[PATCH 3/4] lei up: support --all for IMAP folders

[Eric Wong <e@80x24.org>]

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.
---
 Documentation/lei-up.pod     |  15 ++++-
 lib/PublicInbox/LEI.pm       |  19 ++++---
 lib/PublicInbox/LeiAuth.pm   |  15 +++--
 lib/PublicInbox/LeiToMail.pm |   3 +-
 lib/PublicInbox/LeiUp.pm     | 104 ++++++++++++++++++++++-------------
 xt/net_writer-imap.t         |   1 +
 6 files changed, 102 insertions(+), 55 deletions(-)

diff --git a/Documentation/lei-up.pod b/Documentation/lei-up.pod
index cea0f619..ca4cf4fe 100644
--- a/Documentation/lei-up.pod
+++ b/Documentation/lei-up.pod
@@ -6,15 +6,24 @@ lei-up - update a saved search
 
 lei up [OPTIONS] OUTPUT
 
-lei up [OPTIONS] --all=TYPE
+lei up [OPTIONS] --all[=<local|remote>]
 
 =head1 DESCRIPTION
 
-Update the saved search at C<OUTPUT> or all saved searches of C<TYPE>
-(currently C<local> is the only supported value).
+Update the saved search at C<OUTPUT> or all saved searches.
 
 =head1 OPTIONS
 
+=over
+
+=item --all[=<local|remote>]
+
+C<--all> updates all saved searches (listed in L<lei-ls-search(1)>).
+C<--all=local> only updates local mailboxes, C<--all=remote> only
+updates remote mailboxes (currently C<imap://> and C<imaps://>).
+
+=back
+
 The following options, described in L<lei-q(1)>, are supported.
 
 =over
diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index bd44cfae..a258722e 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -605,16 +605,19 @@ sub incr {
 	$self->{counters}->{$field} += $nr;
 }
 
+sub pkt_ops {
+	my ($lei, $ops) = @_;
+	$ops->{'!'} = [ \&fail_handler, $lei ];
+	$ops->{'|'} = [ \&sigpipe_handler, $lei ];
+	$ops->{x_it} = [ \&x_it, $lei ];
+	$ops->{child_error} = [ \&child_error, $lei ];
+	$ops->{incr} = [ \&incr, $lei ];
+	$ops;
+}
+
 sub workers_start {
 	my ($lei, $wq, $jobs, $ops, $flds) = @_;
-	$ops = {
-		'!' => [ \&fail_handler, $lei ],
-		'|' => [ \&sigpipe_handler, $lei ],
-		'x_it' => [ \&x_it, $lei ],
-		'child_error' => [ \&child_error, $lei ],
-		'incr' => [ \&incr, $lei ],
-		($ops ? %$ops : ()),
-	};
+	$ops = pkt_ops($lei, { ($ops ? %$ops : ()) });
 	$ops->{''} //= [ $wq->can('_lei_wq_eof') || \&wq_eof, $lei ];
 	my $end = $lei->pkt_op_pair;
 	my $ident = $wq->{-wq_ident} // "lei-$lei->{cmd} worker";
diff --git a/lib/PublicInbox/LeiAuth.pm b/lib/PublicInbox/LeiAuth.pm
index 465a2758..9b09cecf 100644
--- a/lib/PublicInbox/LeiAuth.pm
+++ b/lib/PublicInbox/LeiAuth.pm
@@ -30,10 +30,16 @@ sub do_auth_atfork { # used by IPC WQ workers
 	return if $wq->{-wq_worker_nr} != 0; # only first worker calls this
 	my $lei = $wq->{lei};
 	my $net = $lei->{net};
+	if ($net->{-auth_done}) { # from previous worker... (ugly)
+		$lei->{pkt_op_p}->pkt_do('net_merge_continue', $net) or
+				$lei->fail("pkt_do net_merge_continue: $!");
+		return;
+	}
 	eval { # fill auth info (may prompt user or read netrc)
 		my $mics = $net->imap_common_init($lei);
 		my $nn = $net->nntp_common_init($lei);
 		# broadcast successful auth info to lei-daemon:
+		$net->{-auth_done} = 1;
 		$lei->{pkt_op_p}->pkt_do('net_merge_continue', $net) or
 				die "pkt_do net_merge_continue: $!";
 		$net->{mics_cached} = $mics if $mics;
@@ -51,14 +57,15 @@ sub net_merge_all { # called in wq worker via wq_broadcast
 # called by top-level lei-daemon when first worker is done with auth
 # passes updated net auth info to current workers
 sub net_merge_continue {
-	my ($wq, $net_new) = @_;
+	my ($wq, $lei, $net_new) = @_;
+	$wq->{-net_new} = $net_new; # for "lei up"
 	$wq->wq_broadcast('PublicInbox::LeiAuth::net_merge_all', $net_new);
-	$wq->net_merge_all_done; # defined per-WQ
+	$wq->net_merge_all_done($lei); # defined per-WQ
 }
 
 sub op_merge { # prepares PktOp->pair ops
-	my ($self, $ops, $wq) = @_;
-	$ops->{net_merge_continue} = [ \&net_merge_continue, $wq ];
+	my ($self, $ops, $wq, $lei) = @_;
+	$ops->{net_merge_continue} = [ \&net_merge_continue, $wq, $lei ];
 }
 
 sub new { bless \(my $x), __PACKAGE__ }
diff --git a/lib/PublicInbox/LeiToMail.pm b/lib/PublicInbox/LeiToMail.pm
index 2c7a92de..01f08384 100644
--- a/lib/PublicInbox/LeiToMail.pm
+++ b/lib/PublicInbox/LeiToMail.pm
@@ -396,7 +396,8 @@ sub new {
 	} elsif ($fmt =~ /\Aimaps?\z/) {
 		require PublicInbox::NetWriter;
 		require PublicInbox::URIimap;
-		my $net = PublicInbox::NetWriter->new;
+		# {net} may exist from "lei up" for auth
+		my $net = $lei->{net} // PublicInbox::NetWriter->new;
 		$net->{quiet} = $lei->{opt}->{quiet};
 		my $uri = PublicInbox::URIimap->new($dst)->canonical;
 		$net->add_url($$uri);
diff --git a/lib/PublicInbox/LeiUp.pm b/lib/PublicInbox/LeiUp.pm
index a39d6047..30358e9d 100644
--- a/lib/PublicInbox/LeiUp.pm
+++ b/lib/PublicInbox/LeiUp.pm
@@ -5,8 +5,14 @@
 package PublicInbox::LeiUp;
 use strict;
 use v5.10.1;
+# n.b. we use LeiInput to setup IMAP auth
+use parent qw(PublicInbox::IPC PublicInbox::LeiInput);
 use PublicInbox::LeiSavedSearch;
-use parent qw(PublicInbox::IPC);
+use PublicInbox::DS;
+use PublicInbox::PktOp;
+use PublicInbox::LeiFinmsg;
+use PublicInbox::LEI;
+my $REMOTE_RE = qr!\A(?:imap|http)s?://!i; # http(s) will be for JMAP
 
 sub up1 ($$) {
 	my ($lei, $out) = @_;
@@ -48,75 +54,95 @@ sub up1 ($$) {
 
 sub up1_redispatch {
 	my ($lei, $out, $op_p) = @_;
-	require PublicInbox::LeiFinmsg;
-	$lei->{fmsg} //= PublicInbox::LeiFinmsg->new($lei->{2});
 	my $l = bless { %$lei }, ref($lei);
 	$l->{opt} = { %{$l->{opt}} };
-	delete $l->{sock};
-	$l->{''} = $op_p; # daemon only
+	delete $l->{sock}; # do not close
+	$l->{''} = $op_p; # daemon only ($l => $lei => script/lei)
 
 	# make close($l->{1}) happy in lei->dclose
 	open my $fh, '>&', $l->{1} or return $l->child_error(0, "dup: $!");
+	local $PublicInbox::LEI::current_lei = $l;
 	$l->{1} = $fh;
 	eval {
 		$l->qerr("# updating $out");
 		up1($l, $out);
-		$l->qerr("# $out done");
 	};
-	$l->child_error(0, $@) if $@;
+	$lei->child_error(0, $@) if $@ || $l->{failed}; # lei->fail()
+}
+
+sub redispatch_all ($$) {
+	my ($self, $lei) = @_;
+	# re-dispatch into our event loop w/o creating an extra fork-level
+	$lei->{fmsg} = PublicInbox::LeiFinmsg->new($lei->{2});
+	my ($op_c, $op_p) = PublicInbox::PktOp->pair;
+	for my $o (@{$self->{local} // []}, @{$self->{remote} // []}) {
+		PublicInbox::DS::requeue(sub {
+			up1_redispatch($lei, $o, $op_p);
+		});
+	}
+	$lei->event_step_init;
+	$lei->pkt_ops($op_c->{ops} = { '' => [$lei->can('dclose'), $lei] });
 }
 
 sub lei_up {
 	my ($lei, @outs) = @_;
-	$lei->{lse} = $lei->_lei_store(1)->search;
 	my $opt = $lei->{opt};
-	my @local;
-	if (defined $opt->{all}) {
+	my $self = bless { -mail_sync => 1 }, __PACKAGE__;
+	$lei->{lse} = $lei->_lei_store(1)->write_prepare($lei)->search;
+	if (defined(my $all = $opt->{all})) {
 		return $lei->fail("--all and @outs incompatible") if @outs;
 		length($opt->{mua}//'') and return
 			$lei->fail('--all and --mua= are incompatible');
-
-		# supporting IMAP outputs is more involved due to
-		# git-credential prompts.  TODO: add this in 1.8
-		$opt->{all} eq 'local' or return
-			$lei->fail('only --all=local works at the moment');
-		my @all = PublicInbox::LeiSavedSearch::list($lei);
-		@local = grep(!m!\Aimaps?://!i, @all);
+		@outs = PublicInbox::LeiSavedSearch::list($lei);
+		if ($all eq 'local') {
+			$self->{local} = [ grep(!/$REMOTE_RE/, @outs) ];
+		} elsif ($all eq 'remote') {
+			$self->{remote} = [ grep(/$REMOTE_RE/, @outs) ];
+		} elsif ($all eq '') {
+			$self->{remote} = [ grep(/$REMOTE_RE/, @outs) ];
+			$self->{local} = [ grep(!/$REMOTE_RE/, @outs) ];
+		} else {
+			$lei->fail("only --all=$all not understood");
+		}
 	} else {
-		@local = @outs;
+		$self->{remote} = [ grep(/$REMOTE_RE/, @outs) ];
+		$self->{local} = [ grep(!/$REMOTE_RE/, @outs) ];
 	}
-	if (scalar(@outs) > 1) {
-		length($opt->{mua}//'') and return $lei->fail(<<EOM);
+	((@{$self->{local} // []} + @{$self->{remote} // []}) > 1 &&
+		length($opt->{mua} // '')) and return $lei->fail(<<EOM);
 multiple outputs and --mua= are incompatible
 EOM
-		# TODO:
-		return $lei->fail(<<EOM) if grep(m!\Aimaps?://!i, @outs);
-multiple destinations only supported for local outputs (FIXME)
-EOM
+	if ($self->{remote}) { # setup lei->{auth}
+		$self->prepare_inputs($lei, $self->{remote}) or return;
 	}
-	if (scalar(@local) > 1) {
-		$lei->_lei_store->write_prepare($lei); # share early
-		# daemon mode, re-dispatch into our event loop w/o
-		# creating an extra fork-level
-		require PublicInbox::DS;
-		require PublicInbox::PktOp;
-		my ($op_c, $op_p) = PublicInbox::PktOp->pair;
-		for my $o (@local) {
-			PublicInbox::DS::requeue(sub {
-				up1_redispatch($lei, $o, $op_p);
-			});
-		}
-		$lei->event_step_init;
-		$op_c->{ops} = { '' => [$lei->can('dclose'), $lei] };
+	if ($lei->{auth}) { # start auth worker
+		require PublicInbox::NetWriter;
+		bless $lei->{net}, 'PublicInbox::NetWriter';
+		$lei->{auth}->op_merge(my $ops = {}, $self, $lei);
+		(my $op_c, $ops) = $lei->workers_start($self, 1, $ops);
+		$lei->{wq1} = $self;
+		$lei->wait_wq_events($op_c, $ops);
+		# net_merge_all_done will fire when auth is done
 	} else {
-		up1($lei, $local[0]);
+		redispatch_all($self, $lei); # see below
 	}
 }
 
+# called in top-level lei-daemon when LeiAuth is done
+sub net_merge_all_done {
+	my ($self, $lei) = @_;
+	$lei->{net} = delete($self->{-net_new}) if $self->{-net_new};
+	$self->wq_close(1);
+	redispatch_all($self, $lei);
+}
+
 sub _complete_up {
 	my ($lei, @argv) = @_;
 	my $match_cb = $lei->complete_url_prepare(\@argv);
 	map { $match_cb->($_) } PublicInbox::LeiSavedSearch::list($lei);
 }
 
+no warnings 'once';
+*ipc_atfork_child = \&PublicInbox::LeiInput::input_only_atfork_child;
+
 1;
diff --git a/xt/net_writer-imap.t b/xt/net_writer-imap.t
index aeed3144..0a4cea68 100644
--- a/xt/net_writer-imap.t
+++ b/xt/net_writer-imap.t
@@ -242,6 +242,7 @@ EOM
 
 	lei_ok qw(q m:testmessage --no-external -o), $folder_url;
 	lei_ok qw(up), $folder_url;
+	lei_ok qw(up --all=remote);
 });
 
 undef $cleanup; # remove temporary folder