From a1c19f8389aa5135330042c72df36e603c1645db Mon Sep 17 00:00:00 2001
From: "Adam J. Stewart" <ajstewart426@gmail.com>
Date: Thu, 19 Oct 2017 02:26:04 -0500
Subject: [PATCH] Allow documentation to build in Python 3 (#5736)

---
 lib/spack/docs/conf.py | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/lib/spack/docs/conf.py b/lib/spack/docs/conf.py
index b27a3a5538..9b4101fdfe 100644
--- a/lib/spack/docs/conf.py
+++ b/lib/spack/docs/conf.py
@@ -61,11 +61,6 @@
 os.environ['SPACK_ROOT'] = spack_root
 os.environ['PATH'] += '%s%s/bin' % (os.pathsep, spack_root)
 
-# Get the spack version for use in the docs
-spack_version =  subprocess.Popen(
-    [spack_root + '/bin/spack', '-V'],
-    stderr=subprocess.PIPE).communicate()[1].strip().split('.')
-
 # Set an environment variable so that colify will print output like it would to
 # a terminal.
 os.environ['COLIFY_SIZE'] = '25x120'
@@ -192,9 +187,9 @@ def setup(sphinx):
 # built documents.
 #
 # The short X.Y version.
-version = '.'.join(spack_version[:2])
+version = str(spack.spack_version.up_to(2))
 # The full version, including alpha/beta/rc tags.
-release = '.'.join(spack_version[:2])
+release = str(spack.spack_version.up_to(2))
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.