pythonPackages.python-lz4: init at 2.1.0

Fetching from github repository instead of pypi so that all tests can
be run.

 - compatible with 2.7, 3+
 - all tests pass

pkgs/development/python-modules/python-lz4/default.nix

@@ -0,0 +1,40 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pytestrunner
+, pytest
+, psutil
+, setuptools_scm
+, pkgconfig
+, isPy3k
+, future
+}:
+
+buildPythonPackage rec {
+  pname = "python-lz4";
+  version = "2.1.0";
+
+  # get full repository inorder to run tests
+  src = fetchFromGitHub {
+    owner = pname;
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "1vjfplj37jcw1mf8l810dv76dx0raia3ylgyfy7sfsb3g17brjq6";
+  };
+
+  buildInputs = [ setuptools_scm pkgconfig pytestrunner ];
+  checkInputs = [ pytest psutil ];
+  propagatedBuildInputs = lib.optionals (!isPy3k) [ future ];
+
+  # give a hint to setuptools_scm on package version
+  preBuild = ''
+    export SETUPTOOLS_SCM_PRETEND_VERSION="v${version}"
+  '';
+
+  meta = {
+     description = "LZ4 Bindings for Python";
+     homepage = https://github.com/python-lz4/python-lz4;
+     license = lib.licenses.bsd0;
+     maintainers = with lib.maintainers; [ costrouc ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -461,6 +461,8 @@ in {
 
   python-hosts = callPackage ../development/python-modules/python-hosts { };
 
+  python-lz4 = callPackage ../development/python-modules/python-lz4 { };
+
   python3-openid = callPackage ../development/python-modules/python3-openid { };
 
   python-periphery = callPackage ../development/python-modules/python-periphery { };