+
+Also see [[!debbug 443346]].
+
+> Just a few quick thoughts about this:
+>
+>* I'm only thinking about write ACLs. As Joey noted, read ACLs need to be done in the web server.
+>* ACLs are going to be really hard for people with direct access to the revision control system.
+> Which means that we really only need to define ACLs for web access.
+>* ACLs for web access can then be defined by the web master. These might not need to be
+> defined in the wiki pages (although they could be).
+>* Given the previous two points, can't this be done with the `match_user()`
+> function defined by the [[plugins/attachment]] plugin (see the [[ikiwiki/pagespec/attachment]] pagespec info)
+> and the [[plugins/lockedit]] plugin?
+>
+> For example, add the following to your config file:
+>
+> locked_pages => '!(user(john) and */Discussion) and *',
+>
+> would lock all pages unless you're john and editing a Discussion page.
+> It's a thought anyway :-). -- [[Will]]
+
+>> Yes, writing per-user commit ACLs has become somewhat easier with recent
+>> features. Breaking `match_user` out of attachment, and making the
+>> lockedit plugin pass`user` and `ip` params when it calls `pagespec_match`
+>> would be sufficient. And [[done]], configurable via
+>> [[plugin/lockedit]]'s `locked_pages`. --[[Joey]]
+
+I am considering giving this a try, implementing it as a module.
+Here is how I see it:
+
+ * a new preprocessor directive allows to define ACL entries providing permissions
+ for a given (user, page, operation), as in:
+
+ <pre>
+ \[[!acl user=joe page=*.png allow=upload]]
+ \[[!acl user=bob page=/blog/bob/* allow=*]]
+ \[[!acl user=* page=/blog/bob/* deny=*]]
+ \[[!acl user=http://jeremie.koenig.myopenid.com/ page=/todo/* deny=create
+ reason="spends his time writing todo items instead of source code"]]
+ </pre>
+
+ Each would expand to a description of the resulting rule.
+
+ * a configurable page of the wiki would be used as an ACL list.
+ Possibly could refer to other ACL pages, as in:
+
+ <pre>
+ \[[!acl user=* page=/subsite/* acl=/subsite/acl.mdwn]]
+ </pre>