[Assorted-commits] SF.net SVN: assorted:[1026] wp-easy-filter/trunk/src

[<yan...@us...>]

Revision: 1026
          http://assorted.svn.sourceforge.net/assorted/?rev=1026&view=rev
Author:   yangzhang
Date:     2008-10-22 22:40:35 +0000 (Wed, 22 Oct 2008)

Log Message:
-----------
added wp-easy-filter src and README

Modified Paths:
--------------
    shell-tools/trunk/src/bash-commons/common.bash

Added Paths:
-----------
    wp-easy-filter/trunk/README
    wp-easy-filter/trunk/src/easyfilt.php

Modified: shell-tools/trunk/src/bash-commons/common.bash
===================================================================
--- shell-tools/trunk/src/bash-commons/common.bash	2008-10-22 20:02:01 UTC (rev 1025)
+++ shell-tools/trunk/src/bash-commons/common.bash	2008-10-22 22:40:35 UTC (rev 1026)
@@ -271,7 +271,7 @@
     find "$@" -type l |
     while read file ; do
         if [ ! -e "$file" ] ; then
-            sudo -u pkg rm "$file"
+            rm "$file"
         fi
     done
 }

Added: wp-easy-filter/trunk/README
===================================================================
--- wp-easy-filter/trunk/README	                        (rev 0)
+++ wp-easy-filter/trunk/README	2008-10-22 22:40:35 UTC (rev 1026)
@@ -0,0 +1,41 @@
+Overview
+--------
+
+This is a simple, general filter plug-in for WordPress.  You specify a mapping
+from tags to commands, such as:
+
+  $tag2cmd = array('pandoc' => '/usr/bin/pandoc -s --tab-stop=2');
+
+Then, for posts which are prefixed with a shebang line containing that tag, as in:
+
+  #!pandoc
+
+  Hello, world.
+
+Then the plug-in will feed the post contents to that command's stdin and return
+the rendered output to WordPress for display.
+
+This plug-in was designed to allow me to start using [Pandoc] for writing my
+blog posts.  (I couldn't force myself to use the [PHP Markdown Extras]
+plug-in.)
+
+It disables the `wpautop` filter, which automatically inserts `<p>` tags (among
+other magic), because that filter cannot properly parse the style of HTML that
+Pandoc outputs.
+
+Setup
+-----
+
+Drop `easyfilt.php` into your `wp-content/plugins/` directory, then activate
+the plug-in from the admin interface.
+
+Notes
+-----
+
+The author of [PHP Markdown Extras] wrote an [informative blog post] describing
+problems he had getting his filter to work properly and co-exist with the other
+built-in filters.
+
+[Pandoc]: http://johnmacfarlane.net/pandoc/
+[PHP Markdown Extras]: http://michelf.com/projects/php-markdown/extra/
+[informative blog post]: http://michelf.com/weblog/2005/wordpress-text-flow-vs-markdown/

Added: wp-easy-filter/trunk/src/easyfilt.php
===================================================================
--- wp-easy-filter/trunk/src/easyfilt.php	                        (rev 0)
+++ wp-easy-filter/trunk/src/easyfilt.php	2008-10-22 22:40:35 UTC (rev 1026)
@@ -0,0 +1,90 @@
+<?
+/*
+Plugin Name: Easy Filter
+Plugin URI: http://assorted.sf.net/wp-easy-filter/
+Description: Easy filtering of blog posts.
+Version: 1.0
+Author: Yang Zhang
+Author URI: http://www.mit.edu/~y_z/
+*/
+
+/*
+Copyright 2008 Yang Zhang
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#
+# Configuration options.
+#
+
+$tag2cmd = array(
+  'pandoc' => '/mit/y_z/.local/armed/bin/mit-pandoc -S --tab-stop=2'
+);
+
+#
+# More configuration options.
+#
+
+$debug = false;
+$debugfile = '/mit/y_z/web_scripts/wp/wp-content/plugins/easyfilt/log.txt';
+add_filter('the_content', 'filter_custom', 1);
+remove_filter('the_content', 'wpautop');
+
+#
+# Constants.
+#
+
+$descriptorspec = $descriptorspec = array(
+  0 => array("pipe", "r"), // stdin is a pipe that the child will read from
+  1 => array("pipe", "w"), // stdout is a pipe that the child will write to
+  2 => array("pipe", "w")  // stderr is a file to write to
+);
+
+#
+# Custom filter.
+#
+
+function filter_custom($content) {
+  global $debug, $tag2cmd, $wp_filter, $descriptorspec;
+  $lines = explode("\n", $content);
+  $tag = trim(substr($lines[0], 2));
+  if (substr($lines[0], 0, 2) === '#!' && $tag2cmd[$tag]) {
+    $cmd = $tag2cmd[$tag];
+    $process = proc_open($cmd, $descriptorspec, $pipes);
+    $body = implode("\n", array_slice($lines, 1));
+    if (is_resource($process)) {
+      fwrite($pipes[0], $body);
+      fclose($pipes[0]);
+
+      $filtered = stream_get_contents($pipes[1]);
+      fclose($pipes[1]);
+
+      $retval = proc_close($process);
+    }
+  } else {
+    $filtered = $content;
+  }
+  if ($debug) {
+    $f = fopen($debugfile, 'w');
+    fwrite($f, print_r($wp_filter, true));
+    fwrite($f, print_r($lines, true));
+    fwrite($f, substr($lines[0], 0, 2) . " " . (substr($lines[0], 0, 2) === '#!') . " " .  $cmd . " " . $tag2cmd[$cmd]);
+    fwrite($f, "\n===\n$content\n===\n$filtered");
+    fclose($f);
+  }
+  return $filtered;
+}
+?>


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