{ depot, pkgs, lib, ... }:

let
  imports = {
    inherit (depot.users.Profpatsch)
      writers;
  };

  version-check = pkgs.buildRustCrate {
    pname = "version-check";
    version = "0.9.2";
    crateName = "version-check";
    sha256 = "1vwvc1mzwv8ana9jv8z933p2xzgj1533qwwl5zr8mi89azyhq21v";
  };
  memchr = pkgs.buildRustCrate {
    pname = "memchr";
    version = "2.3.3";
    crateName = "memchr";
    sha256 = "1ivxvlswglk6wd46gadkbbsknr94gwryk6y21v64ja7x4icrpihw";
  };
  nom = pkgs.buildRustCrate {
    pname = "nom";
    version = "5.1.1";
    crateName = "nom";
    sha256 = "1gb4r6mjwd645jqh02nhn60i7qkw8cgy3xq1r4clnmvz3cmkv1l0";
    dependencies = [ memchr ];
    buildDependencies = [ version-check ];
    features = [ "std" "alloc" ];
  };

  netencode-rs-common = tests: imports.writers.rustSimpleLib {
    name = "netencode";
    dependencies = [
      nom
      depot.users.Profpatsch.execline.exec-helpers
    ];
    buildTests = tests;
    release = false;
    verbose = true;
  } (builtins.readFile ./netencode.rs);

  netencode-rs-tests = netencode-rs-common true;

  netencode-rs = netencode-rs-common false;

  gen = import ./gen.nix { inherit lib; };

  cfg-if = pkgs.buildRustCrate {
    pname = "cfg-if";
    version = "1.0.0";
    crateName = "cfg-if";
    sha256 = "1fzidq152hnxhg4lj6r2gv4jpnn8yivp27z6q6xy7w6v0dp6bai9";
  };

  log = pkgs.buildRustCrate {
    pname = "log";
    version = "0.4.11";
    crateName = "log";
    sha256 = "0m6xhqxsps5mgd7r91g5mqkndbh8zbjd58p7w75r330zl4n40l07";
    dependencies = [ cfg-if ];
  };

  serde_derive = pkgs.buildRustCrate {
    pname = "serde";
    version = "1.0.118";
    crateName = "serde";
    sha256 = "1kbi2csphq8m4z77fpd6v8jih10j7867wniqnlxnk308mrnxi4r2";
  };

  serde = pkgs.buildRustCrate {
    pname = "serde";
    version = "1.0.118";
    crateName = "serde";
    sha256 = "1kbi2csphq8m4z77fpd6v8jih10j7867wniqnlxnk308mrnxi4r2";
    features = [ "std" ];
  };

  mustache = pkgs.buildRustCrate {
    pname = "mustache";
    version = "0.9.0";
    crateName = "mustache";
    sha256 = "1zgl8l15i19lzp90icgwyi6zqdd31b9vm8w129f41d1zd0hs7ayq";
    dependencies = [ log serde ];
  };

  netencode-mustache = imports.writers.rustSimple {
    name = "netencode_mustache";
    dependencies = [
      depot.users.Profpatsch.arglib.netencode.rust
      netencode-rs
      mustache
    ];
  } (builtins.readFile ./netencode-mustache.rs);


  record-get = imports.writers.rustSimple {
    name = "record-get";
    dependencies = [
      netencode-rs
      depot.users.Profpatsch.execline.exec-helpers
      depot.users.Profpatsch.arglib.netencode.rust
    ];
  } ''
    extern crate netencode;
    extern crate arglib_netencode;
    extern crate exec_helpers;
    use netencode::{encode, dec};
    use netencode::dec::{Decoder, DecodeError};

    fn main() {
        let mut buf = vec![];
        let args = exec_helpers::args("record-get", 1);
        let field = match std::str::from_utf8(&args[0]) {
            Ok(f) => f,
            Err(_e) => exec_helpers::die_user_error("record-get", format!("The field name needs to be valid unicode"))
        };
        let u = netencode::u_from_stdin_or_die_user_error("record-get", &mut buf);
        match (dec::RecordDot {field, inner: dec::AnyU }).dec(u) {
            Ok(u) => encode(&mut std::io::stdout(), &u).expect("encoding to stdout failed"),
            Err(DecodeError(err)) => exec_helpers::die_user_error("record-get", err)
        }
    }
  '';

  record-splice-env = imports.writers.rustSimple {
    name = "record-splice-env";
    dependencies = [
      netencode-rs
      depot.users.Profpatsch.execline.exec-helpers
    ];
  } ''
    extern crate netencode;
    extern crate exec_helpers;
    use netencode::dec::{Record, Try, ScalarAsBytes, Decoder, DecodeError};

    fn main() {
        let mut buf = vec![];
        let u = netencode::u_from_stdin_or_die_user_error("record-splice-env", &mut buf);
        let (_, prog) = exec_helpers::args_for_exec("record-splice-env", 0);
        match Record(Try(ScalarAsBytes)).dec(u) {
            Ok(map) => {
                exec_helpers::exec_into_args(
                    "record-splice-env",
                    prog,
                    // some elements can’t be decoded as scalars, so just ignore them
                    map.into_iter().filter_map(|(k, v)| v.map(|v2| (k, v2)))
                );
            },
            Err(DecodeError(err)) => exec_helpers::die_user_error("record-splice-env", err),
        }
    }
  '';

in {
  inherit
   netencode-rs
   netencode-rs-tests
   netencode-mustache
   record-get
   record-splice-env
   gen
   ;
}