Updated 20-Jun-08 for addition of storytitle
I'm really impressed with the Blosxom plugin mechanism. Rael Dornfest, author of Blosxom, put hooks at strategic points in the page generation process. At each hook point the main script iterates all the plugins present in the plugin directory. Plugins that implement the hook function can then modify the state or add additional data for use in the page presentation.
Consequently, a plugin only implements the hook functions it needs invoked to provide its features. Some powerful plugins need only implement one or two hook functions and are implemented with a couple dozen lines of Perl code.
When I started building this site I found it a little confusing to sort through all the plugins and understand their functionality. The ease of creating and modifying plugins has allowed a lot of developers to contribute to the Blosxom plugin registry. I found it helpful when Blosxom sites listed the plugins that implemented their site's features. So here is the list of plugins I use.
breadcrumbs - Creates the click-able trail to the current position in the weblog's path shown at the top of all .index pages and at the bottom of each article.
binary - Used to supply images from the directory in which an article exists. Modified to use LWP::MediaTypes since MIME::Types isn't installed on this web server. I also commented out the interpolate() function and added it to the one in interpolate_fancy to make this plugin coexist with interpolate fancy.
I no longer use binary because it is faster to just have Apache serve binary files directly from one or more directories outside of the Blosxom src tree.
I've stopped using this plugin since it requires Blosxom to look at each file to determine whether or not it should be skipped. So I'm starting to put all binary files in my images directory outside of Blosxom. This has the added advantage that I can just put "/images" and "/video" in by robots.txt file so my images and videos don't get indexed by search engine robots.
categories - Displays the tree of paths/categories of articles on the navigate page. Slightly modified to remove the root directory from the display. Added a hide feature to hide specified directories entirely - used this to prune subdirectories for my side bar menu. Removed flavour ending from all generated links since all paths are valid links, are shorter for people emailing links around, and would always use the default flavour. Modified to not calculate breadcrumbs since I use the breadcrumbs plugin for that feature.
config - Allows any Perl variable to be set differently in any category/directory. I use this to change the sort order for my glossary page to be alphabetical order by changing the sort_order plugin's sorder variable.
entries_cache - Speeds up processing of the site by caching the article index to avoid scanning directories until a configured amount of time has elapsed. Also caches article creation time to allow for editing of articles without changing their timestamps.
file - Used to include the navigational side div into all pages without copy/paste of the same HTML.
find - Provides search capabilities for all articles, comments, and linkbacks on the web site. HTML slightly modified to remove the advanced search link. Also set the hidden "path" input to the empty string so the entire site is searched regardless of where in the hierarchy the search was initiated.
foreshortened - Ends articles at the end of the first sentence. Used to provide the shortened version of articles for use in RSS and Atom feeds.
hide - Excludes directories of articles from the index views (like the agilitynerd.com main page) but still allows them to be searched by find.
hitcounter - Used to automatically generate the number of visitors displayed in the footer for each page on my site. These hit counts per page are used by my favorites plugin to generate my Favorites page.
interpolate_fancy - Used to remove the space allocated for the results of find and the breadcrumbs plugin when their variables aren't defined. I think I'll use this more in the future to dynamically change the page format.
lastcommented - Used to automatically generate the list of the last 10 articles that were commented shown in the side bar on each page of the site.
lastread - Used to automatically generate the list of the last 10 articles that were read shown in the side bar on each page of the site.
postheadprefoot - Allows each category/directory to have unique text inserted after the header and/or before the footer. I use this on my glossary page to add a category specific subsection. I had to modify the script to have paths resolve correctly.
redirect - Unmodified version of this plugin. I had to use it when I moved a directory within my tree so search engine and email list links would redirect correctly.
refererblock - A blacklist driven plugin to permanently redirect referer spam. The redirect probably has little effect on the receipt of referer spam but the 301 redirect code keeps the spammer's sites out of my site statistics.
rss10 - Provides the extra information to provide a valid RSS 1.0 feed for syndication. Slightly modified to work with the writeback plugin.
seemore - Adds "See more..." link within the text of a post when the post is shown in an index page. The location of the link is controlled by placing a special tag in the posting source file. I have modified this plugin to show the first "n" entries of an index page in full. Furthe
r modified to always create a link to my html flavoured pages.
sort_order - Allows sorting by date, directory names, or file name. I modified it to not read the URI parameters and just use a configuration variable. Then I used the config plugin to change the sort order for my glossary page to sort by file name instead of in reverse chronological order.
storytitle - sets the <title> element in the HTML <head> with the title of the article or the name of the category. I use it to aid in navigation and site statistics]].
timezone - Adjusts timestamps automatically created or entered using meta-creation_date: to be offset correctly to my timezone; which is different from the web server's timezone.
I no longer use timezone since I can set the timezone on my Slicehost server.
defaultflavour - Provides the user with the default Blosxom flavoured feed when an unknown flavour is requested. This keeps the user from getting the Unknown Flavour error across the top of the page.
wikiwordish - Provides WikiWord-like linking to Wiki articles, local article file names and modified to replace WikiWords with HTML <a> links. This plugin saves me from having to enter links to common sites to which I always refer. I had to name this file 00wikiwordish so that WikiWords would be correctly replaced in RSS and Atom feeds.
writeback blacklist plugin - Provides comment and TrackBack capability. This is Doug Alcorn's blacklist modified version to help fight comment spam. I've slightly modified mine to try to protect comment poster's from spam by obfuscating their email addresses.
In case anyone is trying to get these plugins to "play" together I have them named as follows: