Update installer with upgrade option. Resolves #617

installers/common.sh

@@ -30,12 +30,17 @@ git_source_url="https://github.com/$repo"  # $repo from install.raspap.com
 
 # Prompts user to set installation options
 function _config_installation() {
-    _install_log "Configure installation"
+    if [ "$upgrade" == 1 ]; then
+        opt=(Upgrade Upgrading upgrade)
+    else
+        opt=(Install Installing installation)
+    fi
+    _install_log "Configure ${opt[2]}"
     _get_linux_distro
     echo "Detected OS: ${DESC}"
     echo "Using GitHub repository: ${repo} ${branch} branch"
-    echo "Install directory: ${raspap_dir}"
+    echo "Configuration directory: ${raspap_dir}"
-    echo -n "Install to lighttpd root: ${webroot_dir}? [Y/n]: "
+    echo -n "lighttpd root: ${webroot_dir}? [Y/n]: "
     if [ "$assume_yes" == 0 ]; then
         read answer < /dev/tty
         if [ "$answer" != "${answer#[Nn]}" ]; then
@@ -44,8 +49,12 @@ function _config_installation() {
     else
         echo -e
     fi
-    echo "Installing to lighttpd directory: ${webroot_dir}"
+    echo "${opt[1]} lighttpd directory: ${webroot_dir}"
-    echo -n "Complete installation with these values? [Y/n]: "
+    if [ "$upgrade" == 1 ]; then
+        echo "This will upgrade your existing install to version ${RASPAP_LATEST}"
+        echo "Your configuration will NOT be changed"
+    fi
+    echo -n "Complete ${opt[2]} with these values? [Y/n]: "
     if [ "$assume_yes" == 0 ]; then
         read answer < /dev/tty
         if [ "$answer" != "${answer#[Nn]}" ]; then
@@ -290,6 +299,12 @@ function _download_latest_files() {
     git clone --branch $branch --depth 1 $git_source_url /tmp/raspap-webgui || _install_status 1 "Unable to download files from github"
 
     sudo mv /tmp/raspap-webgui $webroot_dir || _install_status 1 "Unable to move raspap-webgui to web root"
+    if [ "$upgrade" == 1 ]; then
+        _install_log "Applying existing configuration to ${webroot_dir}/includes"
+        sudo mv /tmp/config.php $webroot_dir/includes  || _install_status 1 "Unable to move config.php to ${webroot_dir}/includes"
+        sudo mv /tmp/defaults.php $webroot_dir/includes || _install_status 1 "Unable to move defaults.php to ${webroot_dir}/includes"
+    fi
+
     _install_status 0
 }
 
@@ -305,6 +320,12 @@ function _change_file_ownership() {
 
 # Check for existing configuration files
 function _check_for_old_configs() {
+    if [ "$upgrade" == 1 ]; then
+        _install_log "Moving existing configuration to /tmp"
+        sudo mv $webroot_dir/includes/config.php /tmp || _install_status 1 "Unable to move config.php to /tmp"
+        sudo mv $webroot_dir/includes/defaults.php /tmp || _install_status 1 "Unable to move defaults.php to /tmp"
+    else
+        _install_log "Backing up existing configs to ${raspap_dir}/backups"
         if [ -f /etc/network/interfaces ]; then
             sudo cp /etc/network/interfaces "$raspap_dir/backups/interfaces.`date +%F-%R`"
             sudo ln -sf "$raspap_dir/backups/interfaces.`date +%F-%R`" "$raspap_dir/backups/interfaces"
@@ -332,6 +353,7 @@ function _check_for_old_configs() {
                 sudo ln -sf "${raspap_dir}/backups/${filename}.`date +%F-%R`" "${raspap_dir}/backups/${filename}"
             fi
         done
+    fi
     _install_status 0
 }
 
@@ -348,6 +370,7 @@ function _move_config_file() {
 
 # Set up default configuration
 function _default_configuration() {
+    if [ "$upgrade" == 0 ]; then
         _install_log "Applying default configuration to installed services"
         if [ -f /etc/default/hostapd ]; then
             sudo mv /etc/default/hostapd /tmp/default_hostapd.old || _install_status 1 "Unable to remove old /etc/default/hostapd file"
@@ -371,6 +394,7 @@ function _default_configuration() {
             sudo cp "$webroot_dir/config/config.php" "$webroot_dir/includes/config.php"
         fi
         _install_status 0
+    fi
 }
 
 # Install and enable RaspAP daemon
@@ -453,6 +477,7 @@ function _patch_system_files() {
 
 # Optimize configuration of php-cgi.
 function _optimize_php() {
+    if [ "$upgrade" == 0 ]; then
         _install_log "Optimize PHP configuration"
         if [ ! -f "$phpcgiconf" ]; then
             _install_warning "PHP configuration could not be found."
@@ -501,6 +526,7 @@ function _optimize_php() {
                 fi
             fi
         fi
+    fi
 }
 
 function _install_complete() {

installers/raspbian.sh

@@ -20,6 +20,8 @@
 #    Overrides the default git branch (master)
 # -h, --help
 #    Outputs usage notes and exits
+# -u, --upgrade
+#    Upgrades an existing installation to the latest release version
 # -v, --version
 #    Outputs release info and exits
 #
@@ -37,6 +39,7 @@
 repo="billz/raspap-webgui"
 branch="master"
 assume_yes=0
+upgrade=0
 ovpn_option=1
 adblock_option=1
 
@@ -61,6 +64,7 @@ Usage: raspbian.sh [OPTION]\n
 -r, --repo, --repository <name>\n\tOverrides the default GitHub repo (billz/raspap-webgui)
 -b, --branch <name>\n\tOverrides the default git branch (master)
 -h, --help\n\tOutputs usage notes and exits
+-u, --upgrade\n\tUpgrades an existing installation to the latest release version
 -v, --version\n\tOutputs release info and exits\n
 EOF
 )
@@ -95,6 +99,9 @@ while :; do
         printf "$usage"
         exit 1
         ;;
+        -u|--upgrade)
+        upgrade=1
+        ;;
         -v|--version)
         printf "RaspAP v${RASPAP_LATEST} - Simple AP setup & WiFi management for Debian-based devices\n"
         exit 1