Basic Easter Egg framework

functions.sh

@@ -127,7 +127,7 @@ compress_to_chd () {
 validate_for_chd () {
   # Function for validating chd compression candidates, and compresses if validation passes. Supports .cue, .iso and .gdi formats ONLY
   # USAGE: validate_for_chd $input_file
-  
+
 	local file=$1
 	current_run_log_file="chd_compression_"$(date +"%Y_%m_%d_%I_%M_%p").log""
 	echo "Validating file:" $file > "$logs_folder/$current_run_log_file"
@@ -1060,7 +1060,26 @@ create_lock() {
   conf_write
 }
 
+easter_eggs() {
+  today=$(date +"%0m%0d") # Read the current date in a format that can be calculated in ranges
+
+  # Set Easter Egg date or ranges here, in mmdd format
+
+  if [[ today -eq "0401" ]]; then # An example of a one-day easter egg
+    echo "Today is April Fools Day!"
+    # cp -fv /var/config/emulationstation/graphics/splash-aprilfools.svg /var/config/emulationstation/graphics/splash.svg 
+  elif [[ today -ge "1001" && today -le "1031" ]]; then # An example of a multi-day easter egg
+    echo "Today is in the spooky month!"
+    # cp -fv /var/config/emulationstation/graphics/splash-spookytime.svg /var/config/emulationstation/graphics/splash.svg
+  else # Revert to standard splash otherwise
+    echo "Nothing special happening today"
+    # cp -fv /var/config/emulationstation/graphics/splash-orig.svg /var/config/emulationstation/graphics/splash.svg
+  fi
+}
+
 start_retrodeck() {
+  echo "Checking to see if today has a surprise..."
+  easter_eggs
   # normal startup
   echo "Starting RetroDECK v$version"
   emulationstation --home /var/config/emulationstation

net.retrodeck.retrodeck.yml

@@ -1049,9 +1049,12 @@ modules:
       # These must be put in home folder, managed by retrodeck.sh
       - cp es-configs/es_settings.xml ${FLATPAK_DEST}/retrodeck/es_settings.xml
 
-      # Logo, res
-      - rm -f /app/share/emulationstation/resources/graphics/splash.svg
-      - cp -f res/splash.svg /app/share/emulationstation/resources/graphics/splash.svg
+      # Logo, res, move graphics directory to mutable space so splash can be changed after build
+      - mv -f -t /var/config/emulationstation /app/share/emulationstation/resources/graphics 
+      - ln -s /var/config/emulationstation/graphics /app/share/emulationstation/resources/graphics
+      - cp -f res/extra-splashes/* /var/config/emulationstation/graphics
+      - cp -f res/splash.svg /var/config/emulationstation/graphics/splash.svg
+      - cp -f res/splash.svg /var/config/emulationstation/graphics/splash-orig.svg
       - cp -f res/icon.svg /app/share/icons/hicolor/scalable/apps/net.retrodeck.retrodeck.svg
 
       # Tools