Repository: psf/black
File: src/black/__init__.py (Python)

Code before:
        out(error_msg if report.return_code else "All done! ✨ 🍰 ✨")
        if code is None:
            click.echo(str(report), err=True)
    ctx.exit(report.return_code)


def get_sources(
    *,
    ctx: click.Context,
    src: Tuple[str, ...],
    quiet: bool,
    verbose: bool,
    include: Pattern[str],
    exclude: Optional[Pattern[str]],
    extend_exclude: Optional[Pattern[str]],
    force_exclude: Optional[Pattern[str]],
    report: "Report",
    stdin_filename: Optional[str],
) -> Set[Path]:
    """Compute the set of files to be formatted."""
    sources: Set[Path] = set()
    root = ctx.obj["root"]

    for s in src:
        if s == "-" and stdin_filename:
            p = Path(stdin_filename)
            is_stdin = True
        else:
            p = Path(s)
            is_stdin = False

        if is_stdin or p.is_file():
            normalized_path = normalize_path_maybe_ignore(p, ctx.obj["root"], report)
            if normalized_path is None:
                continue

            normalized_path = "/" + normalized_path
            # Hard-exclude any files that matches the `--force-exclude` regex.
            if force_exclude:
                force_exclude_match = force_exclude.search(normalized_path)
            else:
                force_exclude_match = None
            if force_exclude_match and force_exclude_match.group(0):
                report.path_ignored(p, "matches the --force-exclude regular expression")
                continue

            if is_stdin:
                p = Path(f"{STDIN_PLACEHOLDER}{str(p)}")

            if p.suffix == ".ipynb" and not jupyter_dependencies_are_installed(
                verbose=verbose, quiet=quiet

Review comment (suggestion):
```suggestion
    using_default_exclude = exclude is None
    exclude = re_compile_maybe_verbose(DEFAULT_EXCLUDES) if exclude is None else exclude
    gitignore: Optional[PathSpec] = None
    root_gitignore = get_gitignore(root)
```

Code after:
        if code is None:
            click.echo(str(report), err=True)
    ctx.exit(report.return_code)


def get_sources(
    *,
    ctx: click.Context,
    src: Tuple[str, ...],
    quiet: bool,
    verbose: bool,
    include: Pattern[str],
    exclude: Optional[Pattern[str]],
    extend_exclude: Optional[Pattern[str]],
    force_exclude: Optional[Pattern[str]],
    report: "Report",
    stdin_filename: Optional[str],
) -> Set[Path]:
    """Compute the set of files to be formatted."""
    sources: Set[Path] = set()
    root = ctx.obj["root"]

    exclude_is_None = exclude is None
    exclude = re_compile_maybe_verbose(DEFAULT_EXCLUDES) if exclude is None else exclude
    gitignore = None  # type: Optional[PathSpec]
    root_gitignore = get_gitignore(root)

    for s in src:
        if s == "-" and stdin_filename:
            p = Path(stdin_filename)
            is_stdin = True
        else:
            p = Path(s)
            is_stdin = False

        if is_stdin or p.is_file():
            normalized_path = normalize_path_maybe_ignore(p, ctx.obj["root"], report)
            if normalized_path is None:
                continue

            normalized_path = "/" + normalized_path
            # Hard-exclude any files that matches the `--force-exclude` regex.
            if force_exclude:
                force_exclude_match = force_exclude.search(normalized_path)
            else:
                force_exclude_match = None
            if force_exclude_match and force_exclude_match.group(0):
                report.path_ignored(p, "matches the --force-exclude regular expression")
                continue

            if is_stdin: