Modified to use apache conf template and take app offline during upgrade

install.sh

@@ -201,10 +201,37 @@ then
                 abort_exit
             else
                 # proceed with upgrade
-                
-                # take app offline during upgrade
+                # put app in maintenance mode
+                echo "Putting the applocation in maintenance mode..."
+                # make sure mod_rewrite is enabled
+                if [[ ! -e "$APACHE_CONF_DIR/../mods-enabled/rewrite.load" ]]
+                then
+                    a2enmod -q rewrite
+                    systemctl restart apache2
+                fi
+                # disable the app
                 a2disconf -q $install_loc_in 
                 systemctl reload apache2
+                # modify the apache conf file
+                if ! grep -q "RewriteEngine" "$APACHE_CONF_DIR/$install_loc_in.conf"
+                then
+                    # this is an old version of the conf file. Replace with new version
+                    cp -f default-apache.conf $APACHE_CONF_DIR/$install_loc_in.conf
+                    sed -i "s|_APPNAME_|$APP_NAME|g" $APACHE_CONF_DIR/$install_loc_in.conf
+                    sed -i "s|_BASEURL_|$install_loc_in|g" $APACHE_CONF_DIR/$install_loc_in.conf
+                    sed -i "s|_DOCROOTIN_|$doc_root_in|g" $APACHE_CONF_DIR/$install_loc_in.conf
+                fi
+                sed -i "s|#Rewrite|Rewrite|g" $APACHE_CONF_DIR/$install_loc_in.conf
+                # copy in the default maintenancemode.php if it's not already there
+                if [[ ! -e "$install_path/maintenancemode.php" ]]
+                then
+                    cp maintenancemode.php $install_path/
+                    # modify the maintenancemode.php file
+                    sed -i "s|_APPNAME_|$APP_NAME|g" $install_path/maintenancemode.php
+                fi
+                # re-enable the app in maintenance mode
+                a2enconf -q $install_loc_in
+                systemctl reload apache2
                 
                 datestamp=$(date +%Y-%m-%d_%H:%M:%S)
                 backupdir=backups/$datestamp
@@ -231,8 +258,8 @@ then
                 echo "Backing up current installation to the package directory."
                 cp -R $install_path $backupdir/$install_loc_in-$datestamp-backup
                 
-                # delete all existing installation files except db.php
-                find $install_path/ -mindepth 1 -not -name 'db.php' -delete
+                # delete all existing installation files except db.php and maintenancemode.php
+                find $install_path/ -mindepth 1 ! \( -name 'db.php' -o -name 'maintenancemode.php' \) -delete
                 
                 echo "Performing database updates..."
                 # apply database updates from sql file
@@ -271,6 +298,17 @@ then
                 chown -R $httpd_user_group $install_path
                 echo "Backups of the previous openlog files and the previous database were made"
                 echo "and are located in the $backupdir directory."
+
+                # take app out of maintenance mode
+                echo "Taking the app out of maintenance mode..."
+                # disable the app
+                a2disconf -q $install_loc_in 
+                systemctl reload apache2
+                # modify the apache conf file
+                sed -i "s|Rewrite|#Rewrite|g" $APACHE_CONF_DIR/$install_loc_in.conf
+                # re-enable the app in production mode
+                a2enconf -q $install_loc_in
+                systemctl reload apache2
             fi
         else
             # This was a mistake. Exit now to avoid clobbering another app.
@@ -369,10 +407,16 @@ else
     if [[ ! -f "$install_path/db.php" ]]
     then
         cp db.php.template $install_path/db.php
-        sed -i "s/DBNAME/$new_db_name/g" $install_path/db.php
-        sed -i "s/DBUSER/$db_user/g" $install_path/db.php
-        sed -i "s/DBPASS/$db_pass/g" $install_path/db.php
-        sed -i "s/APPNAME/$APP_NAME/g" $install_path/db.php
+        sed -i "s|DBNAME|$new_db_name|g" $install_path/db.php
+        sed -i "s|DBUSER|$db_user|g" $install_path/db.php
+        sed -i "s|DBPASS|$db_pass|g" $install_path/db.php
+        sed -i "s|APPNAME|$APP_NAME|g" $install_path/db.php
+    fi
+    # Create maintenancemode.php if it doesn't exist
+    if [[ ! -f "$install_path/maintenancemode.php" ]]
+    then
+        cp maintenancemode.php $install_path/maintenancemode.php
+        sed -i "s|_APPNAME_|$APP_NAME|g" $install_path/maintenancemode.php
     fi
     
     # copy distribution to install location
@@ -412,15 +456,11 @@ then
 fi
 if [[ "$operation" == "installed" ]]
 then
-    echo "# $APP_NAME default Apache configuration" > $APACHE_CONF_DIR/$base_url.conf
-    echo "" >> $APACHE_CONF_DIR/$base_url.conf
-    echo "Alias /$base_url $doc_root_in/$base_url" >> $APACHE_CONF_DIR/$base_url.conf
-    echo "" >> $APACHE_CONF_DIR/$base_url.conf
-    echo "<Directory $doc_root_in/$base_url>" >> $APACHE_CONF_DIR/$base_url.conf
-    echo "    AllowOverride Options" >> $APACHE_CONF_DIR/$base_url.conf
-    echo "    Options FollowSymLinks" >> $APACHE_CONF_DIR/$base_url.conf
-    echo "    DirectoryIndex index.php" >> $APACHE_CONF_DIR/$base_url.conf
-    echo "</Directory>" >> $APACHE_CONF_DIR/$base_url.conf
+    cp -f default-apache.conf $APACHE_CONF_DIR/$base_url.conf
+    sed -i "s|_APPNAME_|$APP_NAME|g" $APACHE_CONF_DIR/$base_url.conf
+    sed -i "s|_BASEURL_|$base_url|g" $APACHE_CONF_DIR/$base_url.conf
+    sed -i "s|_DOCROOTIN_|$doc_root_in|g" $APACHE_CONF_DIR/$base_url.conf
+    
     echo -n "The apache2 $base_url configuration must be enabled. Would you like to do that now? [Y/n] :"
     read enconf
     if [[ "$enconf" == "" || "$enconf" == "Y" || "$enconf" == "y" ]]