Use optional tests for "no_python2" to simplify local testing (#2203)

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

diff --git a/src/black/__init__.py b/src/black/__init__.py
index 00d3729c8354496812f9250d1f6f6f5530572cbe..e47aa21d4352436c84db76ed6b8acbd0b8b07cac 100644 (file)
--- a/src/black/__init__.py
+++ b/src/black/__init__.py
@@ -311,8 +311,17 @@ def find_pyproject_toml(path_search_start: Tuple[str, ...]) -> Optional[str]:
     if path_pyproject_toml.is_file():
         return str(path_pyproject_toml)
 
-    path_user_pyproject_toml = find_user_pyproject_toml()
-    return str(path_user_pyproject_toml) if path_user_pyproject_toml.is_file() else None
+    try:
+        path_user_pyproject_toml = find_user_pyproject_toml()
+        return (
+            str(path_user_pyproject_toml)
+            if path_user_pyproject_toml.is_file()
+            else None
+        )
+    except PermissionError as e:
+        # We do not have access to the user-level config directory, so ignore it.
+        err(f"Ignoring user configuration directory due to {e!r}")
+        return None
 
 
 def parse_pyproject_toml(path_config: str) -> Dict[str, Any]:
@@ -483,15 +492,15 @@ def validate_regex(
 @click.option(
     "--exclude",
     type=str,
-    default=DEFAULT_EXCLUDES,
     callback=validate_regex,
     help=(
         "A regular expression that matches files and directories that should be"
         " excluded on recursive searches. An empty value means no paths are excluded."
         " Use forward slashes for directories on all platforms (Windows, too)."
-        " Exclusions are calculated first, inclusions later."
+        " Exclusions are calculated first, inclusions later. [default:"
+        f" {DEFAULT_EXCLUDES}]"
     ),
-    show_default=True,
+    show_default=False,
 )
 @click.option(
     "--extend-exclude",
@@ -578,7 +587,7 @@ def main(
     quiet: bool,
     verbose: bool,
     include: Pattern,
-    exclude: Pattern,
+    exclude: Optional[Pattern],
     extend_exclude: Optional[Pattern],
     force_exclude: Optional[Pattern],
     stdin_filename: Optional[str],
@@ -653,7 +662,7 @@ def get_sources(
     quiet: bool,
     verbose: bool,
     include: Pattern[str],
-    exclude: Pattern[str],
+    exclude: Optional[Pattern[str]],
     extend_exclude: Optional[Pattern[str]],
     force_exclude: Optional[Pattern[str]],
     report: "Report",
@@ -664,7 +673,12 @@ def get_sources(
     root = find_project_root(src)
     sources: Set[Path] = set()
     path_empty(src, "No Path provided. Nothing to do 😴", quiet, verbose, ctx)
-    gitignore = get_gitignore(root)
+
+    if exclude is None:
+        exclude = re_compile_maybe_verbose(DEFAULT_EXCLUDES)
+        gitignore = get_gitignore(root)
+    else:
+        gitignore = None
 
     for s in src:
         if s == "-" and stdin_filename:
@@ -746,6 +760,8 @@ def reformat_one(
             is_stdin = False
 
         if is_stdin:
+            if src.suffix == ".pyi":
+                mode = replace(mode, is_pyi=True)
             if format_stdin_to_stdout(fast=fast, write_back=write_back, mode=mode):
                 changed = Changed.YES
         else:
@@ -2186,7 +2202,13 @@ class LineGenerator(Visitor[Line]):
                 if docstring[0] == quote_char:
                     docstring = " " + docstring
                 if docstring[-1] == quote_char:
-                    docstring = docstring + " "
+                    docstring += " "
+                if docstring[-1] == "\\":
+                    backslash_count = len(docstring) - len(docstring.rstrip("\\"))
+                    if backslash_count % 2:
+                        # Odd number of tailing backslashes, add some padding to
+                        # avoid escaping the closing string quote.
+                        docstring += " "
             else:
                 # Add some padding if the docstring is empty.
                 docstring = " "
@@ -5613,7 +5635,15 @@ def maybe_make_parens_invisible_in_atom(node: LN, parent: LN) -> bool:
         return False
 
     if is_walrus_assignment(node):
-        if parent.type in [syms.annassign, syms.expr_stmt]:
+        if parent.type in [
+            syms.annassign,
+            syms.expr_stmt,
+            syms.assert_stmt,
+            syms.return_stmt,
+            # these ones aren't useful to end users, but they do please fuzzers
+            syms.for_stmt,
+            syms.del_stmt,
+        ]:
             return False
 
     first = node.children[0]
@@ -5736,6 +5766,13 @@ def is_simple_decorator_trailer(node: LN, last: bool = False) -> bool:
             and node.children[0].type == token.DOT
             and node.children[1].type == token.NAME
         )
+        # last trailer can be an argument-less parentheses pair
+        or (
+            last
+            and len(node.children) == 2
+            and node.children[0].type == token.LPAR
+            and node.children[1].type == token.RPAR
+        )
         # last trailer can be arguments
         or (
             last
@@ -6183,12 +6220,12 @@ def path_is_excluded(
 def gen_python_files(
     paths: Iterable[Path],
     root: Path,
-    include: Optional[Pattern[str]],
+    include: Pattern[str],
     exclude: Pattern[str],
     extend_exclude: Optional[Pattern[str]],
     force_exclude: Optional[Pattern[str]],
     report: "Report",
-    gitignore: PathSpec,
+    gitignore: Optional[PathSpec],
 ) -> Iterator[Path]:
     """Generate all files under `path` whose paths are not excluded by the
     `exclude_regex`, `extend_exclude`, or `force_exclude` regexes,
@@ -6204,8 +6241,8 @@ def gen_python_files(
         if normalized_path is None:
             continue
 
-        # First ignore files matching .gitignore
-        if gitignore.match_file(normalized_path):
+        # 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")
             continue