#!/usr/bin/env bash

source "$rvm_scripts_path/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_scripts_path/log "error" "Cannot switch to ${version} for this interpreter."
    exit 1
  else
    $rvm_scripts_path/log "info" "Removing old Rubygems files..."
    rubygems_dir="$(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_scripts_path/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_gem_package_name/setup.rb" ]]; then
      rm -rf "$rvm_src_path/$rvm_gem_package_name"
    fi

    if [[ ! -d "$rvm_src_path/$rvm_gem_package_name" ]] ; then
      $rvm_scripts_path/log "info" "Retrieving $rvm_gem_package_name"
      $rvm_scripts_path/fetch "$rvm_gem_url"
      result=$? ; if [[ "$result" -gt 0 ]] ; then
        $rvm_scripts_path/log "error" "There has been an error while trying to fetch the source. Aborting the installation." ; __rvm_pushpop ; return $result
      fi
      mkdir -p "$rvm_src_path/$rvm_gem_package_name"
      __rvm_run "rubygems.extract" "cat $rvm_archives_path/$rvm_gem_package_name.tgz | gunzip | tar xf - -C $rvm_src_path" "Extracting $rvm_gem_package_name ..."
    fi

    builtin cd "$rvm_src_path/$rvm_gem_package_name"

    __rvm_run "rubygems.install" "GEM_PATH=$rvm_ruby_gem_path GEM_HOME=$rvm_ruby_gem_home BUNDLE_PATH=$rvm_ruby_gem_home $rvm_ruby_home/bin/ruby $rvm_src_path/$rvm_gem_package_name/setup.rb" "Installing rubygems for $rvm_ruby_home/bin/ruby"
    result=$?
    if [[ "$result" == 0 ]] ; then
      $rvm_scripts_path/log "info" "Installation of rubygems $rvm_ruby_package_name completed successfully."
    else
      $rvm_scripts_path/log "warning" "Installation of rubygems $rvm_ruby_package_name did not complete successfully."
    fi

    if [[ ! -z "$rvm_major_version" ]] ; then
      ruby_lib_gem_path="$rvm_ruby_home/lib/ruby/gems/${rvm_release_version}.${rvm_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_scripts_path/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
#
if [[ $# -gt 0 ]] ; then
  version="$1" ; shift
  args="$(echo "$@" | __rvm_strip)" 
else
  $rvm_scripts_path/log "error" "A version must be specified, for example 'rvm rubygems 1.3.7'"
  exit 1
fi

rubygems_setup

exit $result