X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/ec9b0a628d5daafdff27ef711bda3b22be4b0009..4a09619a79487df3a343284d96b7228c86e36a60:/doc/todo/allow_site-wide_meta_definitions.mdwn?ds=sidebyside diff --git a/doc/todo/allow_site-wide_meta_definitions.mdwn b/doc/todo/allow_site-wide_meta_definitions.mdwn index 5b7a5bea5..7129a44ac 100644 --- a/doc/todo/allow_site-wide_meta_definitions.mdwn +++ b/doc/todo/allow_site-wide_meta_definitions.mdwn @@ -1,44 +1,192 @@ +[[!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[[!tag patch]] to achieve this (also in the "defaultmeta" branch of -my github ikiwiki fork): + + +-- [[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! + +>>> Well, re that hunk, taint checking is currently disabled, but +>>> if the perl bug that disallows it is fixed and it is turned back on, +>>> the hash values will remain tainted, which will probably lead to +>>> problems. +>>> +>>> I'm also leery of using such a complex data structure in config. +>>> The websetup plugin would be hard pressed to provide a UI for such a +>>> data structure. (It lacks even UI for a single hash ref yet, let alone +>>> a list.) +>>> +>>> Also, it seems sorta wrong to have two so very different syntaxes to +>>> represent the same meta data. A user without a lot of experience will +>>> be hard pressed to map from a directive to this in the setup file. +>>> +>>> All of which leads me to think the setup file could just contain +>>> a text that could hold meta directives. Which generalizes really to +>>> a text that contains any directives, and is, perhaps appended to the +>>> top of every page. Which nearly generalizes to the sidebar plugin, +>>> or perhaps something more general than that... +>>> +>>> However, excessive generalization is the root of all evil, so +>>> I'm not necessarily saying that's a good idea. Indeed, my memory +>>> concerns below invalidate this idea pretty well. --[[Joey]] diff --git a/IkiWiki/Plugin/meta.pm b/IkiWiki/Plugin/meta.pm - index b229592..a307db4 100644 + index 6fe9cda..2f8c098 100644 --- a/IkiWiki/Plugin/meta.pm +++ b/IkiWiki/Plugin/meta.pm - @@ -13,6 +13,7 @@ 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); + @@ -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 () { - @@ -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}; - + } + + 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 ($$;@) { - @@ -324,4 +334,5 @@ sub match_copyright ($$;@) { - IkiWiki::Plugin::meta::match("copyright", @_); + 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 `"` 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. +>> +>>> I generally agree with this. It is *possible* that meta would have a new +>>> field added, that takes parameters and make sense to use globally. +>>> --[[Joey]] +>> +>> 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 + --- a/IkiWiki/Plugin/meta.pm + +++ b/IkiWiki/Plugin/meta.pm + @@ -13,6 +13,7 @@ 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); + } + + sub getsetup () { + @@ -302,6 +303,15 @@ 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}; + + } + +} + - 1 + package IkiWiki::PageSpec; + + sub match_title ($$;@) { diff --git a/doc/ikiwiki/directive/meta.mdwn b/doc/ikiwiki/directive/meta.mdwn index 000f461..200c4b2 100644 --- a/doc/ikiwiki/directive/meta.mdwn @@ -50,11 +198,40 @@ my github ikiwiki fork): +You can also define site-wide defaults for meta values by including them +in your setup file, e.g. + - + meta_copyright => "Copyright 2007 by Joey Hess", - + meta_license => "GPL v2+", + + meta_copyright => "Copyright 2007 by Joey Hess", + + meta_license => "GPL v2+", + Supported fields: * title -- [[Jon]] + +>>> Merry Christmas/festive season/happy new year folks. I've been away from +>>> ikiwiki for the break, and now I've returned to watching recentchanges. +>>> Hopefully I'll be back in the mix soon, too. In the meantime, Joey, have +>>> you had a chance to look at this yet? -- [[Jon]] + +>>>> Ping :) Hi. [[Joey]], would you consider this patch for the next +>>>> ikiwiki release? -- [[Jon]] + +>>> For this to work with websetup and --dumpsetup, it needs to define the +>>> `meta_*` settings in the getsetup function. +>>> +>>> I also have some concerns about both these patches, since both throw +>>> a lot of redundant data at meta, which then stores it in a very redundant +>>> way. Specifically, meta populates a per-page `%metaheaders` hash +>>> as well as storing per-page metadata in `%pagestate`. So, if you have +>>> a wiki with 10 thousand pages, and you add a 1k site-wide license text, +>>> that will bloat the memory usage of ikiwiki by in excess of 2 +>>> megabytes. It will also cause ikiwiki to write a similar amount more data +>>> to its state file which has to be loaded back in each +>>> run. +>>> +>>> Seems that this could be managed much more efficiently by having +>>> meta special-case the site-wide settings, not store them in these +>>> per-page data structures, and just make them be used if no per-page +>>> metadata of the given type is present. --[[Joey]] + +>>>> Thanks for the review - these are all valid points. I'll get working +>>>> on a revised patch. -- [[Jon]]