nix-shell for Zephyr development

shell.nix

# Shell configuration for Zephyr work
# This currently requires the unstable channel for the newest tools.
{ pkgs ? import <unstable> {} }:
let
  python-packages = pkgs.python3.withPackages(p: with p; [
    pyelftools
    pyyaml
    pykwalify
    canopen
    packaging
    progress
    psutil
    anytree
    intelhex
    west

    cryptography
    intelhex
    click
    cbor
  ]);
  packages = with pkgs; [
    gcc-arm-embedded
    cmake
    ninja
    gperf
    python3
    ccache
    qemu
    dtc
    (python-packages)

    # For mcuboot development, we want both Rust and go.
    go
    openssl.dev
    pkgconfig
    sqlite.dev
    cargo
  ];
in
pkgs.mkShell {
  nativeBuildInputs = packages;

  shellHook = ''
    export ZEPHYR_TOOLCHAIN_VARIANT=gnuarmemb
    export GNUARMEMB_TOOLCHAIN_PATH=${pkgs.gcc-arm-embedded}
    source ./zephyr/zephyr-env.sh
  '';
}

i had to use nix eval --raw on #L33 to make the GNUARMEMB_TOOLCHAIN_PATH work.

i had to use nix eval --raw on #L33 to make the GNUARMEMB_TOOLCHAIN_PATH work.

I'm not actually sure why I didn't, but --raw seems better.

This version expands directly using nix instead of having to run something to do it.