gemfile-exec

#!/bin/bash

# Examples:
#
#     gemfile-exec -c "rake spec" gemfiles/rails4.2.gemfile
#     gemfile-exec -c "rake spec" gemfiles/*.gemfile

function usage() {
  echo "Usage: gemfile-exec -c <command> gemfile ..."
  echo "       gemfile-exec gemfile ..."
}

command=rake

while getopts ":c:h" opt; do
  case $opt in
    c)
      command=$OPTARG
      ;;
    h)
      usage
      exit 0
      ;;
    \?)
      echo "Invalid option: -$OPTARG" >&2
      usage
      exit 1
      ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit 1
      ;;
  esac
done

# getopts is done; shift all processed options away
shift $((OPTIND-1))

if [[ $# -eq 0 ]] ; then
  usage
  exit 1
fi

GREEN='\033[0;32m'
NC='\033[0m' # No Color

for gemfile in "$@"
do
  echo
  echo -e "${GREEN}BUNDLE_GEMFILE=$gemfile   bundle exec ${command}${NC}"
  echo -e "${GREEN}----------------------------------------------------------------------${NC}"
  echo
  export BUNDLE_GEMFILE="$gemfile"
  bundle check || bundle install --path vendor
  bundle exec ${command}
done