106 lines
2.7 KiB
Python
106 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
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# Author: Douglas Creager <dcreager@dcreager.net>
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# This file is placed into the public domain.
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# Calculates the current version number. If possible, this is the
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# output of “git describe”, modified to conform to the versioning
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# scheme that setuptools uses. If “git describe” returns an error
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# (most likely because we're in an unpacked copy of a release tarball,
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# rather than in a git working copy), then we fall back on reading the
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# contents of the RELEASE-VERSION file.
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#
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# To use this script, simply import it your setup.py file, and use the
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# results of get_git_version() as your package version:
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#
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# from version import *
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#
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# setup(
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# version=get_git_version(),
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# .
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# .
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# .
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# )
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#
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# This will automatically update the RELEASE-VERSION file, if
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# necessary. Note that the RELEASE-VERSION file should *not* be
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# checked into git; please add it to your top-level .gitignore file.
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#
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# You'll probably want to distribute the RELEASE-VERSION file in your
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# sdist tarballs; to do this, just create a MANIFEST.in file that
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# contains the following line:
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#
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# include RELEASE-VERSION
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__all__ = ("get_git_version")
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from subprocess import Popen, PIPE
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FALLBACK_VERSION = "2012.1dev"
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def call_git_describe(abbrev=4):
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try:
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p = Popen(['git', 'describe', '--abbrev=%d' % abbrev],
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stdout=PIPE, stderr=PIPE)
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p.stderr.close()
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line = p.stdout.readlines()[0]
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return line.strip()
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except:
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return FALLBACK_VERSION
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def read_release_version():
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try:
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f = open("RELEASE-VERSION", "r")
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try:
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version = f.readlines()[0]
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return version.strip()
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finally:
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f.close()
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except:
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return None
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def write_release_version(version):
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f = open("RELEASE-VERSION", "w")
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f.write("%s\n" % version)
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f.close()
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def get_git_version(abbrev=4):
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# Read in the version that's currently in RELEASE-VERSION.
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release_version = read_release_version()
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# First try to get the current version using “git describe”.
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version = call_git_describe(abbrev)
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# If that doesn't work, fall back on the value that's in
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# RELEASE-VERSION.
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if version is None:
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version = release_version
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# If we still don't have anything, that's an error.
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if version is None:
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raise ValueError("Cannot find the version number!")
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# If the current version is different from what's in the
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# RELEASE-VERSION file, update the file to be current.
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if version != release_version:
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write_release_version(version)
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# Finally, return the current version.
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return version
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if __name__ == "__main__":
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print get_git_version()
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