{ lib
, stdenv
, mkMesonLibrary

, nix-util
, nix-store
, nix-fetchers
, nix-expr
, nix-flake
, nix-main
, editline
, readline
, lowdown
, nlohmann_json

# Configuration Options

, version

# Whether to enable Markdown rendering in the Nix binary.
, enableMarkdown ? !stdenv.hostPlatform.isWindows

# Which interactive line editor library to use for Nix's repl.
#
# Currently supported choices are:
#
# - editline (default)
# - readline
, readlineFlavor ? if stdenv.hostPlatform.isWindows then "readline" else "editline"
}:

let
  inherit (lib) fileset;
in

mkMesonLibrary (finalAttrs: {
  pname = "nix-cmd";
  inherit version;

  workDir = ./.;
  fileset = fileset.unions [
    ../../nix-meson-build-support
    ./nix-meson-build-support
    ../../.version
    ./.version
    ./meson.build
    ./meson.options
    (fileset.fileFilter (file: file.hasExt "cc") ./.)
    (fileset.fileFilter (file: file.hasExt "hh") ./.)
  ];

  buildInputs = [
    ({ inherit editline readline; }.${readlineFlavor})
  ] ++ lib.optional enableMarkdown lowdown;

  propagatedBuildInputs = [
    nix-util
    nix-store
    nix-fetchers
    nix-expr
    nix-flake
    nix-main
    nlohmann_json
  ];

  preConfigure =
    # "Inline" .version so it's not a symlink, and includes the suffix.
    # Do the meson utils, without modification.
    ''
      chmod u+w ./.version
      echo ${version} > ../../.version
    '';

  mesonFlags = [
    (lib.mesonEnable "markdown" enableMarkdown)
    (lib.mesonOption "readline-flavor" readlineFlavor)
  ];

  env = lib.optionalAttrs (stdenv.isLinux && !(stdenv.hostPlatform.isStatic && stdenv.system == "aarch64-linux")) {
    LDFLAGS = "-fuse-ld=gold";
  };

  meta = {
    platforms = lib.platforms.unix ++ lib.platforms.windows;
  };

})