rvm

#!/usr/bin/env bash

# rvm : Ruby enVironment Manager
# https://rvm.beginrescueend.com
# https://github.com/wayneeseguin/rvm

# TODO: Alter the variable names to make sense
\export HOME rvm_prefix rvm_user_install_flag rvm_path
HOME="${HOME%%+(\/)}" # Remove trailing slashes if they exist on HOME

if (( ${rvm_ignore_rvmrc:=0} == 0 ))
then
  for rvmrc in /etc/rvmrc "$HOME/.rvmrc"
  do
    if [[ -f "$rvmrc" ]]
    then
      if \grep '^\s*rvm .*$' "$rvmrc" >/dev/null 2>&1
      then
        printf "\nError:
        $rvmrc is for rvm settings only.
        rvm CLI may NOT be called from within $rvmrc.
        Skipping the loading of $rvmrc"
        return 1
      else
        source "$rvmrc"
      fi
    fi
  done
fi

# detect rvm_path if not set
if [[ -z "${rvm_path:-}" ]]
then
  if (( UID == 0 ))
  then
    if (( ${rvm_user_install_flag:-0} == 0 ))
    then
      rvm_user_install_flag=0
      rvm_prefix="/usr/local"
      rvm_path="${rvm_prefix}/rvm"
    else
      rvm_user_install_flag=1
      rvm_prefix="$HOME"
      rvm_path="${rvm_prefix}/.rvm"
    fi
  else
    if [[ -d "$HOME/.rvm" ]]
    then
      rvm_user_install_flag=1
      rvm_prefix="$HOME"
      rvm_path="${rvm_prefix}/.rvm"
    else
      rvm_user_install_flag=0
      rvm_prefix="/usr/local"
      rvm_path="${rvm_prefix}/rvm"
    fi
  fi
else
  # remove trailing slashes, btw. %%/ <- does not work as expected
  rvm_path="${rvm_path%%+(\/)}"
fi

# guess rvm_prefix if not set
if [[ -z "${rvm_prefix}" ]]
then
  rvm_prefix=$( dirname $rvm_path )
fi

# guess rvm_user_install_flag if not set
if [[ -z "${rvm_user_install_flag}" ]]
then
  if [[ "${rvm_prefix}" == "${HOME}" ]]
  then
    rvm_user_install_flag=1
  else
    rvm_user_install_flag=0
  fi
fi

if [[ -n "${BASH_VERSION:-}" ]] || [[ -n "${ZSH_VERSION:-}" ]]
then
  if type rvm 2>&1 | \grep 'function' >/dev/null
  then
    rvm_loaded_flag=1
  else
    rvm_loaded_flag=0
  fi
else
  #TODO: Why only bash and zsh mean rvm was loaded ?
  rvm_loaded_flag=0
fi

if (( ${rvm_loaded_flag:=0} == 0 )) || (( ${rvm_reload_flag:=0} == 1 ))
then
  if [[ -n "${rvm_path}" && -d "$rvm_path" ]]
  then
    true ${rvm_scripts_path:="$rvm_path/scripts"}

    for script in base version selector cd cli override_gem
    do
      if [[ -f "$rvm_scripts_path/$script" ]]
      then
        source "$rvm_scripts_path/$script"
      else
        printf "WARNING:
        Could not source '$rvm_scripts_path/$script' as file does not exist.
        RVM will likely not work as expected.\n"
      fi
    done

    rvm_version="$(cat "$rvm_path/VERSION")"

    export rvm_version="${rvm_version/%.}"

    alias rvm-restart="rvm_reload_flag=1 source '${rvm_path}/scripts/rvm'"

    if ! command -v ruby >/dev/null 2>&1 || command -v ruby | \grep -v rvm >/dev/null
    then
      if [[ -s "$rvm_path/environments/default" ]]
      then
        source "$rvm_path/environments/default"
      fi
    fi

    # Makes sure rvm_bin_path is in PATH atleast once.
    __rvm_conditionally_add_bin_path

    if (( ${rvm_reload_flag:=0} == 1 ))
    then
      printf 'RVM reloaded!\n'
    fi

    rvm_loaded_flag=1
    rvm_reload_flag=0
  else
    printf "\n\$rvm_path ($rvm_path) does not exist."
  fi
  unset rvm_prefix_needs_trailing_slash rvm_rc_files rvm_gems_cache_path \
    rvm_gems_path rvm_project_rvmrc_default rvm_gemset_separator
fi

if [[ -t 0 ]] && (( ${rvm_project_rvmrc:-1} > 0 )) && command -v __rvm_project_rvmrc >/dev/null  2>&1
then
  # Reload the rvmrc, use promptless ensuring shell processes does not
  # prompt if .rvmrc trust value is not stored.
  rvm_promptless=1 __rvm_project_rvmrc
fi