#!/bin/bash

function __rvm_install_source {
  if [ -z "$rvm_ruby_selected_flag" ] ; then __rvm_select $* ; fi
  __rvm_log "info" "Installing Ruby from source to: $rvm_ruby_home"
  mkdir -p "$rvm_ruby_log_path"

  __rvm_pushpop "$rvm_src_path"

  if [ ! -z "$rvm_force_flag" ] ; then
    rm -rf "$rvm_ruby_home" "$rvm_ruby_src_path"
  fi

  result=0
  if [ -z "$rvm_ruby_tag" -a -z "$rvm_ruby_revision" ] ; then
    if [ ! -f "$rvm_archives_path/$rvm_ruby_package_name.tar.gz" ]  ; then
      rvm_url="${rvm_url:-"ftp://ftp.ruby-lang.org/pub/ruby/1.$rvm_major_version/$rvm_ruby_package_name.tar.gz"}"
      __rvm_log "info" "Downloading $rvm_ruby_package_name, this may take a while depending on your connection..."
      __rvm_fetch "$rvm_url"
      if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
    fi
    #mkdir -p "$rvm_ruby_src_path" # Is this line necessary considering -C below?    v
    __rvm_run "extract" "tar xzf $rvm_archives_path/$rvm_ruby_package_name.tar.gz -C $rvm_src_path" "Extracting $rvm_ruby_package_name ..."
    if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
  else
    __rvm_log "info" "Retrieving Ruby from $rvm_url"
    if [ ! -z "$(echo $rvm_url | awk '/^git/')" ] ; then
      if [ -d "$rvm_ruby_src_path/.git" ] ; then
        cd $rvm_ruby_src_path
        if [ -z "$rvm_ruby_revision" ] ; then
          git pull origin master
          if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
        else
          git checkout ${rvm_ruby_revision:-HEAD}
          if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
        fi
      else
        git clone --depth 1 $rvm_ruby_repo_url $rvm_ruby_src_path
        if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
      fi
    else
      if [ -z "$rvm_ruby_revision" ] ; then
        # TODO: Check if tag v is valid
        rvm_url="$rvm_ruby_repo_url/tags/$rvm_ruby_tag"
        rvm_rev=""
      else
        if [ "head" = "$rvm_ruby_revision" -o  "trunk" = "$rvm_ruby_revision" ] ; then
          rvm_url="$rvm_ruby_repo_url/trunk"
          rvm_rev=""
        else
          rvm_url=$rvm_ruby_repo_url/branches/ruby_1_${rvm_major_version}_${rvm_minor_version}
          rvm_rev="-r $rvm_ruby_revision"
        fi
      fi

      if [ -d "$rvm_ruby_src_path/.svn" ] ; then
        cd $rvm_ruby_src_path
        if [ -z "$rvm_rev" ] ; then
          svn update
        else
          svn checkout -q $rvm_rev
        fi
      else
        svn checkout -q $rvm_rev --force $rvm_url $rvm_ruby_src_path
      fi
      if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
    fi
  fi

  cd $rvm_ruby_src_path
  if [ $? -gt 0 ] ; then result=$? ; __rvm_log "error" "There was an error, please check $rvm_ruby_log_path/*.error.log" ; __rvm_pushpop ; return $result ; fi

  if [ ! -s "$rvm_ruby_src_path/configure" ] ; then
    rvm_autoconf="$(which autoconf)"
    if [ $? -gt 0 ] ; then __rvm_log "fail" "rvm expects autoconf" ; result=$? ; return $result ; fi
    __rvm_run "autoconf" "$rvm_autoconf" "Running autoconf"
    # if [ $? -gt 0 ] ; then result=$? ; return $result ; fi # Don't barf on autoconf fail...
  fi

  if [ -s ./Makefile -a -z "$rvm_reconfigure_flag" ] ; then
    __rvm_log "debug" "Skipping configure step, Makefile exists so configure must have already been run."
  elif [ -s ./configure ] ; then
    if [ -d "$rvm_path/usr/include/readline/" ] ; then
      configure_parameters="$configure_parameters --with-readline-dir=$rvm_path/usr/include/readline/"
    fi
    if [ -d "$rvm_path/usr/include/iconv/" ] ; then
      configure_parameters="$configure_parameters --with-iconv-dir=$rvm_path/usr/include/iconv/"
    fi
    __rvm_run "configure" "./configure --prefix=$rvm_ruby_home $rvm_ruby_configure $configure_parameters" "Configuring $rvm_ruby_package_name using $rvm_ruby_configure, this may take a while depending on your cpu(s)..."
    if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
    unset configure_parameters
  elif [ ! -z "rvm_ruby_configure" ] ; then
    $rvm_ruby_configure
  else
    __rvm_log "error" "Skipping configure step, 'configure' script does not exist, did autoconf not run successfully?"
  fi

  rvm_ruby_make=${rvm_ruby_make:-"/usr/bin/make"}
  __rvm_run "make" "$rvm_ruby_make $rvm_make_flags" "Compiling $rvm_ruby_package_name, this may take a while, depending on your cpu(s)..."
  if [ $? -gt 0 ] ; then result=$? ; return $result ; fi

  rvm_ruby_make_install=${rvm_ruby_make_install:-"/usr/bin/make install"}
  __rvm_run "install" "$rvm_ruby_make_install" "Installing $rvm_ruby_package_name"
  if [ $? -gt 0 ] ; then result=$? ; return $result ; fi

  __rvm_log "info" "Installation of $rvm_ruby_package_name is complete."

  GEM_HOME="$rvm_ruby_gem_home" ; export GEM_HOME
  GEM_PATH="$rvm_ruby_gem_home" ; export GEM_PATH

  __rvm_rubygems_setup
  __rvm_bin_script
  __rvm_run "chmod.bin" "chmod +x $rvm_ruby_home/bin/*"
  __rvm_post_install
  __rvm_pushpop
}

function __rvm_install_ruby {

  if [ -z "$rvm_ruby_selected_flag" ]   ; then __rvm_select $* ; fi
  if [ ! -z "$RUBYOPT" ]      ; then ruby_options="$RUBYOPT" ; unset RUBYOPT ; fi
  if [ "$(uname)" = "Darwin" ] ; then ARCHFLAGS="$rvm_archflags" ; export ARCHFLAGS ; fi

  case "$rvm_ruby_interpreter" in
    macruby)
      if [ "$(uname)" = "Darwin" ] ; then
        rvm_url="$(__rvm_db "macruby_nightly_url")"
        __rvm_log "info" "Retrieving latest macruby" # $rvm_archives_path/macruby_nightly.pkg
        __rvm_fetch $rvm_url
        mv $rvm_archives_path/latest $rvm_archives_path/macruby_nightly.pkg
        __rvm_run "macruby/extract" "xar -x -f $rvm_archives_path/macruby_nightly.pkg -C $rvm_ruby_home" "Extracting macruby nightly package."
      else
        __rvm_log "fail" "MacRuby can only be installed on a Darwin OS."
      fi
      __rvm_irbrc
    ;;

    ree)
      if [ ! -z "$(echo $rvm_ruby_version | awk '/^1\.8/')" -a -z "$rvm_head_flag" ] ; then
        rvm_url="$(__rvm_db "ree_${rvm_ruby_version}_url")/$rvm_ruby_package_file.tar.gz"
        __rvm_log "info" "Installing Ruby Enterprise Edition from source to: $rvm_ruby_home"
        __rvm_pushpop "$rvm_src_path"
        if [ -z "$rvm_force_flag" -a -d "$rvm_ruby_src_path" -a ! -x "$rvm_ruby_src_path/installer" ]  ; then
          __rvm_log "It appears that the archive has already been extracted. Skipping extract (use --force to force re-download and extract)."
        else
          __rvm_log "Downloading $rvm_ruby_package_file, this may take a while depending on your connection..."
          __rvm_fetch "$rvm_url"
          if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
          rm -rf "$rvm_ruby_src_path"
          __rvm_run "extract" "tar xzf $rvm_archives_path/$rvm_ruby_package_file.tar.gz -C $rvm_src_path" "Extracting $rvm_ruby_package_file..."
          if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
          mv "$rvm_src_path/$rvm_ruby_package_file" "$rvm_ruby_src_path"
        fi
        cd "$rvm_ruby_src_path"

        mkdir -p "$rvm_ruby_log_path"
        mkdir -p "${rvm_ruby_home}/lib/ruby/gems/1.8/gems"
        if [ ! -z "$rvm_ruby_configure" ] ; then rvm_ruby_configure="-c $rvm_ruby_configure"; fi
        __rvm_run "install" "./installer -a $rvm_path/$rvm_ruby_interpreter-$rvm_ruby_version-$rvm_ruby_patch_level --dont-install-useful-gems --no-tcmalloc $rvm_ruby_configure" "Installing $rvm_ruby_string, this may take a while, depending on your cpu(s)..."
        if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
        chmod +x $rvm_ruby_home/bin/*

        __rvm_rubygems_setup

        for rvm_gem_name in rake ; do
          __rvm_run "gems" "$rvm_ruby_home/bin/gem install $rvm_gem_name --no-rdoc --no-ri -q" "Installing $rvm_gem_name"
        done
        __rvm_inject_ruby_shebang "$rvm_ruby_gem_home/bin/rake"
        __rvm_inject_gem_env "$rvm_ruby_gem_home/bin/rake"

        __rvm_irbrc
        __rvm_bin_scripts
        __rvm_post_install
        __rvm_pushpop
      else
        rvm_url="$(__rvm_db "ree_${rvm_ruby_version}_repo_url")"
        if [ -z "$rvm_url" ] ; then
          __rvm_log "fail" "rvm does not know the rvm repo url for 'ree_${rvm_ruby_version}'"
          result=1
        else
          rvm_ruby_repo_url=$rvm_url
          __rvm_install_source $*
        fi
      fi
    ;;

    rbx|rubinius)
      unset GEM_HOME GEM_PATH MY_RUBY_HOME IRBRC
      PATH=$(echo $PATH | tr ':' '\n' | awk '$0 !~ /rvm/' | paste -sd : -)
      PATH=$rvm_bin_path:$PATH ; export PATH

      rvm_ruby_repo_url=$rvm_rubinius_repo_url
      rvm_ruby_configure=" "
      rvm_ruby_src_path=$rvm_ruby_home
      rvm_ruby_make="rake"
      rvm_ruby_make_install="rake install"
      rvm_ruby_home="$rvm_path/$rvm_ruby_interpreter-$rvm_ruby_version"
      #rvm_ruby_revision="head"

      # For Installer, can do this once it's ready:
      RBX_PREFIX=$rvm_ruby_home ; export RBX_PREFIX
      # Also see 'rakelib/configuration.rake'

      if [ ! -d "$rvm_ruby_src_path" -o ! -d "$rvm_ruby_src_path/.git" ] ; then
        rm -rf $rvm_ruby_src_path
        __rvm_run "rbx.repo" "git clone --depth 1 $rvm_ruby_repo_url $rvm_ruby_src_path" "Cloning $rvm_ruby_repo_url"
        cd $rvm_ruby_home
      else
        cd $rvm_ruby_home
        __rvm_run "rbx.repo" "git pull origin master" "Pulling from origin master"
      fi

      # prereqs, 1.8.6 w/ParseTree & rake. Yes this could all be one line... not pushing our luck.
      echo "$(export rvm_install_on_use_flag=1 ; rvm 1.8.6)" # This should install if missing.
      echo "$(rvm 1.8.6 -m rbx ; gem install --no-rdoc --no-ri rake ParseTree)" # This should install if missing.
      rvm_ruby_interpreter="rbx"
      __rvm_select

      if [ ! -z "$rvm_jit_flag" ]; then
        __rvm_run "configure" "./configure --prefix=$rvm_ruby_home --enable-llvm" "Configuring rbx with LLVM enabled"
      else
        __rvm_run "configure" "./configure --prefix=$rvm_ruby_home" "Configuring rbx"
      fi

      __rvm_run "build" "\$(rvm 1.8.6 -m rbx ; rake build)" "Building rbx"

      binaries="ruby irb" # Trick to work in more shells :)
      for binary_name in $(echo $binaries) ; do
        ln -fs $rvm_ruby_home/bin/rbx $rvm_ruby_home/bin/$binary_name
      done ; unset binary_name binaries

      __rvm_run "rake.install" "$rvm_ruby_home/bin/rbx gem install rake --no-rdoc --no-ri" "Installing Rake"
      binary=rake
      if [ -f $rvm_ruby_gem_home/bin/$binary ] ; then
        if [ "$rvm_ruby_gem_home" != "$rvm_ruby_home" ] ; then
          cp $rvm_ruby_gem_home/bin/$binary $rvm_ruby_home/bin/$binary
        fi
        chmod +x $rvm_ruby_home/bin/$binary
        __rvm_inject_ruby_shebang "$rvm_ruby_home/bin/$binary"
        __rvm_inject_gem_env "$rvm_ruby_home/bin/$binary"
      fi ; unset binary

      binaries="erb ri rdoc"
      __rvm_post_install

      binaries="gem" # Trick to work in more shells :)
      for binary_name in $(echo $binaries); do
        if [ $binary_name != "gem" ] ; then prefix="-S" ; fi
        ruby_wrapper=$(cat <<RubyWrapper
#!/bin/bash

GEM_HOME="$rvm_ruby_gem_home" ; export GEM_HOME
GEM_PATH="$rvm_ruby_gem_home" ; export GEM_PATH
MY_RUBY_HOME="$rvm_ruby_home" ; export MY_RUBY_HOME
PATH="$rvm_ruby_home/bin:$rvm_ruby_gem_home/bin:\$PATH" ; export PATH

exec $rvm_ruby_home/bin/rbx $prefix $binary_name "\$@"
RubyWrapper
)
        files="$rvm_ruby_home/bin/$binary_name $rvm_path/bin/$binary_name-$rvm_ruby_package_name"
        for file_name in $(echo $files)  ; do
          rm -f $file_name
          echo "$ruby_wrapper" > $file_name
          if [ -f $file_name ] ; then chmod +x $file_name ; fi
        done ; unset file_name
        unset ruby_wrapper binary_name files prefix
      done
      __rvm_irbrc
      __rvm_bin_scripts
    ;;

    jruby)
      mkdir -p $rvm_ruby_log_path
      __rvm_pushpop $rvm_src_path

      if [ ! -z "$rvm_ruby_revision" ] ; then
        if [ ! -d $rvm_path/$rvm_ruby_interpreter-$rvm_ruby_version -o ! -d $rvm_path/$rvm_ruby_interpreter-$rvm_ruby_version/.git ] ; then
          git clone --depth 1 $rvm_jruby_repo_url $rvm_ruby_src_path
          cd $rvm_ruby_src_path && ant # TODO: Test if 'ant' is installed, if not throw error.
        fi
      else
        if [ -d $rvm_ruby_src_path ]  ; then
          cd $rvm_ruby_src_path
        else
          if [ -z "$rvm_force_flag" -a -f $rvm_package_file -a -s $rvm_package_file ] ; then
            __rvm_log "info" "It appears that $rvm_package_file has already been downloaded, skipping. Use --force to force re-download."
          else
            __rvm_log "info" "Downloading $rvm_package_file, this may take a while depending on your connection..."
            __rvm_fetch $rvm_url
          fi
          __rvm_run "extract" "tar zxf $rvm_archives_path/$rvm_package_file.tar.gz -C $rvm_src_path" "Extracting $rvm_package_file..."
          if [ "$rvm_package_file" != "$rvm_ruby_string" ] ; then
            mv $rvm_src_path/$rvm_package_file $rvm_src_path/$rvm_ruby_string
          fi
          cd $rvm_ruby_src_path
        fi
      fi

      mkdir -p $rvm_ruby_home/bin/
      __rvm_run "nailgun" "cd $rvm_ruby_src_path/tool/nailgun && /usr/bin/make $rvm_make_flags" "Installing $rvm_ruby_package_name..."
      __rvm_pushpop

      if [ -z "$rvm_ruby_home" -o "$rvm_ruby_home" = "/" ] ; then echo "WTH?!?! rvm_ruby_home == / ??? not removing." ; return 1000000 ; fi
      rm -rf $rvm_ruby_home
      __rvm_run "install" "/bin/cp -Rf $rvm_ruby_src_path $rvm_ruby_home" "Installing JRuby to $rvm_ruby_home"

      __rvm_pushpop $rvm_ruby_home/bin/
      for binary in jirb jruby jgem ; do
        ln -nfs $binary ${binary#j}
      done ; unset binary
      __rvm_pushpop

      for binary in rake rdoc ri spec autospec \
                     testrb jrubyc jirb_swing jirb jgem ast generate_yaml_index.rb; do
        __rvm_inject_ruby_shebang $rvm_ruby_home/bin/$binary
        __rvm_inject_gem_env $rvm_ruby_home/bin/$binary
        chmod +x $rvm_ruby_home/bin/$binary
      done ; unset binary

      __rvm_rubygems_setup
      __rvm_irbrc
      __rvm_bin_script
      __rvm_use

      for rvm_gem_name in jruby-openssl ; do
        __rvm_run "gems" "$rvm_ruby_home/bin/gem install $rvm_gem_name --no-rdoc --no-ri -q" "Installing $rvm_gem_name"
      done ; unset rvm_gem_name
    ;;

    ruby)
      __rvm_install_source $*
    ;;

    default)
      __rvm_log "fail" "must specify a ruby interpreter to install."
    ;;

    *) __rvm_log "fail" "Ruby interpreter '$rvm_ruby_interpreter' is not known."

  esac

  if [ ! -z "$ruby_options" ] ; then RUBYOPT=$ruby_options ; export RUBYOPT ; fi
}

function __rvm_manage_rubies {
  __rvm_state
  rubies=() ; successes=() ; errors=() ; statuses=()
  # TODO: Extract the common functionality out of the if below
  if [ ! -z "$rvm_ruby_string" ] ; then
    unset rvm_ruby_interpreter rvm_ruby_version
    __rvm_${rvm_action}_ruby
  elif [ ! -z "$rvm_ruby_version" ] ;then
    for rvm_ruby_string in $(echo $rvm_ruby_version | tr ',' ' ') ; do
      __rvm_${rvm_action}_ruby
      __rvm_unset_ruby_variables
    done
  elif [ ! -z "$rvm_ruby_interpreter" ] ; then
    unset rvm_ruby_string rvm_ruby_version
    __rvm_${rvm_action}_ruby
  else # all
    if [ "$rvm_action" != "install" ] ; then
      while read bin_line
      do # Keep this on second line damnit!
        if [ -x $bin_line ] ; then
          rvm_ruby_string="$(dirname $bin_line | xargs dirname | xargs basename)"
          __rvm_${rvm_action}_ruby
          __rvm_unset_ruby_variables
        fi
      done < <(/bin/ls $rvm_path/*/bin/ruby 2> /dev/null)
    else
      __rvm_log "warn" 'Really? Install all? See "rvm list --all" and limit the selection to something more sane please :)'
    fi
  fi
  __rvm_state

  if [ ! -z "$rvm_summary_flag" ] ; then __rvm_summary ; fi
  if [ ! -z "$rvm_yaml_flag" ]    ; then __rvm_yaml    ; fi
  if [ ! -z "$rvm_json_flag" ]    ; then __rvm_json    ; fi
}

function __rvm_uninstall_ruby {
  if [ -z "$rvm_ruby_selected_flag" ] ; then __rvm_select $* ; fi

  if [ ! -z "$rvm_ruby_package_name" ] ; then
    for dir in $rvm_path ; do
      if [ -d $dir/$rvm_ruby_package_name ] ; then
        __rvm_log "info" "Removing $dir/$rvm_ruby_package_name..."
        rm -rf $dir/$rvm_ruby_package_name
      else
        __rvm_log "info" "$dir/$rvm_ruby_package_name has already been removed."
      fi
      if [ -e $rvm_bin_path/$rvm_ruby_package_name ] ; then
        rm -f $rvm_bin_path/$rvm_ruby_package_name
      fi
    done ; unset dir
    rm -rf $rvm_gem_path/$rvm_ruby_interpreter/$rvm_ruby_version*/
  else
    __rvm_log "fail" "Cannot uninstall unknown package '$rvm_ruby_package_name'"
  fi
}

function __rvm_remove_ruby {
  if [ -z "$rvm_ruby_selected_flag" ] ; then __rvm_select $* ; fi

  if [ ! -z "$rvm_ruby_package_name" ] ; then
    for dir in $rvm_src_path $rvm_path ; do
      if [ -d $dir/$rvm_ruby_package_name ] ; then
        __rvm_log "info" "Removing $dir/$rvm_ruby_package_name..."
        rm -rf $dir/$rvm_ruby_package_name
      else
        __rvm_log "info" "it seems that $dir/$rvm_ruby_package_name is already non existent."
      fi
      if [ -e $rvm_bin_path/$rvm_ruby_package_name ] ; then
        rm -f $rvm_bin_path/$rvm_ruby_package_name
      fi
    done ; unset dir
  else
    __rvm_log "fail" "Cannot uninstall unknown package '$rvm_ruby_package_name'"
  fi
}

function __rvm_post_install {
  binaries="${binaries:-"gem irb erb ri rdoc testrb rake"}"
  for binary in $(echo $binaries) ; do
    if [ -e $rvm_ruby_home/bin/$binary -o -e $rvm_ruby_src_path/bin/$binary ] ; then
      if [ "$rvm_ruby_src_path" != "$rvm_ruby_home" -a -f $rvm_ruby_src_path/bin/$binary ] ; then
        cp -f $rvm_ruby_src_path/bin/$binary $rvm_ruby_home/bin/$binary
      elif [ -f "$rvm_ruby_gem_home/bin/$binary" ] ; then
        cp -f $rvm_ruby_gem_home/bin/$binary $rvm_ruby_home/bin/$binary
      fi
      __rvm_inject_gem_env $rvm_ruby_home/bin/$binary
      __rvm_inject_ruby_shebang $rvm_ruby_home/bin/$binary
      chmod +x $rvm_ruby_home/bin/$binary
    fi
  done ; unset binary binaries

  __rvm_log "info" "Installing gems for $rvm_ruby_package_name."

  for rvm_gem_name in rake ; do
    __rvm_run "gems.install" "$rvm_ruby_home/bin/gem install $rvm_gem_name --no-rdoc --no-ri -q" "Installing $rvm_gem_name"
  done ; unset rvm_gem_name

  __rvm_log "info" "Installation of gems for $rvm_ruby_package_name is complete."

  binary=rake
  if [ -x $rvm_ruby_gem_home/bin/$binary ] ; then
    if [ "$rvm_ruby_gem_home" != "$rvm_ruby_home" ] ; then
      cp $rvm_ruby_gem_home/bin/$binary $rvm_ruby_home/bin/$binary
    fi
    __rvm_inject_ruby_shebang "$rvm_ruby_home/bin/$binary"
    __rvm_inject_gem_env "$rvm_ruby_home/bin/$binary"
  fi ; unset binary
}

function __rvm_rubygems_setup {
  if [ ! -z "$(echo $rvm_ruby_version | awk '/^1\.9/')" ] ; then
    # 1.9 has it's own built-in gem command
    __rvm_inject_ruby_shebang "$rvm_ruby_src_path/bin/gem"
    __rvm_inject_gem_env "$rvm_ruby_home/bin/gem"
    cp $rvm_ruby_src_path/bin/gem $rvm_ruby_home/bin/gem
    __rvm_run "rubygems.update" "$rvm_ruby_home/bin/gem update --system" "Updating rubygems for $rvm_ruby_string"
    __rvm_inject_ruby_shebang "$rvm_ruby_home/bin/gem"
    __rvm_inject_gem_env "$rvm_ruby_home/bin/gem"

  elif [ ! -z "$(echo $rvm_ruby_interpreter | awk '/^rbx|jruby/')" ] ; then
    __rvm_log "debug" "Skipping rubygems update for $rvm_ruby_version"

  else
    __rvm_log "info" "Installing rubygems dedicated to $rvm_ruby_package_name..."
    rvm_gem_package_name="rubygems-1.3.5"
    rvm_gem_url="http://rubyforge.org/frs/download.php/60718/$rvm_gem_package_name.tgz"
    if [ -d $rvm_src_path/$rvm_gem_package_name ]  ; then
      cd $rvm_src_path/$rvm_gem_package_name
    else
      __rvm_log "info" "Retrieving $rvm_gem_package_name"
      __rvm_fetch $rvm_gem_url
      mkdir -p $rvm_src_path/$rvm_gem_package_name
      __rvm_run "rubygems.extract" "tar zxf $rvm_archives_path/$rvm_gem_package_name.tgz -C $rvm_src_path" "Extracting $rvm_gem_package_name"
    fi
    __rvm_run "rubygems.install" "GEM_PATH=$rvm_gem_path GEM_HOME=$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 -eq 0 ] ; then
      __rvm_log "info" "Installation of rubygems $rvm_ruby_package_name completed successfully."
    else
      __rvm_log "warning" "Installation of rubygems $rvm_ruby_package_name did not complete successfully."
    fi
    __rvm_inject_ruby_shebang "$rvm_ruby_home/bin/gem"
  fi
  return $result
}

function __rvm_inject_ruby_shebang {
  __rvm_actual_file $1
  if [ -f $actual_file ] ; then
    sed -i.orig -e "s=env [j]*ruby=env $rvm_ruby_home/bin/ruby=" $actual_file
    rm -f $actual_file.orig ; chmod +x $actual_file
  fi ; unset actual_file
}

function __rvm_inject_gem_env {
  __rvm_actual_file $1
  if [ -f $actual_file ] ; then
    if [ ! -z "$(head -n 1 $actual_file | awk '/[j]*ruby/')" ] ; then
      string="ENV['GEM_HOME']=ENV['GEM_HOME'] || '$rvm_ruby_gem_home'\nENV['GEM_PATH']=ENV['GEM_PATH'] || '$rvm_ruby_gem_home'\nENV['PATH']='$rvm_ruby_home/bin:$rvm_ruby_gem_home/bin:' + ENV['PATH']"
    elif [ ! -z "$(head -n 1 $actual_file | awk '/bash/')" ] ; then
      string="GEM_HOME=\${GEM_HOME:-'$rvm_ruby_gem_home'}\nGEM_PATH=\${GEM_PATH:-'$rvm_ruby_gem_home'}\nPATH=$rvm_ruby_home/bin:$rvm_ruby_gem_home/bin:\$PATH"
    fi
    if [ ! -z "$string" ] ; then
      awk "NR==2 {print \"$string\"} {print}" $actual_file > $actual_file.new
      mv $actual_file.new $actual_file ; chmod +x $actual_file
      unset string
    fi
  fi ; unset actual_file
}

function __rvm_actual_file {
  if [ -L $1 ] ; then         # If the file is a symlink,
    actual_file="$(readlink $1)" # read the link target so we can preserve it.
  else
    actual_file="$1"
  fi
}