File quilt-support-vimdiff.patch of Package quilt

From: Jean Delvare <jdelvare@suse.de>
Subject: Fix interaction between quilt and vimdiff
References: bnc#749563

Using vimdiff as a diff viewer in quilt breaks if QUILT_PAGER is set.
So inhibit the pager in that case. Other diff viewers may be affected
as well but I don't know how to fix this in a generic way, short of
inhibiting the pager as soon as option --diff is passed to the diff
command. Not sure if this desirable though, as I presume
non-interactive alternative diff viewers must exist too.
---
 quilt/diff.in |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
--- a/quilt/diff.in
+++ b/quilt/diff.in
@@ -53,7 +53,9 @@ included.
 
 --diff=utility
 	Use the specified utility for generating the diff. The utility
-	is invoked with the original and new file name as arguments.
+	is invoked with the original and new file name as arguments.  If
+	using an interactive text-mode diff viewer that is not known to
+	quilt, you will have to unset QUILT_PAGER for proper result.
 
 --color[=always|auto|never]
 	Use syntax coloring (auto activates it only if the output is a tty).
@@ -214,6 +216,13 @@ fi
 
 QUILT_DIFF_OPTS="$QUILT_DIFF_OPTS $opt_format"
 
+# Inhibit pager for interactive text-mode diff viewers
+case "$(basename $opt_diff)" in
+vimdiff)
+	QUILT_PAGER=
+	;;
+esac
+
 opt_files=( $(for file in "$@"; do echo "$SUBDIR${file#./}" ; done) )
 
 if [ $[0$opt_combine + 0$opt_snapshot + 0$opt_relative] -gt 1 ]