chore: setup openapi contract gate [AC-INIT]

.gitea/workflows/pr-check.yaml

@@ -18,17 +18,30 @@ jobs:
         run: |
           set -eu
 
-          # Expect Gitea-provided env vars in the runner
-          : "${GITEA_SERVER_URL:?GITEA_SERVER_URL is required}"
-          : "${GITEA_REPOSITORY:?GITEA_REPOSITORY is required}"
-          : "${GITEA_SHA:?GITEA_SHA is required}"
+          # Try GITHUB_ vars first (Gitea usually provides these for compatibility)
+          # Fallback to GITEA_ vars if GITHUB_ ones are empty
+          SERVER_URL="${GITHUB_SERVER_URL:-${GITEA_SERVER_URL:-}}"
+          REPO_NAME="${GITHUB_REPOSITORY:-${GITEA_REPOSITORY:-}}"
+          COMMIT_SHA="${GITHUB_SHA:-${GITEA_SHA:-}}"
 
-          echo "GITEA_SERVER_URL=$GITEA_SERVER_URL"
-          echo "GITEA_REPOSITORY=$GITEA_REPOSITORY"
-          echo "GITEA_SHA=$GITEA_SHA"
+          # If still empty, try to detect from environment
+          if [ -z "$SERVER_URL" ] || [ -z "$REPO_NAME" ] || [ -z "$COMMIT_SHA" ]; then
+            echo "Warning: Some standard env vars are missing. Printing environment for debugging (excluding secrets)..."
+            env | grep -E "GITEA|GITHUB|CI" | sort
+          fi
 
-          git clone "$GITEA_SERVER_URL/$GITEA_REPOSITORY.git" .
-          git checkout "$GITEA_SHA"
+          # Final validation
+          : "${SERVER_URL:?Could not determine SERVER_URL}"
+          : "${REPO_NAME:?Could not determine REPO_NAME}"
+          : "${COMMIT_SHA:?Could not determine COMMIT_SHA}"
+
+          echo "Using SERVER_URL=$SERVER_URL"
+          echo "Using REPO_NAME=$REPO_NAME"
+          echo "Using COMMIT_SHA=$COMMIT_SHA"
+
+          # Clone using the determined URL (assuming no auth required for internal runner or handled by runner)
+          git clone "$SERVER_URL/$REPO_NAME.git" .
+          git checkout "$COMMIT_SHA"
 
       - name: Run OpenAPI Contract Level Check
         env: