Compare each .gitignore found with an appropiate relative path (#3338)

[etc/vim.git] / src / black / files.py

diff --git a/src/black/files.py b/src/black/files.py
index 52c77c63346ce36eddb6417cdab8061994567cbb..ea517f4ece9c2c2bbeaef35d2714ccdf50511992 100644 (file)
--- a/src/black/files.py
+++ b/src/black/files.py
@@ -1,9 +1,10 @@
-from functools import lru_cache
 import io
 import os
-from pathlib import Path
 import sys
+from functools import lru_cache
+from pathlib import Path
 from typing import (
+    TYPE_CHECKING,
     Any,
     Dict,
     Iterable,
@@ -14,7 +15,6 @@ from typing import (
     Sequence,
     Tuple,
     Union,
-    TYPE_CHECKING,
 )
 
 from mypy_extensions import mypyc_attr
@@ -22,20 +22,27 @@ from pathspec import PathSpec
 from pathspec.patterns.gitwildmatch import GitWildMatchPatternError
 
 if sys.version_info >= (3, 11):
-    import tomllib
+    try:
+        import tomllib
+    except ImportError:
+        # Help users on older alphas
+        if not TYPE_CHECKING:
+            import tomli as tomllib
 else:
     import tomli as tomllib
 
+from black.handle_ipynb_magics import jupyter_dependencies_are_installed
 from black.output import err
 from black.report import Report
-from black.handle_ipynb_magics import jupyter_dependencies_are_installed
 
 if TYPE_CHECKING:
     import colorama  # noqa: F401
 
 
 @lru_cache()
-def find_project_root(srcs: Sequence[str]) -> Tuple[Path, str]:
+def find_project_root(
+    srcs: Sequence[str], stdin_filename: Optional[str] = None
+) -> Tuple[Path, str]:
     """Return a directory containing .git, .hg, or pyproject.toml.
 
     That directory will be a common parent of all files and directories
@@ -48,6 +55,8 @@ def find_project_root(srcs: Sequence[str]) -> Tuple[Path, str]:
     the second element as a string describing the method by which the
     project root was discovered.
     """
+    if stdin_filename is not None:
+        srcs = tuple(stdin_filename if s == "-" else s for s in srcs)
     if not srcs:
         srcs = [str(Path.cwd().resolve())]
 
@@ -173,6 +182,19 @@ def normalize_path_maybe_ignore(
     return root_relative_path
 
 
+def path_is_ignored(
+    path: Path, gitignore_dict: Dict[Path, PathSpec], report: Report
+) -> bool:
+    for gitignore_path, pattern in gitignore_dict.items():
+        relative_path = normalize_path_maybe_ignore(path, gitignore_path, report)
+        if relative_path is None:
+            break
+        if pattern.match_file(relative_path):
+            report.path_ignored(path, "matches a .gitignore file content")
+            return True
+    return False
+
+
 def path_is_excluded(
     normalized_path: str,
     pattern: Optional[Pattern[str]],
@@ -189,7 +211,7 @@ def gen_python_files(
     extend_exclude: Optional[Pattern[str]],
     force_exclude: Optional[Pattern[str]],
     report: Report,
-    gitignore: Optional[PathSpec],
+    gitignore_dict: Optional[Dict[Path, PathSpec]],
     *,
     verbose: bool,
     quiet: bool,
@@ -202,6 +224,7 @@ def gen_python_files(
 
     `report` is where output about exclusions goes.
     """
+
     assert root.is_absolute(), f"INTERNAL ERROR: `root` must be absolute but is {root}"
     for child in paths:
         normalized_path = normalize_path_maybe_ignore(child, root, report)
@@ -209,8 +232,7 @@ def gen_python_files(
             continue
 
         # First ignore files matching .gitignore, if passed
-        if gitignore is not None and gitignore.match_file(normalized_path):
-            report.path_ignored(child, "matches the .gitignore file content")
+        if gitignore_dict and path_is_ignored(child, gitignore_dict, report):
             continue
 
         # Then ignore with `--exclude` `--extend-exclude` and `--force-exclude` options.
@@ -235,6 +257,13 @@ def gen_python_files(
         if child.is_dir():
             # If gitignore is None, gitignore usage is disabled, while a Falsey
             # gitignore is when the directory doesn't have a .gitignore file.
+            if gitignore_dict is not None:
+                new_gitignore_dict = {
+                    **gitignore_dict,
+                    root / child: get_gitignore(child),
+                }
+            else:
+                new_gitignore_dict = None
             yield from gen_python_files(
                 child.iterdir(),
                 root,
@@ -243,7 +272,7 @@ def gen_python_files(
                 extend_exclude,
                 force_exclude,
                 report,
-                gitignore + get_gitignore(child) if gitignore is not None else None,
+                new_gitignore_dict,
                 verbose=verbose,
                 quiet=quiet,
             )