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This will be used for keyword (and label) storage for externals.
We'll be using this to ensure we don't redundantly auto-import
messages into lei/store if they're already in a local external
(they can still be imported explicitly via "lei import").
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Unused as of commit dda8237aeb5722b3a48c31896d9b7398e50823f1
("lei_to_mail: prepare for worker offload") when we switched
to using the LeiOverview output lock.
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This allows us to avoid repeated open() and close() syscalls
and speeds up the new xt/stress-sharedkv.t maintainer test
by roughly 7%.
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Most writes to stdout aren't atomic and we need locking to
prevent workers from interleaving and corrupting JSON output.
The one case stdout won't require locking is if it's pointed
to a regular file with O_APPEND; as POSIX O_APPEND semantics
guarantees atomicity.
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Using "make update-copyrights" after setting GNULIB_PATH in my
config.mak
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Since we'll be forking for Xapian indexing and maybe
other places, having a simple guard in place to ensure
OnDestroy doesn't unexpectedly unlink files or similar
is a safer option.
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--augment will match the mairix(1) option of the same
name to augment existing search results. We'll need
to implement deduplication for a better user experience.
mutt ships with compressed mbox support for bz2 and xz,
at least, so we'll support those out-of-the-box.
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This is intended for maintaining Maildir states, mbox message
deduplication, but may be useful for other purposes...
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v?fork failures seems to be the cause of locks not getting
released in -watch. Ensure lock release doesn't get skipped
in ->done for both v1 and v2 inboxes. We also need to do
everything we can to ensure DB handles, pipes and processes
get released even in the face of failure.
While we're at it, make failures around `git update-server-info'
non-fatal, since smart HTTP seems more popular anyways.
v2 changes:
- spawn: show failing command
- ensure waitpid is synchronous for inotify events
- teardown all fast-import processes on exception,
not just the failing one
- beef up lock_release error handling
- release lock on fast-import spawn failure
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This ought to be useful for diagnosing bugs in -watch.
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We can reduce the amount of platform-specific code by always
relying on IN_MODIFY/NOTE_WRITE notifications from lock release.
This reduces the number of times our read-only daemons will
need to wake up when -watch sees no-op message changes
(e.g. replied, seen, recent flag changes).
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This will be used to implement IMAP IDLE, first.
Eventually, it may be used to trigger other things:
* incremental internal updates for manifest.js.gz
* restart `git cat-file' processes on pack index unlink
* IMAP IDLE-like long-polling HTTP endpoint
And maybe more things we haven't thought of, yet.
It uses Linux::Inotify2 or IO::KQueue depending on what packages
are installed and what the kernel supports. It falls back to
nanosecond-aware Time::HiRes::stat() (available with Perl 5.10.0+)
on systems lacking Linux::Inotify2 and IO::KQueue.
In the future, a pure Perl alternative to Linux::Inotify2 may be
supplied for users of architectures we already support signalfd
and epoll on.
v2 changes:
- avoid O_TRUNC on lock file
- change ctime on Linux systems w/o inotify
- fix naming of comments and fields
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I didn't wait until September to do it, this year!
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This reduces code duplication needed for locking and
and hopefully makes things easier to understand.
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