add check for existing pgdg.list

diff --git a/templates/setup-functions b/templates/setup-functions
index ebd464a..bda845a 100755 (executable)
--- a/templates/setup-functions
+++ b/templates/setup-functions
@@ -191,8 +191,10 @@ fi
 }
 
 Add_PG_APT_Repo () {
-wget https://www.postgresql.org/media/keys/ACCC4CF8.asc | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/apt.postgresql.org.gpg >/dev/null
-sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+if [ -z /etc/apt/sources.list.d/pgdg.list ]; then
+    wget https://www.postgresql.org/media/keys/ACCC4CF8.asc | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/apt.postgresql.org.gpg >/dev/null
+    sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+fi
 }