Check if the latest published artifact on charmstore matches with current github tip for a given branch

charm-is-latest.sh

function charmislatest() {
   if [ ! ${#@} -ge 2 ]; then
       echo -e "Please provide a charm name and a branch" && return;
   fi
   q=$(curl -s https://api.github.com/repos/openstack/charm-$1/commits/stable/$2 | python -c "import sys, json; q=json.load(sys.stdin); print q['sha']")
   head=$(curl -s https://api.jujucharms.com/charmstore/v5/$1/meta/extra-info |  python -c "import sys, json; q=json.load(sys.stdin)['vcs-revisions'][-1]; print q['commit'];")
   if [ "$head" == "$q" ]; then
      echo "OK - $1 (Charmstore: $head == Github($2): $q)"
   else
      echo "Not OK - Charm is not latest: $q != $head"
   fi
}