I'd like to see some way to conditionally include wiki text based on
whether the wiki enables or disables certain features. For example,
-[[helponformatting]], could use `\[[if (enabled smiley) """Also, because
+[[ikiwiki/formatting]], could use `\[[!if (enabled smiley) """Also, because
this wiki has the smiley plugin enabled, you can insert \[[smileys]] and
some other useful symbols."""]]`, and a standard template for [[plugins]]
pages could check for the given plugin name to print "enabled" or
* `enabled pluginname`
* `disabled pluginname`
-* `any pagespec`: true if any of the pages in the [[PageSpec]] exist
-* `all pagespec`: true if all of the pages in the [[PageSpec]] exist
-* `no pagespec` or `none pagespec`: true if none of the pages in the [[PageSpec]] exist
+* `any pagespec`: true if any of the pages in the [[ikiwiki/PageSpec]] exist
+* `all pagespec`: true if all of the pages in the [[ikiwiki/PageSpec]] exist
+* `no pagespec` or `none pagespec`: true if none of the pages in the [[ikiwiki/PageSpec]] exist
* `thispage pagespec`: true if pagespec includes the page getting rendered (possibly one including the page with this content on it).
* `sourcepage pagespec`: true if pagespec includes the page corresponding to the file actually containing this content, rather than a page including it.
* `included`: true if included on another page, via [[plugins/inline]], [[plugins/sidebar]], [[plugins/contrib/navbar]], etc.
include an `else` clause; if so, you could label the text used if true as
`then`.
-Syntax could vary greatly here, both for the [[PreprocessorDirective]] and
-for the condition itself.
+Syntax could vary greatly here, both for the
+[[ikiwiki/Directive]] and for the condition itself.
> I think this is a good thing to consider, although conditionals tend to
> make everything a lot more complicated, so I also want to KISS, and not
> As to the syntax, to fit it into standard preprocessor syntax, it would
> need to look something like this:
>
-> \[[if test="enabled(smiley)" """foo"""]]
+> \[[!if test="enabled(smiley)" """foo"""]]
>
> --[[Joey]]
->> [[PageSpec]] syntax seems perfect, and your proposed syntax for the `if`
->> [[PreprocessorDirective]] looks fine to me.
+>> [[ikiwiki/PageSpec]] syntax seems perfect, and your proposed syntax for the `if`
+>> [[ikiwiki/Directive]] looks fine to me.
>>
->> [[PageSpec]]s don't give you `none` for free, since `!foo/*` as a boolean
+>> [[ikiwiki/PageSpec]]s don't give you `none` for free, since `!foo/*` as a boolean
>> would mean "does any page not matching `foo/*` exist", not "does `foo/*`
>> match nothing"; however, I don't really care much about `none`, since I
>> just threw it in while brainstorming, and I don't know any compelling use
>>
>> A few use cases for `included`, which I would really like to see:
>>
->> * On the sidebar page, you could say something like \[[if test="!included"
+>> * On the sidebar page, you could say something like \[[!if test="!included"
>> """This page, without this help message, appears as a sidebar on all
>> pages."""]]. The help text would then only appear on the sidebar page
>> itself, not the sidebar included on all pages.
>> typing in the if.
>>
>> --[[JoshTriplett]]
+
+This is now completely [[todo/done]]! See [[plugins/conditional]].
+
+--[[Joey]]
+
+> You rock mightily. --[[JoshTriplett]]
+
+Is there a way to test features other than plugins? For example,
+to add to [[ikiwiki/Markdown]] something like
+
+ \[[!if test="enabled(multimarkdown)" then="You can also use..."]]
+
+(I tried it like that just to see if it would work, but I wasn't that lucky.)
+--ChapmanFlack
+
+> No, not supported. I really think that trying to conditionalise text on a
+> page for multimarkdown is a path to madness or unreadability though.
+> Perhaps it would be better to have .mmdwn files that can only contain
+> multimarkdown? --[[Joey]]
+
+>> Really, there was only one (or maybe two) pages I had in mind as appropriate
+>> places for conditional text based on multimarkdown—the underlay pages
+>> for 'markdown' and maybe also 'formatting', because those are the pages you
+>> look at when you're trying to find out how to mark stuff up for the wiki, so
+>> if MM is enabled, they need to at least mention it and have a link to the
+>> MM syntax guide.--ChapmanFlack