Added type hints/annotations to all methods

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   [#24](https://github.com/greenbone/autohooks/pull/24)
 * Add `poetry` mode to run autohooks via [poetry](https://poetry.eustace.io/)
   [#29](https://github.com/greenbone/autohooks/pull/29)
+* Added type hints/annotations to all methods [#32](https://github.com/greenbone/autohooks/pull/32)
 
 ### Changed
 

autohooks/api/__init__.py

@@ -20,5 +20,5 @@
 from autohooks.terminal import ok, fail, error, warning
 
 
-def out(message):
+def out(message: str):
     print(message)

autohooks/api/git.py

@@ -19,9 +19,17 @@
 from enum import Enum
 from pathlib import Path
 from tempfile import NamedTemporaryFile
+from types import TracebackType
+from typing import Any, List, Type, Optional, Generator, Union, TYPE_CHECKING
 
 from autohooks.utils import exec_git, get_project_root_path, GitError
 
+# https://stackoverflow.com/questions/49959656/typing-exit-in-3-5-fails-on-runtime-but-typechecks
+if TYPE_CHECKING:
+    BaseExceptionType = Type[BaseException]
+else:
+    BaseExceptionType = bool  # don't care, as long is it doesn't error
+
 __all__ = [
     'exec_git',
     'get_staged_status',
@@ -59,7 +67,7 @@ class Status(Enum):
 
 
 class StatusEntry:
-    def __init__(self, status_string, root_path=None):
+    def __init__(self, status_string: str, root_path: Path = None) -> None:
         status = status_string[:2]
         filename = status_string[3:]
 
@@ -74,35 +82,35 @@ def __init__(self, status_string, root_path=None):
         else:
             self.path = Path(filename)
 
-    def __str__(self):
+    def __str__(self) -> str:
         return '{}{} {}'.format(
             self.index.value, self.working_tree.value, str(self.path)
         )
 
-    def __repr__(self):
+    def __repr__(self) -> str:
         return '<StatusEntry {}>'.format(str(self))
 
-    def absolute_path(self):
+    def absolute_path(self) -> Path:
         if self.root_path:
             return (self.root_path / self.path).resolve()
         return self.path.resolve()
 
 
-def _parse_status(output):
+def _parse_status(output: str) -> Generator[str, None, None]:
     output = output.rstrip('\0')
     if not output:
         return
 
-    output = output.split('\0')
-    while output:
-        line = output.pop(0)
+    output_list = output.split('\0')
+    while output_list:
+        line = output_list.pop(0)
         if line[0] == Status.RENAMED.value:
-            yield '{}\0{}'.format(line, output.pop(0))
+            yield '{}\0{}'.format(line, output_list.pop(0))
         else:
             yield line
 
 
-def is_staged_status(status):
+def is_staged_status(status: StatusEntry) -> bool:
     return (
         status.index != Status.UNMODIFIED
         and status.index != Status.UNTRACKED
@@ -111,7 +119,7 @@ def is_staged_status(status):
     )
 
 
-def is_partially_staged_status(status):
+def is_partially_staged_status(status: StatusEntry) -> bool:
     return (
         status.index != Status.UNMODIFIED
         and status.index != Status.UNTRACKED
@@ -123,7 +131,7 @@ def is_partially_staged_status(status):
     )
 
 
-def get_status(files=None):
+def get_status(files: List[Union[Path, str]] = None) -> List[StatusEntry]:
     args = [
         'status',
         '--porcelain=v1',
@@ -141,17 +149,19 @@ def get_status(files=None):
     return [StatusEntry(f, root_path) for f in _parse_status(output)]
 
 
-def get_staged_status(files=None):
+def get_staged_status(
+    files: List[Union[Path, str]] = None
+) -> List[StatusEntry]:
     status = get_status(files)
     return [s for s in status if is_staged_status(s)]
 
 
-def stage_files_from_status_list(status_list):
+def stage_files_from_status_list(status_list: List[StatusEntry]) -> None:
     filenames = [str(s.path) for s in status_list]
     exec_git('add', *filenames)
 
 
-def get_diff(files=None):
+def get_diff(files: List[StatusEntry] = None) -> str:
     args = ['--no-pager', 'diff']
 
     if files is not None:
@@ -161,24 +171,24 @@ def get_diff(files=None):
     return exec_git(*args)
 
 
-def _write_tree():
+def _write_tree() -> str:
     return exec_git('write-tree').strip()
 
 
-def _read_tree(ref_or_hashid):
+def _read_tree(ref_or_hashid: str) -> None:
     exec_git('read-tree', ref_or_hashid)
 
 
-def _checkout_from_index(status_list):
+def _checkout_from_index(status_list: List[StatusEntry]) -> None:
     filenames = [str(s.path) for s in status_list]
     exec_git('checkout-index', '-f', '--', *filenames)
 
 
-def _set_ref(name, hashid):
+def _set_ref(name: str, hashid: str) -> None:
     exec_git('update-ref', name, hashid)
 
 
-def _get_tree_diff(tree1, tree2):
+def _get_tree_diff(tree1: str, tree2: str) -> bytes:
     return subprocess.check_output(
         [
             'git',
@@ -194,7 +204,7 @@ def _get_tree_diff(tree1, tree2):
     )
 
 
-def _apply_diff(patch):
+def _apply_diff(patch: bytes) -> None:
     with NamedTemporaryFile(mode='wb', buffering=0) as f:
         f.write(patch)
 
@@ -214,12 +224,12 @@ def _apply_diff(patch):
 
 
 class stash_unstaged_changes:  # pylint: disable=invalid-name
-    def __init__(self, status_list):
+    def __init__(self, status_list: List[StatusEntry]) -> None:
         self.partially_staged = [
             s for s in status_list if is_partially_staged_status(s)
         ]
 
-    def stash_changes(self):
+    def stash_changes(self) -> None:
         # save current staging area aka. index
         self.index = _write_tree()
         # add ref to be able to restore index manually
@@ -236,17 +246,22 @@ def stash_changes(self):
         _read_tree(self.index)
         _checkout_from_index(self.partially_staged)
 
-    def restore_working_tree(self):
+    def restore_working_tree(self) -> None:
         # restore working tree
         _read_tree(self.working_tree)
         # checkout working tree
         _checkout_from_index(self.partially_staged)
 
-    def __enter__(self):
+    def __enter__(self) -> None:
         if self.partially_staged:
             self.stash_changes()
 
-    def __exit__(self, exc_type, exc_value, traceback):
+    def __exit__(
+        self,
+        exc_type: Optional[BaseExceptionType],
+        exc_value: Optional[BaseException],
+        traceback: Optional[TracebackType],
+    ) -> Any:
         if not self.partially_staged:
             return
 

autohooks/api/path.py

@@ -17,14 +17,17 @@
 
 import fnmatch
 
+from typing import Iterable
+from pathlib import Path
 
-def is_python_path(path):
+
+def is_python_path(path: Path) -> bool:
     if not path:
         return False
     return path.match('*.py')
 
 
-def match(path, pattern_list):
+def match(path: Path, pattern_list: Iterable) -> bool:
     """
     Check if a Path matches to one of the patterns
 

autohooks/cli/activate.py

@@ -17,6 +17,8 @@
 
 import sys
 
+from argparse import Namespace
+
 from autohooks.config import (
     load_config_from_pyproject_toml,
     get_pyproject_toml_path,
@@ -30,7 +32,7 @@
 from autohooks.setting import Mode
 
 
-def install_hooks(args):
+def install_hooks(args: Namespace) -> None:
     pre_commit_hook_path = get_pre_commit_hook_path()
     pyproject_toml = get_pyproject_toml_path()
     config = load_config_from_pyproject_toml(pyproject_toml)

autohooks/cli/check.py

@@ -36,7 +36,7 @@
 from autohooks.terminal import ok, error, warning
 
 
-def check_hooks():
+def check_hooks() -> None:
     pre_commit_hook = get_pre_commit_hook_path()
 
     if pre_commit_hook.is_file():

autohooks/config.py

@@ -15,6 +15,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from typing import Dict, List
+from pathlib import Path
+
 import toml
 
 from autohooks.setting import Mode
@@ -24,45 +27,45 @@
 
 
 class Config:
-    def __init__(self, config_dict=None):
+    def __init__(self, config_dict: Dict = None) -> None:
         self._config_dict = config_dict or {}
 
-    def get(self, *keys):
+    def get(self, *keys: str) -> 'Config':
         config_dict = self._config_dict
 
         for key in keys:
             config_dict = config_dict.get(key, {})
 
         return Config(config_dict)
 
-    def get_value(self, key, default=None):
+    def get_value(self, key: str, default: List[str] = None) -> List[str]:
         return self._config_dict.get(key, default)
 
-    def is_empty(self):
-        return False if self._config_dict else True
+    def is_empty(self) -> bool:
+        return not bool(self._config_dict)
 
 
 class AutohooksConfig:
-    def __init__(self, config_dict=None):
+    def __init__(self, config_dict: Dict = None) -> None:
         self._config = Config(config_dict)
         self._autohooks_config = self._config.get('tool').get('autohooks')
 
-    def has_config(self):
+    def has_config(self) -> bool:
         return not self._config.is_empty()
 
-    def has_autohooks_config(self):
+    def has_autohooks_config(self) -> bool:
         return not self._autohooks_config.is_empty()
 
-    def is_autohooks_enabled(self):
+    def is_autohooks_enabled(self) -> bool:
         return self.has_autohooks_config()
 
-    def get_pre_commit_script_names(self):
+    def get_pre_commit_script_names(self) -> List[str]:
         if self.has_autohooks_config():
             return self._autohooks_config.get_value('pre-commit', [])
 
         return []
 
-    def get_mode(self):
+    def get_mode(self) -> Mode:
         if self.has_autohooks_config():
             mode = self._autohooks_config.get_value('mode')
             if not mode:
@@ -79,7 +82,9 @@ def get_config(self):
         return self._config
 
 
-def load_config_from_pyproject_toml(pyproject_toml=None):
+def load_config_from_pyproject_toml(
+    pyproject_toml: Path = None
+) -> AutohooksConfig:
     if pyproject_toml is None:
         pyproject_toml = get_pyproject_toml_path()
 

autohooks/install.py

@@ -15,39 +15,43 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from pathlib import Path
+
 from setuptools.command.install import install
 from setuptools.command.develop import develop
 
 from autohooks.config import load_config_from_pyproject_toml
 from autohooks.template import PreCommitTemplate
-
+from autohooks.setting import Mode
 from autohooks.utils import get_git_hook_directory_path
 
 
-def get_pre_commit_hook_path():
+def get_pre_commit_hook_path() -> Path:
     git_hook_dir_path = get_git_hook_directory_path()
     return git_hook_dir_path / 'pre-commit'
 
 
-def get_autohooks_pre_commit_hook(mode):
+def get_autohooks_pre_commit_hook(mode: Mode) -> str:
     template = PreCommitTemplate()
 
     return template.render(mode=mode)
 
 
-def is_autohooks_pre_commit_hook(path):
+def is_autohooks_pre_commit_hook(path: Path) -> bool:
     hook = path.read_text()
     lines = hook.split('\n')
     return len(lines) > 5 and "autohooks.precommit" in lines[5]
 
 
-def install_pre_commit_hook(pre_commit_hook, pre_commit_hook_path):
+def install_pre_commit_hook(
+    pre_commit_hook: str, pre_commit_hook_path: Path
+) -> None:
     pre_commit_hook_path.write_text(pre_commit_hook)
     pre_commit_hook_path.chmod(0o775)
 
 
 class AutohooksInstall:
-    def install_git_hook(self):
+    def install_git_hook(self) -> None:
         try:
             pre_commit_hook_path = get_pre_commit_hook_path()
             if not pre_commit_hook_path.exists():
@@ -63,12 +67,12 @@ def install_git_hook(self):
 
 
 class PostInstall(install, AutohooksInstall):
-    def run(self):
+    def run(self) -> None:
         super().run()
         self.install_git_hook()
 
 
 class PostDevelop(develop, AutohooksInstall):
-    def install_for_development(self):
+    def install_for_development(self) -> None:
         super().install_for_development()
         self.install_git_hook()