X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/d2b1264546fa412db8c1591bc8bb14aba04b960d..43a1640345e5af8f173a9d3669a4c9e0dfb0a512:/doc/todo/allow_site-wide_meta_definitions.mdwn?ds=inline

diff --git a/doc/todo/allow_site-wide_meta_definitions.mdwn b/doc/todo/allow_site-wide_meta_definitions.mdwn
index 893498f2c..62317ba1a 100644
--- a/doc/todo/allow_site-wide_meta_definitions.mdwn
+++ b/doc/todo/allow_site-wide_meta_definitions.mdwn
@@ -1,11 +1,135 @@
 [[!tag plugins/meta patch]]
+[[!template id=gitbranch branch=jon/defaultmeta author="[[Jon]]"]]
 
 I'd like to define [[plugins/meta]] values to apply across all pages
 site-wide unless the pages define their own: default values for meta
 definitions essentially.
 
-Here's a patch to achieve this (also in the "defaultmeta" branch of
-my github ikiwiki fork):
+    <snip old patch, see below for latest>
+
+-- [[Jon]]
+
+> This doesn't support multiple-argument meta directives like
+> `link=x rel=y`, or meta directives with special side-effects like
+> `updated`.
+>
+> The first could be solved (if you care) by a syntax like this:
+>
+>     meta_defaults => [
+>         { copyright => "© me" },
+>         { link => "about:blank", rel => "silly", },
+>     ]
+>
+> The second could perhaps be solved by invoking `meta::preprocess` from within
+> `scan` (which might be a simplification anyway), although this is complicated
+> by the fact that some (but not all!) meta headers are idempotent.
+> 
+> --[[smcv]]
+
+>> Thanks for your comment. I've revised the patch to use the config syntax
+>> you suggest. I need to perform some more testing to make sure I've
+>> addressed the issues you highlight.
+>> 
+>> I had to patch part of IkiWiki core, the merge routine in Setup, because
+>> the use of `possibly_foolish_untaint` was causing the hashrefs at the deep
+>> end of the data structure to be converted into strings. The specific change
+>> I've made may not be acceptable, though -- I'd appreciate someone providing
+>> some feedback on that hunk!
+
+    diff --git a/IkiWiki/Plugin/meta.pm b/IkiWiki/Plugin/meta.pm
+    index 6fe9cda..2f8c098 100644
+    --- a/IkiWiki/Plugin/meta.pm
+    +++ b/IkiWiki/Plugin/meta.pm
+    @@ -13,6 +13,8 @@ sub import {
+     	hook(type => "needsbuild", id => "meta", call => \&needsbuild);
+     	hook(type => "preprocess", id => "meta", call => \&preprocess, scan => 1);
+     	hook(type => "pagetemplate", id => "meta", call => \&pagetemplate);
+    +	hook(type => "scan", id => "meta", call => \&scan)
+    +		if $config{"meta_defaults"};
+     }
+     
+     sub getsetup () {
+    @@ -305,6 +307,15 @@ sub match {
+     	}
+     }
+     
+    +sub scan() {
+    +	my %params = @_;
+    +	my $page = $params{page};
+    +	foreach my $default (@{$config{"meta_defaults"}}) {
+    +		preprocess(%$default, page => $page,
+    +			destpage => $page, preview => 0);
+    +	}
+    +}
+    +
+     package IkiWiki::PageSpec;
+     
+     sub match_title ($$;@) {
+    diff --git a/IkiWiki/Setup.pm b/IkiWiki/Setup.pm
+    index 8a25ecc..e4d50c9 100644
+    --- a/IkiWiki/Setup.pm
+    +++ b/IkiWiki/Setup.pm
+    @@ -51,7 +51,13 @@ sub merge ($) {
+     					$config{$c}=$setup{$c};
+     				}
+     				else {
+    -					$config{$c}=[map { IkiWiki::possibly_foolish_untaint($_) } @{$setup{$c}}]
+    +					$config{$c}=[map {
+    +						if(ref $_ eq 'HASH') {
+    +							$_
+    +						} else {
+    +							IkiWiki::possibly_foolish_untaint($_)
+    +						}
+    +					} @{$setup{$c}}];
+     				}
+     			}
+     			elsif (ref $setup{$c} eq 'HASH') {
+    diff --git a/doc/ikiwiki/directive/meta.mdwn b/doc/ikiwiki/directive/meta.mdwn
+    index 000f461..8d34ee4 100644
+    --- a/doc/ikiwiki/directive/meta.mdwn
+    +++ b/doc/ikiwiki/directive/meta.mdwn
+    @@ -12,6 +12,16 @@ also specifies some additional sub-parameters.
+     The field values are treated as HTML entity-escaped text, so you can include
+     a quote in the text by writing `&quot;` and so on.
+     
+    +You can also define site-wide defaults for meta values by including them
+    +in your setup file. The key used is `meta_defaults` and the value is a list
+    +of hashes, one per meta directive. e.g.:
+    +
+    +	meta_defaults = [
+    +		{ copyright => "Copyright 2007 by Joey Hess" },
+    +		{ license   => "GPL v2+" },
+    +		{ link => "somepage", rel => "site entrypoint", },
+    +	],
+    +
+     Supported fields:
+     
+     * title
+
+-- [[Jon]]
+
+>> Ok, I've had a bit of a think about this. There are currently 15 supported
+>> meta fields. Of these: title, licence, copyright, author, authorurl,
+>> and robots might make sense to define globally and override on a per-page
+>> basis.
+>> 
+>> Less so, description (due to its impact on map); openid (why would
+>> someone want more than one URI to act as an openid endpoint to the same
+>> place?); updated. I can almost see why someone might want to set a global
+>> updated value. Almost.
+>> 
+>> Not useful are permalink, date, stylesheet (you already have a global
+>> stylesheet), link, redir, and guid.
+>>
+>> In other words, the limitations of my first patch that [[smcv]] outlined
+>> are only relevant to defined fields that you wouldn't want to specify a
+>> global default for anyway.
+>>
+>> Due to this, and the added complexity of the second patch (having to adjust
+>> `IkiWiki/Setup.pm`), I think the first patch makes more sense. I've thus
+>> reverted to it here.
+>>
+>> Is this merge-worthy?
 
     diff --git a/IkiWiki/Plugin/meta.pm b/IkiWiki/Plugin/meta.pm
     index b229592..3132257 100644