Flatpak: build from source instead of repackaging debs (#389)

.github/workflows/flathub.yml

@@ -16,6 +16,21 @@ jobs:
       - name: Checkout app repo
         uses: actions/checkout@v4
 
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+
+      - name: Install source generators
+        run: |
+          pip install flatpak-node-generator tomlkit aiohttp
+          git clone --depth 1 https://github.com/flatpak/flatpak-builder-tools flatpak/flatpak-builder-tools
+
       - name: Run update-manifest.sh
         run: bash flatpak/update-manifest.sh "${{ github.event.release.tag_name }}"
 
@@ -29,6 +44,9 @@ jobs:
       - name: Copy updated files to Flathub repo
         run: |
           cp flatpak/app.yaak.Yaak.yml flathub-repo/
+          cp flatpak/app.yaak.Yaak.metainfo.xml flathub-repo/
+          cp flatpak/cargo-sources.json flathub-repo/
+          cp flatpak/node-sources.json flathub-repo/
           cp LICENSE flathub-repo/
           sed -i 's|path: \.\./LICENSE|path: LICENSE|' flathub-repo/app.yaak.Yaak.yml