add notes about mediawiki

[git.ikiwiki.info.git] / doc / todo / allow_site-wide_meta_definitions.mdwn

diff --git a/doc/todo/allow_site-wide_meta_definitions.mdwn b/doc/todo/allow_site-wide_meta_definitions.mdwn
index 893498f2c09cfb0821b4474d78c433ca86ced42a..20c8c02acb06743543852d9cdd7efb00d61427f7 100644 (file)
--- a/doc/todo/allow_site-wide_meta_definitions.mdwn
+++ b/doc/todo/allow_site-wide_meta_definitions.mdwn
@@ -1,53 +1,106 @@
 [[!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 b229592..3132257 100644
+    index 6fe9cda..2f8c098 100644
     --- a/IkiWiki/Plugin/meta.pm
     +++ b/IkiWiki/Plugin/meta.pm
-    @@ -13,6 +13,7 @@ sub import {
+    @@ -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);
+    +  hook(type => "scan", id => "meta", call => \&scan)
+    +          if $config{"meta_defaults"};
      }
      
      sub getsetup () {
-    @@ -302,6 +303,15 @@ sub match {
+    @@ -305,6 +307,15 @@ sub match {
        }
      }
      
     +sub scan() {
     +  my %params = @_;
     +  my $page = $params{page};
-    +    foreach my $type (map { s/^meta_//; $_ } grep /^meta_/, keys %config) {
-    +          $pagestate{$page}{meta}{$type} = $config{"meta_$type"}
-    +                  unless defined $pagestate{$page}{meta}{$type};
+    +  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..200c4b2 100644
+    index 000f461..8d34ee4 100644
     --- a/doc/ikiwiki/directive/meta.mdwn
     +++ b/doc/ikiwiki/directive/meta.mdwn
-    @@ -12,6 +12,12 @@ also specifies some additional sub-parameters.
+    @@ -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, e.g.
+    +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_copyright => "Copyright 2007 by Joey Hess",
-    +  meta_license   => "GPL v2+",
+    +  meta_defaults = [
+    +          { copyright => "Copyright 2007 by Joey Hess" },
+    +          { license   => "GPL v2+" },
+    +          { link => "somepage", rel => "site entrypoint", },
+    +  ],
     +
      Supported fields: