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from __future__ import absolute_import
import os.path
from raven.utils.compat import text_type
from .exceptions import InvalidGitRepository
__all__ = ('fetch_git_sha', 'fetch_package_version')
def fetch_git_sha(path, head=None):
"""
>>> fetch_git_sha(os.path.dirname(__file__))
"""
if not head:
head_path = os.path.join(path, '.git', 'HEAD')
if not os.path.exists(head_path):
raise InvalidGitRepository(
'Cannot identify HEAD for git repository at %s' % (path,))
with open(head_path, 'r') as fp:
head = text_type(fp.read()).strip()
if head.startswith('ref: '):
head = head[5:]
revision_file = os.path.join(
path, '.git', *head.split('/')
)
else:
return head
else:
revision_file = os.path.join(path, '.git', 'refs', 'heads', head)
if not os.path.exists(revision_file):
if not os.path.exists(os.path.join(path, '.git')):
raise InvalidGitRepository(
'%s does not seem to be the root of a git repository' % (path,))
# Check for our .git/packed-refs' file since a `git gc` may have run
# https://git-scm.com/book/en/v2/Git-Internals-Maintenance-and-Data-Recovery
packed_file = os.path.join(path, '.git', 'packed-refs')
if os.path.exists(packed_file):
with open(packed_file) as fh:
for line in fh:
line = line.rstrip()
if line and line[:1] not in ('#', '^'):
try:
revision, ref = line.split(' ', 1)
except ValueError:
continue
if ref == head:
return text_type(revision)
raise InvalidGitRepository(
'Unable to find ref to head "%s" in repository' % (head,))
with open(revision_file) as fh:
return text_type(fh.read()).strip()
def fetch_package_version(dist_name):
"""
>>> fetch_package_version('sentry')
"""
try:
# Importing pkg_resources can be slow, so only import it
# if we need it.
import pkg_resources
except ImportError:
# pkg_resource is not available on Google App Engine
raise NotImplementedError('pkg_resources is not available '
'on this Python install')
dist = pkg_resources.get_distribution(dist_name)
return dist.version