From 25b3bf9e7d521256fe2944dfc5909ba381f7741c Mon Sep 17 00:00:00 2001
From: Benjamin Sparks <b.sparks@alugha.com>
Date: Fri, 25 Apr 2025 17:25:33 +0200
Subject: [PATCH] gz-utils: output doxygen documentation

---
 pkgs/by-name/gz/gz-utils/package.nix | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/pkgs/by-name/gz/gz-utils/package.nix b/pkgs/by-name/gz/gz-utils/package.nix
index a3f63505afea..c41ec4ef71d7 100644
--- a/pkgs/by-name/gz/gz-utils/package.nix
+++ b/pkgs/by-name/gz/gz-utils/package.nix
@@ -6,6 +6,8 @@
   # nativeBuildInputs
   cmake,
   gz-cmake,
+  doxygen,
+  graphviz,
 
   # buildInputs
   cli11,
@@ -28,6 +30,11 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-fYzysdB608jfMb/EbqiGD4hXmPxcaVTUrt9Wx0dBlto=";
   };
 
+  outputs = [
+    "doc"
+    "out"
+  ];
+
   # Remove vendored gtest, use nixpkgs' version instead.
   postPatch = ''
     rm -r test/gtest_vendor
@@ -39,6 +46,8 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     cmake
     gz-cmake
+    doxygen
+    graphviz
   ];
 
   buildInputs = [
@@ -53,6 +62,11 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeBool "GZ_UTILS_VENDOR_CLI11" false)
   ];
 
+  postBuild = ''
+    make doc
+    cp -r doxygen/html $doc
+  '';
+
   nativeCheckInputs = [ python3 ];
 
   checkInputs = [ gtest ];