ci: Add AppImage zsync update (#3965)

.ci/setup-linux.sh

@@ -54,4 +54,8 @@ if [[ "$APPIMAGE_MODE" == "with-appimage" ]]; then
     curl -sLO "https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/latest/download/linuxdeploy-plugin-qt-${ARCH}.AppImage"
     sudo cp -f "linuxdeploy-plugin-qt-${ARCH}.AppImage" "/usr/local/bin/"
     sudo chmod +x "/usr/local/bin/linuxdeploy-plugin-qt-${ARCH}.AppImage"
+
+    curl -sLO "https://github.com/linuxdeploy/linuxdeploy-plugin-appimage/releases/latest/download/linuxdeploy-plugin-appimage-${ARCH}.AppImage"
+    sudo cp -f "linuxdeploy-plugin-appimage-${ARCH}.AppImage" "/usr/local/bin/"
+    sudo chmod +x "/usr/local/bin/linuxdeploy-plugin-appimage-${ARCH}.AppImage"
 fi

appimage/build.sh

@@ -1,5 +1,28 @@
 #!/bin/sh
 
-echo "Executing linuxdeploy with cmdline: LDAI_VERBOSE=1 $@"
+export LDAI_VERBOSE=1
 
-LDAI_VERBOSE=1 $@
+# Try to detect the target architecture from environment or fallback to host
+if [ -n "$ARCH" ]; then
+	DETECTED_ARCH="$ARCH"
+elif [ -n "$CMAKE_APPIMAGE_ARCH" ]; then
+	DETECTED_ARCH="$CMAKE_APPIMAGE_ARCH"
+elif [ -n "$APPIMAGE_ARCH" ]; then
+	DETECTED_ARCH="$APPIMAGE_ARCH"
+else
+	# Fallback to host architecture
+	UNAME_ARCH=$(uname -m)
+	case "$UNAME_ARCH" in
+		x86_64)
+			DETECTED_ARCH="x86_64" ;;
+		aarch64|arm64)
+			DETECTED_ARCH="aarch64" ;;
+		*)
+			DETECTED_ARCH="$UNAME_ARCH" ;;
+	esac
+fi
+
+echo "Detected architecture: $DETECTED_ARCH"
+export LDAI_UPDATE_INFORMATION="gh-releases-zsync|Vita3K|Vita3K|continuous|Vita3K-$(echo "$DETECTED_ARCH").AppImage.zsync"
+
+$@