hilite.sty

\usepackage{shellout}
\usepackage{verbatim}
\usepackage{xcolor}
\usepackage{newverbs}

\makeatletter
\gdef\rouge@bin{rougify}
\def\hiliterougecmd#1{%
  \gdef\rouge@bin{#1}%
}

\def\hilitestyle#1{
  \gdef\thehilitestyle{#1}

  \shelloutone{\rouge@bin'' style --tex #1''}%
}

\def\hilitepalette#1{RG@palette@\thehighlightstyle\ @#1}

\def\hilite@defaultlang{text}
\def\hilitedefaultlang#1{%
  \def\hilite@defaultlang{#1}%
}

\newenvironment{hilite}[1][\hilite@defaultlang]{%
\renewenvironment{RG*}{\hilite@block@start\color{RG@fgcolor}}{\hilite@block@end}%
\begingroup%
\gdef\rouge@lexer{#1}%
\@bsphack%
\shellout@shell@start{\rouge@bin'' -l \rouge@lexer'' --escape-with '<@' '@>' -f tex}%
\verbatim@start%
}{%
\@esphack%
\endgroup%
\noindent\shellout@shell@end%
}

\newcommand\hl[1][\hilite@defaultlang]{% [
  \begingroup
  \gdef\thelexer{#1}%
  \catcode`\^^M\active%
  \Collectverb{\hl@}% @
}
% \def\hl#1{#1}
\def\hl@#1{%
  \shellout@setup{\rouge@bin'' -l \thelexer'' --escape-with '<@' '@>' -f tex}%
  \immediate\openout\shellout@out\shellout@shell@infile%
  \immediate\write\shellout@out{#1}%
  \immediate\closeout\shellout@out%
  \renewenvironment{RG*}{\hilite@inline@start\color{RG@fgcolor}}{\hilite@inline@end}%
  \shellout@shell@perform%
  \endgroup
}

\def\hilite@block@start{}
\def\hilite@block@end{}

\def\hiliteblockenv#1#2{
  \def\hilite@block@start{#1}%
  \def\hilite@block@end{#2}%
}

\def\hiliteinlineenv#1#2{
  \def\hilite@inline@start{#1}%
  \def\hilite@inline@end{#2}%
}

\makeatother