ci: add linux build script

.github/workflows/linux_build.yml

@@ -0,0 +1,94 @@
+name: Linux build
+
+on:
+  workflow_dispatch:
+
+env:
+  FLUTTER_VERSION: "3.13.2"
+  APK_BUILD_DIR: "/tmp/build"
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    outputs:
+      version: ${{ steps.get_version.outputs.version }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Get version from pubspec.yaml
+        id: get_version
+        run: |
+          VERSION=$(sed -n 's/^version: \([0-9]*\.[0-9]*\.[0-9]*\).*/\1/p' pubspec.yaml)
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: ${{ env.FLUTTER_VERSION }}
+          channel: "stable"
+
+      - name: Dependencies
+        run: flutter pub get
+
+      - name: Build generated files
+        run: flutter pub run build_runner build -d
+
+      - name: Upload updated lib files with generated code
+        uses: actions/upload-artifact@v3
+        with:
+          name: lib-files
+          path: ./lib/*
+
+  build_appimage:
+    needs: build
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Download generated files
+        uses: actions/download-artifact@v3
+        with:
+          name: lib-files
+          path: lib
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y clang cmake libgtk-3-dev ninja-build libayatana-appindicator3-dev libfuse2
+
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: ${{ env.FLUTTER_VERSION }}
+          channel: "stable"
+
+      - name: Dependencies
+        run: flutter pub get
+
+      - name: Compile linux
+        run: flutter build linux
+
+      - name: Copy compiled linux files
+        run: |
+          mkdir AppDir
+          cp -r build/linux/x64/release/bundle/* AppDir/
+
+      - name: Copy logo to AppDir
+        run: |
+          mkdir -p AppDir/usr/share/icons/hicolor/32x32/apps
+          cp assets/img/logo-32.png AppDir/usr/share/icons/hicolor/32x32/apps/localsend.png
+          mkdir -p AppDir/usr/share/icons/hicolor/128x128/apps
+          cp assets/img/logo-128.png AppDir/usr/share/icons/hicolor/128x128/apps/localsend.png
+          mkdir -p AppDir/usr/share/icons/hicolor/256x256/apps
+          cp assets/img/logo-256.png AppDir/usr/share/icons/hicolor/256x256/apps/localsend.png
+
+      - name: Build AppImage
+        uses: AppImageCrafters/build-appimage@57c3bc6963f870ce3be103117de5b5e33ffbaeb6
+        with:
+          recipe: ./AppImageBuilder.yml
+
+      - name: Upload AppImage file
+        uses: actions/upload-artifact@v3
+        with:
+          name: appimage-result
+          path: ./*.AppImage