Print a separate message when there are no inputs given (#999)

Fixes #886.
psf · Sep 4, 2019 · ae5588c · ae5588c
1 parent c4d2db4
commit ae5588c
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Showing 2 changed files with 14 additions and 2 deletions.
diff --git a/.gitignore b/.gitignore
@@ -8,4 +8,5 @@ __pycache__
 black.egg-info
 build/
 dist/
-pip-wheel-metadata/
+pip-wheel-metadata/
+.idea
diff --git a/black.py b/black.py
@@ -437,6 +437,7 @@ def main(
     report = Report(check=check, quiet=quiet, verbose=verbose)
     root = find_project_root(src)
     sources: Set[Path] = set()
+    path_empty(src, quiet, verbose, ctx)
     for s in src:
         p = Path(s)
         if p.is_dir():
@@ -450,7 +451,7 @@ def main(
             err(f"invalid path: {s}")
     if len(sources) == 0:
         if verbose or not quiet:
-            out("No paths given. Nothing to do 😴")
+            out("No Python files are present to be formatted. Nothing to do 😴")
         ctx.exit(0)
 
     if len(sources) == 1:
@@ -472,6 +473,16 @@ def main(
     ctx.exit(report.return_code)
 
 
+def path_empty(src: Tuple[str], quiet: bool, verbose: bool, ctx: click.Context) -> None:
+    """
+    Exit if there is no `src` provided for formatting
+    """
+    if not src:
+        if verbose or not quiet:
+            out("No Path provided. Nothing to do 😴")
+            ctx.exit(0)
+
+
 def reformat_one(
     src: Path, fast: bool, write_back: WriteBack, mode: FileMode, report: "Report"
 ) -> None: