Besides being wrong to do, this could lead to the wrong item
being expired, as follows: If B is added and at the same time
A is changed, then A's ctime may be set to the current time,
while B's is set to its creation time. Thus the new item, A,
is incorrectly removed as older.
(This interacted especially badly with the bug fixed by
90b4d079605b72bb50d1da41402d994960e10937.)
The aggregate state merge code neglected to merge changes to the md5
field of an item. Therefore, if an item's md5 changed after initial
aggregation, it would be updated, and rewritten, each time thereafter.
This was wasteful and indirectly led to some expire problems.
See [[bugs/Aggregated_Atom_feeds_are_double-encoded]]. By default,
XML::Atom outputs strings of UTF-8 bytes with the Perl UTF8 flag stripped
off, which IkiWiki assumes to be Latin-1 and re-encodes as UTF-8 on
output. XML::Feed does not currently (0.41-1) set the magic variable to
change this behaviour (I've filed a bug on CPAN), but IkiWiki can
usefully set the same variable as a workaround.
holger reported that decode_utf8 was crashing with perl 5.8.8. Earlier, I
thought that passing 0 to the function avoided this with old perls, but
that was apparently not enough, it still crashes. So, put it inside the
eval, so we can at least recover from it crashing.
newpagefile.
Note that newpagefile is not used here (or in recentchanges) because
the internal use pages they generate are transient and unlikely to
benefit from being put each in their own subdir.
I saw this in the wild, apparently a page was not present on disk, but was
in the aggregate db, and not marked as expired either. Not sure how that
happened, but such pages should get marked as expired since they have an
effectively zero ctime.
Usage:
1. Update all pagespecs that use aggregated pages to use internal()
2. ikiwiki-transition aggregateinternal $srcdir $htmlext
(where $srcdir and $htmlext are the srcdir and htmlext options in
your .setup file)
3. Add aggregateinternal to your .setup file
4. Rebuild the wiki
This addresses <http://ikiwiki.info/todo/aggregate_to_internal_pages/>
in a simple way. With this approach, a flag day is required, on which all
users of aggregated pages start to inline them using the internal() pagespec;
after that, the aggregateinternal option can safely be switched on in the
setup file (and the old aggregated pages can be deleted by hand).
Now aggregation will not lock the wiki. Any changes made during aggregaton are
merged in with the changed state accumulated while aggregating. A separate
lock file prevents multiple concurrent aggregators. Garbage collection
of orphaned guids is much improved. loadstate() is only called once
per process, so tricky support for reloading wiki state is not needed.
(Tested fairly thuroughly.)
Joey Hess
Joey Hess
Simon McVittie
Joey Hess
Simon McVittie
Simon McVittie
Bernd Zeimetz