Add nixos support and move scripts to bin/

.envrc

+PATH_add bin
+
+export IDF_PATH=$PWD/esp-idf
+export IDF_TOOLS_PATH=$IDF_PATH/tools

bin/nixos-patch-idf

+#!/usr/bin/env nix-shell
+#!nix-shell --pure --keep IDF_PATH -i zsh -p zsh gnused
+
+sed -ir 's|^#!/bin/bash|#!/usr/bin/env bash|' $IDF_PATH/tools/kconfig/lxdialog/check-lxdialog.sh

default.nix → shell.nix

@@ -2,6 +2,21 @@
 
 let
   inherit (nixpkgs) pkgs;
+
+  # esp-idf as of Nov 2019 requires pyparsing < 2.4
+  python2 = let
+    packageOverrides = self: super: {
+            pyparsing = super.pyparsing.overridePythonAttrs( old: rec {
+                version = "2.3.1";
+                src = super.fetchPypi {
+                    pname="pyparsing";
+                    inherit version;
+                    sha256="66c9268862641abcac4a96ba74506e594c884e3f57690a696d21ad8210ed667a";
+                };
+        });
+    };
+    in pkgs.python2.override{inherit packageOverrides; self=python2;};
+
 in
 
 pkgs.stdenv.mkDerivation {
@@ -15,6 +30,6 @@ pkgs.stdenv.mkDerivation {
   shellHook = ''
     export NIX_CFLAGS_LINK=-lncurses
     export IDF_PATH=./esp-idf
+    export IDF_TOOLS_PATH=$IDF_PATH/tools
   '';
 }
-