You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

527 lines
18 KiB
Python

import logging
import os.path
import pathlib
import re
import urllib.parse
import urllib.request
from typing import List, Optional, Tuple
from pip._internal.exceptions import BadCommand, InstallationError
from pip._internal.utils.misc import HiddenText, display_path, hide_url
from pip._internal.utils.subprocess import make_command
from pip._internal.vcs.versioncontrol import (
AuthInfo,
RemoteNotFoundError,
RemoteNotValidError,
RevOptions,
VersionControl,
find_path_to_project_root_from_repo_root,
vcs,
)
urlsplit = urllib.parse.urlsplit
urlunsplit = urllib.parse.urlunsplit
logger = logging.getLogger(__name__)
GIT_VERSION_REGEX = re.compile(
r"^git version " # Prefix.
r"(\d+)" # Major.
r"\.(\d+)" # Dot, minor.
r"(?:\.(\d+))?" # Optional dot, patch.
r".*$" # Suffix, including any pre- and post-release segments we don't care about.
)
HASH_REGEX = re.compile("^[a-fA-F0-9]{40}$")
# SCP (Secure copy protocol) shorthand. e.g. 'git@example.com:foo/bar.git'
SCP_REGEX = re.compile(
r"""^
# Optional user, e.g. 'git@'
(\w+@)?
# Server, e.g. 'github.com'.
([^/:]+):
# The server-side path. e.g. 'user/project.git'. Must start with an
# alphanumeric character so as not to be confusable with a Windows paths
# like 'C:/foo/bar' or 'C:\foo\bar'.
(\w[^:]*)
$""",
re.VERBOSE,
)
def looks_like_hash(sha: str) -> bool:
return bool(HASH_REGEX.match(sha))
class Git(VersionControl):
name = "git"
dirname = ".git"
repo_name = "clone"
schemes = (
"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: str) -> List[str]:
return [rev]
def is_immutable_rev_checkout(self, url: str, dest: str) -> bool:
_, rev_options = self.get_url_rev_options(hide_url(url))
if not rev_options.rev:
return False
if not self.is_commit_id_equal(dest, rev_options.rev):
# the current commit is different from rev,
# which means rev was something else than a commit hash
return False
# return False in the rare case rev is both a commit hash
# and a tag or a branch; we don't want to cache in that case
# because that branch/tag could point to something else in the future
is_tag_or_branch = bool(self.get_revision_sha(dest, rev_options.rev)[0])
return not is_tag_or_branch
def get_git_version(self) -> Tuple[int, ...]:
version = self.run_command(
["version"],
command_desc="git version",
show_stdout=False,
stdout_only=True,
)
match = GIT_VERSION_REGEX.match(version)
if not match:
logger.warning("Can't parse git version: %s", version)
return ()
return tuple(int(c) for c in match.groups())
@classmethod
def get_current_branch(cls, location: str) -> Optional[str]:
"""
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,
stdout_only=True,
cwd=location,
)
ref = output.strip()
if ref.startswith("refs/heads/"):
return ref[len("refs/heads/") :]
return None
@classmethod
def get_revision_sha(cls, dest: str, rev: str) -> Tuple[Optional[str], bool]:
"""
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,
stdout_only=True,
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:
ref_sha, ref_name = line.split(" ", maxsplit=2)
except ValueError:
# Include the offending line to simplify troubleshooting if
# this error ever occurs.
raise ValueError(f"unexpected show-ref line: {line!r}")
refs[ref_name] = ref_sha
branch_ref = f"refs/remotes/origin/{rev}"
tag_ref = f"refs/tags/{rev}"
sha = refs.get(branch_ref)
if sha is not None:
return (sha, True)
sha = refs.get(tag_ref)
return (sha, False)
@classmethod
def _should_fetch(cls, dest: str, rev: str) -> bool:
"""
Return true if rev is a ref or is a commit that we don't have locally.
Branches and tags are not considered in this method because they are
assumed to be always available locally (which is a normal outcome of
``git clone`` and ``git fetch --tags``).
"""
if rev.startswith("refs/"):
# Always fetch remote refs.
return True
if not looks_like_hash(rev):
# Git fetch would fail with abbreviated commits.
return False
if cls.has_commit(dest, rev):
# Don't fetch if we have the commit locally.
return False
return True
@classmethod
def resolve_revision(
cls, dest: str, url: HiddenText, rev_options: 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 cls._should_fetch(dest, rev):
return rev_options
# fetch the requested revision
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: str, name: Optional[str]) -> bool:
"""
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: str, url: HiddenText, rev_options: RevOptions, verbosity: int
) -> None:
rev_display = rev_options.to_display()
logger.info("Cloning %s%s to %s", url, rev_display, display_path(dest))
if verbosity <= 0:
flags: Tuple[str, ...] = ("--quiet",)
elif verbosity == 1:
flags = ()
else:
flags = ("--verbose", "--progress")
if self.get_git_version() >= (2, 17):
# Git added support for partial clone in 2.17
# https://git-scm.com/docs/partial-clone
# Speeds up cloning by functioning without a complete copy of repository
self.run_command(
make_command(
"clone",
"--filter=blob:none",
*flags,
url,
dest,
)
)
else:
self.run_command(make_command("clone", *flags, 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)
logger.debug("Rev options %s, branch_name %s", rev_options, branch_name)
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 = f"origin/{branch_name}"
cmd_args = [
"checkout",
"-b",
branch_name,
"--track",
track_branch,
]
self.run_command(cmd_args, cwd=dest)
else:
sha = self.get_revision(dest)
rev_options = rev_options.make_new(sha)
logger.info("Resolved %s to commit %s", url, rev_options.rev)
#: repo may contain submodules
self.update_submodules(dest)
def switch(self, dest: str, url: HiddenText, rev_options: 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: str, url: HiddenText, rev_options: RevOptions) -> None:
# First fetch changes from the default remote
if self.get_git_version() >= (1, 9):
# 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: str) -> str:
"""
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,
stdout_only=True,
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 cls._git_remote_to_pip_url(url.strip())
@staticmethod
def _git_remote_to_pip_url(url: str) -> str:
"""
Convert a remote url from what git uses to what pip accepts.
There are 3 legal forms **url** may take:
1. A fully qualified url: ssh://git@example.com/foo/bar.git
2. A local project.git folder: /path/to/bare/repository.git
3. SCP shorthand for form 1: git@example.com:foo/bar.git
Form 1 is output as-is. Form 2 must be converted to URI and form 3 must
be converted to form 1.
See the corresponding test test_git_remote_url_to_pip() for examples of
sample inputs/outputs.
"""
if re.match(r"\w+://", url):
# This is already valid. Pass it though as-is.
return url
if os.path.exists(url):
# A local bare remote (git clone --mirror).
# Needs a file:// prefix.
return pathlib.PurePath(url).as_uri()
scp_match = SCP_REGEX.match(url)
if scp_match:
# Add an ssh:// prefix and replace the ':' with a '/'.
return scp_match.expand(r"ssh://\1\2/\3")
# Otherwise, bail out.
raise RemoteNotValidError(url)
@classmethod
def has_commit(cls, location: str, rev: str) -> bool:
"""
Check if rev is a commit that is available in the local repository.
"""
try:
cls.run_command(
["rev-parse", "-q", "--verify", "sha^" + rev],
cwd=location,
log_failed_cmd=False,
)
except InstallationError:
return False
else:
return True
@classmethod
def get_revision(cls, location: str, rev: Optional[str] = None) -> str:
if rev is None:
rev = "HEAD"
current_rev = cls.run_command(
["rev-parse", rev],
show_stdout=False,
stdout_only=True,
cwd=location,
)
return current_rev.strip()
@classmethod
def get_subdirectory(cls, location: str) -> Optional[str]:
"""
Return the path to Python project root, relative to the repo root.
Return None if the project root is in the repo root.
"""
# find the repo root
git_dir = cls.run_command(
["rev-parse", "--git-dir"],
show_stdout=False,
stdout_only=True,
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_project_root_from_repo_root(location, repo_root)
@classmethod
def get_url_rev_and_auth(cls, url: 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("/")
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().get_url_rev_and_auth(url)
url = url.replace("ssh://", "")
else:
url, rev, user_pass = super().get_url_rev_and_auth(url)
return url, rev, user_pass
@classmethod
def update_submodules(cls, location: str) -> None:
if not os.path.exists(os.path.join(location, ".gitmodules")):
return
cls.run_command(
["submodule", "update", "--init", "--recursive", "-q"],
cwd=location,
)
@classmethod
def get_repository_root(cls, location: str) -> Optional[str]:
loc = super().get_repository_root(location)
if loc:
return loc
try:
r = cls.run_command(
["rev-parse", "--show-toplevel"],
cwd=location,
show_stdout=False,
stdout_only=True,
on_returncode="raise",
log_failed_cmd=False,
)
except BadCommand:
logger.debug(
"could not determine if %s is under git control "
"because git is not available",
location,
)
return None
except InstallationError:
return None
return os.path.normpath(r.rstrip("\r\n"))
@staticmethod
def should_add_vcs_url_prefix(repo_url: str) -> bool:
"""In either https or ssh form, requirements must be prefixed with git+."""
return True
vcs.register(Git)