ci: attach release AAB to Gitea release assets

.gitea/workflows/android-build.yml

@@ -1,5 +1,9 @@
 name: Android build
 
+permissions:
+  contents: read
+  releases: write
+
 on:
   push:
     branches:
@@ -82,10 +86,17 @@ jobs:
           path: app/build/outputs/apk/debug/*.apk
           if-no-files-found: error
 
-      - name: Upload release AAB
+      - name: Attach release AAB to Gitea release
         if: github.event_name == 'release'
-        uses: actions/upload-artifact@v3
-        with:
-          name: release-aab
-          path: app/build/outputs/bundle/release/*.aab
-          if-no-files-found: error
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+        shell: bash
+        run: |
+          set -euxo pipefail
+          release_id="$(python3 -c 'import json, os; print(json.load(open(os.environ["GITHUB_EVENT_PATH"], encoding="utf-8"))["release"]["id"])')"
+          aab="$(find app/build/outputs/bundle/release -name '*.aab' | head -n 1)"
+          curl --fail-with-body \
+            --request POST \
+            --header "Authorization: token ${GITEA_TOKEN}" \
+            --form "attachment=@${aab}" \
+            "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/releases/${release_id}/assets?name=$(basename "$aab")"