From 3ce85b22708769ff9d8b2b0ba79e4157dac46d74 Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Thu, 15 Oct 2015 09:27:05 -0400
Subject: [PATCH] spack: split spack_root from prefix

A foundation for allowing runtime configuring of the prefix.
---
 lib/spack/spack/__init__.py | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/lib/spack/spack/__init__.py b/lib/spack/spack/__init__.py
index caa09eb6e0..6e8d41895f 100644
--- a/lib/spack/spack/__init__.py
+++ b/lib/spack/spack/__init__.py
@@ -27,24 +27,26 @@
 from llnl.util.filesystem import *
 
 # This lives in $prefix/lib/spack/spack/__file__
-prefix = ancestor(__file__, 4)
+spack_root = ancestor(__file__, 4)
 
 # The spack script itself
-spack_file = join_path(prefix, "bin", "spack")
+spack_file = join_path(spack_root, "bin", "spack")
 
 # spack directory hierarchy
-etc_path       = join_path(prefix, "etc")
-lib_path       = join_path(prefix, "lib", "spack")
+lib_path       = join_path(spack_root, "lib", "spack")
 build_env_path = join_path(lib_path, "env")
 module_path    = join_path(lib_path, "spack")
 compilers_path = join_path(module_path, "compilers")
 test_path      = join_path(module_path, "test")
 hooks_path     = join_path(module_path, "hooks")
-var_path       = join_path(prefix, "var", "spack")
+var_path       = join_path(spack_root, "var", "spack")
 stage_path     = join_path(var_path, "stage")
+share_path     = join_path(spack_root, "share", "spack")
+
+prefix = spack_root
 opt_path       = join_path(prefix, "opt")
 install_path   = join_path(opt_path, "spack")
-share_path     = join_path(prefix, "share", "spack")
+etc_path       = join_path(prefix, "etc")
 
 #
 # Set up the packages database.