to test if, for example,
// "/a/b" matches the start of "/*/b/*/d"
// Partial means, if you run out of file before you run
// out of pattern, then that's fine, as long as all
// the parts match.
  Minimatch.prototype.matchOne = function (file, pattern, partial) {
    var options = this.options

    if (options.debug) {
      console.error("matchOne",
      { "this": this
        , file: file
        , pattern: pattern })
    }

    if (options.matchBase && pattern.length === 1) {
      file = path.basename(file.join("/")).split("/")
    }

    if (options.debug) {
      console.error("matchOne", file.length, pattern.length)
    }

    for ( var fi = 0
        , pi = 0
        , fl = file.length
        , pl = pattern.length
      ; (fi < fl) && (pi < pl)
      ; fi ++, pi ++ ) {

      if (options.debug) {
        console.error("matchOne loop")
      }
      var p = pattern[pi]
        , f = file[fi]

      if (options.debug) {
        console.error(pattern, p, f)
      }

      // should be impossible.
      // some invalid regexp stuff in the set.
      if (p === false) return false

      if (p === GLOBSTAR) {
        if (options.debug)
          console.error('GLOBSTAR', [pattern, p, f])

            // "**"
            // a/**/b/**/c would match the following:
            // a/b/x/y/z/c
            // a/x/y/z/b/c
            // a/b/x/b/x/c
            // a/b/c
            // To do this, take the rest of the pattern after
            // the **, and see if it would match the file remainder.
            // If so, return success.
            // If not, the ** "swallows" a segment, and try again.
            // This is recursively awful.
            //
            // a/**/b/**/c matching a/b/x/y/z/c
            // - a matches a
            // - doublestar
            //   - matchOne(b/x/y/z/c, b/**/c)
            //     - b matches b
            //     - doublestar
            //       - matchOne(x/y/z/c, c) -> no
            //       - matchOne(y/z/c, c) -> no
            //       - matchOne(z/c, c) -> no
            //       - matchOne(c, c) yes, hit
        var fr = fi
          , pr = pi + 1
        if (pr === pl) {
          if (options.debug)
            console.error('** at the end')
              // a ** at the end will just swallow the rest.
              // We have found a match.
              // however, it will not swallow /.x, unless
              // options.dot is set.
              // . and .. are *never* matched by **, for explosively
              // exponential reasons.
          for ( ; fi < fl; fi ++) {
            if (file[fi] === "." || file[fi] === ".." ||
            (!options.dot && file[fi].charAt(0) === ".")) return false
          }
          return true
        }

        // ok, let's see if we can swallow whatever we can.
        WHILE: while (fr < fl) {
            var swallowee = file[fr]

            if (options.debug) {
              console.error('\nglobstar while',
                file, fr, pattern, pr, swallowee)
            }

            // XXX remove this slice.  Just pass the start index.
            if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {
              if (options.debug)
                console.error('globstar found match!', fr, fl, swallowee)
                  // found a match.
              return true
            } else {
              // can't swallow "." or ".." ever.
              // can only swallow ".foo" when explicitly asked.
              if (swallowee === "." || swallowee === ".." ||
              (!options.dot && swallowee.charAt(0) === ".")) {
                if (options.debug)
                  console.error("dot detected!", file, fr, pattern, pr)
                break WHILE
              }

              // ** swallows a segment, and continue.
              if (options.debug)
                console.error('globstar swallow a segment, and continue')
              fr ++
            }
          }
        // no match was found.
        // However, in partial mode, we can't say this is necessarily over.
        // If there's more *pattern* left, then
        if (partial) {
          // ran out of file
          // console.error("\n>>> no match, partial?", file, fr, pattern, pr)
          if (fr === fl) return true
        }
        return false
      }

      // something other than **
      // non-magic patterns just have to match exactly
      // patterns with magic have been turned into regexps.
      var hit
      if (typeof p === "string") {
        if (options.nocase) {
          hit = f.toLowerCase() === p.toLowerCase()
        } else {
          hit = f === p
        }
        if (options.debug) {
          console.error("string match", p, f, hit)
        }
      } else {
        hit = f.match(p)
        if (options.debug) {
          console.error("pattern match", p, f, hit)
        }
      }

      if (!hit) return false
    }

    // Note: ending in / means that we'll get a final ""
    // at the end of the pattern.  This can only match a
    // corresponding "" at the end of the file.
    // If the file ends in /, then it can only match a
    // a pattern that ends in /, unless the pattern just
    // doesn't have any more for it. But, a/b/ should *not*
    // match "a/b/*", even though "" matches against the
    // [^/]*? pattern, except in partial mode, where it might
    // simply not be reached yet.
    // However, a/b/ should still satisfy a/*

    // now either we fell off the end of the pattern, or we're done.
    if (fi === fl && pi === pl) {
      // ran out of pattern and filename at the same time.
      // an exact hit!
      return true
    } else if (fi === fl) {
      // ran out of file, but still had pattern left.
      // this is ok if we're doing the match as part of
      // a glob fs traversal.
      return partial
    } else if (pi === pl) {
      // ran out of pattern, still have file left.
      // this is only acceptable if we're on the very last
      // empty segment of a file with a trailing slash.
      // a/* should match a/b/
      var emptyFileEnd = (fi === fl - 1) && (file[fi] === "")
      return emptyFileEnd
    }

    // should be unreachable.
    throw new Error("wtf?")
  }


// replace stuff like \* with *
  function globUnescape (s) {
    return s.replace(/\\(.)/g, "$1")
  }


  function regExpEscape (s) {
    return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&")
  }