[libvirt] [PATCH v2] maint: prohibit empty first lines

[Martin Kletzander]

Based on discussion with Eric:

https://www.redhat.com/archives/libvir-list/2014-March/msg01001.html

Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
v2:
 - rebase on current master and s/FILENAME:1:/FILENAME ":1:"/

 cfg.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/cfg.mk b/cfg.mk
index 675af21..80440b5 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -938,6 +938,13 @@ sc_require_locale_h:
 		fi;															\
 	done;

+sc_prohibit_empty_first_line:
+	@awk 'BEGIN { fail=0; }                                        \
+	FNR == 1 { if ($$0 == "") { print FILENAME ":1:"; fail=1; } }     \
+	END { if (fail == 1) {                                         \
+	  print "$(ME): Prohibited empty first line" > "/dev/stderr";  \
+	} exit fail; }' $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$');
+
 # We don't use this feature of maint.mk.
 prev_version_file = /dev/null

--
2.0.0