# [PATCH 4/6] Only invoke pager if there's any output

1 messages from 2005-06-09 to 2005-06-09. Participants: Dan Holmsand.
Thread: https://gitlist.dev/t/880

## Dan Holmsand, 2005-06-09 11:21

Subject: [PATCH 4/6] Only invoke pager if there's any output
Message-ID: <42A82636.1060505@gmail.com>
URL: https://gitlist.dev/e/42A82636.1060505%40gmail.com

```
This avoids annoying empty "less" window if there's no output
from cg-diff, for example.

Signed-off-by: Dan Holmsand <holmsand@gmail.com>
---



 cg-Xlib |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/cg-Xlib b/cg-Xlib
--- a/cg-Xlib
+++ b/cg-Xlib
@@ -22,7 +22,11 @@ usage() {
 }
 
 pager () {
-	LESS="R$LESS" ${PAGER:-less} $PAGER_FLAGS
+	# Invoke $PAGER if there is any output
+	local line
+	if read -r line; then
+		( echo "$line"; cat ) | LESS="-R $LESS" ${PAGER:-less}
+	fi
 }
 
 mktemp () {

```