WIP: add shell.nix to run in a nix environment

rust-toolchain

@@ -0,0 +1 @@
+nightly-2023-09-24

shell.nix

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+#
+# Adapted from: https://nixos.wiki/wiki/Rust
+#
+# let
+#   nixgl = import (builtins.fetchTarball {
+#     name = "NixGL";
+#     url = https://github.com/guibou/nixGL/tarball/489d6b095ab9d289fe11af0219a9ff00fe87c7c5;
+#     # Hash obtained using `nix-prefetch-url --unpack <url>`
+#     sha256 = "03kwsz8mf0p1v1clz42zx8cmy6hxka0cqfbfasimbj858lyd930k";
+#   }) {}; # TODO: nixGL WIP for this shell, may need to switch to flake
+# in
+{ pkgs ? import <nixpkgs> {} }:
+  pkgs.mkShell rec {
+    buildInputs = with pkgs; [
+      llvmPackages_latest.llvm
+      llvmPackages_latest.bintools
+      zlib.out
+      pkg-config
+      fontconfig
+      freetype
+      rustup
+      llvmPackages_latest.lld
+      # for wasm
+      openssl
+      # Only for building bracket-lib, I think:
+      alsa-lib
+      systemd
+      # To enable faster linking in Rust projects
+      clang
+      mold
+      # only for bevy
+      cmake # needed via expat-sys
+    ];
+     # Only for building bracket-lib, I think:
+    nativeBuildInputs = [ pkgs.pkg-config ];
+    # TODO: change this to check if there's a rust-toolchain file, otherwise use
+    # the current toolchain
+    RUSTC_VERSION = pkgs.lib.readFile ./rust-toolchain;
+    # https://github.com/rust-lang/rust-bindgen#environment-variables
+    LIBCLANG_PATH = pkgs.lib.makeLibraryPath [ pkgs.llvmPackages_latest.libclang.lib ];
+    HISTFILE = toString ./.history;
+    shellHook = ''
+      export PATH=$PATH:''${CARGO_HOME:-~/.cargo}/bin
+      export PATH=$PATH:''${RUSTUP_HOME:-~/.rustup}/toolchains/$RUSTC_VERSION-x86_64-unknown-linux-gnu/bin/
+      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${pkgs.xorg.libX11}/lib
+      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${pkgs.xorg.libXcursor}/lib
+      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${pkgs.xorg.libXrandr}/lib
+      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${pkgs.xorg.libXi}/lib
+      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${pkgs.libGL}/lib
+      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${pkgs.fontconfig.lib}/lib      
+      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${pkgs.freetype}/lib
+      '';
+    # Add libvmi precompiled library to rustc search path
+    RUSTFLAGS = (builtins.map (a: ''-L ${a}/lib'') [
+      # pkgs.libvmi
+    ]);
+    # Add libvmi, glibc, clang, glib headers to bindgen search path
+    BINDGEN_EXTRA_CLANG_ARGS = 
+    # Includes with normal include path
+    (builtins.map (a: ''-I"${a}/include"'') [
+      # pkgs.libvmi
+      pkgs.glibc.dev 
+    ])
+    # Includes with special directory paths
+    ++ [
+      ''-I"${pkgs.llvmPackages_latest.libclang.lib}/lib/clang/${pkgs.llvmPackages_latest.libclang.version}/include"''
+      ''-I"${pkgs.glib.dev}/include/glib-2.0"''
+      ''-I${pkgs.glib.out}/lib/glib-2.0/include/''
+    ];
+
+  }