Single-threaded is the build-default, and seems to work well enough for
1.12.7, so remove the option to turn it off.
This is because build-options that influence such low-level/core
behavior are a pain to maintain.
In lazy-mode, we were skipping directories that did not change; however,
this didn't help for the case were users received new messages in big
maildirs.
So, add another check where we compare the ctime of message files with
the time of the last indexing operation. If it's smaller, ignore the
message-file. This is faster than having to consult the Xapian database
for each message.
Note that this requires in mu4e:
(setq mu4e-index-lazy-check t)
or
--lazy-check
as a parameter for 'mu index'.
It was a warning, but seems some users got it a lot (which is a sign
they're spending too much time indexing!); so let's demote it to a mere
message.
Issue #2778.
Try to update the query baseline if we're search for the favorite-query,
whether as a bookmark or an "organic" query, through a new function
mu4e--search-maybe-reset-baseline
Note that the query must string-match _exactly_, equivalence is not
enough.
Some cosmetic updates.
Fixes#2775.
This makes mu (/mu4e) use only single-threaded access to Xapian((*),
to avoid the problems with #2601 that some people are seeing.
In the mu4e UI, you'll see an '-st' suffix to the version, and
occasionally (hopefully not too often!) you get a warning from mu4e when
trying to talk to mu4e while indexing is underway,
"Cannot handle command while indexing, please retry later."
which means just what is says.
(*) unless you pass `-Dxapian-single-threaded=false` to meson.
Try to avoid multi-threaded operations with Xapian.
This remove the thread workers during indexing, and avoids the indexing
background thread. So, mu4e has to wait once again during indexing.
We can improve upon that, but first we need to know if it avoids the
problem of issue #2756.
The zero-width spaces are added by the `man-link` macro to ensure bold text
formatting when exporting from org, but they interfere with man page
functionality in Emacs.
It seems the older (<= emacs 28 at least) message-hide-headers caused
trouble when editing drafts with mu4e in some cases.
So use the _newer_ version of this function, imported as
mu4e--message-hide-headers.
Fixes#2661.
It's better to _not_ have auto-saves for your draft directory, but if
you do, ignore them at least in mu.
It may still trip up mbsync and friends, but not much we can do about
that.
Clean up the implementation a bit as well.
