build(electron): flatpak support for linux (#8439)

some issues
- app icon not showing correctly
- missing wayland support
- runtime is outdated

related to
- https://github.com/toeverything/AFFiNE/issues/3272
- https://github.com/toeverything/AFFiNE/issues/5985
- https://github.com/toeverything/AFFiNE/issues/6642

.github/workflows/build-test.yml

@@ -567,7 +567,7 @@ jobs:
         if: ${{ matrix.spec.test && matrix.spec.os != 'ubuntu-latest' }}
         run: yarn workspace @affine-test/affine-desktop e2e
 
-      - name: Make bundle
+      - name: Make bundle (macOS)
         if: ${{ matrix.spec.target == 'aarch64-apple-darwin' }}
         env:
           SKIP_BUNDLE: true
@@ -575,8 +575,15 @@ jobs:
           HOIST_NODE_MODULES: 1
         run: yarn workspace @affine/electron package --platform=darwin --arch=arm64
 
-      - name: Make AppImage
-        run: yarn workspace @affine/electron make --platform=linux --arch=x64
+      - name: Make Bundle (Linux)
+        run: |
+          sudo add-apt-repository universe
+          sudo apt install -y libfuse2 elfutils flatpak flatpak-builder
+          flatpak remote-add --user --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+          flatpak update
+          # some flatpak deps need git protocol.file.allow
+          git config --global protocol.file.allow always
+          yarn workspace @affine/electron make --platform=linux --arch=x64
         if: ${{ matrix.spec.target == 'x86_64-unknown-linux-gnu' }}
         env:
           SKIP_WEB_BUILD: 1

.github/workflows/release-desktop.yml

@@ -131,17 +131,22 @@ jobs:
           p12-file-base64: ${{ secrets.CERTIFICATES_P12 }}
           p12-password: ${{ secrets.CERTIFICATES_P12_PASSWORD }}
 
-      - name: Install fuse on Linux (for patching AppImage)
+      - name: Install additional dependencies on Linux
         if: ${{ matrix.spec.platform == 'linux' }}
         run: |
           sudo add-apt-repository universe
-          sudo apt install libfuse2 -y
+          sudo apt install -y libfuse2 elfutils flatpak flatpak-builder
+          flatpak remote-add --user --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+          flatpak update
+          # some flatpak deps need git protocol.file.allow
+          git config --global protocol.file.allow always
 
       - name: make
         run: yarn workspace @affine/electron make --platform=${{ matrix.spec.platform }} --arch=${{ matrix.spec.arch }}
         env:
           SKIP_WEB_BUILD: 1
           HOIST_NODE_MODULES: 1
+          DEBUG: '*'
 
       - name: signing DMG
         if: ${{ matrix.spec.platform == 'darwin' }}
@@ -161,6 +166,8 @@ jobs:
           mv packages/frontend/apps/electron/out/*/make/zip/linux/x64/*.zip ./builds/affine-${{ needs.before-make.outputs.RELEASE_VERSION }}-${{ env.BUILD_TYPE }}-linux-x64.zip
           mv packages/frontend/apps/electron/out/*/make/*.AppImage ./builds/affine-${{ needs.before-make.outputs.RELEASE_VERSION }}-${{ env.BUILD_TYPE }}-linux-x64.appimage
           mv packages/frontend/apps/electron/out/*/make/deb/x64/*.deb ./builds/affine-${{ needs.before-make.outputs.RELEASE_VERSION }}-${{ env.BUILD_TYPE }}-linux-x64.deb
+          mv packages/frontend/apps/electron/out/*/make/flatpak/*/*.flatpak ./builds/affine-${{ needs.before-make.outputs.RELEASE_VERSION }}-${{ env.BUILD_TYPE }}-linux-x64.flatpak
+
       - uses: actions/attest-build-provenance@v1
         if: ${{ matrix.spec.platform == 'darwin' }}
         with:
@@ -412,6 +419,7 @@ jobs:
             ./*.exe
             ./*.appimage
             ./*.deb
+            ./*.flatpak
             ./*.apk
             ./*.yml
       - name: Create Nightly Release Draft
@@ -436,4 +444,5 @@ jobs:
             ./*.appimage
             ./*.deb
             ./*.apk
+            ./*.flatpak
             ./*.yml