Hotfix: Fixed #1546: Unstable (non-idempotent) behavior with certain …

…src trees.

CHANGELOG.md

@@ -4,6 +4,9 @@ Changelog
 NOTE: isort follows the [semver](https://semver.org/) versioning standard.
 Find out more about isort's release policy [here](https://pycqa.github.io/isort/docs/major_releases/release_policy/).
 
+### 5.6.1 [Hotfix] October 8, 2020
+  - Fixed #1546: Unstable (non-idempotent) behavior with certain src trees.
+
 ### 5.6.0 October 7, 2020
   - Implemented #1433: Provide helpful feedback in case a custom config file is specified without a configuration.
   - Implemented #1494: Default to sorting imports within `.pxd` files.

isort/_version.py

@@ -1 +1 @@
-__version__ = "5.6.0"
+__version__ = "5.6.1"

isort/place.py

@@ -117,7 +117,10 @@ def _is_namespace_package(path: Path, src_extensions: FrozenSet[str]) -> bool:
     init_file = path / "__init__.py"
     if not init_file.exists():
         filenames = [
-            filename for filename in path.iterdir() if filename.suffix.lstrip(".") in src_extensions
+            filepath
+            for filepath in path.iterdir()
+            if filepath.suffix.lstrip(".") in src_extensions
+            or filepath.name.lower() in ("setup.cfg", "pyproject.toml")
         ]
         if filenames:
             return False

isort/settings.py

@@ -182,7 +182,7 @@ class _Config:
     directory: str = ""
     profile: str = ""
     honor_noqa: bool = False
-    src_paths: FrozenSet[Path] = frozenset()
+    src_paths: Tuple[Path, ...] = tuple()
     old_finders: bool = False
     remove_redundant_aliases: bool = False
     float_to_top: bool = False
@@ -401,11 +401,15 @@ def __init__(
         path_root = Path(combined_config.get("directory", project_root)).resolve()
         path_root = path_root if path_root.is_dir() else path_root.parent
         if "src_paths" not in combined_config:
-            combined_config["src_paths"] = frozenset((path_root, path_root / "src"))
+            combined_config["src_paths"] = (path_root / "src", path_root)
         else:
-            combined_config["src_paths"] = frozenset(
-                path_root / path for path in combined_config.get("src_paths", ())
-            )
+            src_paths: List[Path] = []
+            for src_path in combined_config.get("src_paths", ()):
+                full_path = path_root / src_path
+                if full_path not in src_paths:
+                    src_paths.append(full_path)
+
+            combined_config["src_paths"] = tuple(src_paths)
 
         if "formatter" in combined_config:
             import pkg_resources

pyproject.toml

@@ -3,7 +3,7 @@ line-length = 100
 
 [tool.poetry]
 name = "isort"
-version = "5.6.0"
+version = "5.6.1"
 description = "A Python utility / library to sort Python imports."
 authors = ["Timothy Crosley <timothy.crosley@gmail.com>"]
 license = "MIT"

tests/integration/test_projects_using_isort.py

@@ -140,3 +140,8 @@ def test_pyramid(tmpdir):
 def test_products_zopetree(tmpdir):
     git_clone("https://github.com/jugmac00/Products.ZopeTree.git", tmpdir)
     run_isort([str(tmpdir)])
+
+
+def test_dobby(tmpdir):
+    git_clone("https://github.com/rocketDuck/dobby.git", tmpdir)
+    run_isort([str(tmpdir / "tests"), str(tmpdir / "src")])