1 files changed, 49 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/nplusone/default.nix b/nixpkgs/pkgs/development/python-modules/nplusone/default.nix
new file mode 100644
index 00000000000..c2f484cb3a9
--- /dev/null
+++ b/nixpkgs/pkgs/development/python-modules/nplusone/default.nix
@@ -0,0 +1,49 @@
+{ blinker, buildPythonPackage, fetchFromGitHub, lib, isPy27, six, mock, pytest
+, webtest, pytestcov, pytest-django, pytest-pythonpath, flake8, sqlalchemy
+, flask_sqlalchemy, peewee }:
+
+buildPythonPackage rec {
+  pname = "nplusone";
+  version = "1.0.0";
+  disabled = isPy27;
+
+  src = fetchFromGitHub {
+    owner = "jmcarp";
+    repo = "nplusone";
+    rev = "v${version}";
+    sha256 = "0qdwpvvg7dzmksz3vqkvb27n52lq5sa8i06m7idnj5xk2dgjkdxg";
+  };
+
+  # The tests assume the source code is in an nplusone/ directory. When using
+  # the Nix sandbox, it will be in a source/ directory instead, making the
+  # tests fail.
+  prePatch = ''
+    substituteInPlace tests/conftest.py \
+      --replace nplusone/tests/conftest source/tests/conftest
+  '';
+
+  checkPhase = ''
+    pytest tests/
+  '';
+
+  propagatedBuildInputs = [ six blinker ];
+  checkInputs = [
+    mock
+    pytest
+    webtest
+    pytestcov
+    pytest-django
+    pytest-pythonpath
+    flake8
+    sqlalchemy
+    flask_sqlalchemy
+    peewee
+  ];
+
+  meta = with lib; {
+    description = "Detecting the n+1 queries problem in Python";
+    homepage = "https://github.com/jmcarp/nplusone";
+    maintainers = with maintainers; [ cript0nauta ];
+    license = licenses.mit;
+  };
+}