Make src_paths behave as expected when using --resolve-all-configs and improve performance

docs/configuration/options.md

@@ -1758,7 +1758,7 @@ Explicitly set the config root for resolving all configs. When used with the --r
 
 ## Resolve All Configs
 
-Tells isort to resolve the configs for all sub-directories and sort files in terms of its closest config files.
+Tells isort to resolve the configs for all sub-directories and sort files in terms of its closest config files. When using this option, `src_paths` will resolve relative to the directory that contains the config that was used by default.
 
 **Type:** Bool  
 **Default:** `False`  

isort/settings.py

@@ -19,6 +19,7 @@
     Dict,
     FrozenSet,
     Iterable,
+    Iterator,
     List,
     Optional,
     Pattern,
@@ -806,26 +807,43 @@ def find_all_configs(path: str) -> Trie:
     """
     trie_root = Trie("default", {})
 
-    for dirpath, _, _ in os.walk(path):
-        for config_file_name in CONFIG_SOURCES:
-            potential_config_file = os.path.join(dirpath, config_file_name)
-            if os.path.isfile(potential_config_file):
-                config_data: Dict[str, Any]
-                try:
-                    config_data = _get_config_data(
-                        potential_config_file, CONFIG_SECTIONS[config_file_name]
-                    )
-                except Exception:
-                    warn(f"Failed to pull configuration information from {potential_config_file}")
-                    config_data = {}
-
-                if config_data:
-                    trie_root.insert(potential_config_file, config_data)
-                    break
+    config_sources_set = set(CONFIG_SOURCES)
+    for potential_config_file in _scanwalk_files(
+        path, exclude_fn=lambda entry: entry.name in DEFAULT_SKIP
+    ):
+        if potential_config_file.name not in config_sources_set:
+            continue
+        try:
+            config_data = _get_config_data(
+                potential_config_file.path, CONFIG_SECTIONS[potential_config_file.name]
+            )
+            if "directory" not in config_data:
+                config_data["directory"] = os.path.dirname(potential_config_file.path)
+            trie_root.insert(potential_config_file.path, config_data)
+        except Exception:
+            warn(f"Failed to pull configuration information from {potential_config_file.path}")
 
     return trie_root
 
 
+def _scanwalk_files(
+    root_path: str, exclude_fn: Callable[[os.DirEntry], bool] = None
+) -> Iterator[os.DirEntry]:
+    # depth-first walk of file system starting with root_path
+    stack: List[str] = [root_path]
+    while stack:
+        dir_path = stack.pop()
+        with os.scandir(dir_path) as it:
+            for entry in it:
+                # Avoid processing excluded files/dirs and their descendants
+                if exclude_fn and exclude_fn(entry):
+                    continue
+                if entry.is_dir():
+                    stack.append(entry.path)
+                elif entry.is_file():
+                    yield entry
+
+
 def _get_config_data(file_path: str, sections: Tuple[str, ...]) -> Dict[str, Any]:
     settings: Dict[str, Any] = {}
 

tests/unit/test_settings.py

@@ -241,6 +241,7 @@ def test_find_all_configs(tmpdir):
     pyproject_toml = """
 [tool.isort]
 profile = "hug"
+src_paths = ["src"]
 """
 
     isort_cfg = """
@@ -257,11 +258,13 @@ def test_find_all_configs(tmpdir):
     dir2 = tmpdir / "subdir2"
     dir3 = tmpdir / "subdir3"
     dir4 = tmpdir / "subdir4"
+    dir_skip = tmpdir / ".venv"
 
     dir1.mkdir()
     dir2.mkdir()
     dir3.mkdir()
     dir4.mkdir()
+    dir_skip.mkdir()
 
     setup_cfg_file = dir1 / "setup.cfg"
     setup_cfg_file.write_text(setup_cfg, "utf-8")
@@ -275,19 +278,30 @@ def test_find_all_configs(tmpdir):
     pyproject_toml_file_broken = dir4 / "pyproject.toml"
     pyproject_toml_file_broken.write_text(pyproject_toml_broken, "utf-8")
 
+    pyproject_toml_file_skip = dir_skip / "pyproject.toml"
+    pyproject_toml_file_skip.write_text(pyproject_toml, "utf-8")
+
     config_trie = settings.find_all_configs(str(tmpdir))
 
     config_info_1 = config_trie.search(str(dir1 / "test1.py"))
     assert config_info_1[0] == str(setup_cfg_file)
     assert config_info_1[0] == str(setup_cfg_file) and config_info_1[1]["profile"] == "django"
+    assert set(Config(**config_info_1[1]).src_paths) == {Path(dir1), Path(dir1, "src")}
 
     config_info_2 = config_trie.search(str(dir2 / "test2.py"))
     assert config_info_2[0] == str(pyproject_toml_file)
     assert config_info_2[0] == str(pyproject_toml_file) and config_info_2[1]["profile"] == "hug"
+    assert set(Config(**config_info_2[1]).src_paths) == {Path(dir2, "src")}
 
     config_info_3 = config_trie.search(str(dir3 / "test3.py"))
     assert config_info_3[0] == str(isort_cfg_file)
     assert config_info_3[0] == str(isort_cfg_file) and config_info_3[1]["profile"] == "black"
+    assert set(Config(**config_info_3[1]).src_paths) == {Path(dir3), Path(dir3, "src")}
 
     config_info_4 = config_trie.search(str(tmpdir / "file4.py"))
     assert config_info_4[0] == "default"
+    assert set(Config(**config_info_4[1]).src_paths) == {Path.cwd(), Path.cwd().joinpath("src")}
+
+    config_info_skip = config_trie.search(str(dir_skip / "skip.py"))
+    assert config_info_skip[0] == "default"
+    assert set(Config(**config_info_skip[1]).src_paths) == {Path.cwd(), Path.cwd().joinpath("src")}