[trivial] Simplify stdin handling

[etc/vim.git] / black.py

diff --git a/black.py b/black.py
index 4599bdd98a9ae536bb25c27d4b3d1511e0523f17..0dce397e768fee2973537f157b4903c3d858390d 100644 (file)
--- a/black.py
+++ b/black.py
@@ -46,6 +46,10 @@ from blib2to3.pgen2.parse import ParseError
 
 __version__ = "18.5b1"
 DEFAULT_LINE_LENGTH = 88
 
 __version__ = "18.5b1"
 DEFAULT_LINE_LENGTH = 88

+DEFAULT_EXCLUDES = (
+    r"/(\.git|\.hg|\.mypy_cache|\.tox|\.venv|_build|buck-out|build|dist)/"
+)
+DEFAULT_INCLUDES = r"\.pyi?$"

 CACHE_DIR = Path(user_cache_dir("black", version=__version__))
 
 
 CACHE_DIR = Path(user_cache_dir("black", version=__version__))
 
 


@@ -138,6 +142,29 @@ class FileMode(Flag):
     help="How many character per line to allow.",
     show_default=True,
 )
     help="How many character per line to allow.",
     show_default=True,
 )

+@click.option(
+    "--py36",
+    is_flag=True,
+    help=(
+        "Allow using Python 3.6-only syntax on all input files.  This will put "
+        "trailing commas in function signatures and calls also after *args and "
+        "**kwargs.  [default: per-file auto-detection]"
+    ),
+)
+@click.option(
+    "--pyi",
+    is_flag=True,
+    help=(
+        "Format all input files like typing stubs regardless of file extension "
+        "(useful when piping source on standard input)."
+    ),
+)
+@click.option(
+    "-S",
+    "--skip-string-normalization",
+    is_flag=True,
+    help="Don't normalize string quotes or prefixes.",
+)

 @click.option(
     "--check",
     is_flag=True,
 @click.option(
     "--check",
     is_flag=True,


@@ -158,37 +185,39 @@ class FileMode(Flag):
     help="If --fast given, skip temporary sanity checks. [default: --safe]",
 )
 @click.option(
     help="If --fast given, skip temporary sanity checks. [default: --safe]",
 )
 @click.option(

-    "-q",
-    "--quiet",
-    is_flag=True,
+    "--include",
+    type=str,
+    default=DEFAULT_INCLUDES,

     help=(
     help=(

-        "Don't emit non-error messages to stderr. Errors are still emitted, "
-        "silence those with 2>/dev/null."
+        "A regular expression that matches files and directories that should be "
+        "included on recursive searches.  An empty value means all files are "
+        "included regardless of the name.  Use forward slashes for directories on "
+        "all platforms (Windows, too).  Exclusions are calculated first, inclusions "
+        "later."

     ),
     ),

+    show_default=True,

 )
 @click.option(
 )
 @click.option(

-    "--pyi",
-    is_flag=True,
+    "--exclude",
+    type=str,
+    default=DEFAULT_EXCLUDES,

     help=(
     help=(

-        "Consider all input files typing stubs regardless of file extension "
-        "(useful when piping source on standard input)."
+        "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."

     ),
     ),

+    show_default=True,

 )
 @click.option(
 )
 @click.option(

-    "--py36",
+    "-q",
+    "--quiet",

     is_flag=True,
     help=(
     is_flag=True,
     help=(

-        "Allow using Python 3.6-only syntax on all input files.  This will put "
-        "trailing commas in function signatures and calls also after *args and "
-        "**kwargs.  [default: per-file auto-detection]"
+        "Don't emit non-error messages to stderr. Errors are still emitted, "
+        "silence those with 2>/dev/null."

     ),
 )
     ),
 )

-@click.option(
-    "-S",
-    "--skip-string-normalization",
-    is_flag=True,
-    help="Don't normalize string quotes or prefixes.",
-)

 @click.version_option(version=__version__)
 @click.argument(
     "src",
 @click.version_option(version=__version__)
 @click.argument(
     "src",


@@ -208,19 +237,32 @@ def main(
     py36: bool,
     skip_string_normalization: bool,
     quiet: bool,
     py36: bool,
     skip_string_normalization: bool,
     quiet: bool,

+    include: str,
+    exclude: str,

     src: List[str],
 ) -> None:
     """The uncompromising code formatter."""
     sources: List[Path] = []
     src: List[str],
 ) -> None:
     """The uncompromising code formatter."""
     sources: List[Path] = []

+    try:
+        include_regex = re.compile(include)
+    except re.error:
+        err(f"Invalid regular expression for include given: {include!r}")
+        ctx.exit(2)
+    try:
+        exclude_regex = re.compile(exclude)
+    except re.error:
+        err(f"Invalid regular expression for exclude given: {exclude!r}")
+        ctx.exit(2)
+    root = find_project_root(src)

     for s in src:
         p = Path(s)
         if p.is_dir():
     for s in src:
         p = Path(s)
         if p.is_dir():

-            sources.extend(gen_python_files_in_dir(p))
-        elif p.is_file():
+            sources.extend(
+                gen_python_files_in_dir(p, root, include_regex, exclude_regex)
+            )
+        elif p.is_file() or s == "-":

             # if a file was explicitly given, we don't care about its extension
             sources.append(p)
             # if a file was explicitly given, we don't care about its extension
             sources.append(p)

-        elif s == "-":
-            sources.append(Path("-"))

         else:
             err(f"invalid path: {s}")
 
         else:
             err(f"invalid path: {s}")
 


@@ -301,8 +343,8 @@ def reformat_one(
             cache: Cache = {}
             if write_back != WriteBack.DIFF:
                 cache = read_cache(line_length, mode)
             cache: Cache = {}
             if write_back != WriteBack.DIFF:
                 cache = read_cache(line_length, mode)

-                src = src.resolve()
-                if src in cache and cache[src] == get_cache_info(src):
+                res_src = src.resolve()
+                if res_src in cache and cache[res_src] == get_cache_info(res_src):

                     changed = Changed.CACHED
             if changed is not Changed.CACHED and format_file_in_place(
                 src,
                     changed = Changed.CACHED
             if changed is not Changed.CACHED and format_file_in_place(
                 src,


@@ -2750,33 +2792,57 @@ def get_future_imports(node: Node) -> Set[str]:
     return imports
 
 
     return imports
 
 

-PYTHON_EXTENSIONS = {".py", ".pyi"}
-BLACKLISTED_DIRECTORIES = {
-    "build",
-    "buck-out",
-    "dist",
-    "_build",
-    ".git",
-    ".hg",
-    ".mypy_cache",
-    ".tox",
-    ".venv",
-}
-
-
-def gen_python_files_in_dir(path: Path) -> Iterator[Path]:
-    """Generate all files under `path` which aren't under BLACKLISTED_DIRECTORIES
-    and have one of the PYTHON_EXTENSIONS.
+def gen_python_files_in_dir(
+    path: Path, root: Path, include: Pattern[str], exclude: Pattern[str]
+) -> Iterator[Path]:
+    """Generate all files under `path` whose paths are not excluded by the
+    `exclude` regex, but are included by the `include` regex.

     """
     """

+    assert root.is_absolute(), f"INTERNAL ERROR: `root` must be absolute but is {root}"

     for child in path.iterdir():
     for child in path.iterdir():

+        normalized_path = child.resolve().relative_to(root).as_posix()

         if child.is_dir():
         if child.is_dir():

-            if child.name in BLACKLISTED_DIRECTORIES:
-                continue
+            normalized_path += "/"
+        exclude_match = exclude.search(normalized_path)
+        if exclude_match and exclude_match.group(0):
+            continue
+
+        if child.is_dir():
+            yield from gen_python_files_in_dir(child, root, include, exclude)
+
+        elif child.is_file():
+            include_match = include.search(normalized_path)
+            if include_match:
+                yield child
+
+
+def find_project_root(srcs: List[str]) -> Path:
+    """Return a directory containing .git, .hg, or pyproject.toml.
+
+    That directory can be one of the directories passed in `srcs` or their
+    common parent.
+
+    If no directory in the tree contains a marker that would specify it's the
+    project root, the root of the file system is returned.
+    """
+    if not srcs:
+        return Path("/").resolve()
+
+    common_base = min(Path(src).resolve() for src in srcs)
+    if common_base.is_dir():
+        # Append a fake file so `parents` below returns `common_base_dir`, too.
+        common_base /= "fake-file"
+    for directory in common_base.parents:
+        if (directory / ".git").is_dir():
+            return directory
+
+        if (directory / ".hg").is_dir():
+            return directory

 
 

-            yield from gen_python_files_in_dir(child)
+        if (directory / "pyproject.toml").is_file():
+            return directory

 
 

-        elif child.is_file() and child.suffix in PYTHON_EXTENSIONS:
-            yield child
+    return directory

 
 
 @dataclass
 
 
 @dataclass