status: Pass correct remote name when verifying

The default `ostree admin status` tries to do signature
verification, but doesn't error out if that fails.

However, an extremely longstanding bug here is that we passed
the "osname" aka stateroot instead of the remote name.  This
happens to work for e.g. Fedora Silverblue today, where they
are the same.  It doesn't work on FCOS (remote = fedora, stateroot = fedora-coreos).

src/ostree/ot-admin-builtin-status.c

@@ -33,35 +33,6 @@ static gboolean opt_verify;
 static GOptionEntry options[] = { { "verify", 'V', 0, G_OPTION_ARG_NONE, &opt_verify,
                                     "Print the commit verification status", NULL },
                                   { NULL } };
-
-#ifndef OSTREE_DISABLE_GPGME
-static gboolean
-deployment_get_gpg_verify (OstreeDeployment *deployment, OstreeRepo *repo)
-{
-  /* XXX Something like this could be added to the OstreeDeployment
-   *     API in libostree if the OstreeRepo parameter is acceptable. */
-  GKeyFile *origin = ostree_deployment_get_origin (deployment);
-
-  if (origin == NULL)
-    return FALSE;
-
-  g_autofree char *refspec = g_key_file_get_string (origin, "origin", "refspec", NULL);
-
-  if (refspec == NULL)
-    return FALSE;
-
-  g_autofree char *remote = NULL;
-  if (!ostree_parse_refspec (refspec, &remote, NULL, NULL))
-    return FALSE;
-
-  gboolean gpg_verify = FALSE;
-  if (remote)
-    (void)ostree_repo_remote_get_gpg_verify (repo, remote, &gpg_verify, NULL);
-
-  return gpg_verify;
-}
-#endif /* OSTREE_DISABLE_GPGME */
-
 static gboolean
 deployment_print_status (OstreeSysroot *sysroot, OstreeRepo *repo, OstreeDeployment *deployment,
                          gboolean is_booted, gboolean is_pending, gboolean is_rollback,
@@ -95,6 +66,8 @@ deployment_print_status (OstreeSysroot *sysroot, OstreeRepo *repo, OstreeDeploym
     }
 
   GKeyFile *origin = ostree_deployment_get_origin (deployment);
+  g_autofree char *origin_refspec
+      = origin ? g_key_file_get_string (origin, "origin", "refspec", NULL) : NULL;
 
   const char *deployment_status = "";
   if (ostree_deployment_is_finalization_locked (deployment))
@@ -127,7 +100,6 @@ deployment_print_status (OstreeSysroot *sysroot, OstreeRepo *repo, OstreeDeploym
     g_print ("    origin: none\n");
   else
     {
-      g_autofree char *origin_refspec = g_key_file_get_string (origin, "origin", "refspec", NULL);
       if (!origin_refspec)
         g_print ("    origin: <unknown origin type>\n");
       else
@@ -137,15 +109,22 @@ deployment_print_status (OstreeSysroot *sysroot, OstreeRepo *repo, OstreeDeploym
     }
 
 #ifndef OSTREE_DISABLE_GPGME
-  if (!opt_verify && deployment_get_gpg_verify (deployment, repo))
+  g_autofree char *remote = NULL;
+  if (origin_refspec && !ostree_parse_refspec (origin_refspec, &remote, NULL, NULL))
+    return FALSE;
+
+  gboolean gpg_verify = FALSE;
+  if (remote)
+    (void)ostree_repo_remote_get_gpg_verify (repo, remote, &gpg_verify, NULL);
+  if (!opt_verify && gpg_verify)
     {
+      g_assert (remote);
       g_autoptr (GString) output_buffer = g_string_sized_new (256);
       /* Print any digital signatures on this commit. */
 
-      const char *osname = ostree_deployment_get_osname (deployment);
       g_autoptr (GError) local_error = NULL;
       g_autoptr (OstreeGpgVerifyResult) result
-          = ostree_repo_verify_commit_for_remote (repo, ref, osname, cancellable, &local_error);
+          = ostree_repo_verify_commit_for_remote (repo, ref, remote, cancellable, &local_error);
 
       /* G_IO_ERROR_NOT_FOUND just means the commit is not signed. */
       if (g_error_matches (local_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
@@ -174,16 +153,8 @@ deployment_print_status (OstreeSysroot *sysroot, OstreeRepo *repo, OstreeDeploym
     {
       if (!commit)
         return glnx_throw (error, "Cannot verify, failed to load commit");
-
-      if (origin == NULL)
-        return glnx_throw (error, "Cannot verify deployment with no origin");
-
-      g_autofree char *refspec = g_key_file_get_string (origin, "origin", "refspec", NULL);
-      if (refspec == NULL)
+      if (origin_refspec == NULL)
         return glnx_throw (error, "No origin/refspec, cannot verify");
-      g_autofree char *remote = NULL;
-      if (!ostree_parse_refspec (refspec, &remote, NULL, NULL))
-        return FALSE;
       if (remote == NULL)
         return glnx_throw (error, "Cannot verify deployment without remote");