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-rw-r--r--lib/PublicInbox/DirIdle.pm50
1 files changed, 50 insertions, 0 deletions
diff --git a/lib/PublicInbox/DirIdle.pm b/lib/PublicInbox/DirIdle.pm
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+++ b/lib/PublicInbox/DirIdle.pm
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+# Copyright (C) 2020 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# Used by public-inbox-watch for Maildir (and possibly MH in the future)
+package PublicInbox::DirIdle;
+use strict;
+use base 'PublicInbox::DS';
+use fields qw(inot);
+use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
+use PublicInbox::In2Tie;
+
+my ($MAIL_IN, $ino_cls);
+if ($^O eq 'linux' && eval { require Linux::Inotify2; 1 }) {
+        $MAIL_IN = Linux::Inotify2::IN_MOVED_TO() |
+                Linux::Inotify2::IN_CREATE();
+        $ino_cls = 'Linux::Inotify2';
+} elsif (eval { require PublicInbox::KQNotify }) {
+        $MAIL_IN = PublicInbox::KQNotify::MOVED_TO_OR_CREATE();
+        $ino_cls = 'PublicInbox::KQNotify';
+} else {
+        require PublicInbox::FakeInotify;
+        $MAIL_IN = PublicInbox::FakeInotify::MOVED_TO_OR_CREATE();
+}
+
+sub new {
+        my ($class, $dirs, $cb) = @_;
+        my $self = fields::new($class);
+        my $inot;
+        if ($ino_cls) {
+                $inot = $ino_cls->new or die "E: $ino_cls->new: $!";
+                my $io = PublicInbox::In2Tie::io($inot);
+                $self->SUPER::new($io, EPOLLIN | EPOLLET);
+        } else {
+                require PublicInbox::FakeInotify;
+                $inot = PublicInbox::FakeInotify->new; # starts timer
+        }
+
+        # Linux::Inotify2->watch or similar
+        $inot->watch($_, $MAIL_IN, $cb) for @$dirs;
+        $self->{inot} = $inot;
+        $self;
+}
+
+sub event_step {
+        my ($self) = @_;
+        eval { $self->{inot}->poll }; # Linux::Inotify2::poll
+        warn "$self->{inot}->poll err: $@\n" if $@;
+}
+
+1;