Extension talk:Enscript

When I install and run this extension on Fedora 6, the Apache error log spits out:

sh: /enscript: No such file or directory

enscript is installed on the machine and is located at the default location:

/usr/bin/enscript

The version of Mediawiki is 1.8.5. Any idea why this is happening?

take-off on Enscript w/ Kate...[edit]

Did something very similar, but using the perl port of Kate. Very clearly ripping off Yedidia, the php looks like:

<?php
#----------------------------------------------------------------------------
#    Extension initialization
#----------------------------------------------------------------------------
$KateVersion = '0.01';

global $wgExtensionCredits;
$wgExtensionCredits['parserhook'][] = array(
    'name'=>'Kate',
    'version'=>$KateVersion,
    'author'=>'xxxx',
    'url'=>'http://www.mediawiki.org/wiki/Extension:kate',
    'description' => 'Show code highlighted w/ Kate'
    );

$wgExtensionFunctions[] = "wfKate";

function wfKate() {
    global $wgParser;

    $wgParser->setHook( "Kate", "renderKate" );
}

function renderKate( $input , $argv, &$parser ) {
  $file['kate'] = "/usr/bin/perl /var/www/html/wiki/extensions/hlhtml.pl";
  $file['kate-options'] = $argv['lang'];

  $output="";

$descriptorspec = array(
   0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
   1 => array("pipe", "w")  // stdout is a pipe that the child will write to
);
$cwd = '/tmp';
  $ph=proc_open($file['kate']." ".$file['kate-options'],$descriptorspec,$pipes,$
cwd);
  fwrite($pipes[0],$input);
  fclose($pipes[0]);
  $output=stream_get_contents($pipes[1]);
  fclose($pipes[1]);

  $return_value = proc_close($ph);

  $output = str_replace("<H1>(stdin)</H1>","",$output);
  return $output;
}

?>

Enscript issues with MW 1.11.2 and Enscript 1.6.4[edit]

Had trouble getting things to work well with MediaWiki 1.11 and Enscript 1.6.4:

Enscript made a full set of headers and put "credits" after every bit of code
Odd errors appeared on the rendered page

The following hacked up version works OK but should probably be edited by someone who knows what she/he is doing. It would be really nice to have one footnote per page giving Enscript credit for generating the printout, but that's a bit beyond my skillset at this time...

<?php

$EnscriptVersion = '0.2';

#----------------------------------------------------------------------------
#    Extension initialization
#----------------------------------------------------------------------------
global $wgExtensionCredits;
$wgExtensionCredits['parserhook'][] = array
  (
  'name' => 'Enscript',
  'version' => $EnscriptVersion,
  'author' => 'Yedidia Klein',
  'url' => 'http://www.mediawiki.org/wiki/Extension:enscript',
  'description' => 'Show code highlighted w/ GNU Enscript'
  );

$wgExtensionFunctions[] = "wfEnscript";

#----------------------------------------------------------------------------

function wfEnscript ()
  {
  global $wgParser;
  $wgParser->setHook ("Enscript", "renderEnscript");
  }

#----------------------------------------------------------------------------

function renderEnscript ($input, $argv, &$parser)
  {
  $file['enscript'] = "/usr/bin/enscript";
  $file['enscript-options'] = " -q --language=html --color --style=msvc -E".$argv['lang']." -o -";

  $output = "";

  $descriptorspec = array
    (
    0 => array ("pipe", "r"),  // stdin is a pipe that the child will read from
    1 => array ("pipe", "w")   // stdout is a pipe that the child will write to
    );
  $cwd = '/tmp';
  $ph = proc_open ($file['enscript']." ".$file['enscript-options'], $descriptorspec, $pipes, $cwd);
  fwrite ($pipes[0], $input);
  fclose ($pipes[0]);
  $output = stream_get_contents ($pipes[1]);
  fclose ($pipes[1]);

  $return_value = proc_close ($ph);

  // Added by JR -- Knock off the HTML header, which screws things up pretty badly
  $ablank = "<! >";
  $output = preg_replace ('/<\!DOCTYPE.*>/', $ablank, $output);
  $output = preg_replace ('/<HTML>\n<HEAD>\n<TITLE>.*TITLE>\n<\/HEAD>/', $ablank, $output);
  $output = preg_replace ('/<BODY.*>/', $ablank, $output);
  $output = preg_replace ('/<ADDRESS.*ADDRESS>/', $ablank, $output);
  $output = preg_replace ('/<A.*>/', $ablank, $output);
  $output = str_replace ("<H1>(stdin)</H1>", $ablank, $output);
  $output = str_replace ("<HR>", $ablank, $output);
  $output = preg_replace ('/<PRE>\n/', "<PRE>", $output);
  $output = preg_replace ('/<\/BODY>\n<\/HTML>\n/', $ablank, $output);

  return $output;
  }

?>

HTML code cleanings[edit]

Replace

$output = str_replace("<H1>(stdin)</H1>","",$output);

with

$output=preg_replace("/^.*<pre>/si","<pre>", $output);
$output=preg_replace("/<\/pre>.*$/si","</pre>", $output);

It will clear all unnecessary HTML tags from output (DOCTYPE, HTML, etc).