content: 
  # Version: 0.22
  
  """The Versioneer - like a rocketeer, but for versions.
  
  The Versioneer
  ==============
  
  * like a rocketeer, but for versions!
  * https://github.com/python-versioneer/python-versioneer
  * Brian Warner
  * License: Public Domain
  * Compatible with: Python 3.6, 3.7, 3.8, 3.9, 3.10 and pypy3
  * [![Latest Version][pypi-image]][pypi-url]
  * [![Build Status][travis-image]][travis-url]
  
  This is a tool for managing a recorded version number in distutils/setuptools-based
  python projects. The goal is to remove the tedious and error-prone "update
  the embedded version string" step from your release process. Making a new
  release should be as easy as recording a new tag in your version-control
  system, and maybe making new tarballs.
  
  
  ## Quick Install
  
  * `pip install versioneer` to somewhere in your $PATH
  * add a `[versioneer]` section to your setup.cfg (see [Install](INSTALL.md))
  * run `versioneer install` in your source tree, commit the results
  * Verify version information with `python setup.py version`
  
  ## Version Identifiers
  
  Source trees come from a variety of places:
  
  * a version-control system checkout (mostly used by developers)
  * a nightly tarball, produced by build automation
  * a snapshot tarball, produced by a web-based VCS browser, like github's
    "tarball from tag" feature
  * a release tarball, produced by "setup.py sdist", distributed through PyPI
  
  Within each source tree, the version identifier (either a string or a number,
  this tool is format-agnostic) can come from a variety of places:
  
  * ask the VCS tool itself, e.g. "git describe" (for checkouts), which knows
    about recent "tags" and an absolute revision-id
  * the name of the directory into which the tarball was unpacked
  * an expanded VCS keyword ($Id$, etc)
  * a `_version.py` created by some earlier build step
  
  For released software, the version identifier is closely related to a VCS
  tag. Some projects use tag names that include more than just the version
  string (e.g. "myproject-1.2" instead of just "1.2"), in which case the tool
  needs to strip the tag prefix to extract the version identifier. For
  unreleased software (between tags), the version identifier should provide
  enough information to help developers recreate the same tree, while also
  giving them an idea of roughly how old the tree is (after version 1.2, before
  version 1.3). Many VCS systems can report a description that captures this,
  for example `git describe --tags --dirty --always` reports things like
  "0.7-1-g574ab98-dirty" to indicate that the checkout is one revision past the
  0.7 tag, has a unique revision id of "574ab98", and is "dirty" (it has
  uncommitted changes).
  
  The version identifier is used for multiple purposes:
  
  * to allow the module to self-identify its version: `myproject.__version__`
  * to choose a name and prefix for a 'setup.py sdist' tarball
  
  ## Theory of Operation
  
  Versioneer works by adding a special `_version.py` file into your source
  tree, where your `__init__.py` can import it. This `_version.py` knows how to
  dynamically ask the VCS tool for version information at import time.
  
  `_version.py` also contains `$Revision$` markers, and the installation
  process marks `_version.py` to have this marker rewritten with a tag name
  during the `git archive` command. As a result, generated tarballs will
  contain enough information to get the proper version.
  
  To allow `setup.py` to compute a version too, a `versioneer.py` is added to
  the top level of your source tree, next to `setup.py` and the `setup.cfg`
  that configures it. This overrides several distutils/setuptools commands to
  compute the version when invoked, and changes `setup.py build` and `setup.py
  sdist` to replace `_version.py` with a small static file that contains just
  the generated version data.
  
  ## Installation
  
  See [INSTALL.md](./INSTALL.md) for detailed installation instructions.
  
  ## Version-String Flavors
  
  Code which uses Versioneer can learn about its version string at runtime by
  importing `_version` from your main `__init__.py` file and running the
  `get_versions()` function. From the "outside" (e.g. in `setup.py`), you can
  import the top-level `versioneer.py` and run `get_versions()`.
  
  Both functions return a dictionary with different flavors of version
  information:
  
  * `['version']`: A condensed version string, rendered using the selected
    style. This is the most commonly used value for the project's version
    string. The default "pep440" style yields strings like `0.11`,
    `0.11+2.g1076c97`, or `0.11+2.g1076c97.dirty`. See the "Styles" section
    below for alternative styles.
  
  * `['full-revisionid']`: detailed revision identifier. For Git, this is the
    full SHA1 commit id, e.g. "1076c978a8d3cfc70f408fe5974aa6c092c949ac".
  
  * `['date']`: Date and time of the latest `HEAD` commit. For Git, it is the
    commit date in ISO 8601 format. This will be None if the date is not
    available.
  
  * `['dirty']`: a boolean, True if the tree has uncommitted changes. Note that
    this is only accurate if run in a VCS checkout, otherwise it is likely to
    be False or None
  
  * `['error']`: if the version string could not be computed, this will be set
    to a string describing the problem, otherwise it will be None. It may be
    useful to throw an exception in setup.py if this is set, to avoid e.g.
    creating tarballs with a version string of "unknown".
  
  Some variants are more useful than others. Including `full-revisionid` in a
  bug report should allow developers to reconstruct the exact code being tested
  (or indicate the presence of local changes that should be shared with the
  developers). `version` is suitable for display in an "about" box or a CLI
  `--version` output: it can be easily compared against release notes and lists
  of bugs fixed in various releases.
  
  The installer adds the following text to your `__init__.py` to place a basic
  version in `YOURPROJECT.__version__`:
  
      from ._version import get_versions
      __version__ = get_versions()['version']
      del get_versions
  
  ## Styles
  
  The setup.cfg `style=` configuration controls how the VCS information is
  rendered into a version string.
  
  The default style, "pep440", produces a PEP440-compliant string, equal to the
  un-prefixed tag name for actual releases, and containing an additional "local
  version" section with more detail for in-between builds. For Git, this is
  TAG[+DISTANCE.gHEX[.dirty]] , using information from `git describe --tags
  --dirty --always`. For example "0.11+2.g1076c97.dirty" indicates that the
  tree is like the "1076c97" commit but has uncommitted changes (".dirty"), and
  that this commit is two revisions ("+2") beyond the "0.11" tag. For released
  software (exactly equal to a known tag), the identifier will only contain the
  stripped tag, e.g. "0.11".
  
  Other styles are available. See [details.md](details.md) in the Versioneer
  source tree for descriptions.
  
  ## Debugging
  
  Versioneer tries to avoid fatal errors: if something goes wrong, it will tend
  to return a version of "0+unknown". To investigate the problem, run `setup.py
  version`, which will run the version-lookup code in a verbose mode, and will
  display the full contents of `get_versions()` (including the `error` string,
  which may help identify what went wrong).
  
  ## Known Limitations
  
  Some situations are known to cause problems for Versioneer. This details the
  most significant ones. More can be found on Github
  [issues page](https://github.com/python-versioneer/python-versioneer/issues).
  
  ### Subprojects
  
  Versioneer has limited support for source trees in which `setup.py` is not in
  the root directory (e.g. `setup.py` and `.git/` are *not* siblings). The are
  two common reasons why `setup.py` might not be in the root:
  
  * Source trees which contain multiple subprojects, such as
    [Buildbot](https://github.com/buildbot/buildbot), which contains both
    "master" and "slave" subprojects, each with their own `setup.py`,
    `setup.cfg`, and `tox.ini`. Projects like these produce multiple PyPI
    distributions (and upload multiple independently-installable tarballs).
  * Source trees whose main purpose is to contain a C library, but which also
    provide bindings to Python (and perhaps other languages) in subdirectories.
  
  Versioneer will look for `.git` in parent directories, and most operations
  should get the right version string. However `pip` and `setuptools` have bugs
  and implementation details which frequently cause `pip install .` from a
  subproject directory to fail to find a correct version string (so it usually
  defaults to `0+unknown`).
  
  `pip install --editable .` should work correctly. `setup.py install` might
  work too.
  
  Pip-8.1.1 is known to have this problem, but hopefully it will get fixed in
  some later version.
  
  [Bug #38](https://github.com/python-versioneer/python-versioneer/issues/38) is tracking
  this issue. The discussion in
  [PR #61](https://github.com/python-versioneer/python-versioneer/pull/61) describes the
  issue from the Versioneer side in more detail.
  [pip PR#3176](https://github.com/pypa/pip/pull/3176) and
  [pip PR#3615](https://github.com/pypa/pip/pull/3615) contain work to improve
  pip to let Versioneer work correctly.
  
  Versioneer-0.16 and earlier only looked for a `.git` directory next to the
  `setup.cfg`, so subprojects were completely unsupported with those releases.
  
  ### Editable installs with setuptools <= 18.5
  
  `setup.py develop` and `pip install --editable .` allow you to install a
  project into a virtualenv once, then continue editing the source code (and
  test) without re-installing after every change.
  
  "Entry-point scripts" (`setup(entry_points={"console_scripts": ..})`) are a
  convenient way to specify executable scripts that should be installed along
  with the python package.
  
  These both work as expected when using modern setuptools. When using
  setuptools-18.5 or earlier, however, certain operations will cause
  `pkg_resources.DistributionNotFound` errors when running the entrypoint
  script, which must be resolved by re-installing the package. This happens
  when the install happens with one version, then the egg_info data is
  regenerated while a different version is checked out. Many setup.py commands
  cause egg_info to be rebuilt (including `sdist`, `wheel`, and installing into
  a different virtualenv), so this can be surprising.
  
  [Bug #83](https://github.com/python-versioneer/python-versioneer/issues/83) describes
  this one, but upgrading to a newer version of setuptools should probably
  resolve it.
  
  
  ## Updating Versioneer
  
  To upgrade your project to a new release of Versioneer, do the following:
  
  * install the new Versioneer (`pip install -U versioneer` or equivalent)
  * edit `setup.cfg`, if necessary, to include any new configuration settings
    indicated by the release notes. See [UPGRADING](./UPGRADING.md) for details.
  * re-run `versioneer install` in your source tree, to replace
    `SRC/_version.py`
  * commit any changed files
  
  ## Future Directions
  
  This tool is designed to make it easily extended to other version-control
  systems: all VCS-specific components are in separate directories like
  src/git/ . The top-level `versioneer.py` script is assembled from these
  components by running make-versioneer.py . In the future, make-versioneer.py
  will take a VCS name as an argument, and will construct a version of
  `versioneer.py` that is specific to the given VCS. It might also take the
  configuration arguments that are currently provided manually during
  installation by editing setup.py . Alternatively, it might go the other
  direction and include code from all supported VCS systems, reducing the
  number of intermediate scripts.
  
  ## Similar projects
  
  * [setuptools_scm](https://github.com/pypa/setuptools_scm/) - a non-vendored build-time
    dependency
  * [minver](https://github.com/jbweston/miniver) - a lightweight reimplementation of
    versioneer
  * [versioningit](https://github.com/jwodder/versioningit) - a PEP 518-based setuptools
    plugin
  
  ## License
  
  To make Versioneer easier to embed, all its code is dedicated to the public
  domain. The `_version.py` that it creates is also in the public domain.
  Specifically, both are released under the Creative Commons "Public Domain
  Dedication" license (CC0-1.0), as described in
  https://creativecommons.org/publicdomain/zero/1.0/ .
  
  [pypi-image]: https://img.shields.io/pypi/v/versioneer.svg
  [pypi-url]: https://pypi.python.org/pypi/versioneer/
  [travis-image]:
  https://img.shields.io/travis/com/python-versioneer/python-versioneer.svg
  [travis-url]: https://travis-ci.com/github/python-versioneer/python-versioneer
  
  """
  # pylint:disable=invalid-name,import-outside-toplevel,missing-function-docstring
  # pylint:disable=missing-class-docstring,too-many-branches,too-many-statements
  # pylint:disable=raise-missing-from,too-many-lines,too-many-locals,import-error
  # pylint:disable=too-few-public-methods,redefined-outer-name,consider-using-with
  # pylint:disable=attribute-defined-outside-init,too-many-arguments
  
  import configparser
  import errno
  import json
  import os
  import re
  import subprocess
  import sys
  from typing import Callable, Dict
  import functools
  
  
  class VersioneerConfig:
      """Container for Versioneer configuration parameters."""
  
  
  def get_root():
      """Get the project root directory.
  
      We require that all commands are run from the project root, i.e. the
      directory that contains setup.py, setup.cfg, and versioneer.py .
      """
      root = os.path.realpath(os.path.abspath(os.getcwd()))
      setup_py = os.path.join(root, "setup.py")
      versioneer_py = os.path.join(root, "versioneer.py")
      if not (os.path.exists(setup_py) or os.path.exists(versioneer_py)):
          # allow 'python path/to/setup.py COMMAND'
          root = os.path.dirname(os.path.realpath(os.path.abspath(sys.argv[0])))
          setup_py = os.path.join(root, "setup.py")
          versioneer_py = os.path.join(root, "versioneer.py")
      if not (os.path.exists(setup_py) or os.path.exists(versioneer_py)):
          err = ("Versioneer was unable to run the project root directory. "
                 "Versioneer requires setup.py to be executed from "
                 "its immediate directory (like 'python setup.py COMMAND'), "
                 "or in a way that lets it use sys.argv[0] to find the root "
                 "(like 'python path/to/setup.py COMMAND').")
          raise VersioneerBadRootError(err)
      try:
          # Certain runtime workflows (setup.py install/develop in a setuptools
          # tree) execute all dependencies in a single python process, so
          # "versioneer" may be imported multiple times, and python's shared
          # module-import table will cache the first one. So we can't use
          # os.path.dirname(__file__), as that will find whichever
          # versioneer.py was first imported, even in later projects.
          my_path = os.path.realpath(os.path.abspath(__file__))
          me_dir = os.path.normcase(os.path.splitext(my_path)[0])
          vsr_dir = os.path.normcase(os.path.splitext(versioneer_py)[0])
          if me_dir != vsr_dir:
              print("Warning: build in %s is using versioneer.py from %s"
                    % (os.path.dirname(my_path), versioneer_py))
      except NameError:
          pass
      return root
  
  
  def get_config_from_root(root):
      """Read the project setup.cfg file to determine Versioneer config."""
      # This might raise OSError (if setup.cfg is missing), or
      # configparser.NoSectionError (if it lacks a [versioneer] section), or
      # configparser.NoOptionError (if it lacks "VCS="). See the docstring at
      # the top of versioneer.py for instructions on writing your setup.cfg .
      setup_cfg = os.path.join(root, "setup.cfg")
      parser = configparser.ConfigParser()
      with open(setup_cfg, "r") as cfg_file:
          parser.read_file(cfg_file)
      VCS = parser.get("versioneer", "VCS")  # mandatory
  
      # Dict-like interface for non-mandatory entries
      section = parser["versioneer"]
  
      cfg = VersioneerConfig()
      cfg.VCS = VCS
      cfg.style = section.get("style", "")
      cfg.versionfile_source = section.get("versionfile_source")
      cfg.versionfile_build = section.get("versionfile_build")
      cfg.tag_prefix = section.get("tag_prefix")
      if cfg.tag_prefix in ("''", '""'):
          cfg.tag_prefix = ""
      cfg.parentdir_prefix = section.get("parentdir_prefix")
      cfg.verbose = section.get("verbose")
      return cfg
  
  
  class NotThisMethod(Exception):
      """Exception raised if a method is not valid for the current scenario."""
  
  
  # these dictionaries contain VCS-specific tools
  LONG_VERSION_PY: Dict[str, str] = {}
  HANDLERS: Dict[str, Dict[str, Callable]] = {}
  
  
  def register_vcs_handler(vcs, method):  # decorator
      """Create decorator to mark a method as the handler of a VCS."""
      def decorate(f):
          """Store f in HANDLERS[vcs][method]."""
          HANDLERS.setdefault(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)
      process = None
  
      popen_kwargs = {}
      if sys.platform == "win32":
          # This hides the console window if pythonw.exe is used
          startupinfo = subprocess.STARTUPINFO()
          startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
          popen_kwargs["startupinfo"] = startupinfo
  
      for command in commands:
          try:
              dispcmd = str([command] + args)
              # remember shell=False, so use git.cmd on windows, not just git
              process = subprocess.Popen([command] + args, cwd=cwd, env=env,
                                         stdout=subprocess.PIPE,
                                         stderr=(subprocess.PIPE if hide_stderr
                                                 else None), **popen_kwargs)
              break
          except OSError:
              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 = process.communicate()[0].strip().decode()
      if process.returncode != 0:
          if verbose:
              print("unable to run %s (error)" % dispcmd)
              print("stdout was %s" % stdout)
          return None, process.returncode
      return stdout, process.returncode
  
  
  LONG_VERSION_PY['git'] = r'''
  # 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-0.22 (https://github.com/python-versioneer/python-versioneer)
  
  """Git implementation of _version.py."""
  
  import errno
  import os
  import re
  import subprocess
  import sys
  from typing import Callable, Dict
  import functools
  
  
  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 = "%(DOLLAR)sFormat:%%d%(DOLLAR)s"
      git_full = "%(DOLLAR)sFormat:%%H%(DOLLAR)s"
      git_date = "%(DOLLAR)sFormat:%%ci%(DOLLAR)s"
      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 = "%(STYLE)s"
      cfg.tag_prefix = "%(TAG_PREFIX)s"
      cfg.parentdir_prefix = "%(PARENTDIR_PREFIX)s"
      cfg.versionfile_source = "%(VERSIONFILE_SOURCE)s"
      cfg.verbose = False
      return cfg
  
  
  class NotThisMethod(Exception):
      """Exception raised if a method is not valid for the current scenario."""
  
  
  LONG_VERSION_PY: Dict[str, str] = {}
  HANDLERS: Dict[str, Dict[str, Callable]] = {}
  
  
  def register_vcs_handler(vcs, method):  # decorator
      """Create decorator to mark a method as the handler of a 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)
      process = None
  
      popen_kwargs = {}
      if sys.platform == "win32":
          # This hides the console window if pythonw.exe is used
          startupinfo = subprocess.STARTUPINFO()
          startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
          popen_kwargs["startupinfo"] = startupinfo
  
      for command in commands:
          try:
              dispcmd = str([command] + args)
              # remember shell=False, so use git.cmd on windows, not just git
              process = subprocess.Popen([command] + args, cwd=cwd, env=env,
                                         stdout=subprocess.PIPE,
                                         stderr=(subprocess.PIPE if hide_stderr
                                                 else None), **popen_kwargs)
              break
          except OSError:
              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 = process.communicate()[0].strip().decode()
      if process.returncode != 0:
          if verbose:
              print("unable to run %%s (error)" %% dispcmd)
              print("stdout was %%s" %% stdout)
          return None, process.returncode
      return stdout, process.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 _ in range(3):
          for prefix in [parentdir_prefix, ""]:
              prefix = prefix.replace("-", "_")
              for dirname in [os.path.basename(root)] + os.listdir(root):
                  dirname = dirname.replace("-", "_")
                  if not dirname.startswith(prefix):
                      continue
                  components = dirname[len(prefix):].split(".")
                  components = [
                      comp for comp in components
                      if all(c.isdigit() for c in comp)
                  ]
                  if len(components) <= 1:
                      continue
                  return {"version": ".".join(components),
                          "full-revisionid": None,
                          "dirty": False, "error": None, "date": None}
          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:
          with open(versionfile_abs, "r") as fobj:
              for line in fobj:
                  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)
      except OSError:
          pass
      return keywords
  
  
  @register_vcs_handler("git", "keywords")
  def git_versions_from_keywords(keywords, tag_prefix, verbose):
      """Get version information from git keywords."""
      if "refnames" not in keywords:
          raise NotThisMethod("Short version file found")
      date = keywords.get("date")
      if date is not None:
          # Use only the last line.  Previous lines may contain GPG signature
          # information.
          date = date.splitlines()[-1]
  
          # 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 = {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 = {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 = {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):]
              # Filter out refs that exactly match prefix or that don't start
              # with a number once the prefix is stripped (mostly a concern
              # when prefix is '')
              if not re.match(r'\d', r):
                  continue
              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, runner=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"]
  
      # GIT_DIR can interfere with correct operation of Versioneer.
      # It may be intended to be passed to the Versioneer-versioned project,
      # but that should not change where we get our version from.
      env = os.environ.copy()
      env.pop("GIT_DIR", None)
      runner = functools.partial(runner, env=env)
  
      _, rc = runner(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")
  
      MATCH_ARGS = ["--match", "%%s*" %% tag_prefix] if tag_prefix else []
  
      # 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 = runner(GITS, ["describe", "--tags", "--dirty",
                                       "--always", "--long", *MATCH_ARGS],
                                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 = runner(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
  
      branch_name, rc = runner(GITS, ["rev-parse", "--abbrev-ref", "HEAD"],
                               cwd=root)
      # --abbrev-ref was added in git-1.6.3
      if rc != 0 or branch_name is None:
          raise NotThisMethod("'git rev-parse --abbrev-ref' returned error")
      branch_name = branch_name.strip()
  
      if branch_name == "HEAD":
          # If we aren't exactly on a branch, pick a branch which represents
          # the current commit. If all else fails, we are on a branchless
          # commit.
          branches, rc = runner(GITS, ["branch", "--contains"], cwd=root)
          # --contains was added in git-1.5.4
          if rc != 0 or branches is None:
              raise NotThisMethod("'git branch --contains' returned error")
          branches = branches.split("\n")
  
          # Remove the first line if we're running detached
          if "(" in branches[0]:
              branches.pop(0)
  
          # Strip off the leading "* " from the list of branches.
          branches = [branch[2:] for branch in branches]
          if "master" in branches:
              branch_name = "master"
          elif not branches:
              branch_name = None
          else:
              # Pick the first branch that is returned. Good or bad.
              branch_name = branches[0]
  
      pieces["branch"] = branch_name
  
      # 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:
              # unparsable. 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
  