juju-activate

#!/bin/bash -i
#
# Copyright 2014 Marco Ceppi <marco@ceppi.net>
#
# juju-list is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# juju-activate is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# For a full copy of the GNU General Public License, see
# <http://www.gnu.org/licenses/>.

# This is a script for a juju plugin to activate a specific environment.
set -e

if [ ! "$1" ]; then
  echo "Need to supply an environment" >&2
  exit 1
fi

if [ "$1" == '--description' ]; then
  echo "Sets the JUJU_ENV to the requested Juju environment and updates the prompt."
  exit 0
fi

if [ "$1" == '--help' ]; then
  echo "juju activate <juju-env>"
  echo ""
  echo "Set the JUJU_ENV to the requested Juju environment and update the command prompt."
  exit 0
fi

if ! juju switch -l | grep "$1" > /dev/null; then
  echo "Environment does not exist; Have you executed `juju init` and edited ~/.juju/environments.yaml?" >&2
  exit 1
fi

echo "Activating $1, to end session type 'exit'"
env PS1="($1)$PS1" JUJU_ENV="$1" bash --norc -i