From 0558c8728892f69ab80bbfe5e23bd95f402a7725 Mon Sep 17 00:00:00 2001
From: Jaka Hudoklin <jakahudoklin@gmail.com>
Date: Mon, 10 Mar 2014 10:06:04 +0100
Subject: [PATCH] buildPythonPackage: add shell hook for instant development

---
 .../python-modules/generic/default.nix           | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/pkgs/development/python-modules/generic/default.nix b/pkgs/development/python-modules/generic/default.nix
index 6debcd818e5..45c8653bc19 100644
--- a/pkgs/development/python-modules/generic/default.nix
+++ b/pkgs/development/python-modules/generic/default.nix
@@ -38,6 +38,12 @@
 
 , meta ? {}
 
+# Execute before shell hook
+, preShellHook ? ""
+
+# Execute after shell hook
+, postShellHook ? ""
+
 , ... } @ attrs:
 
 # Keep extra attributes from `attrs`, e.g., `patchPhase', etc.
@@ -150,6 +156,16 @@ python.stdenv.mkDerivation (attrs // {
       done
     '';
 
+  shellHook = attrs.shellHook or ''
+    mkdir -p /tmp/$name/lib/${python.libPrefix}/site-packages
+    ${preShellHook}
+    export PATH="/tmp/$name/bin:$PATH"
+    export PYTHONPATH="/tmp/$name/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
+    python setup.py develop --prefix /tmp/$name
+    ${postShellHook}
+    return
+  '';
+
   meta = with lib.maintainers; {
     # default to python's platforms
     platforms = python.meta.platforms;