{ user, pkgs, unstable, ... }:

let

nixShellWrapper = command: pkgs.writeShellScript "${command}_nix-shell_wrapper.sh" ''

argv=( "$@" )

exec nix-shell --pure --run "${command} ''${argv[*]}"

'';

nixShellRustFmt = nixShellWrapper "rustfmt";

nixShellRLS = pkgs.writeShellScript "rls_with-sysroot_nix-shell_wrapper.sh" ''

export LD_LIBRARY_PATH=$(${nixShellWrapper "rustc"} --print sysroot)/lib:$LD_LIBRARY_PATH

source ${nixShellWrapper "rls"}

'';

in

{

environment.systemPackages = [

unstable.carnix

( unstable.rr.overrideAttrs (oldAttrs: rec {

version = "2019-08-03";

pname = "rr";

name = "${pname}-${version}";

src = pkgs.fetchFromGitHub {

owner = "mozilla";

repo = "rr";

rev = "37dfe3320d4dbb0a93810f9178d5fb838e726217";

sha256 = "14ynvkrjm70f5jyd993cry1gy0kp7igwaik73m51zb6q79bp1lgr";

};

buildInputs = with unstable; [ python3Packages.python python3Packages.pexpect ] ++ oldAttrs.buildInputs;

} ) )

];

boot.kernel.sysctl."kernel.perf_event_paranoid" = 1; # required for rr recording

vscode.settings = {

"rust-client.disableRustup" = true;

"rust-client.rlsPath" = "${nixShellRLS}";

"rust.rustfmt_path" = "${nixShellRustFmt}";

"rust.clippy_preference" = "on";

"lldb.adapterType" = "native";

};

vscode.pulledExtensions = [

"rust-lang.rust"

"bungcip.better-toml"

];

vscode.packagedExtensions = [ (

unstable.vscode-utils.buildVscodeExtension rec {

name = "vadimcn.vscode-lldb-x86_64-linux";

src = pkgs.requireFile {

url = "https://github.com/vadimcn/vscode-lldb/releases/latest/download/vscode-lldb-x86_64-linux.vsix";

name = "vadimcn-vscode-lldb-x86_64-linux.zip";

sha256 = "186f8f6r2awiqaz0gcknm4zdf8vxfxmzxg64l0z8is6q307gr90m";

};

vscodeExtUniqueId = name;

dontPatchELF = false;

dontStrip = false;

}

) ];

}