Poll git repo and deploy to app engine when git hooks are not possible.

autodeploy.zsh

# iterate through all git repos in projects folder
# fetch for any changes to remote
# for each branch, if it is different pull the changes and deploy

echo "Starting"
while true; do
  for project in $(ls projects); do
    echo "Checking for updates to $project"
    cd "projects/$project"
    branches=$(git remote -v update 2>&1 | grep -oEi "^\W+.*\w+$" | grep -v "up to date" | grep -oEi "\w+$")
    for branch in $branches; do
      echo "updating $branch"
      git checkout $branch
      git pull --rebase origin $branch
      echo "rename app.yaml"
      cp app.yaml app.copy.yaml
      version=$(echo $branch | sed 's/\//-/g')
      sed "s/version: auto-set-by-branchname/version: $version/g" app.copy.yaml > app.yaml
      appcfg.py --oauth2 update .
      rm -f app.yaml
      mv app.copy.yaml app.yaml
    done
    cd ../..
  done
  echo "Sleeping for 3 minutes"
  sleep 180
done