* `nix-store --gc --print-roots': also print the path of the actual

root symlink, not just its target.  E.g.:

  /nix/var/nix/profiles/system-99-link -> /nix/store/76kwf88657nq7wgk1hx3l1z5q91zb9wd-system

src/libstore/gc.cc

@@ -614,11 +614,6 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
     if (!options.ignoreLiveness)
         addAdditionalRoots(state.roots);
 
-    if (options.action == GCOptions::gcReturnRoots) {
-        results.paths = state.roots;
-        return;
-    }
-
     /* Read the temporary roots.  This acquires read locks on all
        per-process temporary root files.  So after this point no paths
        can be added to the set of temporary roots. */

src/libstore/store-api.hh

@@ -22,10 +22,6 @@ struct GCOptions
 {
     /* Garbage collector operation:
 
-       - `gcReturnRoots': find and return the set of roots for the
-         garbage collector.  These are the store paths symlinked to in
-         the `gcroots' directory.
-
        - `gcReturnLive': return the set of paths reachable from
          (i.e. in the closure of) the roots.
 
@@ -38,7 +34,6 @@ struct GCOptions
           `pathsToDelete', insofar as they are not reachable.
     */
     typedef enum {
-        gcReturnRoots,
         gcReturnLive,
         gcReturnDead,
         gcDeleteDead,