selector

#!/usr/bin/env bash

# __rvm_select implementation version patch_level
__rvm_select()
{
  true ${rvm_gemset_name:=}
  typeset _original_env_string
  _original_env_string=${rvm_env_string}

  # Set Variable Defaults
  export GEM_HOME GEM_PATH MY_RUBY_HOME RUBY_VERSION IRBRC
  export rvm_env_string rvm_action rvm_alias_expanded rvm_archive_extension rvm_bin_flag rvm_bin_path rvm_configure_flags rvm_debug_flag rvm_default_flag rvm_delete_flag rvm_docs_type rvm_dump_environment_flag rvm_error_message rvm_expanding_aliases rvm_file_name rvm_gemdir_flag rvm_gemset_name rvm_gemstone_package_file rvm_gemstone_url rvm_head_flag rvm_hook rvm_install_args rvm_install_on_use_flag rvm_llvm_flag rvm_loaded_flag rvm_make_flags rvm_niceness rvm_nightly_flag rvm_only_path_flag rvm_parse_break rvm_patch_names rvm_patch_original_pwd rvm_pretty_print_flag rvm_proxy rvm_quiet_flag rvm_ree_options rvm_reload_flag rvm_remove_flag rvm_ruby_alias rvm_ruby_aliases rvm_ruby_args rvm_ruby_binary rvm_ruby_bits rvm_ruby_configure rvm_ruby_file rvm_ruby_gem_home rvm_ruby_gem_path rvm_ruby_global_gems_path rvm_ruby_home rvm_ruby_interpreter rvm_ruby_irbrc rvm_ruby_load_path rvm_ruby_major_version rvm_ruby_make rvm_ruby_make_install rvm_ruby_minor_version rvm_ruby_mode rvm_ruby_name rvm_ruby_package_file rvm_ruby_package_name rvm_ruby_patch rvm_ruby_patch_level rvm_ruby_release_version rvm_ruby_repo_url rvm_ruby_require rvm_ruby_revision rvm_ruby_selected_flag rvm_ruby_sha rvm_ruby_string rvm_ruby_strings rvm_ruby_tag rvm_ruby_url rvm_ruby_user_tag rvm_ruby_version rvm_script_name rvm_sdk rvm_silent_flag rvm_sticky_flag rvm_system_flag rvm_token rvm_trace_flag rvm_use_flag rvm_user_flag rvm_verbose_flag rvm_wrapper_name rvm_architectures

  if [[ -z "${rvm_ruby_string:-}" ]]
  then # First we build rvm_ruby_string from components if it is empty.
    if [[ -n "${rvm_ruby_interpreter:-}" ]]
    then
      rvm_ruby_string="$rvm_ruby_interpreter"
    fi
    if [[ -n "${rvm_ruby_version:-}" ]]
    then
      rvm_ruby_string="$rvm_ruby_string-$rvm_ruby_version"
    fi
    if [[ -n "${rvm_ruby_patch_level:-}" ]]
    then
      rvm_ruby_string="$rvm_ruby_string-$rvm_ruby_patch_level"
    fi
    if [[ -n "${rvm_ruby_revision:-}" ]]
    then
      rvm_ruby_string="$rvm_ruby_string-$rvm_ruby_revision"
    fi
    if [[ -n "${rvm_ruby_name:-}" ]]
    then
      rvm_ruby_name="$rvm_ruby_string-$rvm_ruby_name"
    fi
  fi

  __rvm_ruby_string || return $?

  rvm_archive_extension="tar.gz"

  if [[ -z "${rvm_ruby_interpreter:-}" ]]
  then
    rvm_ruby_interpreter="${rvm_ruby_string//-*/}"
  fi

  case "$rvm_ruby_interpreter" in
    macruby)
      if [[ "Darwin" == "$(uname)" ]]
      then
        rvm_ruby_package_name="${rvm_ruby_interpreter}-${rvm_ruby_version}"
        if (( ${rvm_head_flag:=0} == 1 ))
        then
          rvm_ruby_version="" ; rvm_ruby_tag=""
          rvm_ruby_revision="head"
          __rvm_db "macruby_repo_url" "rvm_ruby_repo_url"
          rvm_ruby_url="$rvm_ruby_repo_url"

        elif [[ "nightly" == "${rvm_ruby_version:-}" ]]
        then
          __rvm_db "macruby_nightly_url" "rvm_ruby_url"
          rvm_ruby_package_name="${rvm_ruby_interpreter}_nightly-${rvm_ruby_version}"
          rvm_ruby_package_file="$rvm_ruby_package_name"

        elif [[ -n "${rvm_ruby_version:-}" ]]
        then
          __rvm_db "macruby_url" "rvm_ruby_url"
          rvm_ruby_package_name="MacRuby%20${rvm_ruby_version}.zip"
          rvm_ruby_package_file="$rvm_ruby_package_name"
          rvm_ruby_url="$rvm_ruby_url/$rvm_ruby_package_name"

        else
          __rvm_db "macruby_version" "rvm_ruby_version"
          __rvm_db "macruby_url" "rvm_ruby_url"
          rvm_ruby_package_name="MacRuby%20${rvm_ruby_version}.zip"
          rvm_ruby_package_file="$rvm_ruby_package_name"
          rvm_ruby_url="$rvm_ruby_url/$rvm_ruby_package_name"
        fi
        rvm_ruby_patch_level=""
      else
        rvm_error "MacRuby can only be installed on a Darwin OS."
      fi
      ;;

    rbx|rubinius)
      rvm_archive_extension="tar.gz"
      rvm_ruby_interpreter="rbx"
      rvm_ruby_version=${rvm_ruby_version:-$(__rvm_db "rbx_version")}
      rvm_ruby_repo_url=${rvm_rbx_repo_url:-$(__rvm_db "rubinius_repo_url")}
      rbx_url=${rbx_url:-$(__rvm_db "rbx_url")}
      rvm_ruby_patch_level=""

      case "${rvm_ruby_version}" in
        (2.0pre)
          rvm_ruby_repo_branch="master" ;;
        (2.0.testing)
          rvm_ruby_repo_branch="${rvm_ruby_version}" ;;
      esac

      if (( ${rvm_head_flag:=0} == 0 ))
      then
        rvm_ruby_url="${rbx_url}"
        rvm_ruby_package_file="rubinius-${rvm_ruby_version}.${rvm_archive_extension}"
        rvm_ruby_url="$rvm_ruby_url/$rvm_ruby_package_file"
      else
        rvm_ruby_version="head"
      fi

      if [[ -n "${rvm_rbx_opt:-}" ]]
      then
        export RBXOPT="${RBXOPT:=${rvm_rbx_opt}}"
      fi
      ;;

    jruby)
      rvm_ruby_patch_level=""

      if (( ${rvm_head_flag:=0} == 1 ))
      then
        rvm_ruby_version="head"
        rvm_ruby_repo_url="${rvm_ruby_repo_url:-$(__rvm_db "jruby_repo_url")}"
        rvm_ruby_url="${rvm_ruby_repo_url:-$(__rvm_db "jruby_repo_url")}"
      elif [[ ${rvm_18_flag:-0} == 1 || ${rvm_19_flag:-0} == 1 ]]
      then
        rvm_ruby_repo_url="${rvm_ruby_repo_url:-$(__rvm_db "jruby_repo_url")}"
        rvm_ruby_url="${rvm_ruby_repo_url:-$(__rvm_db "jruby_repo_url")}"
        rvm_ruby_version="${rvm_ruby_version:-"$(__rvm_db "jruby_version")"}"
        rvm_ruby_tag="${rvm_ruby_tag:-${rvm_ruby_version}}"
      else
        rvm_archive_extension="tar.gz"
        rvm_ruby_version="${rvm_ruby_version:-"$(__rvm_db "jruby_version")"}"
        jruby_url="$(__rvm_db "jruby_url")"
        rvm_ruby_package_file="${rvm_ruby_interpreter}-bin-${rvm_ruby_version}"
        rvm_ruby_package_name="${rvm_ruby_interpreter}-${rvm_ruby_version}"
        rvm_ruby_url="${jruby_url}/${rvm_ruby_version}/${rvm_ruby_package_file}.tar.gz"
        jruby_url=""
      fi

      alias jruby_ng="jruby --ng"
      alias jruby_ng_server="jruby --ng-server"
      ;;

    maglev)
      rvm_ruby_patch_level=""
      maglev_url="$(__rvm_db "maglev_url")"

      system="$(uname -s)"
      if [[ "$MACHTYPE" == x86_64-apple-darwin* ]]
      then
        arch="i386" # Anyone else hear circus musik? ;)
      else
        arch="$(uname -m)"
      fi

      if (( ${rvm_head_flag:=0} == 1 )) || [[ "$rvm_ruby_version" == "head" ]]
      then
        rvm_head_flag=1
        rvm_ruby_version="head"
        rvm_ruby_repo_url="${rvm_ruby_repo_url:-$(__rvm_db "maglev_repo_url")}"
        rvm_ruby_url="${rvm_ruby_repo_url:-$(__rvm_db "maglev_repo_url")}"
        rvm_gemstone_version=$(
          command curl -s https://raw.github.com/MagLev/maglev/master/version.txt |
            GREP_OPTIONS="" \grep ^GEMSTONE | cut -f2 -d-
        )
        rvm_gemstone_package_file="GemStone-${rvm_gemstone_version}.${system}-${arch}"
      else
        rvm_ruby_package_file="MagLev-${rvm_ruby_version}" # removed from 1.0: .${system}-${arch}
        rvm_ruby_version="${rvm_ruby_version:-"$(__rvm_db "maglev_version")"}"
        rvm_ruby_package_name="${rvm_ruby_interpreter}-${rvm_ruby_version}"
        rvm_ruby_url="${rvm_ruby_url:-"$maglev_url/${rvm_ruby_package_file}.${rvm_archive_extension}"}"
        rvm_gemstone_version=$(
          version_tag_commit=$(
            command curl -s http://github.com/api/v2/yaml/repos/show/MagLev/maglev/tags |
              awk '/MagLev-'${rvm_ruby_version}':/ {print $2 }'
          )
          command curl -s https://raw.github.com/MagLev/maglev/$version_tag_commit/version.txt |
            GREP_OPTIONS="" \grep ^GEMSTONE | cut -f2 -d-
        )
        rvm_gemstone_package_file="GemStone-${rvm_gemstone_version}.${system}-${arch}"
        export MAGLEV_HOME="$rvm_rubies_path/$rvm_ruby_string"
      fi

      rvm_gemstone_url="$maglev_url/${rvm_gemstone_package_file}.${rvm_archive_extension}"
      ;;

    ironruby)
      rvm_ruby_patch_level=""

      if (( ${rvm_head_flag:=0} == 1 ))
      then
        rvm_ruby_version="head"
        rvm_ruby_package_name="${rvm_ruby_string}"
        rvm_ruby_repo_url="${rvm_ruby_repo_url:-$(__rvm_db "ironruby_repo_url")}"
        rvm_ruby_url="${rvm_ruby_repo_url:-$(__rvm_db "ironruby_repo_url")}"

      else
        rvm_archive_extension="zip"
        rvm_ruby_version=${rvm_ruby_version:-"$(__rvm_db "ironruby_version")"}
        rvm_ruby_package_name="${rvm_ruby_interpreter}-${rvm_ruby_version}"
        rvm_ruby_package_file="${rvm_ruby_interpreter}-${rvm_ruby_version}.${rvm_archive_extension}"
        rvm_ruby_url="$(__rvm_db "ironruby_${rvm_ruby_version}_url")${rvm_ruby_package_file}"
      fi

      export rvm_ruby_version rvm_ruby_string rvm_ruby_package_name rvm_ruby_repo_url rvm_ruby_url rvm_archive_extension
      ;;

    ree)
      rvm_ruby_interpreter=ree
      rvm_ruby_version=${rvm_ruby_version:-"$(__rvm_db "ree_version")"}

      case "$rvm_ruby_version" in
        1.8.*) true ;; # all good!
        *) rvm_error "Unknown Ruby Enterprise Edition version: $rvm_ruby_version" ;;
      esac

      if [[ -n "${rvm_ruby_patch_level:-0}" ]]
      then
        rvm_ruby_patch_level="$(echo $rvm_ruby_patch_level | \sed 's#^p##')"
      fi

      rvm_ruby_package_file="ruby-enterprise-$rvm_ruby_version-$rvm_ruby_patch_level"
      rvm_ruby_url="$(__rvm_db "${rvm_ruby_interpreter}_${rvm_ruby_version}_${rvm_ruby_patch_level}_url")"
      rvm_ruby_url="${rvm_ruby_url:-$(__rvm_db "${rvm_ruby_interpreter}_${rvm_ruby_version}_url")}"
      rvm_ruby_url="${rvm_ruby_url}/$rvm_ruby_package_file.tar.gz"
      ;;

    kiji)
      rvm_ruby_interpreter="kiji"
      rvm_ruby_version="head"
      rvm_head_flag=1
      rvm_ruby_string="kiji-head"
      rvm_ruby_patch_level=""
      rvm_ruby_repo_url=${rvm_mput_repo_url:-"$(__rvm_db "kiji_repo_url")"}
      rvm_ruby_url=$rvm_ruby_repo_url
      rvm_ruby_configure="" ; rvm_ruby_make="" ; rvm_ruby_make_install=""
      ;;

    goruby)
      rvm_ruby_interpreter="goruby"
      rvm_ruby_version="head"
      rvm_ruby_string="goruby"
      rvm_ruby_patch_level=""
      rvm_ruby_repo_url=${rvm_mput_repo_url:-"$(__rvm_db "goruby_repo_url")"}
      rvm_ruby_url=$rvm_ruby_repo_url
      rvm_ruby_configure="" ; rvm_ruby_make="" ; rvm_ruby_make_install=""
      ;;

    tcs)
      rvm_ruby_interpreter="tcs"
      rvm_ruby_version="head"
      rvm_ruby_string="tcs"
      rvm_ruby_patch_level=""
      rvm_ruby_repo_url=${rvm_tcs_repo_url:-"$(__rvm_db "tcs_repo_url")"}
      rvm_ruby_url=$rvm_ruby_repo_url
      rvm_ruby_repo_branch="${rvm_ruby_repo_branch:-"$(__rvm_db "tcs_repo_branch")"}"
      export rvm_head_flag=1
      rvm_ruby_configure="" ; rvm_ruby_make="" ; rvm_ruby_make_install=""
      ;;

    ruby)
      if [[ -n "${rvm_ruby_patch_level}" ]]
      then
        rvm_ruby_package_file="${rvm_ruby_interpreter}-${rvm_ruby_version}-${rvm_ruby_patch_level}"
        rvm_ruby_package_name="${rvm_ruby_interpreter}-${rvm_ruby_version}-${rvm_ruby_patch_level}"
      else
        rvm_ruby_package_file="${rvm_ruby_interpreter}-${rvm_ruby_version}"
        rvm_ruby_package_name="${rvm_ruby_interpreter}-${rvm_ruby_version}"
      fi

      if [[ -z "${rvm_ruby_version:-""}" ]] && (( ${rvm_head_flag:=0} == 0 ))
      then
        rvm_error "Ruby version was not specified!"
      else
        rvm_ruby_repo_url="${rvm_ruby_repo_url:-"$(__rvm_db "ruby_repo_url")"}"
        if (( ${rvm_head_flag:=0} == 0 ))
        then
          case "${rvm_ruby_version}" in
            (1.8.4)
              rvm_archive_extension="tar.gz"
              ;;
            (*)
              rvm_archive_extension="tar.bz2"
              ;;
          esac
        fi
      fi
      ;;

    ext)
      if [[ -z "${rvm_ruby_name:-${detected_rvm_ruby_name:-}}" ]]
      then
        rvm_error "External ruby name was not specified!"
      fi
      ;;

    current)
      ruby_binary="$(builtin command -v ruby)"

      if (( $? == 0)) && match "$ruby_binary" "*rvm*"
      then
        rvm_ruby_string="$(dirname "$ruby_binary" | xargs dirname | xargs basename)"
      else
        rvm_ruby_interpreter="system"
      fi
      ;;

    default|system|user)
      # no-op?
      ;;

    *)
      if [[ -n "${MY_RUBY_HOME:-""}" ]]
      then
        rvm_ruby_string=$(basename $MY_RUBY_HOME)
        __rvm_select
      else
        if [[ -z "${rvm_ruby_string:-""}" ]]
        then
          rvm_error "Ruby implementation '$rvm_ruby_interpreter' is not known."
          return 1
        fi
      fi
  esac

  if [[ -n "$rvm_ruby_version" ]]
  then
    case "$rvm_ruby_version" in
      (+([[:digit:]]).+([[:digit:]]).+([[:digit:]]))
        rvm_ruby_release_version="${rvm_ruby_version/.*/}"
        rvm_ruby_major_version=${rvm_ruby_version%.*} ; rvm_ruby_major_version=${rvm_ruby_major_version#*.}
        rvm_ruby_minor_version="${rvm_ruby_version//*.}"
        ;;
      (+([[:digit:]]).+([[:digit:]]))
        rvm_ruby_release_version="${rvm_ruby_version/.*/}"
        rvm_ruby_major_version="${rvm_ruby_version#*.}"
        rvm_ruby_minor_version=""
        ;;
    esac
  fi

  if [[ "${rvm_ruby_interpreter}" == ext ]]
  then
    rvm_ruby_home="$rvm_externals_path/$rvm_ruby_string"
    rvm_ruby_irbrc="$rvm_ruby_home/.irbrc"
    rvm_ruby_binary="$( readlink $rvm_ruby_home/bin/ruby )"
  else
    rvm_ruby_package_name="${rvm_ruby_package_name:-${rvm_ruby_string//-n*}}"
    rvm_ruby_home="$rvm_rubies_path/$rvm_ruby_string"
    rvm_ruby_irbrc="$rvm_ruby_home/.irbrc"
    rvm_ruby_binary="$rvm_ruby_home/bin/ruby"
  fi

  # TODO is this right place to do this ?
  if [[ "maglev" == "$rvm_ruby_interpreter" ]]
  then
    export MAGLEV_HOME="$rvm_ruby_home"
    export GEMSTONE_GLOBAL_DIR=$MAGLEV_HOME
  fi

  __rvm_gemset_select
  case $? in
    1|3|4)
      return 1
      ;;
  esac

  rvm_ruby_selected_flag=1

  if [[ -d "${rvm_log_path}/$rvm_ruby_string" ]]
  then
    \mkdir -p "${rvm_log_path}/$rvm_ruby_string"
  fi

  rvm_ruby_interpreter="${rvm_ruby_interpreter:-system}"
}

__rvm_use_system() {

  unset GEM_HOME GEM_PATH MY_RUBY_HOME RUBY_VERSION IRBRC

  new_path="$(__rvm_remove_rvm_from_path ; printf "%b" "$PATH"):${rvm_bin_path}"

  if [[ -s "$rvm_path/config/system" ]]
  then
    GREP_OPTIONS="" \grep "MY_RUBY_HOME='$rvm_rubies_path" "$rvm_path/config/system" > /dev/null

    if (( $? == 0 ))
    then
      # 'system' should *not* point to an rvm ruby.
      if [[ -f "$rvm_path/config/system" ]]
      then
        \rm -f "$rvm_path/config/system"
      fi
    else
      source "$rvm_path/config/system"
    fi
  fi

  if (( ${rvm_default_flag:=0} == 1 ))
  then
    "$rvm_scripts_path/alias" delete default &> /dev/null

    \find "${rvm_bin_path}" -maxdepth 0 -name 'default_*' -delete
    \rm -f "$rvm_path/config/default"
    \rm -f "$rvm_environments_path/default"
    __rvm_rm_rf "$rvm_wrappers_path/default"
  fi

  # Check binaries, remove under the condition they're symlinks.
  if (( ${rvm_user_install_flag:=0} == 0 ))
  then
    for binary in ruby gem irb ri rdoc rake erb testrb
    do
      full_binary_path="${rvm_bin_path}/$binary"
      if [[ -L "$full_binary_path" ]]
      then
        \rm -f "$full_binary_path"
      fi
    done
  fi

  if (( ${rvm_verbose_flag:=0} == 1 ))
  then
    rvm_log "Now using system ruby."
  fi

  __rvm_remove_rvm_from_path

  new_path="$PATH:${rvm_bin_path}"

  export rvm_ruby_string="system"
}

__rvm_use()
{
  typeset new_path binary full_binary_path rvm_ruby_gem_home

  __rvm_select "$@" || return $?

  if [[ "system" == ${rvm_ruby_interpreter:="system"} ]]
  then
    __rvm_use_system
  else
    if [[ ! -d "$rvm_ruby_home" ]]
    then
      if [[ ${rvm_install_on_use_flag:-0} -eq 1 ]]
      then
        rvm_warn "$rvm_ruby_string is not installed."
        "$rvm_scripts_path/manage" "install" "$rvm_ruby_string"
      else
        rvm_error "$rvm_ruby_string is not installed."
        rvm_log "To install do: 'rvm install $rvm_ruby_string'"
        return 1
      fi
    fi

    if [[ ! -d "$rvm_ruby_gem_home" || -n "${rvm_expected_gemset_name}" ]]
    then
      if (( ${rvm_gemset_create_on_use_flag:=0} == 1 || ${rvm_create_flag:=0} == 1 ))
      then
        rvm_warn "gemset $rvm_gemset_name is not existing, creating."
        "$rvm_scripts_path/gemsets" create "$rvm_gemset_name"
      else
        rvm_error "Gemset '${rvm_expected_gemset_name}' does not exist, 'rvm gemset create ${rvm_expected_gemset_name}' first, or append '--create'."
        return 2
      fi
    fi

    export GEM_HOME GEM_PATH MY_RUBY_HOME RUBY_VERSION IRBRC
    GEM_HOME="$rvm_ruby_gem_home"
    GEM_PATH="$rvm_ruby_gem_path"
    MY_RUBY_HOME="$rvm_ruby_home"
    RUBY_VERSION="$rvm_ruby_string"
    IRBRC="$rvm_ruby_irbrc"
    unset BUNDLE_PATH # Ensure that BUNDLE_PATH is not set!

    # Handle MagLev pre-installed gems
    if [[ "maglev" == "$rvm_ruby_interpreter" ]]
    then
      GEM_PATH="$GEM_PATH:$MAGLEV_HOME/lib/maglev/gems/1.8/"
    fi

    [[ -n "${IRBRC:-}" ]] || unset IRBRC

    # Ensure the environment file for the selected ruby exists.
    __rvm_ensure_has_environment_files

    if (( ${rvm_verbose_flag:=0} == 1 ))
    then
      rvm_log "Using ${GEM_HOME/${rvm_gemset_separator:-'@'}/ with gemset }"
    fi

    if [[ "$GEM_HOME" != "$rvm_ruby_global_gems_path" ]]
    then
      new_path="$GEM_HOME/bin:$rvm_ruby_global_gems_path/bin:$MY_RUBY_HOME/bin:${rvm_bin_path}:$(__rvm_remove_rvm_from_path ;printf "%b" "$PATH")"
    else
      new_path="$GEM_HOME/bin:$MY_RUBY_HOME/bin:${rvm_bin_path}:$(__rvm_remove_rvm_from_path ;printf "%b" "$PATH")"
    fi
  fi

  [[ -z "${rvm_ruby_string:-}" ]] || export rvm_ruby_string
  [[ -z "${rvm_gemset_name:-}" ]] || export rvm_gemset_name

  if [[ -n "$new_path" ]]
  then
    export PATH="$new_path"
    unset new_path
    builtin hash -r
  fi

  if [[ "$rvm_ruby_string" != "system" ]]
  then
    case "${rvm_rvmrc_flag:-0}" in
      (rvmrc|versions_conf|ruby_version)
        __rvm_set_${rvm_rvmrc_flag}
        ;;
    esac

    typeset environment_id
    environment_id="$(__rvm_env_string)"

    if (( ${rvm_default_flag:=0} == 1 )) &&
      [[ "default" != "${rvm_ruby_interpreter:-}" ]] &&
      [[ "system"  != "${rvm_ruby_interpreter:-}" ]]
    then
      # Switch the default alias to the new environment id
      "$rvm_scripts_path/alias" delete default &> /dev/null
      "$rvm_scripts_path/alias" create default "$environment_id" >& /dev/null
    fi

    rvm_default_flag=0

    if [[ -n "${rvm_wrapper_name:-}" ]]
    then
      "$rvm_scripts_path/wrapper" "$environment_id" "$rvm_wrapper_name" > /dev/null 2>&1
      rvm_wrapper_name=""
    fi

    if [[ -n "${rvm_ruby_alias:-}" ]]
    then
      rvm_log "Attempting to alias $environment_id to $rvm_ruby_alias"
      "$rvm_scripts_path/alias" delete "$rvm_ruby_alias" > /dev/null 2>&1
      rvm_alias_expanded=1 "$rvm_scripts_path/alias" create "$rvm_ruby_alias" "$environment_id" > /dev/null 2>&1
      ruby_alias="" ; rvm_ruby_alias=""
    fi

    if [[ "maglev" == "${rvm_ruby_interpreter:-""}" ]]
    then
      export MAGLEV_HOME="$rvm_ruby_home"
      export GEMSTONE_GLOBAL_DIR=$MAGLEV_HOME

      if [[ -x "$MAGLEV_HOME/gemstone/bin/gslist" ]]
      then
        "$MAGLEV_HOME/gemstone/bin/gslist" -clv > /dev/null 2>&1 ; result=$?
        if (( result == 1 ))
        then
          "$rvm_ruby_home/bin/maglev" start
        fi
      fi
    fi
  else
    if (( ${rvm_default_flag:=0} == 1 ))
    then
      if ! builtin command -v __rvm_reset >> /dev/null 2>&1
      then
        source "$rvm_scripts_path/functions/reset"
        __rvm_reset
      fi
    fi
  fi
  rvm_hook="after_use"
  source "$rvm_scripts_path/hook"
  return 0
}

__rvm_ruby_string()
{
  # rvm_ruby_string may designate any of the following items:
  # * rvm_gemset_name
  # * rvm_ruby_interpreter
  # * rvm_ruby_version
  # * rvm_ruby_patch_level
  # * rvm_ruby_revision
  # * rvm_ruby_tag

  typeset ruby_string gemset_name expanded_alias_name repo_url branch_name ruby_name

  __rvm_default_flags

  rvm_expanding_aliases=

  true \
    "${rvm_ruby_version:=}" "${rvm_gemset_name:=}" "${rvm_ruby_interpreter:=}"\
    "${rvm_ruby_version:=}" "${rvm_ruby_tag:=}" "${rvm_ruby_patch_level:=}"\
    "${rvm_ruby_revision:=}" ${rvm_gemset_separator:="@"} "${rvm_ruby_string:=}"\
    ${rvm_expanding_aliases:=0} ${rvm_head_flag:=0}

  if echo "$rvm_ruby_string" | GREP_OPTIONS="" \grep "${rvm_gemset_separator}" >/dev/null 2>&1
  then
    rvm_gemset_name="${rvm_ruby_string/*${rvm_gemset_separator}/}"
    rvm_ruby_string="${rvm_ruby_string/${rvm_gemset_separator}*/}"
  fi

  # Alias'd rubies
  if (( rvm_expanding_aliases == 0 )) &&
    [[ -n "${rvm_ruby_string}" && "$rvm_ruby_string" != "system" ]]
  then
    if expanded_alias_name="$("$rvm_scripts_path/alias" show "$rvm_ruby_string" 2>/dev/null)" \
      && [[ -n "$expanded_alias_name" ]]
  then
    rvm_ruby_string="$expanded_alias_name"
  elif [[ "$rvm_ruby_string" == default ]]
  then
    # Default is not a known value. Instead, we need to therefore set it to system.
    rvm_ruby_string="system"
  fi
  fi

  if echo "$rvm_ruby_string" | GREP_OPTIONS="" \grep "${rvm_gemset_separator}" >/dev/null 2>&1 ; then
    rvm_gemset_name="${rvm_ruby_string/*${rvm_gemset_separator}/}"
    rvm_ruby_string="${rvm_ruby_string/${rvm_gemset_separator}*/}"
  fi

  # Stash the ruby string.
  ruby_string="${rvm_ruby_string:-}"
  gemset_name="${rvm_gemset_name:-}"
  repo_url="${rvm_ruby_repo_url:-}"
  branch_name="${rvm_ruby_repo_branch:-}"
  ruby_name="${rvm_ruby_name:-}"

  __rvm_unset_ruby_variables

  rvm_ruby_repo_url="${repo_url:-}"
  rvm_ruby_repo_branch="${branch_name:-}"
  rvm_ruby_name="$ruby_name"

  if [[ -n "$gemset_name" ]]
  then
    rvm_gemset_name="$gemset_name"
    rvm_sticky_flag=1 # <- not sold on this.
  fi

  strings=($(echo ${ruby_string//-/ }))

  if (( ${#strings[@]} == 0 ))
  then
    if echo "${GEM_HOME:-}" | GREP_OPTIONS="" \grep "${rvm_path}" >/dev/null 2>&1
    then
      # Current Ruby
      strings="${GEM_HOME##*\/}"
      strings="${strings/%${rvm_gemset_separator:-"@"}*}"
      rvm_ruby_string="$strings"
      strings=( $(echo ${rvm_ruby_string//-/ }) )
    else
      strings=(system)
      rvm_ruby_string="system"
    fi
  fi

  for string in ${strings[@]}
  do
    case "$string" in
      (head)
        rvm_ruby_patch_level=""
        rvm_ruby_revision=""
        rvm_ruby_tag=""
        export rvm_head_flag=1
        ;;

      (system)
        rvm_ruby_interpreter="system"
        rvm_ruby_patch_level=""
        rvm_ruby_tag=""
        rvm_ruby_revision=""
        rvm_ruby_version=""
        rvm_gemset_name=""
        rvm_head_flag=0
        return 0
        ;;

      (ext|external)
        rvm_ruby_interpreter="ext"
        rvm_ruby_patch_level=""
        rvm_ruby_tag=""
        rvm_ruby_revision=""
        rvm_ruby_version=""
        rvm_head_flag=0

        unset strings[__array_start]
        strings=( ${strings[@]} )
        strings="${strings[*]}"
        rvm_ruby_name="${strings// /-}"
        break
        ;;

      (nightly)
        rvm_ruby_version="nightly"
        rvm_nightly_flag=1
        break
        ;;

      (preview*)
        rvm_ruby_patch_level="$string"
        ;;

      (rc[[:digit:]]*)
        rvm_ruby_patch_level="$string"
        ;;

      ([[:digit:]].[[:digit:]]*)
        #TODO: use normal code for rbx!
        if [[ "${rvm_ruby_interpreter}" == "rbx" ]]
        then
          if [[ -z "${rvm_ruby_version}" ]]
          then
            rvm_ruby_version="${string}"
          elif [[ -z "${rvm_ruby_patch_level}" ]]
          then
            rvm_ruby_patch_level="${string}"
          else
            rvm_error "Unknown ruby interpreter string component: '$string'."
            return 1
          fi
        else
          case "$string" in
            (0.+([[:digit:]])|0.+([[:digit:]]).+([[:digit:]])|1.+([[:digit:]]).+([[:digit:]])|2.+([[:digit:]]).+([[:digit:]])|1.+([[:digit:]]).+([[:digit:]]).+([[:digit:]])|1.+([[:digit:]]))
              rvm_ruby_version="$string"
              rvm_ruby_revision=""
              rvm_ruby_tag=""
              ;;

            (1.+([[:digit:]]).+([[:digit:]]).+([[:alnum:]]))
              case "${rvm_ruby_interpreter:-""}" in
                (jruby)
                  rvm_ruby_version="$string"
                  ;;
                (*)
                  rvm_error "Unknown ruby interpreter version: '$string'."
                  return 1
                  ;;
              esac
              ;;

            (*)
              rvm_error "Unknown ruby interpreter version: '$string'."
              return 1
              ;;
          esac
        fi
        ;;

      (p[[:digit:]]*)
        rvm_ruby_patch_level="$string"
        ;;

      ([[:digit:]][[:digit:]]*)

        case "${rvm_ruby_interpreter:-""}" in
          (ree)
            rvm_ruby_patch_level="$string"
            rvm_ruby_revision=""
            ;;

          (kiji)
            rvm_ruby_patch_level="$string"
            rvm_ruby_revision=""
            ;;

          (rbx)
            rvm_ruby_patch_level="$string"
            ;;

          (maglev)
            rvm_ruby_version="$string"
            rvm_ruby_revision=""
            rvm_ruby_patch_level=""
            ;;

          (*)
            rvm_ruby_revision="r$string"
            ;;
        esac
        ;;

      (r[[:digit:]]*)
        rvm_ruby_patch_level=""
        rvm_ruby_revision="$string"
        ;;

      (s[[:alnum:]]*)
        rvm_ruby_revision=""
        rvm_ruby_sha="${string#s}"
        ;;

      (tv[[:digit:]]*|t[[:digit:]]*)
        rvm_ruby_patch_level="" ; rvm_ruby_revision=""
        rvm_ruby_tag="$string"
        ;;

      (m[[:digit:]]*)
        rvm_ruby_mode="$string"
        ;;

      (u[[:alnum:]]*)
        rvm_ruby_patch_level="" ; rvm_ruby_revision="" ; rvm_ruby_tag="" ; rvm_ruby_patch=""
        rvm_ruby_user_tag="$string"
        ;;

      (a[[:digit:]][[:digit:]]*)
        rvm_ruby_bits="$string" # Architecture
        ;;

      (b[[:digit:]]*)
        rvm_ruby_repo_branch="${string}"
        rvm_head_flag=1
        ;;

      (ruby|rbx|jruby|macruby|ree|kiji|rubinius|maglev|ironruby|goruby|tcs)
        rvm_ruby_interpreter="$string"
        ;;

      ([[:alpha:]]*([[:alnum:]]|_))
        rvm_ruby_name="$string"
        ;;

      (*)
        rvm_error "Unknown ruby interpreter string component: '$string'."
        return 1
        ;;
    esac
  done

  if [[ -z "${rvm_ruby_interpreter:-""}" ]]
  then
    # Detect interpreter based on version.
    case "$rvm_ruby_version" in
      (1.[8-9]*) rvm_ruby_interpreter="ruby"    ;;
      (0.[5-6]*) rvm_ruby_interpreter="macruby" ;;
      (1.[0-4]*) rvm_ruby_interpreter="rbx"     ;;
      (1.[5-7]*) rvm_ruby_interpreter="jruby"   ;;
      (2.*)
        rvm_error "Version '$rvm_ruby_version' is to confusing to select ruby interpreter."
        return 2
        ;;
    esac
  fi

  # Unspecified version
  rvm_ruby_version="${rvm_ruby_version:-}"
  if [[ -z "${rvm_ruby_version:-}" && "${rvm_ruby_interpreter}" != "ext" ]] && (( ${rvm_head_flag:=0} == 0 ))
  then
    rvm_ruby_version="${rvm_ruby_version:-"$(
    __rvm_db "${rvm_ruby_interpreter}_version"
    )"}"
  fi

  if [[ -z "${rvm_ruby_version:-}" ]]
  then
    rvm_ruby_string="${rvm_ruby_interpreter}"
  else
    rvm_ruby_string="${rvm_ruby_interpreter}-${rvm_ruby_version}"
  fi

  if [[ "${rvm_ruby_interpreter}" == "ext" ]]
  then
    true # skip checking for external rubies

  elif (( ${rvm_head_flag:=0} == 1 ))
  then
    rvm_ruby_string="${rvm_ruby_string}-head"

  elif [[ -n "${rvm_ruby_revision:-}" ]]
  then
    rvm_ruby_string="${rvm_ruby_string}-${rvm_ruby_revision}"

  elif [[ -n "${rvm_ruby_sha:-}" ]]
  then
    rvm_ruby_string="${rvm_ruby_string}-s${rvm_ruby_sha}"

  elif [[ -n "${rvm_ruby_tag:-}" ]]
  then
    rvm_ruby_string="${rvm_ruby_string}-${rvm_ruby_tag}"

  elif [[ -n "${rvm_ruby_patch_level:-}" ]]
  then
    rvm_ruby_string="${rvm_ruby_string}-${rvm_ruby_patch_level}"

  elif [[ -n "${rvm_ruby_user_tag:-}" ]]
  then
    rvm_ruby_string="${rvm_ruby_string}-${rvm_ruby_user_tag}"

  else
    patch_level="$(
    __rvm_db "${rvm_ruby_interpreter}_${rvm_ruby_version}_patch_level"
    )"

    if [[ -n "${patch_level:-""}" ]]
    then
      case "$rvm_ruby_interpreter" in
        ree|kiji|rbx)
          # REE, Kiji & Rubinius use dates for their patch levels.
          rvm_ruby_patch_level="${patch_level}"
          ;;
        *)
          # MRI uses -pN+ to specify the patch level.
          rvm_ruby_patch_level="p${patch_level}"
          ;;
      esac

    fi

    if [[ -n "${rvm_ruby_patch_level:-""}" ]]
    then
      rvm_ruby_patch_level="${rvm_ruby_patch_level/#pp/p}"
      rvm_ruby_patch_level="${rvm_ruby_patch_level/#prc/rc}"
      rvm_ruby_string="${rvm_ruby_string}-${rvm_ruby_patch_level}"

      case "$rvm_ruby_interpreter" in
        (ree|kiji|rbx)
          rvm_ruby_string="${rvm_ruby_string//-p*/-}"
          ;;

        (*)
          rvm_ruby_string="${rvm_ruby_string//-pp/-p}"
          rvm_ruby_string="${rvm_ruby_string//-prc/-rc}"
          ;;
      esac
    fi
  fi

  if [[ -n "${rvm_ruby_name:-}" ]]
  then
    rvm_ruby_string="${rvm_ruby_string}-${rvm_ruby_name}"
    # record the name for validation of -n option
    detected_rvm_ruby_name="${rvm_ruby_name}"
    # clean the name so it is not added again (rbx -n install problem)
    rvm_ruby_name=""
  else
    # record the no name for validation of -n option
    detected_rvm_ruby_name=""
  fi
}

__rvm_ruby_strings_exist()
{
  for rvm_ruby_string in ${@//,/ }
  do
    rvm_verbose_flag=0 __rvm_use "${rvm_ruby_string}" >/dev/null 2>&1 || return $?
    printf "%b" "${rvm_ruby_string}${rvm_gemset_name:+@}${rvm_gemset_name:-}\n"
  done
  unset rvm_ruby_string
}