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# Copyright (c) OpenMMLab. All rights reserved.
import os
import subprocess
import warnings
from packaging.version import parse
def digit_version(version_str: str, length: int = 4):
"""Convert a version string into a tuple of integers.
This method is usually used for comparing two versions. For pre-release
versions: alpha < beta < rc.
Args:
version_str (str): The version string.
length (int): The maximum number of version levels. Default: 4.
Returns:
tuple[int]: The version info in digits (integers).
"""
assert 'parrots' not in version_str
version = parse(version_str)
assert version.release, f'failed to parse version {version_str}'
release = list(version.release)
release = release[:length]
if len(release) < length:
release = release + [0] * (length - len(release))
if version.is_prerelease:
mapping = {'a': -3, 'b': -2, 'rc': -1}
val = -4
# version.pre can be None
if version.pre:
if version.pre[0] not in mapping:
warnings.warn(f'unknown prerelease version {version.pre[0]}, '
'version checking may go wrong')
else:
val = mapping[version.pre[0]]
release.extend([val, version.pre[-1]])
else:
release.extend([val, 0])
elif version.is_postrelease:
release.extend([1, version.post])
else:
release.extend([0, 0])
return tuple(release)
def _minimal_ext_cmd(cmd):
# construct minimal environment
env = {}
for k in ['SYSTEMROOT', 'PATH', 'HOME']:
v = os.environ.get(k)
if v is not None:
env[k] = v
# LANGUAGE is used on win32
env['LANGUAGE'] = 'C'
env['LANG'] = 'C'
env['LC_ALL'] = 'C'
out = subprocess.Popen(
cmd, stdout=subprocess.PIPE, env=env).communicate()[0]
return out
def get_git_hash(fallback='unknown', digits=None):
"""Get the git hash of the current repo.
Args:
fallback (str, optional): The fallback string when git hash is
unavailable. Defaults to 'unknown'.
digits (int, optional): kept digits of the hash. Defaults to None,
meaning all digits are kept.
Returns:
str: Git commit hash.
"""
if digits is not None and not isinstance(digits, int):
raise TypeError('digits must be None or an integer')
try:
out = _minimal_ext_cmd(['git', 'rev-parse', 'HEAD'])
sha = out.strip().decode('ascii')
if digits is not None:
sha = sha[:digits]
except OSError:
sha = fallback
return sha
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