Update snap to core22 (#55)

Author: Futsch1

snap/snapcraft.yaml

@@ -1,6 +1,6 @@
 name: image-sieve 
 title: ImageSieve
-base: core20 
+base: core22 
 summary: Tool to sort out images and archive them in a target folder 
 description: |
   ImageSieve aims to help in the process of sorting through images taken by several 
@@ -18,24 +18,32 @@ icon: snap/gui/ImageSieve.png
 apps:
   image-sieve:
     command: bin/image_sieve
-    extensions: [gnome-3-38]
+    extensions: [gnome]
     plugs:
       - home
       - removable-media
       - network
 
 parts:
+  install-rust:
+    plugin: nil
+    override-build: |
+      if ! command -v rustup 2>/dev/null; then
+        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --no-modify-path --profile=minimal
+        export PATH="${HOME}/.cargo/bin:${PATH}"
+      fi
   image-sieve:
     plugin: rust
+    after: [install-rust]
     source: .
     override-pull: |
-      snapcraftctl pull
+      craftctl default
       ver=""
       ver=$(git describe --tags --abbrev=0 | sed 's/v//') || true
       if [ -z $ver ]
       then ver="0.0.0" 
       fi
-      snapcraftctl set-version $ver
+      craftctl set version=$ver
     build-packages:
       - cmake
       - git
@@ -49,6 +57,8 @@ parts:
       - libavutil-dev
       - libswscale-dev
       - libclang-dev
+      - rustc
+      - cargo
 
   deps:
     plugin: nil