task: /boot/config.txt is not an symlink anymore (#600)

* install-photobooth: /boot/config.txt is not an symlink anymore

* remotebuzzer-server: use /boot/firmware/config.txt on sanity check

* remotebuzzer-server: remove unneeded const

install-photobooth.sh

@@ -759,16 +759,10 @@ ask_usb_sync() {
 raspberry_permission() {
     info "### Remote Buzzer Feature"
     info "### Configure Raspberry PI GPIOs for Photobooth - please reboot in order use the Remote Buzzer Feature"
-    BOOT_CONFIG="/boot/config.txt"
-    if [[ -L "$BOOT_CONFIG" ]]; then
-        info "### $BOOT_CONFIG is a symlink."
-        DESTINATION=$(readlink -f "$BOOT_CONFIG")
-        if [ -n "$DESTINATION" ]; then
-            info "### Found symlink of $DESTINATION"
-            BOOT_CONFIG=$DESTINATION
-        else
-            warn "WARN: Unable to determine the destination of $BOOT_CONFIG."
-        fi
+    if [ -f '/boot/firmware/config.txt' ]; then
+        BOOT_CONFIG="/boot/firmware/config.txt"
+    else
+        BOOT_CONFIG="/boot/config.txt"
     fi
     usermod -a -G gpio www-data
     # remove old artifacts from node-rpio library, if there was

src/js/remotebuzzer_server.js

@@ -312,12 +312,16 @@ function gpioSanity(gpioconfig) {
             throw new Error(gpioconfig + ' is not a valid number');
         }
 
-        cmd = 'sed -n "s/^gpio=\\(.*\\)=pu/\\1/p" /boot/config.txt';
+        const configPath = fs.existsSync('/boot/firmware/config.txt')
+            ? '/boot/firmware/config.txt'
+            : '/boot/config.txt';
+
+        cmd = 'sed -n "s/^gpio=\\(.*\\)=pu/\\1/p" ' + configPath;
         stdout = execSync(cmd).toString();
 
         if (!stdout.split(',').find((el) => el == gpioconfig)) {
             throw new Error(
-                'GPIO' + gpioconfig + ' is not configured as PULLUP in /boot/config.txt - see FAQ for details'
+                'GPIO' + gpioconfig + ' is not configured as PULLUP in ' + configPath + ' - see FAQ for details'
             );
         }