mirror of
https://github.com/pre-commit/pre-commit.git
synced 2026-01-14 13:00:10 -06:00
129 lines
4.1 KiB
Python
129 lines
4.1 KiB
Python
from __future__ import unicode_literals
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import functools
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import logging
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import os.path
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import re
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import sys
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from pre_commit.errors import FatalError
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from pre_commit.util import CalledProcessError
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from pre_commit.util import cmd_output
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from pre_commit.util import memoize_by_cwd
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logger = logging.getLogger('pre_commit')
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def get_root():
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try:
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return cmd_output('git', 'rev-parse', '--show-toplevel')[1].strip()
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except CalledProcessError:
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raise FatalError(
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'git failed. Is it installed, and are you in a Git repository '
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'directory?'
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)
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def get_git_dir(git_root):
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return os.path.normpath(os.path.join(
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git_root,
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cmd_output('git', 'rev-parse', '--git-dir', cwd=git_root)[1].strip(),
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))
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def is_in_merge_conflict():
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git_dir = get_git_dir('.')
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return (
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os.path.exists(os.path.join(git_dir, 'MERGE_MSG')) and
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os.path.exists(os.path.join(git_dir, 'MERGE_HEAD'))
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)
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def parse_merge_msg_for_conflicts(merge_msg):
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# Conflicted files start with tabs
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return [
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line.lstrip('#').strip()
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for line in merge_msg.splitlines()
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# '#\t' for git 2.4.1
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if line.startswith(('\t', '#\t'))
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]
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@memoize_by_cwd
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def get_conflicted_files():
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logger.info('Checking merge-conflict files only.')
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# Need to get the conflicted files from the MERGE_MSG because they could
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# have resolved the conflict by choosing one side or the other
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merge_msg = open(os.path.join(get_git_dir('.'), 'MERGE_MSG')).read()
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merge_conflict_filenames = parse_merge_msg_for_conflicts(merge_msg)
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# This will get the rest of the changes made after the merge.
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# If they resolved the merge conflict by choosing a mesh of both sides
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# this will also include the conflicted files
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tree_hash = cmd_output('git', 'write-tree')[1].strip()
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merge_diff_filenames = cmd_output(
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'git', 'diff', '-m', tree_hash, 'HEAD', 'MERGE_HEAD', '--name-only',
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)[1].splitlines()
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return set(merge_conflict_filenames) | set(merge_diff_filenames)
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@memoize_by_cwd
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def get_staged_files():
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return cmd_output(
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'git', 'diff', '--staged', '--name-only',
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# Everything except for D
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'--diff-filter=ACMRTUXB'
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)[1].splitlines()
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@memoize_by_cwd
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def get_all_files():
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return cmd_output('git', 'ls-files')[1].splitlines()
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def get_files_matching(all_file_list_strategy):
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@functools.wraps(all_file_list_strategy)
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@memoize_by_cwd
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def wrapper(include_expr, exclude_expr):
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include_regex = re.compile(include_expr)
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exclude_regex = re.compile(exclude_expr)
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return set(
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filename
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for filename in all_file_list_strategy()
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if (
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include_regex.search(filename) and
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not exclude_regex.search(filename) and
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os.path.lexists(filename)
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)
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)
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return wrapper
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get_staged_files_matching = get_files_matching(get_staged_files)
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get_all_files_matching = get_files_matching(get_all_files)
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get_conflicted_files_matching = get_files_matching(get_conflicted_files)
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def check_for_cygwin_mismatch():
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"""See https://github.com/pre-commit/pre-commit/issues/354"""
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if sys.platform in ('cygwin', 'win32'): # pragma: no cover (windows)
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is_cygwin_python = sys.platform == 'cygwin'
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toplevel = cmd_output('git', 'rev-parse', '--show-toplevel')[1]
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is_cygwin_git = toplevel.startswith('/')
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if is_cygwin_python ^ is_cygwin_git:
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exe_type = {True: '(cygwin)', False: '(windows)'}
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logger.warn(
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'pre-commit has detected a mix of cygwin python / git\n'
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'This combination is not supported, it is likely you will '
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'receive an error later in the program.\n'
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'Make sure to use cygwin git+python while using cygwin\n'
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'These can be installed through the cygwin installer.\n'
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' - python {}\n'
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' - git {}\n'.format(
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exe_type[is_cygwin_python],
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exe_type[is_cygwin_git],
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)
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)
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