Improve init-db.sh

Allow custom database parameters.
Abstract common functionality.

server/db-init.sh

@@ -1,43 +1,106 @@
-#!/bin/bash
+#!/bin/sh
 
+# Default configurations
 username=lemmy
 dbname=lemmy
 port=5432
 
-password=""
-password_confirm=""
-password_valid=0
+yes_no_prompt_invalid() {
+  echo "Invalid input. Please enter either \"y\" or \"n\"." 1>&2
+}
 
-while [ "$password_valid" == 0 ]
-do
-  read -p "Enter database password: " -s password
-  echo
+print_config() {
+  echo "  database name: $dbname"
+  echo "  username: $username"
+  echo "  port: $port"
+}
 
-  read -p "Verify database password: " -s password_confirm
-  echo
+ask_for_db_config() {
+  echo "The default database configuration is:"
+  print_config
   echo
 
-  # Start the loop from the top if either check fails
-  if [ -z "$password" ]
-  then
-    echo "Error: Password cannot be empty." 1>&2
+  default_config_final=0
+  default_config_valid=0
+  while [ "$default_config_valid" == 0 ]
+  do
+    read -p "Use this configuration (y/n)? " default_config
+    case "$default_config" in
+      [yY]* ) default_config_valid=1; default_config_final=1;;
+      [nN]* ) default_config_valid=1; default_config_final=0;;
+      * ) yes_no_prompt_invalid;;
+    esac
     echo
-    continue
-  fi
-  if [ "$password" != "$password_confirm" ]
+  done
+
+  if [ "$default_config_final" == 0 ]
   then
-    echo "Error: Passwords don't match." 1>&2
-    echo
-    continue
+    config_ok_final=0
+    while [ "$config_ok_final" == 0 ]
+    do
+      read -p "Database name:  " dbname
+      read -p "Username:  " username
+      read -p "Port:  " port
+      #echo
+      
+      #echo "The database configuration is:"
+      #print_config
+      #echo
+      
+      config_ok_valid=0
+      while [ "$config_ok_valid" == 0 ]
+      do
+        read -p "Use this configuration (y/n)? " config_ok
+        case "$config_ok" in
+          [yY]* ) config_ok_valid=1; config_ok_final=1;;
+          [nN]* ) config_ok_valid=1; config_ok_final=0;;
+          * ) yes_no_prompt_invalid;;
+        esac
+        echo
+      done
+    done
   fi
+}
+
+ask_for_password() {
+  password=""
+  password_confirm=""
+  password_valid=0
+  while [ "$password_valid" == 0 ]
+  do
+    read -p "Enter database password: " -s password
+    echo
+
+    read -p "Verify database password: " -s password_confirm
+    echo
+    echo
 
-  # Set the password_valid variable to break out of the loop
-  password_valid=1
-done
+    # Start the loop from the top if either check fails
+    if [ -z "$password" ]
+    then
+      echo "Error: Password cannot be empty." 1>&2
+      echo
+      continue
+    fi
+    if [ "$password" != "$password_confirm" ]
+    then
+      echo "Error: Passwords don't match." 1>&2
+      echo
+      continue
+    fi
 
+    # Set the password_valid variable to break out of the loop
+    password_valid=1
+  done
+}
+
+ask_for_db_config
+
+ask_for_password
 
 psql -c "CREATE USER $username WITH PASSWORD '$password' SUPERUSER;" -U postgres
 psql -c "CREATE DATABASE $dbname WITH OWNER $username;" -U postgres
 export LEMMY_DATABASE_URL=postgres://$username:$password@localhost:$port/$dbname
 
-echo $LEMMY_DATABASE_URL
+echo "The database URL is $LEMMY_DATABASE_URL"
+