Move numpy-scipy-support.nix file from the top-level to development/python-modules.

The top-level is not supposed to contain sub-directories, IMHO.

pkgs/development/python-modules/numpy-scipy-support.nix

@@ -0,0 +1,53 @@
+{
+  # Python package expression
+  python,
+  # Name of package (e.g. numpy or scipy)
+  pkgName,
+  # Atlas math library
+  atlas
+}:
+
+{
+
+  # First "install" the package, then import what was installed, and call the
+  # .test() function, which will run the test suite.
+  checkPhase = ''
+    runHook preCheck
+
+    _python=${python}/bin/${python.executable}
+
+    # We will "install" into a temp directory, so that we can run the
+    # tests (see below).
+    install_dir="$TMPDIR/test_install"
+    install_lib="$install_dir/lib/${python.libPrefix}/site-packages"
+    mkdir -p $install_dir
+    $_python setup.py install \
+      --install-lib=$install_lib \
+      --old-and-unmanageable \
+      --prefix=$install_dir > /dev/null
+
+    # Create a directory in which to run tests (you get an error if you try to
+    # import the package when you're in the current directory).
+    mkdir $TMPDIR/run_tests
+    pushd $TMPDIR/run_tests > /dev/null
+    # Temporarily add the directory we installed in to the python path
+    # (not permanently, or this pythonpath will wind up getting exported),
+    # and run the test suite.
+    PYTHONPATH="$install_lib:$PYTHONPATH" $_python -c \
+      'import ${pkgName}; ${pkgName}.test("fast", verbose=10)'
+    popd > /dev/null
+
+    runHook postCheck
+  '';
+
+  # Creates a site.cfg telling the setup script where to find depended-on 
+  # math libraries.
+  preBuild = ''
+    echo "Creating site.cfg file..."
+    cat << EOF > site.cfg
+    [atlas]
+    include_dirs = ${atlas}/include
+    library_dirs = ${atlas}/lib
+    EOF
+  '';
+}