make qthing ready for NixOS

default.nix

+{ nixpkgs ? import <nixpkgs> {} }:
+
+let
+  inherit (nixpkgs) pkgs;
+in
+
+pkgs.stdenv.mkDerivation {
+  name = "esp-idf-env";
+  buildInputs = with pkgs; [
+    gawk gperf gettext automake bison flex texinfo help2man libtool autoconf ncurses5 bash
+    (python2.withPackages (ppkgs: with ppkgs; [ pyserial future cryptography pyelftools click ]))
+    (python3.withPackages (ppkgs: with ppkgs; [ paho-mqtt ]))
+    (pkgs.callPackage ./esp32-toolchain.nix {})
+  ];
+  shellHook = ''
+    export NIX_CFLAGS_LINK=-lncurses
+    export IDF_PATH=./esp-idf
+  '';
+}
+

esp32-toolchain.nix

+{ stdenv, fetchurl, makeWrapper, buildFHSUserEnv }:
+
+let
+  fhsEnv = buildFHSUserEnv {
+    name = "esp32-toolchain-env";
+    targetPkgs = pkgs: with pkgs; [ zlib ];
+    runScript = "";
+  };
+in
+
+stdenv.mkDerivation rec {
+  name = "esp32-toolchain";
+  version = "1.22.0";
+
+  src = fetchurl {
+    url = "https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz";
+    sha256 = "0mji8jq1dg198z8bl50i0hs3drdqa446kvf6xpjx9ha63lanrs9z";
+  };
+
+  buildInputs = [ makeWrapper ];
+
+  phases = [ "unpackPhase" "installPhase" ];
+
+  installPhase = ''
+    cp -r . $out
+    for FILE in $(ls $out/bin); do
+      FILE_PATH="$out/bin/$FILE"
+      if [[ -x $FILE_PATH ]]; then
+        mv $FILE_PATH $FILE_PATH-unwrapped
+        makeWrapper ${fhsEnv}/bin/esp32-toolchain-env $FILE_PATH --add-flags "$FILE_PATH-unwrapped"
+      fi
+    done
+  '';
+
+  meta = with stdenv.lib; {
+    description = "ESP32 toolchain";
+    homepage = https://docs.espressif.com/projects/esp-idf/en/stable/get-started/linux-setup.html;
+    license = licenses.gpl3;
+  };
+}

ota.py

-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 # TODO: read from header?
 BROKER = "mqtt.c3pb.hack"

set-device

-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 

set-environment

-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e