feat: add option to use existing .env file

setup

@@ -4,34 +4,57 @@ echo '####################################################################'
 echo '# docker_postgres_setup_script                                     #'
 echo '# Dennis Buchhorn - bucde@b-eit.de                                 #'
 echo '####################################################################'
+echo '# WARNING: password is plain text input!                           #'
+echo '#                                                                  #'
+echo "# Config will be saved in '.env' file.                             #"
+echo '# (everything in plain text, even the password)                    #'
+#echo '#  #'
+echo '####################################################################'
 echo ''
 
+CONFIG_EXISTS='false'
+KEEP_CONFIG=''
+
 POSTGRES_VERSION=''
 POSTGRES_HOST_IP_ADDRESS=''
 POSTGRES_HOST_PORT=''
 POSTGRES_ADMIN_USER=''
 POSTGRES_ADMIN_PASSWORD=''
 
-POSTGRES_SHARED_HOSTING='y'
+POSTGRES_SHARED_HOSTING=''
 
-read -p 'Enter postgres version which should be used: ' POSTGRES_VERSION
-read -p 'Enter host (vm) ip address on which postgres should be accessible: ' POSTGRES_HOST_IP_ADDRESS
-read -p 'Enter host (vm) port on which postgres should be accessible: ' POSTGRES_HOST_PORT
-read -p 'Enter admin user name for postgres: ' POSTGRES_ADMIN_USER
-read -p 'Enter admin password for postgres: ' POSTGRES_ADMIN_PASSWORD
+if [ -f ".env" ]; then
+    CONFIG_EXISTS='true'
+    read -p "Config file '.env' already exists! Would you like to use this? (y/n)" KEEP_CONFIG
+fi
 
-read -p 'Would you like to modify postgres rights for shared hosting? (y/n)' POSTGRES_SHARED_HOSTING
+if [ $CONFIG_EXISTS == 'false' ] || [ $KEEP_CONFIG == 'n' ]; then
+    read -p 'Enter postgres version which should be used: ' POSTGRES_VERSION
+    read -p 'Enter host (vm) ip address on which postgres should be accessible: ' POSTGRES_HOST_IP_ADDRESS
+    read -p 'Enter host (vm) port on which postgres should be accessible: ' POSTGRES_HOST_PORT
+    read -p 'Enter admin user name for postgres: ' POSTGRES_ADMIN_USER
+    read -p 'Enter admin password for postgres: ' POSTGRES_ADMIN_PASSWORD
 
-touch .env
-echo "POSTGRES_VERSION="$POSTGRES_VERSION >> .env
-echo "POSTGRES_HOST_IP_ADDRESS="$POSTGRES_HOST_IP_ADDRESS >> .env
-echo "POSTGRES_HOST_PORT="$POSTGRES_HOST_PORT >> .env
-echo "POSTGRES_ADMIN_USER="$POSTGRES_ADMIN_USER >> .env
-echo "POSTGRES_ADMIN_PASSWORD="$POSTGRES_ADMIN_PASSWORD >> .env
+    rm -f .env
+    touch .env
+    echo "POSTGRES_VERSION="$POSTGRES_VERSION >> .env
+    echo "POSTGRES_HOST_IP_ADDRESS="$POSTGRES_HOST_IP_ADDRESS >> .env
+    echo "POSTGRES_HOST_PORT="$POSTGRES_HOST_PORT >> .env
+    echo "POSTGRES_ADMIN_USER="$POSTGRES_ADMIN_USER >> .env
+    echo "POSTGRES_ADMIN_PASSWORD="$POSTGRES_ADMIN_PASSWORD >> .env
+else
+    while read line; do
+        if [[ $line == *"POSTGRES_ADMIN_USER="* ]]; then
+            POSTGRES_ADMIN_USER=$(echo $line | cut -c 21-)
+        fi
+    done < ".env"
+fi
+
+read -p 'Would you like to modify postgres rights for shared hosting? (y/n)' POSTGRES_SHARED_HOSTING
 
 docker-compose up -d
 
-echo 'Wait a few seconds ...'
+echo 'Wait a few seconds for the container to spin up ...'
 
 sleep 5