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getpid() isn't cached by glibc nowadays and system calls are
more expensive due to CPU vulnerability mitigations. To
ensure we switch to the new semantics properly, introduce
a new `on_destroy' function to simplify callers.
Furthermore, most OnDestroy correctness is often tied to the
process which creates it, so make the new API default to
guarded against running in subprocesses.
For cases which require running in all children, a new
PublicInbox::OnDestroy::all call is provided.
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This allows us to avoid repeatedly using memory-intensive
anonymous subs in CodeSearchIdx where the callback is assigned
frequently. Anonymous subs are known to leak memory in old
Perls (e.g. 5.16.3 in enterprise distros) and still expensive in
newer Perls. So favor the (\&subroutine, @args) form which
allows us to eliminate anonymous subs going forward.
Only CodeSearchIdx takes advantage of the new API at the moment,
since it's the biggest repeat user of post-loop callback
changes.
Getting rid of the subroutine and relying on a global `our'
variable also has two advantages:
1) Perl warnings can detect typos at compile-time, whereas the
(now gone) method could only detect errors at run-time.
2) `our' variable assignment can be `local'-ized to a scope
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I just did a double-take and nearly thought authentication
was broken while reading LeiConvert.pm. Add a comment in
LeiConvert.pm to clarify things, too.
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In case an IMAP folder is deleted, just set an error and
ignore it rather than creating an empty folder which we
attempt to export keywords to for non-existent messages.
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Since signalfd is often combined with our event loop, give it a
convenient API and reduce the code duplication required to use it.
EventLoop is replaced with ::event_loop to allow consistent
parameter passing and avoid needlessly passing the package name
on stack.
We also avoid exporting SFD_NONBLOCK since it's the only flag we
support. There's no sense in having the memory overhead of a
constant function when it's in cold code.
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It can be useful to test with some of these, but we can't enable
them universally for all servers (and debug + compress is gross)
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Untested at the moment(*), but we were inadvertantly truncating
mailbox names with '/' due to our work-in-progress handling of
"/;UID=$NUM" parameter.
(*) strangely, my dovecot instance doesn't allow '/' by default,
so the change to xt/net_writer-imap.t is untested.
Reported-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Link: https://public-inbox.org/meta/20210914175025.eq7s2shkc323itaf@meerkat.local/
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Since "lei up" is expected to be a heavily-used command,
better support for IMAP seems like a reasonable idea.
This is inefficient since we waste an IMAP(S) TCP connection
since it dies when an auth-only LeiUp worker process dies, but
it's better than not working at all, right now.
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That's the minimum, at least...
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It's unreasonable to expect UIDVALIDITY= to be specified in
command-line arguments. We'll also check for cases without
"$USER@" or ";AUTH=", since we accept those forms on the
command-line.
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We support writing to IMAP stores in other places (just like
Maildir), and it's actually less complex for us to write to
IMAP. Neither usability nor performance is ideal, but usability
will be addressed in the next commit to relax CLI argument
checking.
Performance is poor due to the synchronous Mail::IMAPClient
API and will need to be addressed with pipelining sometime
further in the future.
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Instead of "+FLAGS.SILENT" which merely adds to the keywords.
We store all keywords together, so it's unlikely we will rely
on the "+FLAGS.SILENT" or "-FLAGS.SILENT".
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Maildir and IMAP can both handle `forwarded'. Ensure we don't
lose `forwarded' when reading from stores which do not support
it, but ensure we can set it when reading from IMAP and Maildir
stores.
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This matches existing Maildir behavior, as trash and draft
messages have little reason to be exposed publicly.
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They're unnecessary visual noise, and angle brackets don't
always work as intended when going through Xapian's query
parser.
Since we already use "m:" and "refs:" instead of the actual
header names, it should be obvious we're at liberty to
abbreviate such things
Link: https://public-inbox.org/meta/20210304184348.GA19350@dcvr/
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IMAP is similar to Maildir and we can now preserve keyword
updates done on IMAP folders.
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eml ("message/rfc822" MIME type) is supported by "lei import",
so it probably makes sense to support via convert, at least
for tests. And IMAP support is supported in "lei q -o $MFOLDER",
so this only required renaming {nrd} => {net} and initializing
outputs before augment preparation (creating the IMAP folder)
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This flexibility should save us some code down-the-line.
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Augment (and dedupe) aren't parallel, yet, so its more sensitive to
high-latency networks.
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This interpolation is used by the upstream URI package
and we rely on it elsewhere for HTTP(S) URIs, so save
ourselves some surprises down the line.
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Requiring TEST_IMAP_WRITE_URL to be set to a writable IMAP
server URL isn't ideal, but it works for now until we have time
to setup a mock dovecot/cyrus/etc... instance for testing.
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