From 12b30c920dd15287a7b295475ce1cc4a6cb1f43f Mon Sep 17 00:00:00 2001
From: Chris Lumens <clumens@redhat.com>
Date: Tue, 8 Dec 2020 15:48:38 -0500
Subject: [PATCH] Fix: scheduler: Don't output a resource header with no list.

If there's no resources to print, don't output just the header with
nothing under it.  This potentially comes up if there are only inactive
resources, but inactive_resources is FALSE.
---
 lib/pengine/pe_output.c | 48 ++++++++++++++++++++++++++++++++++++------------
 1 file changed, 36 insertions(+), 12 deletions(-)

diff --git a/lib/pengine/pe_output.c b/lib/pengine/pe_output.c
index 5562eb6..f1a6b43 100644
--- a/lib/pengine/pe_output.c
+++ b/lib/pengine/pe_output.c
@@ -1761,6 +1761,21 @@ resource_history_xml(pcmk__output_t *out, va_list args) {
     return pcmk_rc_ok;
 }
 
+static void
+print_resource_header(pcmk__output_t *out, gboolean group_by_node,
+                      gboolean inactive_resources)
+{
+    if (group_by_node) {
+        /* Active resources have already been printed by node */
+        out->begin_list(out, NULL, NULL, "Inactive Resources");
+    } else if (inactive_resources) {
+        out->begin_list(out, NULL, NULL, "Full List of Resources");
+    } else {
+        out->begin_list(out, NULL, NULL, "Active Resources");
+    }
+}
+
+
 PCMK__OUTPUT_ARGS("resource-list", "pe_working_set_t *", "unsigned int", "gboolean",
                   "gboolean", "gboolean", "gboolean", "GList *", "GList *", "gboolean")
 static int
@@ -1778,6 +1793,7 @@ resource_list(pcmk__output_t *out, va_list args)
 
     GList *rsc_iter;
     int rc = pcmk_rc_no_output;
+    bool printed_header = false;
 
     /* If we already showed active resources by node, and
      * we're not showing inactive resources, we have nothing to do
@@ -1786,22 +1802,15 @@ resource_list(pcmk__output_t *out, va_list args)
         return rc;
     }
 
-    PCMK__OUTPUT_SPACER_IF(out, print_spacer);
-
-    if (group_by_node) {
-        /* Active resources have already been printed by node */
-        out->begin_list(out, NULL, NULL, "Inactive Resources");
-    } else if (inactive_resources) {
-        out->begin_list(out, NULL, NULL, "Full List of Resources");
-    } else {
-        out->begin_list(out, NULL, NULL, "Active Resources");
-    }
-
     /* If we haven't already printed resources grouped by node,
      * and brief output was requested, print resource summary */
     if (brief_output && !group_by_node) {
         GList *rscs = pe__filter_rsc_list(data_set->resources, only_rsc);
 
+        PCMK__OUTPUT_SPACER_IF(out, print_spacer);
+        print_resource_header(out, group_by_node, inactive_resources);
+        printed_header = true;
+
         pe__rscs_brief_output(out, rscs, print_opts, inactive_resources);
         g_list_free(rscs);
     }
@@ -1839,6 +1848,12 @@ resource_list(pcmk__output_t *out, va_list args)
             continue;
         }
 
+        if (!printed_header) {
+            PCMK__OUTPUT_SPACER_IF(out, print_spacer);
+            print_resource_header(out, group_by_node, inactive_resources);
+            printed_header = true;
+        }
+
         /* Print this resource */
         x = out->message(out, crm_map_element_name(rsc->xml), print_opts, rsc,
                          only_node, only_rsc);
@@ -1848,6 +1863,12 @@ resource_list(pcmk__output_t *out, va_list args)
     }
 
     if (print_summary && rc != pcmk_rc_ok) {
+        if (!printed_header) {
+            PCMK__OUTPUT_SPACER_IF(out, print_spacer);
+            print_resource_header(out, group_by_node, inactive_resources);
+            printed_header = true;
+        }
+
         if (group_by_node) {
             out->list_item(out, NULL, "No inactive resources");
         } else if (inactive_resources) {
@@ -1857,7 +1878,10 @@ resource_list(pcmk__output_t *out, va_list args)
         }
     }
 
-    out->end_list(out);
+    if (printed_header) {
+        out->end_list(out);
+    }
+
     return rc;
 }
 
-- 
1.8.3.1