mirror of https://github.com/pypa/pip
312 lines
11 KiB
Python
312 lines
11 KiB
Python
from __future__ import absolute_import
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import logging
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import os.path
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import re
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from pip._vendor.packaging.version import parse as parse_version
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from pip._vendor.six.moves.urllib import parse as urllib_parse
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from pip._vendor.six.moves.urllib import request as urllib_request
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from pip._internal.compat import samefile
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from pip._internal.exceptions import BadCommand
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from pip._internal.utils.misc import display_path
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from pip._internal.utils.temp_dir import TempDirectory
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from pip._internal.vcs import VersionControl, vcs
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urlsplit = urllib_parse.urlsplit
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urlunsplit = urllib_parse.urlunsplit
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logger = logging.getLogger(__name__)
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HASH_REGEX = re.compile('[a-fA-F0-9]{40}')
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def looks_like_hash(sha):
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return bool(HASH_REGEX.match(sha))
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class Git(VersionControl):
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name = 'git'
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dirname = '.git'
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repo_name = 'clone'
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schemes = (
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'git', 'git+http', 'git+https', 'git+ssh', 'git+git', 'git+file',
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)
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# Prevent the user's environment variables from interfering with pip:
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# https://github.com/pypa/pip/issues/1130
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unset_environ = ('GIT_DIR', 'GIT_WORK_TREE')
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default_arg_rev = 'HEAD'
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def __init__(self, url=None, *args, **kwargs):
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# Works around an apparent Git bug
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# (see https://article.gmane.org/gmane.comp.version-control.git/146500)
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if url:
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scheme, netloc, path, query, fragment = urlsplit(url)
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if scheme.endswith('file'):
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initial_slashes = path[:-len(path.lstrip('/'))]
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newpath = (
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initial_slashes +
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urllib_request.url2pathname(path)
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.replace('\\', '/').lstrip('/')
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)
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url = urlunsplit((scheme, netloc, newpath, query, fragment))
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after_plus = scheme.find('+') + 1
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url = scheme[:after_plus] + urlunsplit(
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(scheme[after_plus:], netloc, newpath, query, fragment),
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)
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super(Git, self).__init__(url, *args, **kwargs)
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def get_base_rev_args(self, rev):
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return [rev]
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def get_git_version(self):
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VERSION_PFX = 'git version '
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version = self.run_command(['version'], show_stdout=False)
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if version.startswith(VERSION_PFX):
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version = version[len(VERSION_PFX):].split()[0]
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else:
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version = ''
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# get first 3 positions of the git version becasue
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# on windows it is x.y.z.windows.t, and this parses as
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# LegacyVersion which always smaller than a Version.
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version = '.'.join(version.split('.')[:3])
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return parse_version(version)
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def export(self, location):
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"""Export the Git repository at the url to the destination location"""
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if not location.endswith('/'):
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location = location + '/'
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with TempDirectory(kind="export") as temp_dir:
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self.unpack(temp_dir.path)
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self.run_command(
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['checkout-index', '-a', '-f', '--prefix', location],
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show_stdout=False, cwd=temp_dir.path
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)
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def get_revision_sha(self, dest, rev):
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"""
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Return a commit hash for the given revision if it names a remote
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branch or tag. Otherwise, return None.
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Args:
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dest: the repository directory.
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rev: the revision name.
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"""
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# Pass rev to pre-filter the list.
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output = self.run_command(['show-ref', rev], cwd=dest,
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show_stdout=False, on_returncode='ignore')
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refs = {}
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for line in output.strip().splitlines():
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try:
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sha, ref = line.split()
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except ValueError:
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# Include the offending line to simplify troubleshooting if
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# this error ever occurs.
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raise ValueError('unexpected show-ref line: {!r}'.format(line))
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refs[ref] = sha
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branch_ref = 'refs/remotes/origin/{}'.format(rev)
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tag_ref = 'refs/tags/{}'.format(rev)
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return refs.get(branch_ref) or refs.get(tag_ref)
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def check_rev_options(self, dest, rev_options):
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"""Check the revision options before checkout.
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Returns a new RevOptions object for the SHA1 of the branch or tag
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if found.
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Args:
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rev_options: a RevOptions object.
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"""
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rev = rev_options.arg_rev
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sha = self.get_revision_sha(dest, rev)
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if sha is not None:
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return rev_options.make_new(sha)
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# Do not show a warning for the common case of something that has
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# the form of a Git commit hash.
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if not looks_like_hash(rev):
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logger.warning(
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"Did not find branch or tag '%s', assuming revision or ref.",
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rev,
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)
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return rev_options
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def is_commit_id_equal(self, dest, name):
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"""
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Return whether the current commit hash equals the given name.
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Args:
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dest: the repository directory.
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name: a string name.
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"""
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if not name:
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# Then avoid an unnecessary subprocess call.
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return False
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return self.get_revision(dest) == name
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def switch(self, dest, url, rev_options):
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self.run_command(['config', 'remote.origin.url', url], cwd=dest)
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cmd_args = ['checkout', '-q'] + rev_options.to_args()
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self.run_command(cmd_args, cwd=dest)
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self.update_submodules(dest)
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def update(self, dest, rev_options):
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# First fetch changes from the default remote
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if self.get_git_version() >= parse_version('1.9.0'):
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# fetch tags in addition to everything else
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self.run_command(['fetch', '-q', '--tags'], cwd=dest)
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else:
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self.run_command(['fetch', '-q'], cwd=dest)
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# Then reset to wanted revision (maybe even origin/master)
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rev_options = self.check_rev_options(dest, rev_options)
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cmd_args = ['reset', '--hard', '-q'] + rev_options.to_args()
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self.run_command(cmd_args, cwd=dest)
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#: update submodules
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self.update_submodules(dest)
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def obtain(self, dest):
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url, rev = self.get_url_rev()
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rev_options = self.make_rev_options(rev)
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if self.check_destination(dest, url, rev_options):
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rev_display = rev_options.to_display()
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logger.info(
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'Cloning %s%s to %s', url, rev_display, display_path(dest),
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)
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self.run_command(['clone', '-q', url, dest])
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if rev:
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rev_options = self.check_rev_options(dest, rev_options)
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# Only do a checkout if the current commit id doesn't match
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# the requested revision.
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if not self.is_commit_id_equal(dest, rev_options.rev):
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rev = rev_options.rev
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# Only fetch the revision if it's a ref
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if rev.startswith('refs/'):
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self.run_command(
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['fetch', '-q', url] + rev_options.to_args(),
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cwd=dest,
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)
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# Change the revision to the SHA of the ref we fetched
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rev = 'FETCH_HEAD'
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self.run_command(['checkout', '-q', rev], cwd=dest)
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#: repo may contain submodules
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self.update_submodules(dest)
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def get_url(self, location):
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"""Return URL of the first remote encountered."""
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remotes = self.run_command(
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['config', '--get-regexp', r'remote\..*\.url'],
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show_stdout=False, cwd=location,
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)
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remotes = remotes.splitlines()
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found_remote = remotes[0]
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for remote in remotes:
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if remote.startswith('remote.origin.url '):
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found_remote = remote
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break
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url = found_remote.split(' ')[1]
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return url.strip()
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def get_revision(self, location):
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current_rev = self.run_command(
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['rev-parse', 'HEAD'], show_stdout=False, cwd=location,
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)
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return current_rev.strip()
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def _get_subdirectory(self, location):
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"""Return the relative path of setup.py to the git repo root."""
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# find the repo root
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git_dir = self.run_command(['rev-parse', '--git-dir'],
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show_stdout=False, cwd=location).strip()
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if not os.path.isabs(git_dir):
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git_dir = os.path.join(location, git_dir)
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root_dir = os.path.join(git_dir, '..')
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# find setup.py
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orig_location = location
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while not os.path.exists(os.path.join(location, 'setup.py')):
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last_location = location
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location = os.path.dirname(location)
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if location == last_location:
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# We've traversed up to the root of the filesystem without
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# finding setup.py
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logger.warning(
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"Could not find setup.py for directory %s (tried all "
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"parent directories)",
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orig_location,
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)
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return None
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# relative path of setup.py to repo root
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if samefile(root_dir, location):
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return None
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return os.path.relpath(location, root_dir)
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def get_src_requirement(self, dist, location):
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repo = self.get_url(location)
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if not repo.lower().startswith('git:'):
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repo = 'git+' + repo
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egg_project_name = dist.egg_name().split('-', 1)[0]
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if not repo:
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return None
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current_rev = self.get_revision(location)
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req = '%s@%s#egg=%s' % (repo, current_rev, egg_project_name)
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subdirectory = self._get_subdirectory(location)
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if subdirectory:
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req += '&subdirectory=' + subdirectory
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return req
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def get_url_rev(self):
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"""
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Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
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That's required because although they use SSH they sometimes don't
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work with a ssh:// scheme (e.g. GitHub). But we need a scheme for
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parsing. Hence we remove it again afterwards and return it as a stub.
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"""
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if '://' not in self.url:
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assert 'file:' not in self.url
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self.url = self.url.replace('git+', 'git+ssh://')
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url, rev = super(Git, self).get_url_rev()
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url = url.replace('ssh://', '')
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else:
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url, rev = super(Git, self).get_url_rev()
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return url, rev
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def update_submodules(self, location):
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if not os.path.exists(os.path.join(location, '.gitmodules')):
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return
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self.run_command(
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['submodule', 'update', '--init', '--recursive', '-q'],
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cwd=location,
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)
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@classmethod
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def controls_location(cls, location):
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if super(Git, cls).controls_location(location):
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return True
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try:
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r = cls().run_command(['rev-parse'],
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cwd=location,
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show_stdout=False,
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on_returncode='ignore')
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return not r
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except BadCommand:
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logger.debug("could not determine if %s is under git control "
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"because git is not available", location)
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return False
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vcs.register(Git)
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