Add improvements to nix development environment for python

dotfiles/nixpkgs/.nixpkgs

@@ -0,0 +1 @@
+/home/taylor/.nixpkgs

nix/development/default.nix

@@ -1,21 +1,25 @@
 { config, pkgs, ... }:
 {
-  environment = { 
+  environment = {
     variables = {
       EDITOR = "nvim";
     };
 
     systemPackages = with pkgs; [
-      bar-xft                 # Lightweight xcb based bar
+      bar-xft                     # Lightweight xcb based bar
-      cabal-install           # Haskell package installer
+      cabal-install               # Haskell package installer
-      curl                    # Tool for general HTTP, FTP, etc work 
+      curl                        # Tool for general HTTP, FTP, etc work
-      ghc                     # Haskell Compiler
+      freetype                    # Library to render fonts required by some packages
-      git                     # Source control
+      gcc                         # GNU Compiler Collection
-      neovim                  # Better vim
+      ghc                         # Haskell compiler
-      python3                 # Python 3
+      git                         # Source control
-      silver-searcher         # Better than grep
+      libpng                      # PNG library
-      vim                     # Regular ole' vim
+      neovim                      # Better vim
-      wget                    # Standard GNU package for HTTP, FTP, etc file retrieval
+      python3                     # Python 3
+      python34Packages.setuptools # Python setuptools
+      silver-searcher             # Better than grep
+      vim                         # Regular ole' vim
+      wget                        # Standard GNU package for HTTP, FTP, etc file retrieval
     ];
   };
 }

nix/development/env/python/default.nix

@@ -0,0 +1,37 @@
+#A quick-and-dirty environment for nix-shell that gets you started with python34, pip, and virtualenv.
+# Simply run nix-shell with the directory that has this file in it to drop into a shell with everything
+# you need.
+
+with import <nixpkgs> {};
+with pkgs.python3Packages;
+
+buildPythonPackage {
+  name = "pythonEnv";
+  buildInputs = [
+      freetype
+      git                           # Source control
+      atlas                         # ATLAS
+      blas                          # BLAS
+      libxml2                       # XML2 library
+      libxslt                       # XLST library
+      libzip                        # Zip library
+      liblapack                     # Linear Algebra pack library
+      libpng                        # PNG library
+      pkgconfig
+      python3
+      python3Packages.virtualenv
+      python3Packages.setuptools
+      stdenv
+      zlib ];
+  src = null;
+  # When used as `nix-shell --pure`
+  shellHook = ''
+  unset http_proxy
+  export GIT_SSL_CAINFO=/etc/ssl/certs/ca-bundle.crt
+  '';
+  # used when building environments
+  extraCmds = ''
+  unset http_proxy # otherwise downloads will fail ("nodtd.invalid")
+  export GIT_SSL_CAINFO=/etc/ssl/certs/ca-bundle.crt
+  '';
+}

nix/display/default.nix

@@ -24,6 +24,7 @@
     enableGhostscriptFonts = true;
     fonts = with pkgs; [
       corefonts            # Microsoft free fonts
+      freetype             # Freetype fonts
       inconsolata          # Great monospaced font
       ubuntu_font_family   # Another great font family
       unifont              # International language support