Integrate verbose logging with get_sources (#3749)

Currently the verbose logging for "Sources to be formatted" is a little
suspect in that it is a completely different code path from
`get_sources`.

This can result in bugs like https://github.com/psf/black/pull/3216#issuecomment-1213557359
and generally limits the value of these logs.

This does change the "when" of this log, but the colours help separate
it from the even more verbose logs.

CHANGES.md

@@ -52,6 +52,7 @@
 <!-- Changes to Black's terminal output and error messages -->
 
 - Use aware UTC datetimes internally, avoids deprecation warning on Python 3.12 (#3728)
+- Change verbose logging to exactly mirror _Black_'s logic for source discovery (#3749)
 
 ### _Blackd_
 

src/black/__init__.py

@@ -484,26 +484,6 @@ def main(  # noqa: C901
                 fg="blue",
             )
 
-            normalized = [
-                (
-                    (source, source)
-                    if source == "-"
-                    else (normalize_path_maybe_ignore(Path(source), root), source)
-                )
-                for source in src
-            ]
-            srcs_string = ", ".join(
-                [
-                    (
-                        f'"{_norm}"'
-                        if _norm
-                        else f'\033[31m"{source} (skipping - invalid)"\033[34m'
-                    )
-                    for _norm, source in normalized
-                ]
-            )
-            out(f"Sources to be formatted: {srcs_string}", fg="blue")
-
         if config:
             config_source = ctx.get_parameter_source("config")
             user_level_config = str(find_user_pyproject_toml())
@@ -654,9 +634,15 @@ def get_sources(
             is_stdin = False
 
         if is_stdin or p.is_file():
-            normalized_path = normalize_path_maybe_ignore(p, ctx.obj["root"], report)
+            normalized_path: Optional[str] = normalize_path_maybe_ignore(
+                p, ctx.obj["root"], report
+            )
             if normalized_path is None:
+                if verbose:
+                    out(f'Skipping invalid source: "{normalized_path}"', fg="red")
                 continue
+            if verbose:
+                out(f'Found input source: "{normalized_path}"', fg="blue")
 
             normalized_path = "/" + normalized_path
             # Hard-exclude any files that matches the `--force-exclude` regex.
@@ -679,6 +665,9 @@ def get_sources(
             sources.add(p)
         elif p.is_dir():
             p = root / normalize_path_maybe_ignore(p, ctx.obj["root"], report)
+            if verbose:
+                out(f'Found input source directory: "{p}"', fg="blue")
+
             if using_default_exclude:
                 gitignore = {
                     root: root_gitignore,
@@ -699,9 +688,12 @@ def get_sources(
                 )
             )
         elif s == "-":
+            if verbose:
+                out("Found input source stdin", fg="blue")
             sources.add(p)
         else:
             err(f"invalid path: {s}")
+
     return sources