Documentation: describe how to programatically obtain host paths on NixOS

1 files changed, 30 insertions, 0 deletions

diff --git a/doc/host-config.nix b/doc/host-config.nix
new file mode 100644
index 0000000..340598e
--- /dev/null
+++ b/doc/host-config.nix
@@ -0,0 +1,30 @@
+{ stdenv
+, jo
+, coreutils
+, gnused
+, glibc
+}:
+
+stdenv.mkDerivation rec  {
+  name = "host-config";
+
+  unpackPhase=''true'';
+
+  nativeBuildInputs = [ glibc jo coreutils gnused ];
+
+  buildPhase = ''
+   jo OS=linux \
+      ARCH=$(uname -m | sed 's/aarch64/arm64/' ) \
+      TOOLCHAIN_CONFIG=$(jo \
+        HOST_SYSTEM_HDR_DIR=${glibc.dev}/include \
+        HOST_SYSTEM_LIB_DIR=${glibc}/lib \
+        HOST_DYNAMIC_LINKER=$(ls ${glibc}/lib/ld-linux-*.so*) \
+      ) > host-config.json
+  '';
+
+  installPhase = ''
+    mkdir -p $out/share
+    cp host-config.json $out/share
+  '';
+
+}