that the page links to, which is just what link dependencies are
triggered on.
+[[done]]
+ ----
+
+ ### the removal problem
+
+ So far I have not addressed fixing the removal problem (which Will
+ discusses above).
+
+ Summary of problem: A has a dependency on a pagespec such as
+ "bugs/* and !link(done)". B currently matches. Then B is updated,
+ in a way that makes A's dependency not match it (ie, it links to done).
+ Now A is not updated, because ikiwiki does not realize that it
+ depended on B before.
+
+ This was worked around to fix [[bugs/inline_page_not_updated_on_removal]]
+ by inline and map adding explicit dependencies on each page that appears
+ on them. Then a change to B triggers the explicit dep. While this works,
+ it's 1) ugly 2) probably not implemented by all plugins that could
+ be affected by this problem (ie, linkmap) and 3) is most of the reason why
+ we grew the complication of `depends_simple`.
+
+ One way to fix this is to include with each dependency, a list of pages
+ that currently match it. If the list changes, the dependency is triggered.
+
+ Should be doable, but seems to involve a more work than
+ currently. Consider that a dependency on "bugs/*" currently
+ is triggered by just checking until *one* page is found to match it.
+ But to store the list, *every* page would have to be tried against it.
+ Unless the list can somehow be intelligently updated, looking at only the
+ changed pages.