update

[ikiwiki.git] / doc / bugs / transitive_dependencies.mdwn

diff --git a/doc/bugs/transitive_dependencies.mdwn b/doc/bugs/transitive_dependencies.mdwn
index e3043b61bd8965a294b58c4ad4306832bcb9c896..9586bc9b02767a29ceaaa5050a034a6b0f0fff45 100644 (file)
--- a/doc/bugs/transitive_dependencies.mdwn
+++ b/doc/bugs/transitive_dependencies.mdwn
@@ -1,5 +1,5 @@
 If a sidebar contains a map, or inline (etc), one would expect a
-change/add/remove of any of the mapped/inlined pages to cause a full wiki
+add/remove of any of the mapped/inlined pages to cause a full wiki
 rebuild. But this does not happen.
 
 If page A inlines page B, which inlines page C, a change to C will cause B
@@ -51,12 +51,18 @@ Downsides here:
 * Means a minimum of 2x as much time spent resolving dependencies,
   at least in my simple implementation, which re-runs the dependency
   resolution loop until no new pages are rebuilt.
+  (I added an optimisation that gets it down to 1.5X as much work on
+  average, still 2x as much worst case. I suppose building a directed
+  graph and traversing it would be theoretically more efficient.)
 * Causes extra work for some transitive dependencies that we don't
-  actually care about. For example, changing index causes
+  actually care about. This is amelorated, but not solved by 
+  the current work on [[todo/dependency_types]].
+  For example, changing index causes
   plugins/brokenlinks to update in the first pass; if there's a second
-  pass, plugins/map is then updated, because it depends on plugins/brokenlinks.
+  pass, plugins/map is no longer updated (contentless dependencies FTW),
+  but plugins is, because it depends on plugins/brokenlinks.
   (Of course, this is just a special case of the issue that a real
-  modification to plugins/brokenlinks causes an unnecessary update of plugins/map,
-  because we have only one kind of dependency.)
+  modification to plugins/brokenlinks causes an unnecessary update of
+  plugins, and could be solved by adding more dependency types.)
 
 --[[Joey]]