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import tempfile
import re
import os.path
from pip.util import call_subprocess
from pip.util import display_path, rmtree
from pip.vcs import vcs, VersionControl
from pip.log import logger
from pip.backwardcompat import url2pathname, urlparse
urlsplit = urlparse.urlsplit
urlunsplit = urlparse.urlunsplit
class Git(VersionControl):
name = 'git'
dirname = '.git'
repo_name = 'clone'
schemes = (
'git', 'git+http', 'git+https', 'git+ssh', 'git+git', 'git+file',
)
bundle_file = 'git-clone.txt'
guide = ('# This was a Git repo; to make it a repo again run:\n'
'git init\ngit remote add origin %(url)s -f\ngit '
'checkout %(rev)s\n')
def __init__(self, url=None, *args, **kwargs):
# Works around an apparent Git bug
# (see http://article.gmane.org/gmane.comp.version-control.git/146500)
if url:
scheme, netloc, path, query, fragment = urlsplit(url)
if scheme.endswith('file'):
initial_slashes = path[:-len(path.lstrip('/'))]
newpath = (
initial_slashes +
url2pathname(path).replace('\\', '/').lstrip('/')
)
url = urlunsplit((scheme, netloc, newpath, query, fragment))
after_plus = scheme.find('+') + 1
url = scheme[:after_plus] + urlunsplit(
(scheme[after_plus:], netloc, newpath, query, fragment),
)
super(Git, self).__init__(url, *args, **kwargs)
def parse_vcs_bundle_file(self, content):
url = rev = None
for line in content.splitlines():
if not line.strip() or line.strip().startswith('#'):
continue
url_match = re.search(
r'git\s*remote\s*add\s*origin(.*)\s*-f',
line,
)
if url_match:
url = url_match.group(1).strip()
rev_match = re.search(r'^git\s*checkout\s*-q\s*(.*)\s*', line)
if rev_match:
rev = rev_match.group(1).strip()
if url and rev:
return url, rev
return None, None
def export(self, location):
"""Export the Git repository at the url to the destination location"""
temp_dir = tempfile.mkdtemp('-export', 'pip-')
self.unpack(temp_dir)
try:
if not location.endswith('/'):
location = location + '/'
call_subprocess(
[self.cmd, 'checkout-index', '-a', '-f', '--prefix', location],
filter_stdout=self._filter, show_stdout=False, cwd=temp_dir)
finally:
rmtree(temp_dir)
def check_rev_options(self, rev, dest, rev_options):
"""Check the revision options before checkout to compensate that tags
and branches may need origin/ as a prefix.
Returns the SHA1 of the branch or tag if found.
"""
revisions = self.get_refs(dest)
origin_rev = 'origin/%s' % rev
if origin_rev in revisions:
# remote branch
return [revisions[origin_rev]]
elif rev in revisions:
# a local tag or branch name
return [revisions[rev]]
else:
logger.warn(
"Could not find a tag or branch '%s', assuming commit." % rev,
)
return rev_options
def switch(self, dest, url, rev_options):
call_subprocess(
[self.cmd, 'config', 'remote.origin.url', url], cwd=dest)
call_subprocess(
[self.cmd, 'checkout', '-q'] + rev_options, cwd=dest)
self.update_submodules(dest)
def update(self, dest, rev_options):
# First fetch changes from the default remote
call_subprocess([self.cmd, 'fetch', '-q'], cwd=dest)
# Then reset to wanted revision (maby even origin/master)
if rev_options:
rev_options = self.check_rev_options(
rev_options[0], dest, rev_options,
)
call_subprocess(
[self.cmd, 'reset', '--hard', '-q'] + rev_options,
cwd=dest,
)
#: update submodules
self.update_submodules(dest)
def obtain(self, dest):
url, rev = self.get_url_rev()
if rev:
rev_options = [rev]
rev_display = ' (to %s)' % rev
else:
rev_options = ['origin/master']
rev_display = ''
if self.check_destination(dest, url, rev_options, rev_display):
logger.notify(
'Cloning %s%s to %s' % (url, rev_display, display_path(dest)),
)
call_subprocess([self.cmd, 'clone', '-q', url, dest])
#: repo may contain submodules
self.update_submodules(dest)
if rev:
rev_options = self.check_rev_options(rev, dest, rev_options)
# Only do a checkout if rev_options differs from HEAD
if not self.get_revision(dest).startswith(rev_options[0]):
call_subprocess(
[self.cmd, 'checkout', '-q'] + rev_options,
cwd=dest,
)
def get_url(self, location):
url = call_subprocess(
[self.cmd, 'config', 'remote.origin.url'],
show_stdout=False, cwd=location)
return url.strip()
def get_revision(self, location):
current_rev = call_subprocess(
[self.cmd, 'rev-parse', 'HEAD'], show_stdout=False, cwd=location)
return current_rev.strip()
def get_refs(self, location):
"""Return map of named refs (branches or tags) to commit hashes."""
output = call_subprocess([self.cmd, 'show-ref'],
show_stdout=False, cwd=location)
rv = {}
for line in output.strip().splitlines():
commit, ref = line.split(' ', 1)
ref = ref.strip()
ref_name = None
if ref.startswith('refs/remotes/'):
ref_name = ref[len('refs/remotes/'):]
elif ref.startswith('refs/heads/'):
ref_name = ref[len('refs/heads/'):]
elif ref.startswith('refs/tags/'):
ref_name = ref[len('refs/tags/'):]
if ref_name is not None:
rv[ref_name] = commit.strip()
return rv
def get_src_requirement(self, dist, location, find_tags):
repo = self.get_url(location)
if not repo.lower().startswith('git:'):
repo = 'git+' + repo
egg_project_name = dist.egg_name().split('-', 1)[0]
if not repo:
return None
current_rev = self.get_revision(location)
refs = self.get_refs(location)
# refs maps names to commit hashes; we need the inverse
# if multiple names map to a single commit, this arbitrarily picks one
names_by_commit = dict((commit, ref) for ref, commit in refs.items())
if current_rev in names_by_commit:
# It's a tag
full_egg_name = (
'%s-%s' % (egg_project_name, names_by_commit[current_rev])
)
else:
full_egg_name = '%s-dev' % egg_project_name
return '%s@%s#egg=%s' % (repo, current_rev, full_egg_name)
def get_url_rev(self):
"""
Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
That's required because although they use SSH they sometimes doesn't
work with a ssh:// scheme (e.g. Github). But we need a scheme for
parsing. Hence we remove it again afterwards and return it as a stub.
"""
if '://' not in self.url:
assert 'file:' not in self.url
self.url = self.url.replace('git+', 'git+ssh://')
url, rev = super(Git, self).get_url_rev()
url = url.replace('ssh://', '')
else:
url, rev = super(Git, self).get_url_rev()
return url, rev
def update_submodules(self, location):
if not os.path.exists(os.path.join(location, '.gitmodules')):
return
call_subprocess(
[self.cmd, 'submodule', 'update', '--init', '--recursive', '-q'],
cwd=location,
)
vcs.register(Git)
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