From 33a935e8ef44e07c709328235ed48c4b4de03483 Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Tue, 8 Apr 2025 17:38:19 -0400
Subject: [PATCH] Queue-runner: Always produce a machines JSON object

Even if there are no machines, there should at least be an empty object.
---
 src/hydra-queue-runner/hydra-queue-runner.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/hydra-queue-runner/hydra-queue-runner.cc b/src/hydra-queue-runner/hydra-queue-runner.cc
index adc903d8..05d7e263 100644
--- a/src/hydra-queue-runner/hydra-queue-runner.cc
+++ b/src/hydra-queue-runner/hydra-queue-runner.cc
@@ -615,6 +615,7 @@ void State::dumpStatus(Connection & conn)
         }
 
         {
+            auto machines_json = json::object();
             auto machines_(machines.lock());
             for (auto & i : *machines_) {
                 auto & m(i.second);
@@ -641,8 +642,9 @@ void State::dumpStatus(Connection & conn)
                     machine["avgStepTime"] = (float) s->totalStepTime / s->nrStepsDone;
                     machine["avgStepBuildTime"] = (float) s->totalStepBuildTime / s->nrStepsDone;
                 }
-                statusJson["machines"][m->storeUri.render()] = machine;
+                machines_json[m->storeUri.render()] = machine;
             }
+            statusJson["machines"] = machines_json;
         }
 
         {