TypeVar,
Union,
cast,
+ TYPE_CHECKING,
)
from typing_extensions import Final
from mypy_extensions import mypyc_attr
from _black_version import version as __version__
+if TYPE_CHECKING:
+ import colorama # noqa: F401
+
DEFAULT_LINE_LENGTH = 88
DEFAULT_EXCLUDES = r"/(\.eggs|\.git|\.hg|\.mypy_cache|\.nox|\.tox|\.venv|\.svn|_build|buck-out|build|dist)/" # noqa: B950
DEFAULT_INCLUDES = r"\.pyi?$"
YES = 1
DIFF = 2
CHECK = 3
+ COLOR_DIFF = 4
@classmethod
- def from_configuration(cls, *, check: bool, diff: bool) -> "WriteBack":
+ def from_configuration(
+ cls, *, check: bool, diff: bool, color: bool = False
+ ) -> "WriteBack":
if check and not diff:
return cls.CHECK
+ if diff and color:
+ return cls.COLOR_DIFF
+
return cls.DIFF if diff else cls.YES
is_flag=True,
help="Don't write the files back, just output a diff for each file on stdout.",
)
+@click.option(
+ "--color/--no-color",
+ is_flag=True,
+ help="Show colored diff. Only applies when `--diff` is given.",
+)
@click.option(
"--fast/--safe",
is_flag=True,
target_version: List[TargetVersion],
check: bool,
diff: bool,
+ color: bool,
fast: bool,
pyi: bool,
py36: bool,
config: Optional[str],
) -> None:
"""The uncompromising code formatter."""
- write_back = WriteBack.from_configuration(check=check, diff=diff)
+ write_back = WriteBack.from_configuration(check=check, diff=diff, color=color)
if target_version:
if py36:
err("Cannot use both --target-version and --py36")
if write_back == WriteBack.YES:
with open(src, "w", encoding=encoding, newline=newline) as f:
f.write(dst_contents)
- elif write_back == WriteBack.DIFF:
+ elif write_back in (WriteBack.DIFF, WriteBack.COLOR_DIFF):
now = datetime.utcnow()
src_name = f"{src}\t{then} +0000"
dst_name = f"{src}\t{now} +0000"
diff_contents = diff(src_contents, dst_contents, src_name, dst_name)
+ if write_back == write_back.COLOR_DIFF:
+ diff_contents = color_diff(diff_contents)
+
with lock or nullcontext():
f = io.TextIOWrapper(
sys.stdout.buffer,
newline=newline,
write_through=True,
)
+ f = wrap_stream_for_windows(f)
f.write(diff_contents)
f.detach()
return True
+def color_diff(contents: str) -> str:
+ """Inject the ANSI color codes to the diff."""
+ lines = contents.split("\n")
+ for i, line in enumerate(lines):
+ if line.startswith("+++") or line.startswith("---"):
+ line = "\033[1;37m" + line + "\033[0m" # bold white, reset
+ if line.startswith("@@"):
+ line = "\033[36m" + line + "\033[0m" # cyan, reset
+ if line.startswith("+"):
+ line = "\033[32m" + line + "\033[0m" # green, reset
+ elif line.startswith("-"):
+ line = "\033[31m" + line + "\033[0m" # red, reset
+ lines[i] = line
+ return "\n".join(lines)
+
+
+def wrap_stream_for_windows(
+ f: io.TextIOWrapper,
+) -> Union[io.TextIOWrapper, "colorama.AnsiToWin32.AnsiToWin32"]:
+ """
+ Wrap the stream in colorama's wrap_stream so colors are shown on Windows.
+
+ If `colorama` is not found, then no change is made. If `colorama` does
+ exist, then it handles the logic to determine whether or not to change
+ things.
+ """
+ try:
+ from colorama import initialise
+
+ # We set `strip=False` so that we can don't have to modify
+ # test_express_diff_with_color.
+ f = initialise.wrap_stream(
+ f, convert=None, strip=False, autoreset=False, wrap=True
+ )
+
+ # wrap_stream returns a `colorama.AnsiToWin32.AnsiToWin32` object
+ # which does not have a `detach()` method. So we fake one.
+ f.detach = lambda *args, **kwargs: None # type: ignore
+ except ImportError:
+ pass
+
+ return f
+
+
def format_stdin_to_stdout(
fast: bool, *, write_back: WriteBack = WriteBack.NO, mode: Mode
) -> bool:
)
if write_back == WriteBack.YES:
f.write(dst)
- elif write_back == WriteBack.DIFF:
+ elif write_back in (WriteBack.DIFF, WriteBack.COLOR_DIFF):
now = datetime.utcnow()
src_name = f"STDIN\t{then} +0000"
dst_name = f"STDOUT\t{now} +0000"
- f.write(diff(src, dst, src_name, dst_name))
+ d = diff(src, dst, src_name, dst_name)
+ if write_back == WriteBack.COLOR_DIFF:
+ d = color_diff(d)
+ f = wrap_stream_for_windows(f)
+ f.write(d)
f.detach()
actual = actual.rstrip() + "\n" # the diff output has a trailing space
self.assertEqual(expected, actual)
+ def test_piping_diff_with_color(self) -> None:
+ source, _ = read_data("expression.py")
+ config = THIS_DIR / "data" / "empty_pyproject.toml"
+ args = [
+ "-",
+ "--fast",
+ f"--line-length={black.DEFAULT_LINE_LENGTH}",
+ "--diff",
+ "--color",
+ f"--config={config}",
+ ]
+ result = BlackRunner().invoke(
+ black.main, args, input=BytesIO(source.encode("utf8"))
+ )
+ actual = result.output
+ # Again, the contents are checked in a different test, so only look for colors.
+ self.assertIn("\033[1;37m", actual)
+ self.assertIn("\033[36m", actual)
+ self.assertIn("\033[32m", actual)
+ self.assertIn("\033[31m", actual)
+ self.assertIn("\033[0m", actual)
+
@patch("black.dump_to_file", dump_to_stderr)
def test_function(self) -> None:
source, expected = read_data("function")
)
self.assertEqual(expected, actual, msg)
+ def test_expression_diff_with_color(self) -> None:
+ source, _ = read_data("expression.py")
+ expected, _ = read_data("expression.diff")
+ tmp_file = Path(black.dump_to_file(source))
+ try:
+ result = BlackRunner().invoke(
+ black.main, ["--diff", "--color", str(tmp_file)]
+ )
+ finally:
+ os.unlink(tmp_file)
+ actual = result.output
+ # We check the contents of the diff in `test_expression_diff`. All
+ # we need to check here is that color codes exist in the result.
+ self.assertIn("\033[1;37m", actual)
+ self.assertIn("\033[36m", actual)
+ self.assertIn("\033[32m", actual)
+ self.assertIn("\033[31m", actual)
+ self.assertIn("\033[0m", actual)
+
@patch("black.dump_to_file", dump_to_stderr)
def test_fstring(self) -> None:
source, expected = read_data("fstring")
projects / etc / vim.git / commitdiff