pythonPackages.python_magic: fix build and run tests

pkgs/development/python-modules/python-magic/default.nix

@@ -1,25 +1,37 @@
-{ buildPythonPackage, lib, fetchPypi, file, stdenv }:
+{ lib
+, stdenv
+, python
+, buildPythonPackage
+, fetchFromGitHub
+, substituteAll
+, file
+, glibcLocales
+}:
 
 buildPythonPackage rec {
   pname = "python-magic";
   version = "0.4.22";
 
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "ca884349f2c92ce830e3f498c5b7c7051fe2942c3ee4332f65213b8ebff15a62";
+  src = fetchFromGitHub {
+    owner = "ahupp";
+    repo = "python-magic";
+    rev = version;
+    sha256 = "0zbdjr5shijs0jayz7gycpx0kn6v2bh83dpanyajk2vmy47jvbd6";
   };
 
-  postPatch = ''
-    substituteInPlace magic.py --replace "ctypes.util.find_library('magic')" "'${file}/lib/libmagic${stdenv.hostPlatform.extensions.sharedLibrary}'"
+  patches = [
+    (substituteAll {
+      src = ./libmagic-path.patch;
+      libmagic = "${file}/lib/libmagic${stdenv.hostPlatform.extensions.sharedLibrary}";
+    })
+  ];
+
+  checkInputs = [ glibcLocales ];
+
+  checkPhase = ''
+    LC_ALL="en_US.UTF-8" ${python.interpreter} test/test.py
   '';
 
-  doCheck = false;
-
-  # TODO: tests are failing
-  #checkPhase = ''
-  #  ${python}/bin/${python.executable} ./test.py
-  #'';
-
   meta = {
     description = "A python interface to the libmagic file type identification library";
     homepage = "https://github.com/ahupp/python-magic";

pkgs/development/python-modules/python-magic/libmagic-path.patch

@@ -0,0 +1,17 @@
+diff --git a/magic/loader.py b/magic/loader.py
+index 6b2bfcb..69778af 100644
+--- a/magic/loader.py
++++ b/magic/loader.py
+@@ -5,11 +5,7 @@ import glob
+ def load_lib():
+   libmagic = None
+   # Let's try to find magic or magic1
+-  dll = ctypes.util.find_library('magic') \
+-        or ctypes.util.find_library('magic1') \
+-        or ctypes.util.find_library('cygmagic-1') \
+-        or ctypes.util.find_library('libmagic-1') \
+-        or ctypes.util.find_library('msys-magic-1')  # for MSYS2
++  dll = '@libmagic@'
+ 
+   # necessary because find_library returns None if it doesn't find the library
+   if dll: