diff options
Diffstat (limited to 'pre_commit/commands/install_uninstall.py')
-rw-r--r-- | pre_commit/commands/install_uninstall.py | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/pre_commit/commands/install_uninstall.py b/pre_commit/commands/install_uninstall.py new file mode 100644 index 0000000..d19e0d4 --- /dev/null +++ b/pre_commit/commands/install_uninstall.py @@ -0,0 +1,167 @@ +from __future__ import annotations + +import logging +import os.path +import shlex +import shutil +import sys + +from pre_commit import git +from pre_commit import output +from pre_commit.clientlib import InvalidConfigError +from pre_commit.clientlib import load_config +from pre_commit.repository import all_hooks +from pre_commit.repository import install_hook_envs +from pre_commit.store import Store +from pre_commit.util import make_executable +from pre_commit.util import resource_text + + +logger = logging.getLogger(__name__) + +# This is used to identify the hook file we install +PRIOR_HASHES = ( + b'4d9958c90bc262f47553e2c073f14cfe', + b'd8ee923c46731b42cd95cc869add4062', + b'49fd668cb42069aa1b6048464be5d395', + b'79f09a650522a87b0da915d0d983b2de', + b'e358c9dae00eac5d06b38dfdb1e33a8c', +) +CURRENT_HASH = b'138fd403232d2ddd5efb44317e38bf03' +TEMPLATE_START = '# start templated\n' +TEMPLATE_END = '# end templated\n' + + +def _hook_types(cfg_filename: str, hook_types: list[str] | None) -> list[str]: + if hook_types is not None: + return hook_types + else: + try: + cfg = load_config(cfg_filename) + except InvalidConfigError: + return ['pre-commit'] + else: + return cfg['default_install_hook_types'] + + +def _hook_paths( + hook_type: str, + git_dir: str | None = None, +) -> tuple[str, str]: + git_dir = git_dir if git_dir is not None else git.get_git_common_dir() + pth = os.path.join(git_dir, 'hooks', hook_type) + return pth, f'{pth}.legacy' + + +def is_our_script(filename: str) -> bool: + if not os.path.exists(filename): # pragma: win32 no cover (symlink) + return False + with open(filename, 'rb') as f: + contents = f.read() + return any(h in contents for h in (CURRENT_HASH,) + PRIOR_HASHES) + + +def _install_hook_script( + config_file: str, + hook_type: str, + overwrite: bool = False, + skip_on_missing_config: bool = False, + git_dir: str | None = None, +) -> None: + hook_path, legacy_path = _hook_paths(hook_type, git_dir=git_dir) + + os.makedirs(os.path.dirname(hook_path), exist_ok=True) + + # If we have an existing hook, move it to pre-commit.legacy + if os.path.lexists(hook_path) and not is_our_script(hook_path): + shutil.move(hook_path, legacy_path) + + # If we specify overwrite, we simply delete the legacy file + if overwrite and os.path.exists(legacy_path): + os.remove(legacy_path) + elif os.path.exists(legacy_path): + output.write_line( + f'Running in migration mode with existing hooks at {legacy_path}\n' + f'Use -f to use only pre-commit.', + ) + + args = ['hook-impl', f'--config={config_file}', f'--hook-type={hook_type}'] + if skip_on_missing_config: + args.append('--skip-on-missing-config') + + with open(hook_path, 'w') as hook_file: + contents = resource_text('hook-tmpl') + before, rest = contents.split(TEMPLATE_START) + _, after = rest.split(TEMPLATE_END) + + # on windows always use `/bin/sh` since `bash` might not be on PATH + # though we use bash-specific features `sh` on windows is actually + # bash in "POSIXLY_CORRECT" mode which still supports the features we + # use: subshells / arrays + if sys.platform == 'win32': # pragma: win32 cover + hook_file.write('#!/bin/sh\n') + + hook_file.write(before + TEMPLATE_START) + hook_file.write(f'INSTALL_PYTHON={shlex.quote(sys.executable)}\n') + args_s = shlex.join(args) + hook_file.write(f'ARGS=({args_s})\n') + hook_file.write(TEMPLATE_END + after) + make_executable(hook_path) + + output.write_line(f'pre-commit installed at {hook_path}') + + +def install( + config_file: str, + store: Store, + hook_types: list[str] | None, + overwrite: bool = False, + hooks: bool = False, + skip_on_missing_config: bool = False, + git_dir: str | None = None, +) -> int: + if git_dir is None and git.has_core_hookpaths_set(): + logger.error( + 'Cowardly refusing to install hooks with `core.hooksPath` set.\n' + 'hint: `git config --unset-all core.hooksPath`', + ) + return 1 + + for hook_type in _hook_types(config_file, hook_types): + _install_hook_script( + config_file, hook_type, + overwrite=overwrite, + skip_on_missing_config=skip_on_missing_config, + git_dir=git_dir, + ) + + if hooks: + install_hooks(config_file, store) + + return 0 + + +def install_hooks(config_file: str, store: Store) -> int: + install_hook_envs(all_hooks(load_config(config_file), store), store) + return 0 + + +def _uninstall_hook_script(hook_type: str) -> None: + hook_path, legacy_path = _hook_paths(hook_type) + + # If our file doesn't exist or it isn't ours, gtfo. + if not os.path.exists(hook_path) or not is_our_script(hook_path): + return + + os.remove(hook_path) + output.write_line(f'{hook_type} uninstalled') + + if os.path.exists(legacy_path): + os.replace(legacy_path, hook_path) + output.write_line(f'Restored previous hooks to {hook_path}') + + +def uninstall(config_file: str, hook_types: list[str] | None) -> int: + for hook_type in _hook_types(config_file, hook_types): + _uninstall_hook_script(hook_type) + return 0 |