chore(snap): Updated the Snapcraft build scripts.

Author: Skyost

snap/snapcraft.yaml

@@ -46,26 +46,24 @@ parts:
     plugin: flutter
     flutter-target: lib/main.dart
     override-build: |
+      flutter_dir="$CRAFT_PART_BUILD/flutter-distro"
+
+      if [ ! -d "$flutter_dir" ]; then
+        git clone --depth 1 -b stable https://github.com/flutter/flutter.git "$flutter_dir"
+        rm -f "$flutter_dir/engine/src/.gn"
+      fi
+
+      export PATH="$flutter_dir/bin:$PATH"
+
+      flutter precache --linux
       flutter pub get
       dart run open_authenticator:compile_svg
       dart run build_runner build --delete-conflicting-outputs
       dart run slang
       dart run open_authenticator:generate
+      flutter build linux --release --verbose --target lib/main.dart
 
-      if command -v craftctl >/dev/null 2>&1; then
-        craftctl default
-      elif command -v snapcraftctl >/dev/null 2>&1; then
-        snapcraftctl build
-      elif [ -x /usr/libexec/snapcraft/craftctl ]; then
-        /usr/libexec/snapcraft/craftctl default
-      elif [ -x /usr/libexec/snapcraft/snapcraftctl ]; then
-        /usr/libexec/snapcraft/snapcraftctl build
-      elif [ -x /usr/bin/scriptlet-bin/snapcraftctl ]; then
-        /usr/bin/scriptlet-bin/snapcraftctl build
-      else
-        echo "Could not find craftctl or snapcraftctl." >&2
-        exit 1
-      fi
+      cp -r build/linux/*/release/bundle/* "$CRAFT_PART_INSTALL/"
     build-packages:
       - default-jdk-headless
       - libcurl4-openssl-dev