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#!/usr/bin/env bash

add()
{
  token=${1:-""}
  eval "${token}_flag=1"
  shift
if
    [[ -n "$format" ]]
  then
    [[ ${previous_is_format_var:-0} == 1 ]] && eval "${token}_prefix_flag=1"
    format="${format}\$${token}"
  else
format="\$${token}"
  fi
previous_is_format_var=1
}

add_raw_token()
{
  previous_is_format_var=0
  token=${1:-""}
  format="${format:-""}${token}"
}

rvm_gemset_separator="${rvm_gemset_separator:-"@"}"
ruby=$(
  builtin command -v ruby | GREP_OPTIONS="" \grep -v $rvm_path/bin/ruby
)
if
  [[ -n "$ruby" && -n "$(echo "$ruby" | awk '/rvm/{print}')" ]]
then
unset format
  while
    [[ $# -gt 0 ]]
  do
token="$1"
    shift
case "$token" in
      i|interpreter) add "interpreter" ;;
      v|version) add "version" ;;
      p|patchlevel) add "patchlevel" ;;
      r|revision) add "revision" ;;
      a|architecture) add "architecture" ;;
      g|gemset) add "gemset" ;;
      u|unicode) add "unicode" ;;
      s|system) ;; #skip when in ruby
      -d|--no-default) no_default=1 ;;
      *) add_raw_token "$token" ;;
    esac
done

if
    [[ -z "${format:-""}" && -z "$no_default" ]]
  then
for default in interpreter version patchlevel gemset
    do
add "$default"
    done
fi
ruby_string=$(dirname "$ruby" | xargs dirname | xargs basename)
  if
    [[ -n "$no_default" && -n "${format:-""}" ]]
  then
    # Do not display anything if no default flag was provided
    # and we are using the default ruby
    # Only people who explicitely ask for this will have the
    # slight performance penalty associated.
    [[ "$(rvm tools identifier)" != "$(rvm alias show default)" ]] || exit 0
  fi
strings=(${ruby_string//-/ })
  if
    (( ${interpreter_flag:-0} )) || [[ -n "$unicode_flag" ]]
  then
interpreter=${strings[0]}
    (( ${interpreter_prefix_flag:-0} )) && interpreter="-${interpreter}"
  fi
if
    (( ${version_flag:-0} )) || [[ -n "$unicode_flag" ]]
  then
version=${strings[1]}
    (( ${version_prefix_flag:-0} )) && version="-${version}"
  fi
if
    (( ${#strings[@]} > 2 ))
  then
if
      (( ${patchlevel_flag:-0} ))
    then
patchlevel=${strings[2]}
      (( ${patchlevel_prefix_flag:-0} )) && patchlevel="-${patchlevel}"
    fi
fi
if
    (( ${architecture_flag:-0} ))
  then
architecture="$(echo "$(ruby -v)" | sed 's/^.*\[//' | sed 's/\].*$//')"
    (( ${architecture_prefix_flag:-0} )) && architecture="-${architecture}"
  fi
if
    (( ${gemset_flag:-0} ))
  then
case "${GEM_HOME:-""}" in
      (*${rvm_gemset_separator:-"@"}*)
        gemset="${rvm_gemset_separator:-"@"}${GEM_HOME/*${rvm_gemset_separator:-"@"}/}"
        ;;
    esac
fi
if
    (( ${unicode_flag:-0} ))
  then
case "$interpreter" in
      (jruby) unicode="☯" ;;
      (rbx) unicode="❖" ;;
      (ree) unicode="✈" ;;
      (macruby) unicode="⌘" ;;
      (maglev) unicode="㎖" ;;
      (ironruby) unicode="♭" ;;
      (system) unicode="➆" ;;
      (goruby) unicode="⛳";;
      (ruby)
        case ${version:-""} in
          (1.8.6) unicode="➇❻" ;;
          (1.8.7) unicode="➇❼" ;;
          (1.8*) unicode="➇" ;;
          (1.9.1) unicode="➈❶" ;;
          (1.9.2) unicode="➈❷" ;;
          (1.9.3) unicode="➈❸" ;;
          (*) unicode="⦿" ;;
        esac ;;
      (*) unicode="⦿" ;;
    esac
if
echo "$ruby_string" | GREP_OPTIONS="" \grep '-head' >/dev/null 2>&1
    then
unicode="${unicode}⚡"
    fi
    (( ${unicode_prefix_flag:-0} )) && unicode="-${unicode}"
  fi
eval "echo \"$format\""
else
while
    (( $# ))
  do
token="$1"
    shift
case "$token" in
      s|system) echo "system" ;;
    esac
done
fi
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