vis: introduce vis-menu helper script

This serves as a wrapper around dmenu(1) and slmenu(1), by default
the latter is preferred because it also works without an X server.

The program and its default arguments can be configured by means of
the $VIS_MENU and $VIS_MENU_ARGS environment variables.

Eventually we might decide to inlcude a stripped down version of
slmenu in the vis source tree.

1 files changed, 33 insertions, 0 deletions

diff --git a/vis-menu b/vis-menu
new file mode 100755
index 0000000..9c432ea
--- /dev/null
+++ b/vis-menu
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+PATTERN="."
+[ -z "$VIS_MENU" ] && VIS_MENU="slmenu"
+[ -z "$VIS_MENU_ARGS" ] && VIS_MENU_ARGS="-b"
+
+while [ $# -gt 0 ]; do
+	case "$1" in
+	-h|--help)
+		echo "usage: $(basename $0) [-h] [-p prompt]"
+		exit 0;
+		;;
+	-p)
+		VIS_MENU_ARGS="$VIS_MENU_ARGS -p $2"
+		shift
+		shift
+		;;
+	*)
+		break
+		;;
+	esac
+done
+
+if ! type "$VIS_MENU" >/dev/null 2>&1; then
+	if [ ! -z "$DISPLAY" ] && type "dmenu" >/dev/null 2>&1; then
+		VIS_MENU="dmenu"
+	else
+		echo "Neither slmenu nor dmenu found" >&2
+		exit 1
+	fi
+fi
+
+exec $VIS_MENU $VIS_MENU_ARGS