Basic changelog dialog shown at update

functions.sh

@@ -2288,3 +2288,15 @@ configurator_move_folder_dialog() {
     configurator_move_folder_dialog "$rd_dir_name"
   fi
 }
+
+changelog_dialog() {
+  # This function will pull the changelog notes from the version it is passed (which must match the appdata version tag) from the net.retrodeck.retrodeck.appdata.xml file
+  # USAGE: changelog_dialog "version"
+
+  changelog=$(xmlstarlet sel -t -m "//release[@version='$1']/description" -v . -n $rd_appdata | tr -s '\n' | sed 's/^\s*//')
+
+  zenity --icon-name=net.retrodeck.retrodeck --info --no-wrap \
+  --window-icon="/app/share/icons/hicolor/scalable/apps/net.retrodeck.retrodeck.svg" \
+  --title "RetroDECK Changelogs" \
+  --text="Welcome to RetroDECK version $1!\n\nHere are the changes that were made in this version:\n$changelog"
+}

global.sh

@@ -30,6 +30,7 @@ es_themes_list="https://gitlab.com/es-de/themes/themes-list/-/raw/master/themes.
 remote_network_target="https://one.one.one.one"                                                                       # The URL of a common internet target for testing network access
 helper_files_folder="$emuconfigs/defaults/retrodeck/helper_files"                                                     # The parent folder of RetroDECK documentation files for deployment
 helper_files_list="$emuconfigs/defaults/retrodeck/reference_lists/helper_files_list.cfg"                              # The list of files to be deployed and where they go
+rd_appdata="/app/share/appdata/net.retrodeck.retrodeck.appdata.xml"                                                   # The shipped appdata XML file for this version
 rpcs3_firmware="http://dus01.ps3.update.playstation.net/update/ps3/image/us/2023_0228_05fe32f5dc8c78acbcd84d36ee7fdc5b/PS3UPDAT.PUP"
 
 # Options list for users to pick from during finit

post_update.sh

@@ -132,5 +132,7 @@ post_update() {
   --window-icon="/app/share/icons/hicolor/scalable/apps/net.retrodeck.retrodeck.svg" \
   --title "RetroDECK Finishing Upgrade" \
   --text="RetroDECK is finishing the upgrade process, please wait."
+  
+  changelog_dialog "$version"
   create_lock
 }