From 6af081ad335ae73b41217d2c5b3bdf0acc30aaa5 Mon Sep 17 00:00:00 2001
From: peter woodman <peter@shortbus.org>
Date: Thu, 24 Mar 2022 12:24:40 -0400
Subject: [PATCH] prometheus-node-exporter: fix build on darwin (#165546)

---
 .../monitoring/prometheus/node-exporter.nix     | 12 +++++++++++-
 .../node-exporter/node-exporter-darwin.patch    | 17 +++++++++++++++++
 pkgs/top-level/all-packages.nix                 |  4 +++-
 3 files changed, 31 insertions(+), 2 deletions(-)
 create mode 100644 pkgs/servers/monitoring/prometheus/node-exporter/node-exporter-darwin.patch

diff --git a/pkgs/servers/monitoring/prometheus/node-exporter.nix b/pkgs/servers/monitoring/prometheus/node-exporter.nix
index 7d40e919773d..0da2bb604a0b 100644
--- a/pkgs/servers/monitoring/prometheus/node-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/node-exporter.nix
@@ -1,4 +1,7 @@
-{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests
+  # darwin
+  , CoreFoundation, IOKit
+}:
 
 buildGoModule rec {
   pname = "node_exporter";
@@ -17,6 +20,13 @@ buildGoModule rec {
   # FIXME: tests fail due to read-only nix store
   doCheck = false;
 
+  buildInputs = lib.optionals stdenv.isDarwin [ CoreFoundation IOKit ];
+  # upstream currently doesn't work with the version of the macOS SDK
+  # we're building against in nix-darwin without a patch.
+  # this patch has been submitted upstream at https://github.com/prometheus/node_exporter/pull/2327
+  # and only needs to be carried until it lands in a new release.
+  patches = lib.optionals stdenv.isDarwin [ ./node-exporter/node-exporter-darwin.patch ];
+
   excludedPackages = [ "docs/node-mixin" ];
 
   ldflags = [
diff --git a/pkgs/servers/monitoring/prometheus/node-exporter/node-exporter-darwin.patch b/pkgs/servers/monitoring/prometheus/node-exporter/node-exporter-darwin.patch
new file mode 100644
index 000000000000..8077bbc47511
--- /dev/null
+++ b/pkgs/servers/monitoring/prometheus/node-exporter/node-exporter-darwin.patch
@@ -0,0 +1,17 @@
+diff --git a/collector/powersupplyclass_darwin.go b/collector/powersupplyclass_darwin.go
+index a070f64..01d7f18 100644
+--- a/collector/powersupplyclass_darwin.go
++++ b/collector/powersupplyclass_darwin.go
+@@ -18,9 +18,11 @@ package collector
+ 
+ /*
+ #cgo LDFLAGS: -framework IOKit -framework CoreFoundation
++#include <CoreFoundation/CFNumber.h>
++#include <CoreFoundation/CFRunLoop.h>
++#include <CoreFoundation/CFString.h>
+ #include <IOKit/ps/IOPowerSources.h>
+ #include <IOKit/ps/IOPSKeys.h>
+-#include <CoreFoundation/CFArray.h>
+ 
+ // values collected from IOKit Power Source APIs
+ // Functions documentation available at
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 03811e56a0b2..63fe1960ff9f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -22000,7 +22000,9 @@ with pkgs;
   prometheus-nextcloud-exporter = callPackage ../servers/monitoring/prometheus/nextcloud-exporter.nix { };
   prometheus-nginx-exporter = callPackage ../servers/monitoring/prometheus/nginx-exporter.nix { };
   prometheus-nginxlog-exporter = callPackage ../servers/monitoring/prometheus/nginxlog-exporter.nix { };
-  prometheus-node-exporter = callPackage ../servers/monitoring/prometheus/node-exporter.nix { };
+  prometheus-node-exporter = callPackage ../servers/monitoring/prometheus/node-exporter.nix {
+    inherit (darwin.apple_sdk.frameworks) CoreFoundation IOKit;
+  };
   prometheus-openldap-exporter = callPackage ../servers/monitoring/prometheus/openldap-exporter.nix { };
   prometheus-openvpn-exporter = callPackage ../servers/monitoring/prometheus/openvpn-exporter.nix { };
   prometheus-pihole-exporter = callPackage ../servers/monitoring/prometheus/pihole-exporter.nix {  };