hwi: 1.0.3 -> 1.1.2

hidapi needed to be added as a custom dependency to be able to build
from unstable.

pkgs/hwi/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, python3 }:
+{ pkgs, stdenv, fetchurl, fetchFromGitHub, python3 }:
 
 with stdenv.lib;
 
@@ -9,18 +9,22 @@ let
       mnemonic = self.callPackage ./mnemonic {};
       # HWI requires ecdsa <0.14 but nixpkgs has a newer version
       ecdsa = self.callPackage ./ecdsa {};
+      # HWI requires hidapi 0.7.99 but nixpkgs has a newer version
+      hidapi = self.callPackage ./hidapi {
+        inherit (pkgs) udev libusb1;
+      };
     };
   };
 in
 python.pkgs.buildPythonPackage rec {
   pname = "hwi";
-  version = "1.0.3";
+  version = "1.1.2";
 
   src = fetchFromGitHub {
     owner = "bitcoin-core";
     repo = "HWI";
     rev = version;
-    sha256 = "1xb8w6w6j6vv2ik2bb25y2w6m0gikmh5446jar0frfp6r6das5nn";
+    sha256 = "01xjkv74ksj8m0l6frk03wq82ilzp5gkz4rf7lhi1h6qkb9kb1x0";
   };
 
   # TODO: enable tests

pkgs/hwi/hidapi/default.nix

@@ -0,0 +1,32 @@
+{ stdenv, libusb1, udev, darwin, fetchPypi, buildPythonPackage, cython }:
+
+buildPythonPackage rec {
+  pname = "hidapi";
+  version = "0.7.99.post21";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "e0be1aa6566979266a8fc845ab0e18613f4918cf2c977fe67050f5dc7e2a9a97";
+  };
+
+  propagatedBuildInputs =
+    stdenv.lib.optionals stdenv.isLinux [ libusb1 udev ] ++
+    stdenv.lib.optionals stdenv.isDarwin [ darwin.IOKit darwin.apple_sdk.frameworks.CoreFoundation ] ++
+    [ cython ];
+
+  # Fix the USB backend library lookup
+  postPatch = stdenv.lib.optionalString stdenv.isLinux ''
+    libusb=${libusb1.dev}/include/libusb-1.0
+    test -d $libusb || { echo "ERROR: $libusb doesn't exist, please update/fix this build expression."; exit 1; }
+    sed -i -e "s|/usr/include/libusb-1.0|$libusb|" setup.py
+  '';
+
+  meta = with stdenv.lib; {
+    description = "A Cython interface to the hidapi from https://github.com/signal11/hidapi";
+    homepage = "https://github.com/trezor/cython-hidapi";
+    # license can actually be either bsd3 or gpl3
+    # see https://github.com/trezor/cython-hidapi/blob/master/LICENSE-orig.txt
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ np ];
+  };
+}