[3.12] gh-122044: Don't error during gitignore filtering with no files (GH-122045...

Co-authored-by: Seth Michael Larson <seth@python.org>

diff --git a/Tools/build/generate_sbom.py b/Tools/build/generate_sbom.py
index c08568f2e00326166a65c8ea114aafb31bbe3efd..1b000c3b16a17a772357466c26643e2c56dd4eab 100644 (file)
--- a/Tools/build/generate_sbom.py
+++ b/Tools/build/generate_sbom.py
@@ -108,6 +108,10 @@ def filter_gitignored_paths(paths: list[str]) -> list[str]:
 
         '.gitignore:9:*.a    Tools/lib.a'
     """
+    # No paths means no filtering to be done.
+    if not paths:
+        return []
+
     # Filter out files in gitignore.
     # Non-matching files show up as '::<whitespace><path>'
     git_check_ignore_proc = subprocess.run(