Execute the same command in each installed ruby via rbenv

rbenv-each.sh

#!/bin/bash

verbose=0

function usage() {
  echo >&2 "Usage: rbenv each [-v] ..."
  echo >&2 "       -v Verbose mode. Prints a header for each ruby."
}
while getopts vh option
do	case "$option" in
	v)	verbose=1;;
  h) usage; exit 0;;
	[?])
    usage;
		exit 1;;
	esac
done
shift $(($OPTIND-1))

failed_rubies=""

for ruby in `rbenv versions --bare`; do
  if [ $verbose = 1 ]; then
    echo -e "\033[1;34m[$ruby]:\033[0m \033[1;32m$@\033[0m";
    echo -e "\033[1;34m******************************************************************\033[0m";
  fi
  RBENV_VERSION=$ruby $@
  if [ $verbose = 1 ]; then
    echo
  fi
  if [ $? != 0 ]; then
    failed_rubies="$failed_rubies $ruby"
  fi
done

if [ -n "$failed_rubies" ]; then
  echo -e "\033[1;31mFAILED IN:$failed_rubies\033[0m"
fi

shell_example.txt

$ rbenv each bundle install

$ rbenv each -v rake test

See: https://github.com/chriseppstein/rbenv-each to install as a plugin.