hy/get_version.py

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import os, subprocess, runpy
# Try to get and update the version.
os.chdir(os.path.split(os.path.abspath(__file__))[0])
VERSIONFILE = os.path.join("hy", "version.py")
try:
__version__ = (subprocess.check_output
(["git", "describe", "--tags", "--dirty"])
.decode('ASCII').strip()
.replace('-', '+', 1).replace('-', '.'))
with open(VERSIONFILE, "wt") as o:
o.write("__version__ = {!r}\n".format(__version__))
except (subprocess.CalledProcessError, OSError):
if os.path.exists(VERSIONFILE):
__version__ = runpy.run_path(VERSIONFILE)['__version__']
else:
__version__ = "unknown"