[libvirt PATCH 3/3] syntax-check: Run flake8 on all Python scripts

[Andrea Bolognani]

Currenty we only check files that end in .py, but we have at
least a couple of scripts that don't have that suffix and we
nonetheless want to keep compliant with the code style.

Extend the sc_flake8 syntax-check rule so that any file that
contains a Python 3 shebang is fed to flake8 too.

Signed-off-by: Andrea Bolognani <abologna at redhat.com>
---
 build-aux/syntax-check.mk | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/build-aux/syntax-check.mk b/build-aux/syntax-check.mk
index 2bd7e2aae4..51a498a897 100644
--- a/build-aux/syntax-check.mk
+++ b/build-aux/syntax-check.mk
@@ -877,8 +877,10 @@ FLAKE8_IGNORE = E501,W504
 
 sc_flake8:
 	@if [ -n "$(FLAKE8)" ]; then \
-		$(VC_LIST_EXCEPT) | $(GREP) '\.py$$' | xargs \
-			$(FLAKE8) --ignore $(FLAKE8_IGNORE) --show-source; \
+		DOT_PY=$$($(VC_LIST_EXCEPT) | $(GREP) '\.py$$'); \
+		BANG_PY=$$($(VC_LIST_EXCEPT) | xargs grep -l '^#!/usr/bin/env python3$$'); \
+		ALL_PY=$$(printf "%s\n%s" "$$DOT_PY" "$$BANG_PY" | sort -u); \
+		echo "$$ALL_PY" | xargs $(FLAKE8) --ignore $(FLAKE8_IGNORE) --show-source; \
 	else \
 		echo '$(ME): skipping test $@: flake8 not installed' 1>&2; \
 	fi
-- 
2.26.3