From 83e56a3a9015816afb54def60cd1ba926b3b5804 Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Sun, 5 Mar 2023 22:32:56 +0000
Subject: [PATCH] add swconfig package

---
 pkgs/default.nix          |  1 +
 pkgs/swconfig/default.nix | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 pkgs/swconfig/default.nix

diff --git a/pkgs/default.nix b/pkgs/default.nix
index 332bb75..cc5847b 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -37,4 +37,5 @@
   # https://sourceforge.net/p/squashfs/mailman/message/26599379/
   lzma = callPackage ./lzma {};
 
+  swconfig = callPackage ./swconfig {};
 }
diff --git a/pkgs/swconfig/default.nix b/pkgs/swconfig/default.nix
new file mode 100644
index 0000000..ac95205
--- /dev/null
+++ b/pkgs/swconfig/default.nix
@@ -0,0 +1,33 @@
+{ stdenv, buildPackages, libnl, ...} :
+let switchDotH = buildPackages.fetchurl {
+  url = "https://git.openwrt.org/?p=openwrt/openwrt.git;a=blob_plain;f=target/linux/generic/files/include/uapi/linux/switch.h;hb=99a188828713d6ff9c541590b08d4e63ef52f6d7";
+  sha256 = "15kmhhcpd84y4f45rf8zai98c61jyvkc37p90pcxirna01x33wi8";
+  name="switch.h";
+};
+in stdenv.mkDerivation {
+  src = buildPackages.fetchFromGitHub {
+    owner = "jekader";
+    repo = "swconfig";
+    rev = "66c760893ecdd1d603a7231fea9209daac57b610";
+    sha256 = "0hi2rj1a1fbvr5n1090q1zzigjyxmn643jzrwngw4ij0g82za3al";
+  };
+  name = "swconfig";
+  buildInputs = [ buildPackages.pkgconfig ];
+  nativeBuildInputs = [ libnl ];
+  CFLAGS="-O2 -Ifrom_kernel -I${libnl.dev}/include/libnl3";
+  LDFLAGS="-L${libnl.out}/lib";
+
+  patchPhase = ''
+    mkdir -p from_kernel/linux
+    cp ${switchDotH} from_kernel/linux/switch.h
+  '';
+
+  buildPhase = ''
+    make swconfig
+    $STRIP swconfig
+  '';
+  installPhase = ''
+    mkdir -p $out/bin
+    cp swconfig $out/bin
+  '';
+}