#!/bin/bash

function __rvm_install_source {

  if [ -z "$rvm_selected" ] ; then __rvm_select $* ; fi

  result=0
  __rvm_log "info" "Installing Ruby from source to: $rvm_ruby_home"
  mkdir -p $rvm_ruby_log_path

  __rvm_pushpop $rvm_source_path

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

  if [ -z "$rvm_ruby_tag" -a -z "$rvm_ruby_rev" ] ; then
    if [ ! -d $rvm_ruby_src_path ]  ; then
      rvm_url="${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
      __rvm_log "info" "Extracting $rvm_ruby_package_name ..."
      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_source_path
      if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
    fi
  else
    __rvm_log "info" "Retrieving Ruby from $rvm_url"
    if [ ! -z "`echo $rvm_url | grep '^git'`" ] ; then
      if [ -d "$rvm_ruby_src_path/.git" ] ; then
        cd $rvm_ruby_src_path
        if [ -z "$rvm_ruby_rev" ] ; then
          git pull origin master
          if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
        else
          git checkout ${rvm_ruby_rev:-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_rev" ] ; then
        # TODO: Check if tag v is valid
        rvm_url=$rvm_ruby_repo_url/tags/$rvm_ruby_tag
        rvm_rev=""
      else
        if [ "$rvm_ruby_rev" = "head" -o "$rvm_ruby_rev" = "trunk" ] ; 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_rev"
        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 "$rvm_ruby_src_path/configure" -a "$rvm_ruby_interpreter" = "ruby" ] ; then
    rvm_autoconf=`which autoconf`
    if [ $? -gt 0 ] ; then __rvm_log "fail" "rvm expects autoconf" ; result=$? ; return $result ; fi
    __rvm_run "autoconf" $rvm_autoconf
    if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
  fi

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

  __rvm_log "info" "Compiling $rvm_ruby_package_name, this may take a while, depending on your cpu(s)..."
  if [ -z "$rvm_ruby_make" ] ; then
    __rvm_run "make" make $rvm_make_flags
  else
    __rvm_run "make" $rvm_ruby_make $rvm_make_flags
  fi
  if [ $? -gt 0 ] ; then result=$? ; return $result ; fi

  if [ -z "$rvm_ruby_make" ] ; then
    __rvm_log "info" "Installing $rvm_ruby_package_name"
    __rvm_run "install" make install
  else
    __rvm_run "install" $rvm_ruby_make_install
  fi
  if [ $? -gt 0 ] ; then result=$? ; return $result ; fi

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

  GEM_HOME="$rvm_gem_home" ; export GEM_HOME
  GEM_PATH="$rvm_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 {
# TODO: Extract the outer looping mechanism with ruby_do's
  rubies=() ; successes=() ; errors=() ; statuses=()
  # TODO: Extract the common functionality out of the if below
  if [ ! -z "$(echo "$rvm_ruby_version" | awk '/,/')" ] ; then
    rvm_ruby_versions=`echo $rvm_ruby_version | tr ',' ' '`
    for rvm_ruby_string in $rvm_ruby_versions ; do
      unset rvm_ruby_interpreter rvm_ruby_version rvm_ruby_repo_url rvm_ruby_package_name rvm_ruby_patch_level rvm_ruby_configure rvm_ruby_make rvm_ruby_make_install rvm_ruby_rev rvm_ruby_tag rvm_major_version rvm_minor_version rvm_gem_set_name rvm_gem_home rvm_ruby_binary rvm_ruby_package_name rvm_ruby_home rvm_ruby_log_path rvm_ruby_src_path rvm_ruby_irbrc rvm_selected
      if [ ! -z "$(echo $rvm_ruby_selector | awk '/^[0-9]/')" ] ; then
        rvm_ruby_interpreter="ruby"
        rvm_ruby_version="$rvm_ruby_selector"
      else
        rvm_ruby_interpreter="$rvm_ruby_selector"
        unset rvm_ruby_version
      fi
      __rvm_log "debug" $rvm_ruby_string
      __rvm_select
      __rvm_install_ruby
    done
  else
    __rvm_select
    __rvm_install_ruby
  fi
}

function __rvm_install_ruby {

  if [ -z "$rvm_selected" ] ; then __rvm_select $* ; fi
  if [ ! -z "$RUBYOPT" ]    ; then ruby_options=$RUBYOPT ; unset RUBYOPT ; fi

  case "$rvm_ruby_interpreter" in

    macruby)
      if [ "`uname`" = "Darwin" ] ; then
        #rvm_macruby_repo_url="${rvm_macruby_repo_url:-"http://svn.macosforge.org/repository/ruby/MacRuby"}"
        rvm_macruby_repo_url="${rvm_macruby_repo_url:-"git://github.com/masterkain/macruby.git"}"
        rvm_ruby_repo_url=$rvm_macruby_repo_url
        #rvm_macruby_nightly_url=`__rvm_db "macruby_nightly_url"`
        rvm_ruby_configure=""
        rvm_ruby_make="rake macruby:build framework_instdir=$rvm_path/macruby-head framework_name=/macruby-head --trace"
        rvm_ruby_make_install="rake framework:install framework_instdir=$rvm_path/macruby-head framework_name=/macruby-head --trace"
        rvm_ruby_rev="${rvm_ruby_rev:-head}" # Hard coding this for now
        rvm_url=$rvm_ruby_repo_url

        DESTDIR="$rvm_ruby_home" ; export DESTDIR
        if [ -z "$rvm_ruby_rev" ] ; then
          # TODO: Check if tag v is valid
          #rvm_ruby_repo_url=$rvm_ruby_repo_url/tags/$rvm_ruby_tag
          rvm_ruby_rev="head" # For now, until nightly release are available.
        else
          if [ "$rvm_ruby_rev" = "head" -o "$rvm_ruby_rev" = "trunk" ] ; then
            #rvm_ruby_repo_url=$rvm_ruby_repo_url/trunk
            rvm_ruby_rev="head"
          else
            #rvm_ruby_repo_url=$rvm_ruby_repo_url/trunk
            rvm_ruby_rev="-r $rvm_ruby_rev"
          fi
        fi
        #__rvm_fetch $rvm_url
        #__rvm_run /usr/sbin/installer -pkg $rvm_ruby_package_name.pkg -target "$rvm_path/$rvm_ruby_package_name/"
        __rvm_install_source
        unset DESTDIR
      else
        __rvm_log "fail" "MacRuby can only be installed on a Darwin OS."
      fi
      __rvm_irbrc
    ;;

    ruby-enterprise|ree)
      rvm_url="http://rubyforge.org/frs/download.php/58677/$rvm_ruby_package_name.tar.gz"
      __rvm_log "info" "Installing Ruby Enterprise Edition from source to: $rvm_ruby_home"
      __rvm_pushpop $rvm_source_path
      if [ -d $rvm_ruby_src_path ]  ; then
        cd $rvm_ruby_src_path
      else
        __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
        __rvm_log "info" "Extracting $rvm_ruby_package_name..."
        mkdir -p $rvm_ruby_src_path
        __rvm_run "extract" tar xzf $rvm_archives_path/$rvm_ruby_package_name.tar.gz -C $rvm_source_path
        if [ $? -gt 0 ] ; then result=$? ; return $result ; fi
      fi

      __rvm_log "info" "Installing $rvm_ruby_package_name, this may take a while, depending on your cpu(s)..."
      mkdir -p $rvm_ruby_log_path

      cd $rvm_ruby_src_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 $rvm_path/ruby-enterprise-$rvm_ruby_version-$rvm_ruby_patch_level --dont-install-useful-gems --no-tcmalloc $rvm_ruby_configure
      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_log "info" "Installing $rvm_gem_name"
        __rvm_run "gems" $rvm_ruby_home/bin/gem install $rvm_gem_name --no-rdoc --no-ri -q
      done

      __rvm_irbrc
      __rvm_bin_scripts
      __rvm_post_install
      __rvm_pushpop
    ;;

    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_rev="head"
      # TODO: Check if already git repo, then git pull origin master && build

      if [ ! -d $rvm_ruby_home -o ! -d $rvm_ruby_home/.git ] ; then
        rm -rf $rvm_ruby_home
        git clone --depth 1 $rvm_ruby_repo_url $rvm_ruby_home
      fi
      cd $rvm_ruby_home

      # prereqs, 1.8.6 w/ParseTree & rake. Yes this could all be one line... not pushing our luck.
      echo `rvm install 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.
      rake186rbx=`rvm 1.8.6 -m rbx ; which rake`
      if [ ! -z "$rvm_jit_flag" ]; then
        __rvm_run "build" RBX_LLVM=1 $rake186rbx build
      else
        __rvm_run "build" $rake186rbx build
      fi ; unset rake186rbx

      for binary in ruby irb ; do
        ln -fs $rvm_ruby_home/bin/rbx $rvm_ruby_home/bin/$binary
      done
      $rvm_ruby_home/bin/rbx -S gem install rake --no-rdoc --no-ri

      for binary_name in gem rake ; do
        ruby_wrapper=$(cat <<RubyWrapper
#!/bin/bash

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

exec $rvm_ruby_home/bin/rbx -S $binary_name "\$@"
RubyWrapper
)
        for file_name in $rvm_bin_path/gem-$rvm_ruby_package_name $rvm_ruby_home/bin/gem ; do
          echo "$ruby_wrapper" > $file_name
          if [ -f $file_name ] ; then chmod +x $file_name ; fi
        done
        unset ruby_wrapper binary_name file_name
      done
      __rvm_irbrc
      __rvm_bin_scripts
    ;;

    jruby)
      rvm_package_file="$rvm_ruby_interpreter-bin-$rvm_ruby_version"
      rvm_url="http://dist.codehaus.org/$rvm_ruby_interpreter/$rvm_ruby_version/$rvm_package_file.zip"
      rvm_jruby_repo_url="${rvm_jruby_repo_url:-"git://kenai.com/jruby~main"}"

      __rvm_log "info" "Installing JRuby to: $rvm_ruby_home"
      mkdir -p $rvm_ruby_log_path
      __rvm_pushpop $rvm_source_path

      if [ ! -z "$rvm_ruby_rev" ] ; 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
          # TODO: Test if 'ant' is installed, if not throw error.
          cd $rvm_ruby_src_path && ant
        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_log "info" "Extracting $rvm_package_file..."
          rvm_unzip=`which unzip`
          if [ $? -ne 0 ] ; then
            __rvm_log "error" "'unzip' was not found in your PATH. jRuby official release comes as a .zip file, hence 'unzip' is required to extract it. Please install 'unzip' and try again."
          else
            __rvm_run "extract" unzip -q $rvm_archives_path/$rvm_package_file.zip -d $rvm_source_path
          fi
          cd $rvm_ruby_src_path
        fi
      fi

      __rvm_log "info" "Installing $rvm_ruby_package_name..."
      mkdir -p $rvm_ruby_home/bin/
      __rvm_run "sync" rsync -ag $rvm_ruby_src_path/ $rvm_ruby_home/
      __rvm_run "nailgun" "cd $rvm_ruby_src_path/tool/nailgun && make $rvm_make_flags"
      __rvm_pushpop
      chmod +x $rvm_ruby_home/bin/*


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

      for binary in rake rdoc ri spec autospec ; 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_irbrc
      __rvm_bin_script

      ln -fs $rvm_ruby_home/bin/ruby $rvm_path/bin/$rvm_ruby_package_name # Is this necessary?

      __rvm_use
      for rvm_gem_name in jruby-openssl ; do
        __rvm_log "info" "Installing $rvm_gem_name"
        __rvm_run "gems" gem install $rvm_gem_name --no-rdoc --no-ri -q
      done ; unset rvm_gem_name

    ;;

    ruby)
        # Merge configure options with user specified options
        rvm_ruby_configure="--enable-shared=true --enable-pthread $rvm_ruby_configure "
        if [ "`uname`" = "Darwin" ] ; then ARCHFLAGS="-arch x86_64 -arch i386" ; export ARCHFLAGS ; fi
      __rvm_install_source $*
    ;;

    default)
      __rvm_log "fail" "please specify a ruby implementation to install."
    ;;

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

  esac

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

# TODO: DRY up __rvm_remove and __rvm_uninstall
function __rvm_remove {
  if [ -z "$rvm_selected" ] ; then __rvm_select $* ; fi

  if [ ! -z "$rvm_ruby_package_name" ] ; then
    for dir in $rvm_source_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
    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_uninstall {
  if [ -z "$rvm_selected" ] ; 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" "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
    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_post_install {
  for binary in gem irb erb ri rdoc testrb rake ; 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 "$rvm_gem_home/bin/$binary" ] ; then
        cp -f $rvm_gem_home/bin/$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

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

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

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

  binary=rake
  if [ -x $rvm_gem_home/bin/$binary ] ; then
    if [ "$rvm_gem_home" != "$rvm_ruby_home" ] ; then
      cp $rvm_gem_home/bin/$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
    __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 $rvm_source_path/$rvm_gem_package_name ]  ; then
      cd $rvm_source_path/$rvm_gem_package_name
    else
      __rvm_fetch $rvm_gem_url
      mkdir -p $rvm_source_path/$rvm_gem_package_name
      __rvm_run "rubygems.extract" tar zxf $rvm_archives_path/$rvm_gem_package_name.tgz -C $rvm_source_path
    fi
    __rvm_run "rubygems.install" GEM_PATH=$rvm_gem_path GEM_HOME=$rvm_gem_home $rvm_ruby_home/bin/ruby $rvm_source_path/$rvm_gem_package_name/setup.rb
    result=$?
    if [ $result -eq 0 ] ; then
      __rvm_log "info" "Installation of rubygems $rvm_ruby_package_name completed successfully."
    fi

    __rvm_inject_ruby_shebang "$rvm_ruby_home/bin/gem"
  else
    # 1.9 has it's own built-in gem command
    __rvm_inject_ruby_shebang "$rvm_ruby_src_path/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
  fi
  return $result
}

function __rvm_inject_ruby_shebang {
  __rvm_actual_file $1
  if [ -f $actual_file ] ; then
    sed -i.orig -e "s=#\!/usr/bin/env [j]*ruby=#\!$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
    set -x
    if [ ! -z "`head -n 1 $actual_file | awk '/[j]*ruby/'`" ] ; then
      string="ENV['GEM_HOME']=ENV['GEM_HOME'] || '$rvm_gem_home'\nENV['GEM_PATH']=ENV['GEM_PATH'] || '$rvm_gem_home'\nENV['PATH']='$rvm_ruby_home/bin:$rvm_gem_home/bin:' + ENV['PATH']"
    elif [ ! -z "`head -n 1 $actual_file | awk '/bash/'`" ] ; then
      string="GEM_HOME=\${GEM_HOME:-'$rvm_gem_home'}\nGEM_PATH=\${GEM_PATH:-'$rvm_gem_home'}\nPATH=$rvm_ruby_home/bin:$rvm_gem_home/bin:\$PATH"
    fi
    set +x
    awk "NR==2 {print \"$string\"} {print}" $actual_file > $actual_file.new
    mv $actual_file.new $actual_file ; chmod +x $actual_file
  fi ; unset string 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
}