Fixes: #5142, closes: #5143 - contrib/packager.io/preinstall.sh does …

…not check the db adapter setting and fails if both psql and mysql are installed

Make sure the correct database is used depending on the adapter setting

contrib/packager.io/preinstall.sh

@@ -18,6 +18,7 @@ if [[ -f /opt/zammad/config/database.yml ]]; then
    DB_USER="$(grep -m 1 '^[[:space:]]*username:' < /opt/zammad/config/database.yml | sed -e 's/.*username:[[:space:]]*//g')"
    DB_PASS="$(grep -m 1 '^[[:space:]]*password:' < /opt/zammad/config/database.yml | sed -e 's/.*password:[[:space:]]*//g')"
    DB_SOCKET="$(grep -m 1 '^[[:space:]]*socket:' < /opt/zammad/config/database.yml | sed -e 's/.*socket:[[:space:]]*//g')"
+   DB_ADAPTER="$(grep -m 1 '^[[:space:]]*adapter:' < /opt/zammad/config/database.yml | sed -e 's/.*adapter:[[:space:]]*//g')"
 else
    # Skip this whole script if we can't find our database file
    echo "Warning: Could not find database.yml"
@@ -27,7 +28,7 @@ fi
 if [ "${DB_HOST}x" == "x" ]; then
    DB_HOST="localhost"
 fi
-if [ -n "$(which psql 2> /dev/null)" ]; then
+if [ -n "$(which psql 2> /dev/null)" ] && [ "${DB_ADAPTER}" == 'postgresql' ]; then
    if [ "${DB_PORT}x" == "x" ]; then
       DB_PORT="5432"
    fi
@@ -38,7 +39,7 @@ if [ -n "$(which psql 2> /dev/null)" ]; then
       pg_isready -q
       state=$?
    fi
-elif [ -n "$(which mysql 2> /dev/null)" ]; then
+elif [ -n "$(which mysql 2> /dev/null)" ] && [ "${DB_ADAPTER}" == 'mysql2' ]; then
    if [ "${DB_PORT}x" == "x" ]; then
       DB_PORT="3306"
    fi