From a5160ce3c3fc6cbe21d4b916fd2cefec5eaa3650 Mon Sep 17 00:00:00 2001
From: Christian Bourjau <christian.bourjau@quantco.com>
Date: Mon, 12 Dec 2022 18:37:08 +0100
Subject: [PATCH] libsolv: Build without rpm dependency on darwin

RPM is no longer available for
Darwin ( https://github.com/NixOS/nixpkgs/pull/196350 ). Libsolv is used by downstream
packages such as micromamba which have no requirement on RPM.
---
 .../development/libraries/libsolv/default.nix | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/pkgs/development/libraries/libsolv/default.nix b/pkgs/development/libraries/libsolv/default.nix
index 7267b7d99b2ff..1c6a6370eb540 100644
--- a/pkgs/development/libraries/libsolv/default.nix
+++ b/pkgs/development/libraries/libsolv/default.nix
@@ -1,6 +1,9 @@
 { lib, stdenv, fetchFromGitHub, cmake, ninja, pkg-config
 , zlib, xz, bzip2, zchunk, zstd
-, expat, rpm, db }:
+, expat
+, withRpm ? !stdenv.isDarwin, rpm
+, db
+}:
 
 stdenv.mkDerivation rec {
   version  = "0.7.22";
@@ -15,19 +18,21 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [
     "-DENABLE_COMPLEX_DEPS=true"
-    "-DENABLE_RPMMD=true"
-    "-DENABLE_RPMDB=true"
-    "-DENABLE_PUBKEY=true"
-    "-DENABLE_RPMDB_BYRPMHEADER=true"
     "-DENABLE_LZMA_COMPRESSION=true"
     "-DENABLE_BZIP2_COMPRESSION=true"
     "-DENABLE_ZSTD_COMPRESSION=true"
     "-DENABLE_ZCHUNK_COMPRESSION=true"
     "-DWITH_SYSTEM_ZCHUNK=true"
-  ];
+  ] ++ lib.optionals ( withRpm ) [
+    "-DENABLE_PUBKEY=true"
+    "-DENABLE_RPMDB=true"
+    "-DENABLE_RPMDB_BYRPMHEADER=true"
+    "-DENABLE_RPMMD=true"
+  ] ;
 
   nativeBuildInputs = [ cmake ninja pkg-config ];
-  buildInputs = [ zlib xz bzip2 zchunk zstd expat rpm db ];
+  buildInputs = [ zlib xz bzip2 zchunk zstd expat db ]
+                ++ lib.optionals ( withRpm ) [ rpm ];
 
   meta = with lib; {
     description = "A free package dependency solver";