#!/usr/bin/env bash

source "$rvm_path/scripts/base"

result=0

__rvm_become

rubygems_setup() {

  __rvm_warn_on_rubyopt

  unset RUBYOPT

  if [[ ! -z "$(echo "$rvm_ruby_version" | awk '/^1\.9/')" ]] || [[ ! -z "$(echo $rvm_ruby_interpreter | awk '/^mput/')" ]] ; then
    install=0
  elif [[ "$rvm_ruby_string" = "ruby-head" ]] ; then
    install=0
  elif [[ -n "$(echo "$rvm_ruby_string" | awk '/^rbx|jruby|rubinius/')" ]]; then
    install=0
  else
    install=1
  fi

  if [[ "$install" -eq 0 ]] ; then

    "$rvm_path/scripts/log" "error" \
      "Cannot switch to ${version} for this interpreter."

    exit 1

  else

    "$rvm_path/scripts/log" "info" \
      "Removing old Rubygems files..."

    rubygems_dir="$(ruby -rrbconfig -e "puts Config::CONFIG.values_at('sitelibdir','vendorlibdir').detect {|path| File.directory?(File.join(path, 'rubygems')) }.to_s")"

    if [[ -n "$rubygems_dir" && -d "$rubygems_dir" ]]; then

      # Remove common files installed by ruby gems.
      \rm -rf "${rubygems_dir}/ubygems.rb" "${rubygems_dir}/rubygems.rb" \
        "${rubygems_dir}/rubygems" "${rubygems_dir}/gauntlet_rubygems.rb"

    fi

    "$rvm_path/scripts/log" "info" "Installing rubygems dedicated to $rvm_ruby_string..."
    rvm_rubygems_version="$version"
    rvm_gem_package_name="rubygems-$rvm_rubygems_version"
    rvm_rubygems_url=$(__rvm_db "rubygems_${rvm_rubygems_version}_url")
    rvm_gem_url="$rvm_rubygems_url/$rvm_gem_package_name.tgz"

    # Sanity check... If setup.rb is missing from the rubygems source path,
    # something went wrong. Cleanup, aisle 3!
    if [[ ! -f "${rvm_src_path:-"$rvm_path/src"}/$rvm_gem_package_name/setup.rb" ]]; then
      \rm -rf "${rvm_src_path:-"$rvm_path/src"}/$rvm_gem_package_name"
    fi

    if [[ ! -d "${rvm_src_path:-"$rvm_path/src"}/$rvm_gem_package_name" ]] ; then

      "$rvm_path/scripts/log" "info" \
        "Retrieving $rvm_gem_package_name"

      "$rvm_path/scripts/fetch" "$rvm_gem_url" ; result=$?

      if [[ "$result" -gt 0 ]] ; then

        "$rvm_path/scripts/log" "error" \
          "There has been an error while trying to fetch the source. Aborting the installation."

        return $result

      fi

      if [[ ! -d "${rvm_src_path:-"$rvm_path/src"}/$rvm_gem_package_name" ]] ; then
        \mkdir -p "${rvm_src_path:-"$rvm_path/src"}/$rvm_gem_package_name"
      fi

      __rvm_run "rubygems.extract" \
        "gunzip < ${rvm_archives_path:-"$rvm_path/archives"}/$rvm_gem_package_name.tgz | tar xf - -C ${rvm_src_path:-"$rvm_path/src"}" \
        "Extracting $rvm_gem_package_name ..."
    fi

    builtin cd "${rvm_src_path:-"$rvm_path/src"}/$rvm_gem_package_name"

    __rvm_run "rubygems.install" \
      "GEM_PATH=\"$rvm_ruby_gem_path:$rvm_ruby_global_gems_path\" GEM_HOME=\"$rvm_ruby_gem_home\" BUNDLE_PATH=\"$rvm_ruby_gem_home $rvm_ruby_home/bin/ruby\" \"${rvm_src_path:-"$rvm_path/src"}/$rvm_gem_package_name/setup.rb\"" \
      "Installing rubygems for $rvm_ruby_home/bin/ruby"
    result=$?

    if [[ "$result" == 0 ]] ; then

      "$rvm_path/scripts/log" "info" \
        "Installation of rubygems completed successfully."

    else

      "$rvm_path/scripts/log" "warning" \
        "Installation of rubygems did not complete successfully."

    fi

    if [[ ! -z "$rvm_ruby_major_version" ]] ; then
      ruby_lib_gem_path="$rvm_ruby_home/lib/ruby/gems/${rvm_ruby_release_version}.${rvm_ruby_major_version}"
    else
      ruby_lib_gem_path="$rvm_ruby_home/lib/ruby/gems/$interpreter"
    fi
  fi

  # Add ruby's gem path to ruby's lib direcotry.
  \mkdir -p "$(dirname $ruby_lib_gem_path)"

  if [[ -d "$ruby_lib_gem_path" ]] ; then \rm -rf "$ruby_lib_gem_path" ; fi

  ln -nfs "$rvm_ruby_gem_home" "$ruby_lib_gem_path"

  unset ruby_lib_gem_path
}

if ! command -v ruby > /dev/null ; then

  "$rvm_path/scripts/log" "error" \
    "'ruby' was not found, cannot install rubygems unless ruby is present (Do you have an RVM ruby installed & selected?)"

  exit 1

fi

#
# rvm rubygems use X
#
args=($*)
version="${args[0]}"
args="$(echo ${args[@]:1}) " # Strip trailing / leading / extra spacing.

if [[ -z "$version" ]] ; then

  "$rvm_path/scripts/log" "error" \
    "A version must be specified, for example 'rvm rubygems 1.3.7'"

  exit 1

fi

# Update the rubygems to the current.
if [[ "$version" = "current" ]]; then

  version="$(__rvm_db "${rvm_ruby_interpreter}_rubygems_version")"

  version="${rvm_rubygems_version:-"$(__rvm_db "rubygems_version")"}"

fi

rubygems_setup

exit $result