alias

#!/usr/bin/env bash

unset rvm_default_flag rvm_wrapper_name

source "$rvm_scripts_path/base"

usage() {
  printf "%b" "

  Usage:

    rvm alias [action] [arguments]

  Examples:

    rvm alias create [alias_name] [ruby]
    rvm alias delete [alias_name]
    rvm alias show [alias_name]
    rvm alias list

"
}

alias_conflicts_with_ruby() {
  # If default exists, we should return true.
  [[ "$1" == "default" && ! -L "$rvm_rubies_path/default" ]] && return 1
  # Open for suggestions to a better way of doing this...
  alias_check_result="$(
    \. "$rvm_scripts_path/initialize"
    \. "$rvm_scripts_path/selector"
    \. "$rvm_scripts_path/selector_gemsets"
    export rvm_ruby_string=\"$1\"
    __rvm_ruby_string > /dev/null 2>&1
    echo "$?"
  )"

  if [[ "0" == "$alias_check_result" ]]; then
      rvm_error "You have attempted to create an alias called '$1', which is recognized as a rvm ruby."
    return 0
  fi

  return 1

  unset alias_check_result
}

alias_show() {
  typeset expanded_alias_name

  if [[ -z "$alias_name" ]]
  then
    rvm_log "usage: 'rvm alias show [alias_name]'"
    result=1
    return
  fi

  [[ -s "$rvm_path/config/alias" ]] || return 0

  expanded_alias_name="$("$rvm_scripts_path"/db "$rvm_path/config/alias" "$alias_name")"

  if [[ -z "$expanded_alias_name" ]]; then
    rvm_error "Unknown alias name: '$alias_name'"
    result=1
  else
    result=0
    if [[ -n "$gemset_name" ]] ; then
      printf "%b" "${expanded_alias_name}${rvm_gemset_separator:-"@"}${gemset_name}\n"
    else
      printf "%b" "${expanded_alias_name}\n"
    fi
  fi
}

alias_after_delete_default()
{
  rvm_log "Deleting default links/files"

  for _path in $rvm_bin_path/default_* "$rvm_environments_path/default" "$rvm_wrappers_path/default"
  do
    [[ -f "$_path" ]] && rm -rf ${_path}
  done

  for wrapper in "$rvm_path"/wrappers/default/*
  do
    wrapper="${wrapper##*\/}"

    if [[ -L "$rvm_bin_path/${wrapper}" ]]
    then
      rm -f "$rvm_bin_path/${wrapper}"
    fi

    rm -f "$rvm_bin_path/${wrapper}"

    # If the RVM bin path is different from rvm_path/bin, ensure they are
    # in sync.
    if [[ "${rvm_bin_path}" != "${rvm_path}/bin" ]]
    then
      rm -f "${rvm_path}/bin/${wrapper}"
    fi
  done
}

alias_delete() {
  rvm_log "Deleting alias: $alias_name"

  for link in "$rvm_rubies_path/$alias_name" ; do
    if [[ -L "$link" ]] ; then rm -f $link ; fi
  done

  [[ -s "$rvm_path/config/alias" ]] || return 0

  "$rvm_scripts_path"/db "$rvm_path/config/alias" "$alias_name" "delete"

  if [[ "default" == "$alias_name" ]] ; then
    alias_after_delete_default
  fi
}

alias_after_create_default()
{
  rvm_log "Creating default links/files"

  environment_id="${final_environment_identifier}"

  if (( ${rvm_user_install_flag:=0} == 0 ))
  then
    # Sets up the default wrappers.
    "$rvm_scripts_path/wrapper" "$rvm_ruby_string" --no-prefix
  else
    "$rvm_scripts_path/wrapper" "$rvm_ruby_string" "default"
  fi

  RUBY_VERSION="$("$rvm_ruby_home/bin/ruby" -v | \sed 's#^\(.*\) (.*$#\1#')"

  export GEM_HOME GEM_PATH MY_RUBY_HOME RUBY_VERSION

  for _path in "$rvm_environments_path" "$rvm_wrappers_path"
  do
    # Remove old default if it exists.
    [[ -L "$_path/default" ]] && rm -f "$_path/default"
    # Symlink n the new default
    \ln -fs "$_path/$environment_id" "$_path/default"
  done

  # Copy wrapper scripts for the newly set default to the RVM bin path.
  for wrapper in "$rvm_path"/wrappers/default/*
  do
    [[ -r "${wrapper}" ]] || continue

    if [[ -L "$rvm_bin_path/${wrapper##*\/}" ]]
    then
      rm -f "$rvm_bin_path/${wrapper##*\/}"
    fi

    cp -f "$wrapper" "$rvm_bin_path/${wrapper##*\/}"

    # If the RVM bin path is different from rvm_path/bin, ensure they are
    # in sync.
    if [[ "${rvm_bin_path}" != "${rvm_path}/bin" ]]
    then
      cp -f "${wrapper}" "${rvm_path}/bin/"
    fi
  done
}

alias_create()
{
  alias_name="${alias_name:-""}"
  rvm_ruby_string="$rvm_environment_identifier"

  rvm_expanding_aliases=1
  __rvm_become
  unset rvm_expanding_aliases

  if [[ "default" != "$alias_name" ]] && alias_conflicts_with_ruby "$alias_name"
  then
    # Force it to an empty alias name to trigger the usage.
    alias_name=""
  fi

  if [[ -z "${rvm_environment_identifier:-""}" || -z "$alias_name" ]]
  then
    rvm_error "usage: 'rvm alias [alias_name] [ruby_string]'"
    return 1

  else
    if [[ -z "$rvm_ruby_string" ]]
    then
      rvm_error "Unknown ruby string '$rvm_ruby_string' specified"
      return 1
    fi

    if [[ "default" == "$alias_name" ]]
    then rvm_alias=""
    fi

    if [[ -z "$rvm_alias" ]]
    then
      final_environment_identifier="${rvm_ruby_string:-$(__rvm_env_string)}"

      rvm_log "Creating alias $alias_name for $final_environment_identifier."
      ln -fs "$rvm_rubies_path/$rvm_ruby_string" "$rvm_rubies_path/$alias_name"

      rvm_log "Recording alias $alias_name for $final_environment_identifier."
      "$rvm_scripts_path"/db "$rvm_path/config/alias" "$alias_name" "$final_environment_identifier"

      [[ "default" != "$alias_name" ]] || alias_after_create_default
    else

      if [[ -d "$rvm_rubies_path/$alias_name" ]]
      then rvm_error "$rvm_rubies_path/$alias_name is taken and is *not* able to be an alias name."
      else rvm_error "$rvm_rubies_path/$alias_name is already aliased."
      fi
      return 1
    fi
  fi
}

alias_list() {
  typeset item items

  items=($(cd "$rvm_rubies_path" ; find . -maxdepth 1 -mindepth 1 -type l | sed -e 's#./##'))

  for item in "${items[@]}"
  do
    echo "$(basename "$item") => $("$rvm_scripts_path"/db "$rvm_path/config/alias" "$(basename "$item")")"
  done
}

alias_search_by_target() {
  typeset item items target search
  search="${alias_name}@${gemset_name}"

  items=($(cd "$rvm_rubies_path" ; find . -maxdepth 1 -mindepth 1 -type l | sed -e 's#./##'))

  for item in "${items[@]}"
  do
    target=$("$rvm_scripts_path"/db "$rvm_path/config/alias" "$(basename "$item")")
    if [[ "${search}" == "${target}" ]]
    then
      echo "$(basename "$item")"
    fi
  done
}

args=($*)
action="${args[0]:-""}"
alias_name="${args[1]:-""}"
rvm_environment_identifier="${args[2]:-""}"
args="$(echo ${args[@]:3})" # Strip trailing / leading / extra spacing.
result=0

if [[ ! -f "$rvm_path/config/alias" ]] ; then touch "$rvm_path/config/alias" ; fi

if printf "%b" "$alias_name" | grep "${rvm_gemset_separator:-"@"}" >/dev/null 2>&1 ; then
  gemset_name="${alias_name/*${rvm_gemset_separator:-"@"}/}"
  alias_name="${alias_name/${rvm_gemset_separator:-"@"}*/}"
else
  gemset_name=""
fi

if [[ -n "$alias_name" ]] ; then
  rvm_alias="$("$rvm_scripts_path/db" "$rvm_path/config/alias" "$alias_name")"
fi

case "$action" in
  delete|create|list|show|search_by_target)
    alias_${action}
    ;;
  help|usage)
    usage
    ;;
  *)
    usage
    exit 1
    ;;
esac

exit $?