feat: add keep versions parsing

entrypoint.sh

@@ -33,8 +33,22 @@ resolve_token() {
   return 1
 }
 
+resolve_keep_versions() {
+  local raw_value="${INPUT_KEEP_VERSIONS:-2}"
+
+  if [[ -z "${raw_value}" ]]; then
+    raw_value="2"
+  fi
+
+  if [[ ! "${raw_value}" =~ ^[0-9]+$ ]]; then
+    fail "Invalid keep_versions: ${raw_value}"
+  fi
+
+  printf '%s' "${raw_value}"
+}
+
 main() {
-  local token
+  local token keep_versions
 
   log "Gitea Server Url: ${GITEA_SERVER_URL:-}"
   log "Gitea Repository: ${GITEA_REPOSITORY:-}"
@@ -44,8 +58,10 @@ main() {
   fi
 
   export RESOLVED_GITEA_TOKEN="$token"
+  keep_versions="$(resolve_keep_versions)"
+  log "keep_versions=${keep_versions}"
   log "Token source resolved successfully"
-  log "Stage 1 complete"
+  log "Stage 2 complete"
 }
 
 main "$@"