das ist krank und ich kann es nicht validieren

.github/actions/bump-version/action.yaml

@@ -6,7 +6,7 @@ inputs:
     required: false
     default: "24"
   release_line:
-    description: Release line for dev builds (e.g. 2.4) when it cannot be derived from the branch or PR target
+    description: Release line for dev builds (e.g. 2.4 or 2.4.1) when it cannot be derived from the branch or PR target
     required: false
     default: ""
   gitea_token:
@@ -68,49 +68,103 @@ runs:
           node -p "require('./package.json').version"
         }
 
-        validate_release_line() {
-          local line="$1"
-          [[ "${line}" =~ ^[0-9]+\.[0-9]+$ ]]
-        }
-
-        extract_release_line() {
-          local ref_name="$1"
-          if [[ "${ref_name}" =~ ^release/v?([0-9]+)\.([0-9]+)$ ]]; then
-            echo "${BASH_REMATCH[1]}.${BASH_REMATCH[2]}"
+        normalize_release_base() {
+          local value="$1"
+          if [[ "${value}" =~ ^v?([0-9]+)\.([0-9]+)$ ]]; then
+            echo "${BASH_REMATCH[1]}.${BASH_REMATCH[2]}.0"
+            return 0
+          fi
+          if [[ "${value}" =~ ^v?([0-9]+)\.([0-9]+)\.([0-9]+)$ ]]; then
+            echo "${BASH_REMATCH[1]}.${BASH_REMATCH[2]}.${BASH_REMATCH[3]}"
             return 0
           fi
           return 1
         }
 
-        resolve_release_line() {
+        extract_release_base() {
+          local ref_name="$1"
+          local normalized
+          if [[ "${ref_name}" =~ ^release/(.+)$ ]]; then
+            if normalized="$(normalize_release_base "${BASH_REMATCH[1]}")"; then
+              echo "${normalized}"
+              return 0
+            fi
+          fi
+          return 1
+        }
+
+        infer_release_base_from_ancestor_release_branch() {
+          local best_release_base=""
+          local best_commit_time=0
+          local remote_ref
+          local release_branch
+          local release_base
+          local commit_time
+
+          # Best effort: not every repository has release branches.
+          git fetch --no-tags origin "+refs/heads/release/*:refs/remotes/origin/release/*" >/dev/null 2>&1 || true
+
+          while IFS= read -r remote_ref; do
+            release_branch="${remote_ref#origin/}"
+            if ! release_base="$(extract_release_base "${release_branch}")"; then
+              continue
+            fi
+
+            if ! git merge-base --is-ancestor "$(git rev-parse "${remote_ref}")" HEAD; then
+              continue
+            fi
+
+            commit_time="$(git show -s --format=%ct "${remote_ref}")"
+            if [[ "${commit_time}" -gt "${best_commit_time}" ]]; then
+              best_commit_time="${commit_time}"
+              best_release_base="${release_base}"
+            fi
+          done < <(git for-each-ref --format='%(refname:short)' refs/remotes/origin/release/*)
+
+          if [[ -n "${best_release_base}" ]]; then
+            echo "${best_release_base}"
+            return 0
+          fi
+
+          return 1
+        }
+
+        resolve_release_base() {
           local package_version
+          local normalized
+          local inferred_release_base
 
           if [[ -n "${INPUT_RELEASE_LINE}" ]]; then
-            if ! validate_release_line "${INPUT_RELEASE_LINE}"; then
-              echo "Invalid release_line input '${INPUT_RELEASE_LINE}'. Expected format: <major>.<minor>" >&2
+            if ! normalized="$(normalize_release_base "${INPUT_RELEASE_LINE}")"; then
+              echo "Invalid release_line input '${INPUT_RELEASE_LINE}'. Expected format: <major>.<minor> or <major>.<minor>.<patch>" >&2
               exit 1
             fi
-            echo "${INPUT_RELEASE_LINE}"
+            echo "${normalized}"
             return 0
           fi
 
-          if extract_release_line "${BRANCH}" >/dev/null; then
-            extract_release_line "${BRANCH}"
+          if extract_release_base "${BRANCH}" >/dev/null; then
+            extract_release_base "${BRANCH}"
             return 0
           fi
 
-          if [[ -n "${BASE_BRANCH}" ]] && extract_release_line "${BASE_BRANCH}" >/dev/null; then
-            extract_release_line "${BASE_BRANCH}"
+          if [[ -n "${BASE_BRANCH}" ]] && extract_release_base "${BASE_BRANCH}" >/dev/null; then
+            extract_release_base "${BASE_BRANCH}"
+            return 0
+          fi
+
+          if inferred_release_base="$(infer_release_base_from_ancestor_release_branch)"; then
+            echo "${inferred_release_base}"
             return 0
           fi
 
           package_version="$(read_package_version)"
           if [[ "${package_version}" =~ ^([0-9]+)\.([0-9]+)\.[0-9]+([-.].*)?$ ]]; then
-            echo "${BASH_REMATCH[1]}.${BASH_REMATCH[2]}"
+            echo "${BASH_REMATCH[1]}.${BASH_REMATCH[2]}.0"
             return 0
           fi
 
-          echo "Unable to determine release line for branch '${BRANCH}'. Use release/<major>.<minor>, provide inputs.release_line, or ensure package.json contains a semantic version." >&2
+          echo "Unable to determine release base for branch '${BRANCH}'. Use release/<major>.<minor>[.<patch>], provide inputs.release_line, or ensure package.json contains a semantic version." >&2
           exit 1
         }
 
@@ -164,13 +218,11 @@ runs:
             fi
             ;;
           release/*)
-            RELEASE_LINE="$(resolve_release_line)"
-            RELEASE_BASE="${RELEASE_LINE}.0"
+            RELEASE_BASE="$(resolve_release_base)"
             set_version "$(next_beta_version "${RELEASE_BASE}")"
             ;;
           *)
-            RELEASE_LINE="$(resolve_release_line)"
-            RELEASE_BASE="${RELEASE_LINE}.0"
+            RELEASE_BASE="$(resolve_release_base)"
             set_version "$(next_dev_version "${RELEASE_BASE}")"
             ;;
         esac