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def pre_install():
"""
Do any setup required before the install hook.
"""
install_charmhelpers()
install_packages()
def install_charmhelpers():
"""
Install the charmhelpers library, if not present.
"""
try:
import charmhelpers # noqa
except ImportError:
import subprocess
subprocess.check_call(['apt-get', 'install', '-y', 'python-pip'])
subprocess.check_call(['pip', 'install', 'charmhelpers'])
def install_packages():
from charmhelpers.fetch import apt_install
apt_install(['python-jinja2', 'python-yaml'], fatal=True)
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