thoughtbot--shoulda-matchers/script/install_gems_in_all_appraisals

#!/bin/bash

SUPPORTED_VERSIONS=$(<script/SUPPORTED_VERSIONS)

install-gems-for-version() {
  local version="$1"
  (export RBENV_VERSION=$version; bundle && bundle exec appraisal install)
}

for version in $SUPPORTED_VERSIONS; do
  echo
  echo "*** Installing gems for $version ***"
  install-gems-for-version $version
done