From 19823c899d42a6c26b89770e01768edcacf3329e Mon Sep 17 00:00:00 2001
From: adisbladis <adisbladis@gmail.com>
Date: Mon, 23 Aug 2021 18:29:04 -0500
Subject: [PATCH] Add full meta to output

While the current output may be sufficient for Hydra it's not enough
for a more generically useful evaluator.
---
 src/hydra-eval-jobs.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/hydra-eval-jobs.cc b/src/hydra-eval-jobs.cc
index bcfecb7..c2fdc23 100644
--- a/src/hydra-eval-jobs.cc
+++ b/src/hydra-eval-jobs.cc
@@ -17,6 +17,8 @@
 #include <nix/derivations.hh>
 #include <nix/local-fs-store.hh>
 
+#include <nix/value-to-json.hh>
+
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/resource.h>
@@ -217,6 +219,16 @@ static void worker(
                 job["maxSilent"] = drv->queryMetaInt("maxSilent", 7200);
                 job["isChannel"] = drv->queryMetaBool("isHydraChannel", false);
 
+                nlohmann::json meta;
+                for (auto & name : drv->queryMetaNames()) {
+                  PathSet context;
+                  std::stringstream ss;
+                  printValueAsJSON(state, true, *drv->queryMeta(name), ss, context);
+                  nlohmann::json field = nlohmann::json::parse(ss.str());
+                  meta[name] = field;
+                }
+                job["meta"] = meta;
+
                 /* If this is an aggregate, then get its constituents. */
                 auto a = v->attrs->get(state.symbols.create("_hydraAggregate"));
                 if (a && state.forceBool(*a->value, *a->pos)) {