install_scenarios.feature

Scenario 1: happy path
  git clone is successful
  npm install is successful
  restart zazu

  next:

  no action - be fast!

Scenario 2: git clone fails
  git clone fails 3 times
  npm install never happens
  restart zazu

  next:

  retry git clone and npm install

Scenario 3: npm install fails
  git clone success
  npm install fails 3 times
  restart zazu

  next:

  retry npm install

Scenario 4: update plugin

  git clone is successful
  npm install is successful
  update plugins
    git pull
    npm install

pseudo.txt

original clone / every zazu open
  if "calculator"
    if "calculator" : "installed"
      promise.resolve('exists')
    else
      promise.resolve('downloaded')
  else
    cleanup and try 3 times
    if successful
      write "calculator" : "cloned"
      promise.resolve('downloaded')
    else
      write to log
      promise.reject('meow')

npm install
  try 3 times
  if successful
    write "calculator" : "installed"
    promise.resolve()
  else
    write to log
    promise.reject()