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# The following comment should be removed at some point in the future.
# mypy: disallow-untyped-defs=False
from __future__ import absolute_import
import logging
import os.path
import re
from pip._vendor.packaging.version import parse as parse_version
from pip._vendor.six.moves.urllib import parse as urllib_parse
from pip._vendor.six.moves.urllib import request as urllib_request
from pip._internal.exceptions import BadCommand
from pip._internal.utils.misc import display_path
from pip._internal.utils.subprocess import make_command
from pip._internal.utils.temp_dir import TempDirectory
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
from pip._internal.vcs.versioncontrol import (
RemoteNotFoundError,
VersionControl,
find_path_to_setup_from_repo_root,
vcs,
)
if MYPY_CHECK_RUNNING:
from typing import Optional, Tuple
from pip._internal.utils.misc import HiddenText
from pip._internal.vcs.versioncontrol import AuthInfo, RevOptions
urlsplit = urllib_parse.urlsplit
urlunsplit = urllib_parse.urlunsplit
logger = logging.getLogger(__name__)
HASH_REGEX = re.compile('^[a-fA-F0-9]{40}$')
def looks_like_hash(sha):
return bool(HASH_REGEX.match(sha))
class Git(VersionControl):
name = 'git'
dirname = '.git'
repo_name = 'clone'
schemes = (
'git', 'git+http', 'git+https', 'git+ssh', 'git+git', 'git+file',
)
# Prevent the user's environment variables from interfering with pip:
# https://github.com/pypa/pip/issues/1130
unset_environ = ('GIT_DIR', 'GIT_WORK_TREE')
default_arg_rev = 'HEAD'
@staticmethod
def get_base_rev_args(rev):
return [rev]
def get_git_version(self):
VERSION_PFX = 'git version '
version = self.run_command(['version'], show_stdout=False)
if version.startswith(VERSION_PFX):
version = version[len(VERSION_PFX):].split()[0]
else:
version = ''
# get first 3 positions of the git version because
# on windows it is x.y.z.windows.t, and this parses as
# LegacyVersion which always smaller than a Version.
version = '.'.join(version.split('.')[:3])
return parse_version(version)
@classmethod
def get_current_branch(cls, location):
"""
Return the current branch, or None if HEAD isn't at a branch
(e.g. detached HEAD).
"""
# git-symbolic-ref exits with empty stdout if "HEAD" is a detached
# HEAD rather than a symbolic ref. In addition, the -q causes the
# command to exit with status code 1 instead of 128 in this case
# and to suppress the message to stderr.
args = ['symbolic-ref', '-q', 'HEAD']
output = cls.run_command(
args, extra_ok_returncodes=(1, ), show_stdout=False, cwd=location,
)
ref = output.strip()
if ref.startswith('refs/heads/'):
return ref[len('refs/heads/'):]
return None
def export(self, location, url):
# type: (str, HiddenText) -> None
"""Export the Git repository at the url to the destination location"""
if not location.endswith('/'):
location = location + '/'
with TempDirectory(kind="export") as temp_dir:
self.unpack(temp_dir.path, url=url)
self.run_command(
['checkout-index', '-a', '-f', '--prefix', location],
show_stdout=False, cwd=temp_dir.path
)
@classmethod
def get_revision_sha(cls, dest, rev):
"""
Return (sha_or_none, is_branch), where sha_or_none is a commit hash
if the revision names a remote branch or tag, otherwise None.
Args:
dest: the repository directory.
rev: the revision name.
"""
# Pass rev to pre-filter the list.
output = cls.run_command(['show-ref', rev], cwd=dest,
show_stdout=False, on_returncode='ignore')
refs = {}
# NOTE: We do not use splitlines here since that would split on other
# unicode separators, which can be maliciously used to install a
# different revision.
for line in output.strip().split("\n"):
line = line.rstrip("\r")
if not line:
continue
try:
sha, ref = line.split(" ", maxsplit=2)
except ValueError:
# Include the offending line to simplify troubleshooting if
# this error ever occurs.
raise ValueError('unexpected show-ref line: {!r}'.format(line))
refs[ref] = sha
branch_ref = 'refs/remotes/origin/{}'.format(rev)
tag_ref = 'refs/tags/{}'.format(rev)
sha = refs.get(branch_ref)
if sha is not None:
return (sha, True)
sha = refs.get(tag_ref)
return (sha, False)
@classmethod
def resolve_revision(cls, dest, url, rev_options):
# type: (str, HiddenText, RevOptions) -> RevOptions
"""
Resolve a revision to a new RevOptions object with the SHA1 of the
branch, tag, or ref if found.
Args:
rev_options: a RevOptions object.
"""
rev = rev_options.arg_rev
# The arg_rev property's implementation for Git ensures that the
# rev return value is always non-None.
assert rev is not None
sha, is_branch = cls.get_revision_sha(dest, rev)
if sha is not None:
rev_options = rev_options.make_new(sha)
rev_options.branch_name = rev if is_branch else None
return rev_options
# Do not show a warning for the common case of something that has
# the form of a Git commit hash.
if not looks_like_hash(rev):
logger.warning(
"Did not find branch or tag '%s', assuming revision or ref.",
rev,
)
if not rev.startswith('refs/'):
return rev_options
# If it looks like a ref, we have to fetch it explicitly.
cls.run_command(
make_command('fetch', '-q', url, rev_options.to_args()),
cwd=dest,
)
# Change the revision to the SHA of the ref we fetched
sha = cls.get_revision(dest, rev='FETCH_HEAD')
rev_options = rev_options.make_new(sha)
return rev_options
@classmethod
def is_commit_id_equal(cls, dest, name):
"""
Return whether the current commit hash equals the given name.
Args:
dest: the repository directory.
name: a string name.
"""
if not name:
# Then avoid an unnecessary subprocess call.
return False
return cls.get_revision(dest) == name
def fetch_new(self, dest, url, rev_options):
# type: (str, HiddenText, RevOptions) -> None
rev_display = rev_options.to_display()
logger.info('Cloning %s%s to %s', url, rev_display, display_path(dest))
self.run_command(make_command('clone', '-q', url, dest))
if rev_options.rev:
# Then a specific revision was requested.
rev_options = self.resolve_revision(dest, url, rev_options)
branch_name = getattr(rev_options, 'branch_name', None)
if branch_name is None:
# Only do a checkout if the current commit id doesn't match
# the requested revision.
if not self.is_commit_id_equal(dest, rev_options.rev):
cmd_args = make_command(
'checkout', '-q', rev_options.to_args(),
)
self.run_command(cmd_args, cwd=dest)
elif self.get_current_branch(dest) != branch_name:
# Then a specific branch was requested, and that branch
# is not yet checked out.
track_branch = 'origin/{}'.format(branch_name)
cmd_args = [
'checkout', '-b', branch_name, '--track', track_branch,
]
self.run_command(cmd_args, cwd=dest)
#: repo may contain submodules
self.update_submodules(dest)
def switch(self, dest, url, rev_options):
# type: (str, HiddenText, RevOptions) -> None
self.run_command(
make_command('config', 'remote.origin.url', url),
cwd=dest,
)
cmd_args = make_command('checkout', '-q', rev_options.to_args())
self.run_command(cmd_args, cwd=dest)
self.update_submodules(dest)
def update(self, dest, url, rev_options):
# type: (str, HiddenText, RevOptions) -> None
# First fetch changes from the default remote
if self.get_git_version() >= parse_version('1.9.0'):
# fetch tags in addition to everything else
self.run_command(['fetch', '-q', '--tags'], cwd=dest)
else:
self.run_command(['fetch', '-q'], cwd=dest)
# Then reset to wanted revision (maybe even origin/master)
rev_options = self.resolve_revision(dest, url, rev_options)
cmd_args = make_command('reset', '--hard', '-q', rev_options.to_args())
self.run_command(cmd_args, cwd=dest)
#: update submodules
self.update_submodules(dest)
@classmethod
def get_remote_url(cls, location):
"""
Return URL of the first remote encountered.
Raises RemoteNotFoundError if the repository does not have a remote
url configured.
"""
# We need to pass 1 for extra_ok_returncodes since the command
# exits with return code 1 if there are no matching lines.
stdout = cls.run_command(
['config', '--get-regexp', r'remote\..*\.url'],
extra_ok_returncodes=(1, ), show_stdout=False, cwd=location,
)
remotes = stdout.splitlines()
try:
found_remote = remotes[0]
except IndexError:
raise RemoteNotFoundError
for remote in remotes:
if remote.startswith('remote.origin.url '):
found_remote = remote
break
url = found_remote.split(' ')[1]
return url.strip()
@classmethod
def get_revision(cls, location, rev=None):
if rev is None:
rev = 'HEAD'
current_rev = cls.run_command(
['rev-parse', rev], show_stdout=False, cwd=location,
)
return current_rev.strip()
@classmethod
def get_subdirectory(cls, location):
"""
Return the path to setup.py, relative to the repo root.
Return None if setup.py is in the repo root.
"""
# find the repo root
git_dir = cls.run_command(
['rev-parse', '--git-dir'],
show_stdout=False, cwd=location).strip()
if not os.path.isabs(git_dir):
git_dir = os.path.join(location, git_dir)
repo_root = os.path.abspath(os.path.join(git_dir, '..'))
return find_path_to_setup_from_repo_root(location, repo_root)
@classmethod
def get_url_rev_and_auth(cls, url):
# type: (str) -> Tuple[str, Optional[str], AuthInfo]
"""
Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
That's required because although they use SSH they sometimes don'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.
"""
# Works around an apparent Git bug
# (see https://article.gmane.org/gmane.comp.version-control.git/146500)
scheme, netloc, path, query, fragment = urlsplit(url)
if scheme.endswith('file'):
initial_slashes = path[:-len(path.lstrip('/'))]
newpath = (
initial_slashes +
urllib_request.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),
)
if '://' not in url:
assert 'file:' not in url
url = url.replace('git+', 'git+ssh://')
url, rev, user_pass = super(Git, cls).get_url_rev_and_auth(url)
url = url.replace('ssh://', '')
else:
url, rev, user_pass = super(Git, cls).get_url_rev_and_auth(url)
return url, rev, user_pass
@classmethod
def update_submodules(cls, location):
if not os.path.exists(os.path.join(location, '.gitmodules')):
return
cls.run_command(
['submodule', 'update', '--init', '--recursive', '-q'],
cwd=location,
)
@classmethod
def controls_location(cls, location):
if super(Git, cls).controls_location(location):
return True
try:
r = cls.run_command(['rev-parse'],
cwd=location,
show_stdout=False,
on_returncode='ignore',
log_failed_cmd=False)
return not r
except BadCommand:
logger.debug("could not determine if %s is under git control "
"because git is not available", location)
return False
vcs.register(Git)