feat: find Python files in Rust (#591)

Cargo.toml

@@ -11,7 +11,9 @@ crate-type = ["cdylib"]
 [dependencies]
 chardetng = "0.1.17"
 encoding_rs = "0.8.33"
+ignore = "0.4.22"
 log = "0.4.21"
+path-slash = "0.2.1"
 pyo3 = { version = "0.20.3", features = ["abi3-py38"] }
 pyo3-log = "0.9.0"
 rayon = "1.9.0"

pyproject.toml

@@ -25,7 +25,6 @@ classifiers = [
 ]
 dependencies = [
     "click>=8.0.0,<9",
-    "pathspec>=0.9.0",
     "colorama>=0.4.6; sys_platform == 'win32'",
     "tomli>=2.0.1; python_version < '3.11'"
 ]

python/deptry/core.py

@@ -14,7 +14,7 @@
 from deptry.exceptions import IncorrectDependencyFormatError, UnsupportedPythonVersionError
 from deptry.imports.extract import get_imported_modules_from_list_of_files
 from deptry.module import ModuleBuilder, ModuleLocations
-from deptry.python_file_finder import PythonFileFinder
+from deptry.python_file_finder import get_all_python_files_in
 from deptry.reporters import JSONReporter, TextReporter
 from deptry.stdlibs import STDLIBS_PYTHON
 from deptry.violations import (
@@ -65,10 +65,7 @@ def run(self) -> None:
 
         self._log_dependencies(dependencies_extract)
 
-        all_python_files = PythonFileFinder(
-            self.exclude, self.extend_exclude, self.using_default_exclude, self.ignore_notebooks
-        ).get_all_python_files_in(self.root)
-
+        python_files = self._find_python_files()
         local_modules = self._get_local_modules()
         stdlib_modules = self._get_stdlib_modules()
 
@@ -83,7 +80,7 @@ def run(self) -> None:
                 ).build(),
                 locations,
             )
-            for module, locations in get_imported_modules_from_list_of_files(all_python_files).items()
+            for module, locations in get_imported_modules_from_list_of_files(python_files).items()
         ]
         imported_modules_with_locations = [
             module_with_locations
@@ -99,6 +96,19 @@ def run(self) -> None:
 
         self._exit(violations)
 
+    def _find_python_files(self) -> list[Path]:
+        logging.debug("Collecting Python files to scan...")
+
+        python_files = get_all_python_files_in(
+            self.root, self.exclude, self.extend_exclude, self.using_default_exclude, self.ignore_notebooks
+        )
+
+        logging.debug(
+            "Python files to scan for imports:\n%s\n", "\n".join(str(python_file) for python_file in python_files)
+        )
+
+        return python_files
+
     def _find_violations(
         self, imported_modules_with_locations: list[ModuleLocations], dependencies: list[Dependency]
     ) -> list[Violation]:

python/deptry/python_file_finder.py

@@ -1,79 +1,18 @@
 from __future__ import annotations
 
-import logging
-import os
-import re
-from dataclasses import dataclass
 from pathlib import Path
-from typing import Pattern
 
-from pathspec import PathSpec
+from deptry.rust import find_python_files
 
 
-@dataclass
-class PythonFileFinder:
-    """
-    Get a list of all .py and .ipynb files recursively within a directory.
-    Args:
-        exclude: A list of regex patterns of paths to ignore.
-        extend_exclude: An additional list of regex patterns of paths to ignore.
-        using_default_exclude: Whether the exclude list was explicitly set, or the default was used.
-        ignore_notebooks: If ignore_notebooks is set to True, .ipynb files are ignored and only .py files are returned.
-    """
-
-    exclude: tuple[str, ...]
-    extend_exclude: tuple[str, ...]
-    using_default_exclude: bool
-    ignore_notebooks: bool = False
-
-    def get_all_python_files_in(self, directories: tuple[Path, ...]) -> list[Path]:
-        logging.debug("Collecting Python files to scan...")
-
-        source_files = set()
-
-        ignore_regex = re.compile("|".join(self.exclude + self.extend_exclude))
-        file_lookup_suffixes = {".py"} if self.ignore_notebooks else {".py", ".ipynb"}
-
-        gitignore_spec = self._generate_gitignore_pathspec(Path())
-
-        for directory in directories:
-            for root_str, dirs, files in os.walk(directory, topdown=True):
-                root = Path(root_str)
-
-                if self._is_directory_ignored(root, ignore_regex):
-                    dirs[:] = []
-                    continue
-
-                for file_str in files:
-                    file = root / file_str
-                    if not self._is_file_ignored(file, file_lookup_suffixes, ignore_regex, gitignore_spec):
-                        source_files.add(file)
-
-        source_files_list = list(source_files)
-
-        logging.debug("Python files to scan for imports:\n%s\n", "\n".join([str(file) for file in source_files_list]))
-
-        return source_files_list
-
-    def _is_directory_ignored(self, directory: Path, ignore_regex: Pattern[str]) -> bool:
-        return bool((self.exclude + self.extend_exclude) and ignore_regex.match(str(directory)))
-
-    def _is_file_ignored(
-        self, file: Path, file_lookup_suffixes: set[str], ignore_regex: Pattern[str], gitignore_spec: PathSpec | None
-    ) -> bool:
-        return bool(
-            file.suffix not in file_lookup_suffixes
-            or ((self.exclude + self.extend_exclude) and ignore_regex.match(file.as_posix()))
-            or (gitignore_spec and gitignore_spec.match_file(file))
-        )
-
-    def _generate_gitignore_pathspec(self, directory: Path) -> PathSpec | None:
-        # If `exclude` is explicitly set, `.gitignore` is not taken into account.
-        if not self.using_default_exclude:
-            return None
-
-        try:
-            with (directory / ".gitignore").open() as gitignore:
-                return PathSpec.from_lines("gitwildmatch", gitignore)
-        except FileNotFoundError:
-            return None
+def get_all_python_files_in(
+    directories: tuple[Path, ...],
+    exclude: tuple[str, ...],
+    extend_exclude: tuple[str, ...],
+    using_default_exclude: bool,
+    ignore_notebooks: bool = False,
+) -> list[Path]:
+    return [
+        Path(f)
+        for f in find_python_files(directories, exclude, extend_exclude, using_default_exclude, ignore_notebooks)
+    ]

python/deptry/rust.pyi

@@ -1,7 +1,16 @@
+from pathlib import Path
+
 from .rust import Location as RustLocation
 
 def get_imports_from_py_files(file_paths: list[str]) -> dict[str, list[RustLocation]]: ...
 def get_imports_from_ipynb_files(file_paths: list[str]) -> dict[str, list[RustLocation]]: ...
+def find_python_files(
+    directories: tuple[Path, ...],
+    exclude: tuple[str, ...],
+    extend_exclude: tuple[str, ...],
+    using_default_exclude: bool,
+    ignore_notebooks: bool = False,
+) -> list[str]: ...
 
 class Location:
     file: str

src/lib.rs

@@ -5,6 +5,7 @@ use pyo3::prelude::*;
 mod file_utils;
 mod imports;
 mod location;
+mod python_file_finder;
 mod visitor;
 
 use location::Location;
@@ -18,6 +19,7 @@ fn rust(_py: Python, m: &PyModule) -> PyResult<()> {
         imports::ipynb::get_imports_from_ipynb_files,
         m
     )?)?;
+    m.add_function(wrap_pyfunction!(python_file_finder::find_python_files, m)?)?;
     m.add_class::<Location>()?;
     Ok(())
 }