Pyramid documentation sphinx theme update

pyramid_theme_update.py

# Add and use Pylons theme
from subprocess import call, Popen, PIPE

p = Popen('which git', shell=True, stdout=PIPE)
git = p.stdout.read().strip()
cwd = os.getcwd()
_themes = os.path.join(cwd, '_themes')

if not os.path.isdir(_themes):
    call([git, 'clone', 'git://github.com/Pylons/pylons_sphinx_theme.git',
            '_themes'])
else:
    os.chdir(_themes)
    call([git, 'checkout', 'master'])
    call([git, 'pull'])
    os.chdir(cwd)

sys.path.append(os.path.abspath('_themes'))
html_theme_path = ['_themes']
html_theme = 'pyramid'
html_theme_options = dict(
    github_url='https://github.com/Pylons/pyramid'
    )