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[[!template id=plugin name=aggregate author="[[Joey]]"]]
[[!tag type/useful]]
This plugin allows content from other feeds to be aggregated into the
wiki. To specify feeds to aggregate, use the
[[ikiwiki/directive/aggregate]] [[ikiwiki/directive]].
New users of aggregate should enable the `aggregateinternal => 1` option in the
.setup file. If you don't do so, you will need to enable the [[html]] plugin
as well as aggregate itself, since feed entries will be stored as HTML.
The [[meta]] and [[tag]] plugins are also recommended. Either the
[[htmltidy]] or [[htmlbalance]] plugin is suggested, since feeds can easily
contain html problems, some of which these plugins can fix.
You will need to run ikiwiki periodically from a cron job, passing it the
--aggregate parameter, to make it check for new posts. Here's an example
crontab entry:
*/15 * * * * ikiwiki --setup my.wiki --aggregate --refresh
Alternatively, you can allow `ikiwiki.cgi` to trigger the aggregation. You
should only need this if for some reason you cannot use cron, and instead
want to use a service such as [WebCron](http://webcron.org). To enable
this, turn on `aggregate_webtrigger` in your setup file. The url to
visit is `http://whatever/ikiwiki.cgi?do=aggregate_webtrigger`. Anyone
can visit the url to trigger an aggregation run, but it will only check
each feed if its `updateinterval` has passed.
## internal pages and `aggregateinternal`
This plugin creates a page for each aggregated item.
If the `aggregateinternal` option is enabled in the setup file (which is
recommended), aggregated pages are stored in the source directory with a
"._aggregated" extension. These pages cannot be edited by web users, and
do not generate first-class wiki pages. They can still be inlined into a
blog, but you have to use `internal` in [[PageSpecs|IkiWiki/PageSpec]],
like `internal(blog/*)`.
For backward compatibility, the default is that these pages have the
".html" extension, and are first-class wiki pages -- each one generates
a separate HTML page in the output, and they can even be edited.
That turns out to not be ideal for aggregated content, because publishing
files for each of those pages is a waste of disk space and CPU, and you
probably don't want to allow them to be edited. So, there is an alternative
method that can be used (and is recommended), turned on by the
`aggregateinternal` option in the setup file.
If you are already using aggregate and want to enable `aggregateinternal`,
you should follow this process:
1. Update all [[PageSpecs|ikiwiki/PageSpec]] that refer to the aggregated
pages -- such as those in inlines. Put "internal()" around globs
in those PageSpecs. For example, if the PageSpec was `foo/*`, it should
be changed to `internal(foo/*)`. This has to be done because internal
pages are not matched by regular globs.
2. Turn on `aggregateinternal` in the setup file.
3. Use [[ikiwiki-transition]] to rename all existing aggregated `.html`
files in the srcdir. The command to run is
`ikiwiki-transition aggregateinternal $setupfile`,
4. Refresh the wiki. (`ikiwiki -setup your.setup -refresh`)
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