ci: add Gitea release workflow

.gitea/workflows/release.yml

@@ -0,0 +1,67 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fetch RELEASE_NOTES.md only
+        uses: actions/checkout@v4
+        with:
+          sparse-checkout: RELEASE_NOTES.md
+          sparse-checkout-cone-mode: false
+
+      - name: Create Gitea release
+        env:
+          DEPLOY_TOKEN: ${{ secrets.DEPLOY_TOKEN }}
+        run: |
+          TAG="${{ gitea.ref_name }}"
+          VERSION="${TAG#v}"
+          BASE_URL="${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}"
+
+          # Detect pre-release (alpha/beta/rc)
+          IS_PRE="false"
+          if echo "$TAG" | grep -qE '(alpha|beta|rc)'; then
+            IS_PRE="true"
+          fi
+
+          # Read release notes if present
+          if [ -f RELEASE_NOTES.md ]; then
+            export RELEASE_NOTES=$(cat RELEASE_NOTES.md)
+            echo "Found RELEASE_NOTES.md"
+          else
+            export RELEASE_NOTES=""
+            echo "No RELEASE_NOTES.md found"
+          fi
+
+          BODY_JSON=$(python3 -c "
+          import json, os
+          notes = os.environ.get('RELEASE_NOTES', '')
+          print(json.dumps(notes.strip()))
+          ")
+
+          # Create release via Gitea API
+          RELEASE=$(curl -s -X POST "$BASE_URL/releases" \
+            -H "Authorization: token $DEPLOY_TOKEN" \
+            -H "Content-Type: application/json" \
+            -d "{
+              \"tag_name\": \"$TAG\",
+              \"name\": \"$VERSION\",
+              \"body\": $BODY_JSON,
+              \"draft\": false,
+              \"prerelease\": $IS_PRE
+            }")
+
+          # Fallback: if release already exists for this tag, reuse it
+          RELEASE_ID=$(echo "$RELEASE" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])" 2>/dev/null)
+          if [ -z "$RELEASE_ID" ]; then
+            echo "::warning::Release already exists for tag $TAG — reusing existing release"
+            RELEASE=$(curl -s "$BASE_URL/releases/tags/$TAG" \
+              -H "Authorization: token $DEPLOY_TOKEN")
+            RELEASE_ID=$(echo "$RELEASE" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")
+          fi
+          echo "Created release $RELEASE_ID for $TAG"