build: add gitea api url fallback

.gitea/workflows/build.yml

@@ -59,6 +59,8 @@ jobs:
         env:
           GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
           GITEA_API: ${{ vars.GITEA_API_URL }}
+          GITEA_SERVER_URL: ${{ vars.GITEA_SERVER_URL }}
+          GITHUB_SERVER_URL: ${{ github.server_url }}
         run: |
           TAG=$(git describe --tags --exact-match 2>/dev/null || true)
           if [ -z "$TAG" ]; then
@@ -66,8 +68,14 @@ jobs:
             exit 0
           fi
           if [ -z "$GITEA_API" ]; then
-            echo "GITEA_API_URL is not set in repo variables."
+            if [ -n "$GITEA_SERVER_URL" ]; then
-            exit 1
+              GITEA_API="${GITEA_SERVER_URL}/api/v1"
+            elif [ -n "$GITHUB_SERVER_URL" ]; then
+              GITEA_API="${GITHUB_SERVER_URL}/api/v1"
+            else
+              echo "GITEA_API_URL is not set and server URL is unavailable."
+              exit 1
+            fi
           fi
           VERSION=${TAG#v}
           JAR_PATH=$(ls build/libs/*.jar | head -n 1)

README.md

@@ -73,6 +73,7 @@ The Gitea workflow expects these secrets/variables:
 
 - `GITEA_TOKEN`: built-in Actions token with repo write access for tags/releases.
 - `GITEA_API_URL`: API base URL, for example `https://git.garvis.dev/api/v1`.
+- Optional fallback: `GITEA_SERVER_URL` or the runner `GITHUB_SERVER_URL` are used if the API URL is not set.
 
 ## Metrics