From 5488f154e1e047c1f74d736d09df8e871a8b9fd6 Mon Sep 17 00:00:00 2001
From: phil <phil@systemausfall.org>
Date: Sun, 16 Jul 2023 13:03:10 +0200
Subject: [PATCH] Only add group and user if they don't exist

---
 install.sh | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/install.sh b/install.sh
index 66dc675..990b345 100755
--- a/install.sh
+++ b/install.sh
@@ -1,12 +1,20 @@
 #!/usr/bin/env bash
 
-echo "Add tablet group..."
-/usr/sbin/groupadd tablet
+set -eu
+
+GROUP=tablet
+
+if ! [ $(getent group "$GROUP") ]; then
+    echo "Add tablet group..."
+    /usr/sbin/groupadd tablet
+fi
 
 read -p "Enter your local username: " user
 
-echo "Add user to group..."
-usermod -a -G tablet "$user"
+if ! [ $(groupmems -g "$GROUP" -l | grep "$user" ) ]; then
+    echo "Add user to group..."
+    usermod -a -G tablet "$user"
+fi
 
 echo "Copy files..."
 cp -r tabletmode/ /usr/local/lib/python3.11/dist-packages