https://github.com/uu59/rbl

rbswitch

#!/bin/sh

usage () {
  cat <<"EOF" >&2
rbswitch 

Usage:
  rbswitch help
  rbswitch use <version>
  rbswitch versions
  rbswitch build (required ruby-build)
  (rbswitch install)
  (rbswitch update)

Example:
  rbswitch use 2.0.0-p0
  rbswitch versions

How to use:
  export PATH="/path/to/rbswitch/current/bin:$PATH"
EOF
  exit 1
}

error () {
  echo $* >&2
  exit 1
}

rbswitch_url="" # TODO: should be decided
: ${RBSWITCH_DIR:="$HOME/.rbswitch"}
: ${RBSWITCH_VERSIONS:="$HOME/.rbenv/versions"}
: ${RUBYBUILD:="ruby-build"}

mkdir -p $RBSWITCH_DIR
cp $(cd $(dirname ${BASH_SOURCE:-$0}); pwd)/rbswitch $RBSWITCH_DIR/

case "$1" in
  use)
    if [ -z "$2" ];then
      error "Ruby version required."
    fi
    if [ ! -d "$RBSWITCH_VERSIONS/$2" ]; then
      error "$RBSWITCH_VERSIONS/$2 not exists."
    fi
    rm $RBSWITCH_DIR/current
    ln -sf $RBSWITCH_VERSIONS/$2 $RBSWITCH_DIR/current
    ln -sf $RBSWITCH_DIR/rbswitch $RBSWITCH_DIR/current/bin
    ;;

  versions)
    echo $RBSWITCH_VERSIONS/* | xargs -n1 basename
    ;;

  build)
    $RUBYBUILD $2 $RBSWITCH_VERSIONS/$2
    ;;

  install)
    curl -Lo $RBSWITCH_DIR/rbswitch $rbswitch_url
    ;;

  update)
    curl -Lo $RBSWITCH_DIR/rbswitch $rbswitch_url
    ;;

  *)
    usage
    ;;
esac