From 373ab344925b6fdcb78bed0ccfe0238e9f6d837e Mon Sep 17 00:00:00 2001
From: Daz Wilkin <daz.wilkin@gmail.com>
Date: Fri, 5 May 2023 07:45:28 -0700
Subject: [PATCH] Add dummy package for `runtime/metrics` to that modules that
 depend upon it (e.g. [Prometheus Go client
 library](https://github.com/prometheus/client_golang/blob/main/prometheus/internal/go_runtime_metrics.go))
 will compile.

Avoids:
```console
package runtime/metrics is not in GOROOT
```

Fixes #3705
---
 src/runtime/metrics/metrics.go | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 src/runtime/metrics/metrics.go

diff --git a/src/runtime/metrics/metrics.go b/src/runtime/metrics/metrics.go
new file mode 100644
index 00000000..00108f84
--- /dev/null
+++ b/src/runtime/metrics/metrics.go
@@ -0,0 +1,32 @@
+// Package metrics is a dummy package that is not yet implemented.
+
+package metrics
+
+type Description struct{}
+
+func All() []Description {
+	return nil
+}
+
+type Float64Histogram struct{}
+
+type Sample struct{}
+
+func Read(m []Sample) {}
+
+type Value struct{}
+
+func (v Value) Float64() float64 {
+	return 0
+}
+func (v Value) Float64Histogram() *Float64Histogram {
+	return nil
+}
+func (v Value) Kind() ValueKind {
+	return ValueKind{}
+}
+func (v Value) Uint64() uint64 {
+	return 0
+}
+
+type ValueKind struct{}