# Copyright (C) 2020-2021 all contributors
# License: AGPL-3.0+
# Combine any combination of PublicInbox::Search,
# PublicInbox::ExtSearch, and PublicInbox::LeiSearch objects
# into one Xapian DB
package PublicInbox::LeiXSearch;
use strict;
use v5.10.1;
use parent qw(PublicInbox::LeiSearch PublicInbox::IPC);
use PublicInbox::DS qw(now);
use PublicInbox::PktOp qw(pkt_do);
use File::Temp 0.19 (); # 0.19 for ->newdir
use File::Spec ();
use PublicInbox::Search qw(xap_terms);
use PublicInbox::Spawn qw(popen_rd spawn which);
use PublicInbox::MID qw(mids);
use PublicInbox::Smsg;
use PublicInbox::Eml;
use Fcntl qw(SEEK_SET F_SETFL O_APPEND O_RDWR);
sub new {
my ($class) = @_;
PublicInbox::Search::load_xapian();
bless {
qp_flags => $PublicInbox::Search::QP_FLAGS |
PublicInbox::Search::FLAG_PURE_NOT(),
}, $class
}
sub attach_external {
my ($self, $ibxish) = @_; # ibxish = ExtSearch or Inbox
my $desc = $ibxish->{inboxdir} // $ibxish->{topdir};
my $srch = $ibxish->search or
return warn("$desc not indexed for Xapian\n");
my @shards = $srch->xdb_shards_flat or
return warn("$desc has no Xapian shards\n");
if (delete $self->{xdb}) { # XXX: do we need this?
# clobber existing {xdb} if amending
my $expect = delete $self->{nshard};
my $shards = delete $self->{shards_flat};
scalar(@$shards) == $expect or die
"BUG: {nshard}$expect != shards=".scalar(@$shards);
my $prev = {};
for my $old_ibxish (@{$self->{shard2ibx}}) {
next if $prev == $old_ibxish;
$prev = $old_ibxish;
my @shards = $old_ibxish->search->xdb_shards_flat;
push @{$self->{shards_flat}}, @shards;
}
my $nr = scalar(@{$self->{shards_flat}});
$nr == $expect or die
"BUG: reloaded $nr shards, expected $expect"
}
push @{$self->{shards_flat}}, @shards;
push(@{$self->{shard2ibx}}, $ibxish) for (@shards);
}
# returns a list of local inboxes (or count in scalar context)
sub locals { @{$_[0]->{locals} // []} }
sub remotes { @{$_[0]->{remotes} // []} }
# called by PublicInbox::Search::xdb
sub xdb_shards_flat { @{$_[0]->{shards_flat} // []} }
# like over->get_art
sub smsg_for {
my ($self, $mitem) = @_;
# cf. https://trac.xapian.org/wiki/FAQ/MultiDatabaseDocumentID
my $nshard = $self->{nshard};
my $docid = $mitem->get_docid;
my $shard = ($docid - 1) % $nshard;
my $num = int(($docid - 1) / $nshard) + 1;
my $ibx = $self->{shard2ibx}->[$shard];
my $smsg = $ibx->over->get_art($num);
if (ref($ibx->can('msg_keywords'))) {
my $kw = xap_terms('K', $mitem->get_document);
$smsg->{kw} = [ sort keys %$kw ];
}
$smsg->{docid} = $docid;
$smsg;
}
sub recent {
my ($self, $qstr, $opt) = @_;
$opt //= {};
$opt->{relevance} //= -2;
$self->mset($qstr //= 'bytes:1..', $opt);
}
sub over {}
sub _mset_more ($$) {
my ($mset, $mo) = @_;
my $size = $mset->size;
$size >= $mo->{limit} && (($mo->{offset} += $size) < $mo->{limit});
}
# $startq will EOF when query_prepare is done augmenting and allow
# query_mset and query_thread_mset to proceed.
sub wait_startq ($) {
my ($lei) = @_;
my $startq = delete $lei->{startq} or return;
while (1) {
my $n = sysread($startq, my $query_prepare_done, 1);
if (defined $n) {
return if $n == 0; # no MUA
if ($query_prepare_done eq 'q') {
$lei->{opt}->{quiet} = 1;
delete $lei->{opt}->{verbose};
delete $lei->{-progress};
} else {
$lei->fail("$$ WTF `$query_prepare_done'");
}
return;
}
return $lei->fail("$$ wait_startq: $!") unless $!{EINTR};
}
}
sub mset_progress {
my $lei = shift;
return if $lei->{early_mua} || !$lei->{-progress};
if ($lei->{pkt_op_p}) {
pkt_do($lei->{pkt_op_p}, 'mset_progress', @_);
} else { # single lei-daemon consumer
my ($desc, $mset_size, $mset_total_est) = @_;
$lei->{-mset_total} += $mset_size;
$lei->qerr("# $desc $mset_size/$mset_total_est");
}
}
sub query_thread_mset { # for --threads
my ($self, $ibxish) = @_;
local $0 = "$0 query_thread_mset";
my $lei = $self->{lei};
my ($srch, $over) = ($ibxish->search, $ibxish->over);
my $desc = $ibxish->{inboxdir} // $ibxish->{topdir};
return warn("$desc not indexed by Xapian\n") unless ($srch && $over);
my $mo = { %{$lei->{mset_opt}} };
my $mset;
my $each_smsg = $lei->{ovv}->ovv_each_smsg_cb($lei, $ibxish);
do {
$mset = $srch->mset($mo->{qstr}, $mo);
mset_progress($lei, $desc, $mset->size,
$mset->get_matches_estimated);
my $ids = $srch->mset_to_artnums($mset, $mo);
my $ctx = { ids => $ids };
my $i = 0;
my %n2item = map { ($ids->[$i++], $_) } $mset->items;
while ($over->expand_thread($ctx)) {
for my $n (@{$ctx->{xids}}) {
my $smsg = $over->get_art($n) or next;
wait_startq($lei);
my $mitem = delete $n2item{$smsg->{num}};
$each_smsg->($smsg, $mitem);
}
@{$ctx->{xids}} = ();
}
} while (_mset_more($mset, $mo));
undef $each_smsg; # drops @io for l2m->{each_smsg_done}
$lei->{ovv}->ovv_atexit_child($lei);
}
sub query_mset { # non-parallel for non-"--threads" users
my ($self) = @_;
local $0 = "$0 query_mset";
my $lei = $self->{lei};
my $mo = { %{$lei->{mset_opt}} };
my $mset;
for my $loc (locals($self)) {
attach_external($self, $loc);
}
my $each_smsg = $lei->{ovv}->ovv_each_smsg_cb($lei, $self);
do {
$mset = $self->mset($mo->{qstr}, $mo);
mset_progress($lei, 'xsearch', $mset->size,
$mset->size, $mset->get_matches_estimated);
for my $mitem ($mset->items) {
my $smsg = smsg_for($self, $mitem) or next;
wait_startq($lei);
$each_smsg->($smsg, $mitem);
}
} while (_mset_more($mset, $mo));
undef $each_smsg; # drops @io for l2m->{each_smsg_done}
$lei->{ovv}->ovv_atexit_child($lei);
}
sub each_eml { # callback for MboxReader->mboxrd
my ($eml, $self, $lei, $each_smsg) = @_;
my $smsg = bless {}, 'PublicInbox::Smsg';
$smsg->populate($eml);
$smsg->parse_references($eml, mids($eml));
$smsg->{$_} //= '' for qw(from to cc ds subject references mid);
delete @$smsg{qw(From Subject -ds -ts)};
wait_startq($lei);
if ($lei->{-progress}) {
++$lei->{-nr_remote_eml};
my $now = now();
my $next = $lei->{-next_progress} //= ($now + 1);
if ($now > $next) {
$lei->{-next_progress} = $now + 1;
my $nr = $lei->{-nr_remote_eml};
$lei->err("# $lei->{-current_url} $nr/?");
}
}
$each_smsg->($smsg, undef, $eml);
}
sub query_remote_mboxrd {
my ($self, $uris) = @_;
local $0 = "$0 query_remote_mboxrd";
local $SIG{TERM} = sub { exit(0) }; # for DESTROY (File::Temp, $reap)
my $lei = $self->{lei};
my ($opt, $env) = @$lei{qw(opt env)};
my @qform = (q => $lei->{mset_opt}->{qstr}, x => 'm');
push(@qform, t => 1) if $opt->{threads};
my $verbose = $opt->{verbose};
my ($reap_tail, $reap_curl);
my $cerr = File::Temp->new(TEMPLATE => 'curl.err-XXXX', TMPDIR => 1);
fcntl($cerr, F_SETFL, O_APPEND|O_RDWR) or warn "set O_APPEND: $!";
my $rdr = { 2 => $cerr, pgid => 0 };
my $sigint_reap = $lei->can('sigint_reap');
if ($verbose) {
# spawn a process to force line-buffering, otherwise curl
# will write 1 character at-a-time and parallel outputs
# mmmaaayyy llloookkk llliiikkkeee ttthhhiiisss
my $o = { 1 => $lei->{2}, 2 => $lei->{2}, pgid => 0 };
my $pid = spawn(['tail', '-f', $cerr->filename], undef, $o);
$reap_tail = PublicInbox::OnDestroy->new($sigint_reap, $pid);
}
my $curl = PublicInbox::LeiCurl->new($lei, $self->{curl}) or return;
push @$curl, '-s', '-d', '';
my $each_smsg = $lei->{ovv}->ovv_each_smsg_cb($lei);
for my $uri (@$uris) {
$lei->{-current_url} = $uri->as_string;
$lei->{-nr_remote_eml} = 0;
$uri->query_form(@qform);
my $cmd = $curl->for_uri($lei, $uri);
$lei->qerr("# $cmd");
my ($fh, $pid) = popen_rd($cmd, $env, $rdr);
$reap_curl = PublicInbox::OnDestroy->new($sigint_reap, $pid);
$fh = IO::Uncompress::Gunzip->new($fh);
PublicInbox::MboxReader->mboxrd($fh, \&each_eml, $self,
$lei, $each_smsg);
my $err = waitpid($pid, 0) == $pid ? undef
: "BUG: waitpid($cmd): $!";
@$reap_curl = (); # cancel OnDestroy
die $err if $err;
if ($? == 0) {
my $nr = $lei->{-nr_remote_eml};
mset_progress($lei, $lei->{-current_url}, $nr, $nr);
next;
}
$err = '';
if (-s $cerr) {
seek($cerr, 0, SEEK_SET) or
$lei->err("seek($cmd stderr): $!");
$err = do { local $/; <$cerr> } //
"read($cmd stderr): $!";
truncate($cerr, 0) or
$lei->err("truncate($cmd stderr): $!");
}
next if (($? >> 8) == 22 && $err =~ /\b404\b/);
$uri->query_form(q => $lei->{mset_opt}->{qstr});
$lei->child_error($?, "E: <$uri> $err");
}
undef $each_smsg;
$lei->{ovv}->ovv_atexit_child($lei);
}
# called by LeiOverview::each_smsg_cb
sub git { $_[0]->{git_tmp} // die 'BUG: caller did not set {git_tmp}' }
sub git_tmp ($) {
my ($self) = @_;
my (%seen, @dirs);
my $tmp = File::Temp->newdir("lei_xsearch_git.$$-XXXX", TMPDIR => 1);
for my $ibxish (locals($self)) {
my $d = File::Spec->canonpath($ibxish->git->{git_dir});
$seen{$d} //= push @dirs, "$d/objects\n"
}
my $git_dir = $tmp->dirname;
PublicInbox::Import::init_bare($git_dir);
my $f = "$git_dir/objects/info/alternates";
open my $alt, '>', $f or die "open($f): $!";
print $alt @dirs or die "print $f: $!";
close $alt or die "close $f: $!";
my $git = PublicInbox::Git->new($git_dir);
$git->{-tmp} = $tmp;
$git;
}
sub xsearch_done_wait { # dwaitpid callback
my ($arg, $pid) = @_;
my ($wq, $lei) = @$arg;
$lei->child_error($?, 'non-fatal error from '.ref($wq)) if $?;
}
sub query_done { # EOF callback for main daemon
my ($lei) = @_;
my $l2m = delete $lei->{l2m};
$l2m->wq_wait_old(\&xsearch_done_wait, $lei) if $l2m;
if (my $lxs = delete $lei->{lxs}) {
$lxs->wq_wait_old(\&xsearch_done_wait, $lei);
}
$lei->{ovv}->ovv_end($lei);
if ($l2m) { # close() calls LeiToMail reap_compress
if (my $out = delete $lei->{old_1}) {
if (my $mbout = $lei->{1}) {
close($mbout) or return $lei->fail(<<"");
Error closing $lei->{ovv}->{dst}: $!
}
$lei->{1} = $out;
}
if ($l2m->lock_free) {
$l2m->poke_dst;
$lei->poke_mua;
} else { # mbox users
$lei->start_mua;
}
}
$lei->{-progress} and
$lei->err('# ', $lei->{-mset_total} // 0, " matches");
$lei->dclose;
}
sub do_post_augment {
my ($lei) = @_;
my $l2m = $lei->{l2m};
my $err;
if ($l2m) {
eval { $l2m->post_augment($lei) };
$err = $@;
if ($err) {
if (my $lxs = delete $lei->{lxs}) {
$lxs->wq_kill;
$lxs->wq_close(0, undef, $lei);
}
$lei->fail("$err");
}
}
if (!$err && delete $lei->{early_mua}) { # non-augment case
$lei->start_mua;
}
close(delete $lei->{au_done}); # triggers wait_startq in lei_xsearch
}
my $MAX_PER_HOST = 4;
sub concurrency {
my ($self, $opt) = @_;
my $nl = $opt->{threads} ? locals($self) : 1;
my $nr = remotes($self);
$nr = $MAX_PER_HOST if $nr > $MAX_PER_HOST;
$nl + $nr;
}
sub start_query { # always runs in main (lei-daemon) process
my ($self, $lei) = @_;
if ($lei->{opt}->{threads}) {
for my $ibxish (locals($self)) {
$self->wq_io_do('query_thread_mset', [], $ibxish);
}
} elsif (locals($self)) {
$self->wq_io_do('query_mset', []);
}
my $i = 0;
my $q = [];
for my $uri (remotes($self)) {
push @{$q->[$i++ % $MAX_PER_HOST]}, $uri;
}
for my $uris (@$q) {
$self->wq_io_do('query_remote_mboxrd', [], $uris);
}
}
sub ipc_atfork_child {
my ($self) = @_;
$self->{lei}->lei_atfork_child;
$SIG{__WARN__} = PublicInbox::Eml::warn_ignore_cb();
$self->SUPER::ipc_atfork_child;
}
sub query_prepare { # called by wq_io_do
my ($self) = @_;
local $0 = "$0 query_prepare";
my $lei = $self->{lei};
eval { $lei->{l2m}->do_augment($lei) };
$lei->fail($@) if $@;
pkt_do($lei->{pkt_op_p}, '.') == 1 or die "do_post_augment trigger: $!"
}
sub do_query {
my ($self, $lei) = @_;
my $ops = {
'|' => [ $lei->can('sigpipe_handler'), $lei ],
'!' => [ $lei->can('fail_handler'), $lei ],
'.' => [ \&do_post_augment, $lei ],
'' => [ \&query_done, $lei ],
'mset_progress' => [ \&mset_progress, $lei ],
'x_it' => [ $lei->can('x_it'), $lei ],
'child_error' => [ $lei->can('child_error'), $lei ],
};
($lei->{pkt_op_c}, $lei->{pkt_op_p}) = PublicInbox::PktOp->pair($ops);
$lei->{1}->autoflush(1);
$lei->start_pager if delete $lei->{need_pager};
$lei->{ovv}->ovv_begin($lei);
my $l2m = $lei->{l2m};
if ($l2m) {
$l2m->pre_augment($lei);
if ($lei->{opt}->{augment} && delete $lei->{early_mua}) {
$lei->start_mua;
}
$l2m->wq_workers_start('lei2mail', $l2m->{jobs},
$lei->oldset, { lei => $lei });
pipe($lei->{startq}, $lei->{au_done}) or die "pipe: $!";
# 1031: F_SETPIPE_SZ
fcntl($lei->{startq}, 1031, 4096) if $^O eq 'linux';
}
if (!$lei->{opt}->{threads} && locals($self)) { # for query_mset
# lei->{git_tmp} is set for wq_wait_old so we don't
# delete until all lei2mail + lei_xsearch workers are reaped
$lei->{git_tmp} = $self->{git_tmp} = git_tmp($self);
}
$self->wq_workers_start('lei_xsearch', $self->{jobs},
$lei->oldset, { lei => $lei });
my $op = delete $lei->{pkt_op_c};
delete $lei->{pkt_op_p};
$l2m->wq_close(1) if $l2m;
$lei->event_step_init; # wait for shutdowns
$self->wq_io_do('query_prepare', []) if $l2m; # for augment/dedupe
start_query($self, $lei);
$self->wq_close(1); # lei_xsearch workers stop when done
if ($lei->{oneshot}) {
while ($op->{sock}) { $op->event_step }
}
}
sub add_uri {
my ($self, $uri) = @_;
if (my $curl = $self->{curl} //= which('curl') // 0) {
require PublicInbox::MboxReader;
require IO::Uncompress::Gunzip;
require PublicInbox::LeiCurl;
push @{$self->{remotes}}, $uri;
} else {
warn "curl missing, ignoring $uri\n";
}
}
sub prepare_external {
my ($self, $loc, $boost) = @_; # n.b. already ordered by boost
if (ref $loc) { # already a URI, or PublicInbox::Inbox-like object
return add_uri($self, $loc) if $loc->can('scheme');
} elsif ($loc =~ m!\Ahttps?://!) {
require URI;
return add_uri($self, URI->new($loc));
} elsif (-f "$loc/ei.lock") {
require PublicInbox::ExtSearch;
$loc = PublicInbox::ExtSearch->new($loc);
} elsif (-f "$loc/inbox.lock" || -d "$loc/public-inbox") {
require PublicInbox::Inbox; # v2, v1
$loc = bless { inboxdir => $loc }, 'PublicInbox::Inbox';
} else {
warn "W: ignoring $loc, unable to determine type\n";
return;
}
push @{$self->{locals}}, $loc;
}
1;