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"""Wrapper around git command-line tools.""" from __future__ import annotations import re import typing as t from .util import ( SubprocessError, raw_command, ) class Git: """Wrapper around git command-line tools.""" def __init__(self, root: t.Optional[str] = None) -> None: self.git = 'git' self.root = root def get_diff(self, args: list[str], git_options: t.Optional[list[str]] = None) -> list[str]: """Run `git diff` and return the result as a list.""" cmd = ['diff'] + args if git_options is None: git_options = ['-c', 'core.quotePath='] return self.run_git_split(git_options + cmd, '\n', str_errors='replace') def get_diff_names(self, args: list[str]) -> list[str]: """Return a list of file names from the `git diff` command.""" cmd = ['diff', '--name-only', '--no-renames', '-z'] + args return self.run_git_split(cmd, '\0') def get_submodule_paths(self) -> list[str]: """Return a list of submodule paths recursively.""" cmd = ['submodule', 'status', '--recursive'] output = self.run_git_split(cmd, '\n') submodule_paths = [re.search(r'^.[0-9a-f]+ (?P<path>[^ ]+)', line).group('path') for line in output] # status is returned for all submodules in the current git repository relative to the current directory # when the current directory is not the root of the git repository this can yield relative paths which are not below the current directory # this can occur when multiple collections are in a git repo and some collections are submodules when others are not # specifying "." as the path to enumerate would limit results to the current directory, but can cause the git command to fail with the error: # error: pathspec '.' did not match any file(s) known to git # this can occur when the current directory contains no files tracked by git # instead we'll filter out the relative paths, since we're only interested in those at or below the current directory submodule_paths = [path for path in submodule_paths if not path.startswith('../')] return submodule_paths def get_file_names(self, args: list[str]) -> list[str]: """Return a list of file names from the `git ls-files` command.""" cmd = ['ls-files', '-z'] + args return self.run_git_split(cmd, '\0') def get_branches(self) -> list[str]: """Return the list of branches.""" cmd = ['for-each-ref', 'refs/heads/', '--format', '%(refname:strip=2)'] return self.run_git_split(cmd) def get_branch(self) -> str: """Return the current branch name.""" cmd = ['symbolic-ref', '--short', 'HEAD'] return self.run_git(cmd).strip() def get_rev_list(self, commits: t.Optional[list[str]] = None, max_count: t.Optional[int] = None) -> list[str]: """Return the list of results from the `git rev-list` command.""" cmd = ['rev-list'] if commits: cmd += commits else: cmd += ['HEAD'] if max_count: cmd += ['--max-count', '%s' % max_count] return self.run_git_split(cmd) def get_branch_fork_point(self, branch: str) -> str: """Return a reference to the point at which the given branch was forked.""" cmd = ['merge-base', branch, 'HEAD'] return self.run_git(cmd).strip() def is_valid_ref(self, ref: str) -> bool: """Return True if the given reference is valid, otherwise return False.""" cmd = ['show', ref] try: self.run_git(cmd, str_errors='replace') return True except SubprocessError: return False def run_git_split(self, cmd: list[str], separator: t.Optional[str] = None, str_errors: str = 'strict') -> list[str]: """Run the given `git` command and return the results as a list.""" output = self.run_git(cmd, str_errors=str_errors).strip(separator) if not output: return [] return output.split(separator) def run_git(self, cmd: list[str], str_errors: str = 'strict') -> str: """Run the given `git` command and return the results as a string.""" return raw_command([self.git] + cmd, cwd=self.root, capture=True, str_errors=str_errors)[0]