Add snapcraft config (#11)

.github/workflows/ci.yaml

@@ -69,6 +69,18 @@ jobs:
       - run: flutter pub get
       - run: flutter build macos -v
 
+  snap:
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: actions/checkout@v3
+    - uses: snapcore/action-build@v1
+      id: snapcraft
+    - uses: actions/upload-artifact@v3
+      if: github.event_name == 'workflow_dispatch'
+      with:
+        name: 'snap'
+        path: ${{steps.snapcraft.outputs.snap}}
+
   test:
     runs-on: ubuntu-22.04
     steps:

assets/calculator.desktop

@@ -0,0 +1,9 @@
+[Desktop Entry]
+Type=Application
+Version=1.0
+Name=Calculator
+Comment=Calculator example
+Keywords=flutter;yaru;example;
+Exec=calculator
+Terminal=false
+Categories=Example;

pubspec.yaml

@@ -1,4 +1,5 @@
 name: calculator
+description: Calculator example
 publish_to: 'none'
 
 environment:
@@ -28,3 +29,5 @@ dev_dependencies:
 flutter:
   generate: true
   uses-material-design: true
+  assets:
+    - assets/

snap/snapcraft.yaml

@@ -0,0 +1,24 @@
+name: calculator
+version: git
+summary: Calculator
+description: Calculator example
+confinement: strict
+base: core22
+grade: stable
+license: GPL-3.0+
+architectures:
+  - build-on: amd64
+    build-for: amd64
+  - build-on: arm64
+    build-for: arm64
+
+parts:
+  calculator:
+    plugin: flutter
+    source: .
+
+apps:
+  calculator:
+    command: calculator
+    desktop: data/flutter_assets/assets/calculator.desktop
+    extensions: [gnome]