Makefile: add style build rule

bmwill · gitster · commit 2118805b929a · 2017-08-14T15:26:22.000-07:00
Add the 'style' build rule which will run git-clang-format on the diff
between HEAD and the current worktree.  The result is a diff of
suggested changes.

Signed-off-by: Brandon Williams &lt;bmwill@google.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/Makefile b/Makefile
@@ -2440,6 +2440,10 @@ $(SP_OBJ): %.sp: %.c GIT-CFLAGS FORCE
 .PHONY: sparse $(SP_OBJ)
 sparse: $(SP_OBJ)
 
+.PHONY: style
+style:
+	git clang-format --style file --diff --extensions c,h
+
 check: common-cmds.h
 	@if sparse; \
 	then \
