content: 
  # This file helps to compute a version number in source trees obtained from
  # git-archive tarball (such as those provided by githubs download-from-tag
  # feature). Distribution tarballs (built by setup.py sdist) and build
  # directories (produced by setup.py build) will contain a much shorter file
  # that just contains the computed version number.
  
  # This file is released into the public domain. Generated by
  # versioneer-0.18 (https://github.com/warner/python-versioneer)
  
  """Git implementation of _version.py."""
  
  import errno
  import os
  import re
  import subprocess
  import sys
  
  
  def get_keywords():
      """Get the keywords needed to look up the version information."""
      # these strings will be replaced by git during git-archive.
      # setup.py/versioneer.py will grep for the variable names, so they must
      # each be defined on a line of their own. _version.py will just call
      # get_keywords().
      git_refnames = "$Format:%d$"
      git_full = "$Format:%H$"
      git_date = "$Format:%ci$"
      keywords = {"refnames": git_refnames, "full": git_full, "date": git_date}
      return keywords
  
  
  class VersioneerConfig:
      """Container for Versioneer configuration parameters."""
  
  
  def get_config():
      """Create, populate and return the VersioneerConfig() object."""
      # these strings are filled in when 'setup.py versioneer' creates
      # _version.py
      cfg = VersioneerConfig()
      cfg.VCS = "git"
      cfg.style = "pep440-pre"
      cfg.tag_prefix = ""
      cfg.parentdir_prefix = "ffsubsync-"
      cfg.versionfile_source = "ffsubsync/_version.py"
      cfg.verbose = False
      return cfg
  
  
  class NotThisMethod(Exception):
      """Exception raised if a method is not valid for the current scenario."""
  
  
  LONG_VERSION_PY = {}
  HANDLERS = {}
  
  
  def register_vcs_handler(vcs, method):  # decorator
      """Decorator to mark a method as the handler for a particular VCS."""
      def decorate(f):
          """Store f in HANDLERS[vcs][method]."""
          if vcs not in HANDLERS:
              HANDLERS[vcs] = {}
          HANDLERS[vcs][method] = f
          return f
      return decorate
  
  
  def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False,
                  env=None):
      """Call the given command(s)."""
      assert isinstance(commands, list)
      p = None
      for c in commands:
          try:
              dispcmd = str([c] + args)
              # remember shell=False, so use git.cmd on windows, not just git
              p = subprocess.Popen([c] + args, cwd=cwd, env=env,
                                   stdout=subprocess.PIPE,
                                   stderr=(subprocess.PIPE if hide_stderr
                                           else None))
              break
          except EnvironmentError:
              e = sys.exc_info()[1]
              if e.errno == errno.ENOENT:
                  continue
              if verbose:
                  print("unable to run %s" % dispcmd)
                  print(e)
              return None, None
      else:
          if verbose:
              print("unable to find command, tried %s" % (commands,))
          return None, None
      stdout = p.communicate()[0].strip()
      if sys.version_info[0] >= 3:
          stdout = stdout.decode()
      if p.returncode != 0:
          if verbose:
              print("unable to run %s (error)" % dispcmd)
              print("stdout was %s" % stdout)
          return None, p.returncode
      return stdout, p.returncode
  
  
  def versions_from_parentdir(parentdir_prefix, root, verbose):
      """Try to determine the version from the parent directory name.
  
      Source tarballs conventionally unpack into a directory that includes both
      the project name and a version string. We will also support searching up
      two directory levels for an appropriately named parent directory
      """
      rootdirs = []
  
      for i in range(3):
          dirname = os.path.basename(root)
          if dirname.startswith(parentdir_prefix):
              return {"version": dirname[len(parentdir_prefix):],
                      "full-revisionid": None,
                      "dirty": False, "error": None, "date": None}
          else:
              rootdirs.append(root)
              root = os.path.dirname(root)  # up a level
  
      if verbose:
          print("Tried directories %s but none started with prefix %s" %
                (str(rootdirs), parentdir_prefix))
      raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
  
  
  @register_vcs_handler("git", "get_keywords")
  def git_get_keywords(versionfile_abs):
      """Extract version information from the given file."""
      # the code embedded in _version.py can just fetch the value of these
      # keywords. When used from setup.py, we don't want to import _version.py,
      # so we do it with a regexp instead. This function is not used from
      # _version.py.
      keywords = {}
      try:
          f = open(versionfile_abs, "r")
          for line in f.readlines():
              if line.strip().startswith("git_refnames ="):
                  mo = re.search(r'=\s*"(.*)"', line)
                  if mo:
                      keywords["refnames"] = mo.group(1)
              if line.strip().startswith("git_full ="):
                  mo = re.search(r'=\s*"(.*)"', line)
                  if mo:
                      keywords["full"] = mo.group(1)
              if line.strip().startswith("git_date ="):
                  mo = re.search(r'=\s*"(.*)"', line)
                  if mo:
                      keywords["date"] = mo.group(1)
          f.close()
      except EnvironmentError:
          pass
      return keywords
  
  
  @register_vcs_handler("git", "keywords")
  def git_versions_from_keywords(keywords, tag_prefix, verbose):
      """Get version information from git keywords."""
      if not keywords:
          raise NotThisMethod("no keywords at all, weird")
      date = keywords.get("date")
      if date is not None:
          # git-2.2.0 added "%cI", which expands to an ISO-8601 -compliant
          # datestamp. However we prefer "%ci" (which expands to an "ISO-8601
          # -like" string, which we must then edit to make compliant), because
          # it's been around since git-1.5.3, and it's too difficult to
          # discover which version we're using, or to work around using an
          # older one.
          date = date.strip().replace(" ", "T", 1).replace(" ", "", 1)
      refnames = keywords["refnames"].strip()
      if refnames.startswith("$Format"):
          if verbose:
              print("keywords are unexpanded, not using")
          raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
      refs = set([r.strip() for r in refnames.strip("()").split(",")])
      # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
      # just "foo-1.0". If we see a "tag: " prefix, prefer those.
      TAG = "tag: "
      tags = set([r[len(TAG):] for r in refs if r.startswith(TAG)])
      if not tags:
          # Either we're using git < 1.8.3, or there really are no tags. We use
          # a heuristic: assume all version tags have a digit. The old git %d
          # expansion behaves like git log --decorate=short and strips out the
          # refs/heads/ and refs/tags/ prefixes that would let us distinguish
          # between branches and tags. By ignoring refnames without digits, we
          # filter out many common branch names like "release" and
          # "stabilization", as well as "HEAD" and "master".
          tags = set([r for r in refs if re.search(r'\d', r)])
          if verbose:
              print("discarding '%s', no digits" % ",".join(refs - tags))
      if verbose:
          print("likely tags: %s" % ",".join(sorted(tags)))
      for ref in sorted(tags):
          # sorting will prefer e.g. "2.0" over "2.0rc1"
          if ref.startswith(tag_prefix):
              r = ref[len(tag_prefix):]
              if verbose:
                  print("picking %s" % r)
              return {"version": r,
                      "full-revisionid": keywords["full"].strip(),
                      "dirty": False, "error": None,
                      "date": date}
      # no suitable tags, so version is "0+unknown", but full hex is still there
      if verbose:
          print("no suitable tags, using unknown + full revision id")
      return {"version": "0+unknown",
              "full-revisionid": keywords["full"].strip(),
              "dirty": False, "error": "no suitable tags", "date": None}
  
  
  @register_vcs_handler("git", "pieces_from_vcs")
  def git_pieces_from_vcs(tag_prefix, root, verbose, run_command=run_command):
      """Get version from 'git describe' in the root of the source tree.
  
      This only gets called if the git-archive 'subst' keywords were *not*
      expanded, and _version.py hasn't already been rewritten with a short
      version string, meaning we're inside a checked out source tree.
      """
      GITS = ["git"]
      if sys.platform == "win32":
          GITS = ["git.cmd", "git.exe"]
  
      out, rc = run_command(GITS, ["rev-parse", "--git-dir"], cwd=root,
                            hide_stderr=True)
      if rc != 0:
          if verbose:
              print("Directory %s not under git control" % root)
          raise NotThisMethod("'git rev-parse --git-dir' returned error")
  
      # if there is a tag matching tag_prefix, this yields TAG-NUM-gHEX[-dirty]
      # if there isn't one, this yields HEX[-dirty] (no NUM)
      describe_out, rc = run_command(GITS, ["describe", "--tags", "--dirty",
                                            "--always", "--long",
                                            "--match", "%s*" % tag_prefix],
                                     cwd=root)
      # --long was added in git-1.5.5
      if describe_out is None:
          raise NotThisMethod("'git describe' failed")
      describe_out = describe_out.strip()
      full_out, rc = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
      if full_out is None:
          raise NotThisMethod("'git rev-parse' failed")
      full_out = full_out.strip()
  
      pieces = {}
      pieces["long"] = full_out
      pieces["short"] = full_out[:7]  # maybe improved later
      pieces["error"] = None
  
      # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
      # TAG might have hyphens.
      git_describe = describe_out
  
      # look for -dirty suffix
      dirty = git_describe.endswith("-dirty")
      pieces["dirty"] = dirty
      if dirty:
          git_describe = git_describe[:git_describe.rindex("-dirty")]
  
      # now we have TAG-NUM-gHEX or HEX
  
      if "-" in git_describe:
          # TAG-NUM-gHEX
          mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
          if not mo:
              # unparseable. Maybe git-describe is misbehaving?
              pieces["error"] = ("unable to parse git-describe output: '%s'"
                                 % describe_out)
              return pieces
  
          # tag
          full_tag = mo.group(1)
          if not full_tag.startswith(tag_prefix):
              if verbose:
                  fmt = "tag '%s' doesn't start with prefix '%s'"
                  print(fmt % (full_tag, tag_prefix))
              pieces["error"] = ("tag '%s' doesn't start with prefix '%s'"
                                 % (full_tag, tag_prefix))
              return pieces
          pieces["closest-tag"] = full_tag[len(tag_prefix):]
  
          # distance: number of commits since tag
          pieces["distance"] = int(mo.group(2))
  
          # commit: short hex revision ID
          pieces["short"] = mo.group(3)
  
      else:
          # HEX: no tags
          pieces["closest-tag"] = None
          count_out, rc = run_command(GITS, ["rev-list", "HEAD", "--count"],
                                      cwd=root)
          pieces["distance"] = int(count_out)  # total number of commits
  
      # commit date: see ISO-8601 comment in git_versions_from_keywords()
      date = run_command(GITS, ["show", "-s", "--format=%ci", "HEAD"],
                         cwd=root)[0].strip()
      pieces["date"] = date.strip().replace(" ", "T", 1).replace(" ", "", 1)
  
      return pieces
  
  
  def plus_or_dot(pieces):
      """Return a + if we don't already have one, else return a ."""
      if "+" in pieces.get("closest-tag", ""):
          return "."
      return "+"
  
  
  def render_pep440(pieces):
      """Build up version string, with post-release "local version identifier".
  
      Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
      get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty
  
      Exceptions:
      1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]
      """
      if pieces["closest-tag"]:
          rendered = pieces["closest-tag"]
          if pieces["distance"] or pieces["dirty"]:
              rendered += plus_or_dot(pieces)
              rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
              if pieces["dirty"]:
                  rendered += ".dirty"
      else:
          # exception #1
          rendered = "0+untagged.%d.g%s" % (pieces["distance"],
                                            pieces["short"])
          if pieces["dirty"]:
              rendered += ".dirty"
      return rendered
  
  
  def render_pep440_pre(pieces):
      """TAG[.post.devDISTANCE] -- No -dirty.
  
      Exceptions:
      1: no tags. 0.post.devDISTANCE
      """
      if pieces["closest-tag"]:
          rendered = pieces["closest-tag"]
          if pieces["distance"]:
              rendered += ".post.dev%d" % pieces["distance"]
      else:
          # exception #1
          rendered = "0.post.dev%d" % pieces["distance"]
      return rendered
  
  
  def render_pep440_post(pieces):
      """TAG[.postDISTANCE[.dev0]+gHEX] .
  
      The ".dev0" means dirty. Note that .dev0 sorts backwards
      (a dirty tree will appear "older" than the corresponding clean one),
      but you shouldn't be releasing software with -dirty anyways.
  
      Exceptions:
      1: no tags. 0.postDISTANCE[.dev0]
      """
      if pieces["closest-tag"]:
          rendered = pieces["closest-tag"]
          if pieces["distance"] or pieces["dirty"]:
              rendered += ".post%d" % pieces["distance"]
              if pieces["dirty"]:
                  rendered += ".dev0"
              rendered += plus_or_dot(pieces)
              rendered += "g%s" % pieces["short"]
      else:
          # exception #1
          rendered = "0.post%d" % pieces["distance"]
          if pieces["dirty"]:
              rendered += ".dev0"
          rendered += "+g%s" % pieces["short"]
      return rendered
  
  
  def render_pep440_old(pieces):
      """TAG[.postDISTANCE[.dev0]] .
  
      The ".dev0" means dirty.
  
      Eexceptions:
      1: no tags. 0.postDISTANCE[.dev0]
      """
      if pieces["closest-tag"]:
          rendered = pieces["closest-tag"]
          if pieces["distance"] or pieces["dirty"]:
              rendered += ".post%d" % pieces["distance"]
              if pieces["dirty"]:
                  rendered += ".dev0"
      else:
          # exception #1
          rendered = "0.post%d" % pieces["distance"]
          if pieces["dirty"]:
              rendered += ".dev0"
      return rendered
  
  
  def render_git_describe(pieces):
      """TAG[-DISTANCE-gHEX][-dirty].
  
      Like 'git describe --tags --dirty --always'.
  
      Exceptions:
      1: no tags. HEX[-dirty]  (note: no 'g' prefix)
      """
      if pieces["closest-tag"]:
          rendered = pieces["closest-tag"]
          if pieces["distance"]:
              rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
      else:
          # exception #1
          rendered = pieces["short"]
      if pieces["dirty"]:
          rendered += "-dirty"
      return rendered
  
  
  def render_git_describe_long(pieces):
      """TAG-DISTANCE-gHEX[-dirty].
  
      Like 'git describe --tags --dirty --always -long'.
      The distance/hash is unconditional.
  
      Exceptions:
      1: no tags. HEX[-dirty]  (note: no 'g' prefix)
      """
      if pieces["closest-tag"]:
          rendered = pieces["closest-tag"]
          rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
      else:
          # exception #1
          rendered = pieces["short"]
      if pieces["dirty"]:
          rendered += "-dirty"
      return rendered
  
  
  def render(pieces, style):
      """Render the given version pieces into the requested style."""
      if pieces["error"]:
          return {"version": "unknown",
                  "full-revisionid": pieces.get("long"),
                  "dirty": None,
                  "error": pieces["error"],
                  "date": None}
  
      if not style or style == "default":
          style = "pep440"  # the default
  
      if style == "pep440":
          rendered = render_pep440(pieces)
      elif style == "pep440-pre":
          rendered = render_pep440_pre(pieces)
      elif style == "pep440-post":
          rendered = render_pep440_post(pieces)
      elif style == "pep440-old":
          rendered = render_pep440_old(pieces)
      elif style == "git-describe":
          rendered = render_git_describe(pieces)
      elif style == "git-describe-long":
          rendered = render_git_describe_long(pieces)
      else:
          raise ValueError("unknown style '%s'" % style)
  
      return {"version": rendered, "full-revisionid": pieces["long"],
              "dirty": pieces["dirty"], "error": None,
              "date": pieces.get("date")}
  
  
  def get_versions():
      """Get version information or return default if unable to do so."""
      # I am in _version.py, which lives at ROOT/VERSIONFILE_SOURCE. If we have
      # __file__, we can work backwards from there to the root. Some
      # py2exe/bbfreeze/non-CPython implementations don't do __file__, in which
      # case we can only use expanded keywords.
  
      cfg = get_config()
      verbose = cfg.verbose
  
      try:
          return git_versions_from_keywords(get_keywords(), cfg.tag_prefix,
                                            verbose)
      except NotThisMethod:
          pass
  
      try:
          root = os.path.realpath(__file__)
          # versionfile_source is the relative path from the top of the source
          # tree (where the .git directory might live) to this file. Invert
          # this to find the root from __file__.
          for i in cfg.versionfile_source.split('/'):
              root = os.path.dirname(root)
      except NameError:
          return {"version": "0+unknown", "full-revisionid": None,
                  "dirty": None,
                  "error": "unable to find root of source tree",
                  "date": None}
  
      try:
          pieces = git_pieces_from_vcs(cfg.tag_prefix, root, verbose)
          return render(pieces, cfg.style)
      except NotThisMethod:
          pass
  
      try:
          if cfg.parentdir_prefix:
              return versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
      except NotThisMethod:
          pass
  
      return {"version": "0+unknown", "full-revisionid": None,
              "dirty": None,
              "error": "unable to compute version", "date": None}
  