MWWRender.ml

let cmd_dvips tmpprefix = "dvips -R -E -q \"" ^ tmpprefix ^ ".dvi\" -f >\"" ^tmpprefix^".ps\" " let cmd_latex tmpprefix = "latex -quiet \"" ^ tmpprefix ^ ".tex\" >\""^tmpprefix^".tmp\" " let cmd_convert tmpprefix finalpath = "convert -quality 100 -density 120 \"ps:"^tmpprefix^".ps\" \""^finalpath^"\"" exception ExternalCommandFailure of string let render tmppath finalpath outtex md5 = let tmpprefix0 = (string_of_int (Unix.getpid ))^"_"^md5 in   let tmpprefix = (tmppath^"\\"^tmpprefix0) in    let unlink_all  = begin Sys.remove (tmpprefix ^ ".dvi"); Sys.remove (tmpprefix ^ ".aux"); Sys.remove (tmpprefix ^ ".log"); Sys.remove (tmpprefix ^ ".tex"); Sys.remove (tmpprefix ^ ".ps"); Sys.remove (tmpprefix ^ ".tmp"); end in   let f = (Util.open_out_unless_exists (tmpprefix ^ ".tex")) in      begin output_string f (Texutil.get_preface ); output_string f outtex; output_string f (Texutil.get_footer ); close_out f;       if Util.run_in_other_directory tmppath (cmd_latex tmpprefix0) != 0 then (unlink_all ; raise (ExternalCommandFailure "latex")) else if (Sys.command (cmd_dvips tmpprefix) != 0) then (unlink_all ; raise (ExternalCommandFailure "dvips")) else if (Sys.command (cmd_convert tmpprefix (finalpath^"\\"^md5^".png")) != 0) then (unlink_all ; raise (ExternalCommandFailure "convert")) else unlink_all end