just-mr: Serve endpoint always implies a remote-execution endpoint

As the serve service always has an associated remote-execution
endpoint, when just-mr gets passed only a serve endpoint address it
will now default to implying a remote-execution endpoint exists too
at that address. Additionally, now the implementation of the
--backup-to-remote option more clearly shows that it can only be
done in native mode.

1 files changed, 1 insertions, 9 deletions

diff --git a/src/other_tools/root_maps/fpath_git_map.cpp b/src/other_tools/root_maps/fpath_git_map.cpp
index 7ca438c1..11344de1 100644
--- a/src/other_tools/root_maps/fpath_git_map.cpp
+++ b/src/other_tools/root_maps/fpath_git_map.cpp
@@ -46,17 +46,9 @@ void CheckServeAndSetRoot(
             return;  // fatal
         }
         if (not *has_tree) {
-            if (not remote_api) {
-                (*logger)(fmt::format(
-                              "Missing remote-execution endpoint needed to "
-                              "sync workspace root {} with the serve endpoint.",
-                              tree_id),
-                          /*fatal=*/true);
-                return;
-            }
             if (not EnsureAbsentRootOnServe(tree_id,
                                             repo_root,
-                                            remote_api,
+                                            *remote_api,
                                             logger,
                                             /*no_sync_is_fatal=*/absent)) {
                 return;  // fatal