# Copyright (C) 2018-2020 all contributors
# License: AGPL-3.0+
# This interface wraps and mimics PublicInbox::Import
# Used to write to V2 inboxes (see L).
package PublicInbox::V2Writable;
use strict;
use v5.10.1;
use parent qw(PublicInbox::Lock);
use PublicInbox::SearchIdxShard;
use PublicInbox::Eml;
use PublicInbox::Git;
use PublicInbox::Import;
use PublicInbox::MID qw(mids references);
use PublicInbox::ContentHash qw(content_hash content_digest);
use PublicInbox::InboxWritable;
use PublicInbox::OverIdx;
use PublicInbox::Msgmap;
use PublicInbox::Spawn qw(spawn popen_rd);
use PublicInbox::SearchIdx qw(log2stack crlf_adjust is_ancestor check_size);
use IO::Handle; # ->autoflush
use File::Temp ();
my $OID = qr/[a-f0-9]{40,}/;
# an estimate of the post-packed size to the raw uncompressed size
my $PACKING_FACTOR = 0.4;
# SATA storage lags behind what CPUs are capable of, so relying on
# nproc(1) can be misleading and having extra Xapian shards is a
# waste of FDs and space. It can also lead to excessive IO latency
# and slow things down. Users on NVME or other fast storage can
# use the NPROC env or switches in our script/public-inbox-* programs
# to increase Xapian shards
our $NPROC_MAX_DEFAULT = 4;
sub detect_nproc () {
# getconf(1) is POSIX, but *NPROCESSORS* vars are not
for (qw(_NPROCESSORS_ONLN NPROCESSORS_ONLN)) {
`getconf $_ 2>/dev/null` =~ /^(\d+)$/ and return $1;
}
for my $nproc (qw(nproc gnproc)) { # GNU coreutils nproc
`$nproc 2>/dev/null` =~ /^(\d+)$/ and return $1;
}
# should we bother with `sysctl hw.ncpu`? Those only give
# us total processor count, not online processor count.
undef
}
sub nproc_shards ($) {
my ($creat_opt) = @_;
my $n = $creat_opt->{nproc} if ref($creat_opt) eq 'HASH';
$n //= $ENV{NPROC};
if (!$n) {
# assume 2 cores if not detectable or zero
state $NPROC_DETECTED = detect_nproc() || 2;
$n = $NPROC_DETECTED;
$n = $NPROC_MAX_DEFAULT if $n > $NPROC_MAX_DEFAULT;
}
# subtract for the main process and git-fast-import
$n -= 1;
$n < 1 ? 1 : $n;
}
sub count_shards ($) {
my ($self) = @_;
$self->{ibx} ? do {
# always load existing shards in case core count changes:
# Also, shard count may change while -watch is running
my $srch = $self->{ibx}->search or return 0;
delete $self->{ibx}->{search};
$srch->{nshard} // 0
} : $self->{nshard}; # self->{nshard} is for ExtSearchIdx
}
sub new {
# $creat may be any true value, or 0/undef. A hashref is true,
# and $creat->{nproc} may be set to an integer
my ($class, $v2ibx, $creat) = @_;
$v2ibx = PublicInbox::InboxWritable->new($v2ibx);
my $dir = $v2ibx->assert_usable_dir;
unless (-d $dir) {
if ($creat) {
require File::Path;
File::Path::mkpath($dir);
} else {
die "$dir does not exist\n";
}
}
$v2ibx->umask_prepare;
my $xpfx = "$dir/xap" . PublicInbox::Search::SCHEMA_VERSION;
my $self = {
ibx => $v2ibx,
im => undef, # PublicInbox::Import
parallel => 1,
transact_bytes => 0,
total_bytes => 0,
current_info => '',
xpfx => $xpfx,
oidx => PublicInbox::OverIdx->new("$xpfx/over.sqlite3"),
lock_path => "$dir/inbox.lock",
# limit each git repo (epoch) to 1GB or so
rotate_bytes => int((1024 * 1024 * 1024) / $PACKING_FACTOR),
last_commit => [], # git epoch -> commit
};
$self->{oidx}->{-no_fsync} = 1 if $v2ibx->{-no_fsync};
$self->{shards} = count_shards($self) || nproc_shards($creat);
bless $self, $class;
}
# public (for now?)
sub init_inbox {
my ($self, $shards, $skip_epoch, $skip_artnum) = @_;
if (defined $shards) {
$self->{parallel} = 0 if $shards == 0;
$self->{shards} = $shards if $shards > 0;
}
$self->idx_init;
$self->{mm}->skip_artnum($skip_artnum) if defined $skip_artnum;
my $epoch_max = -1;
$self->{ibx}->git_dir_latest(\$epoch_max);
if (defined $skip_epoch && $epoch_max == -1) {
$epoch_max = $skip_epoch;
}
$self->git_init($epoch_max >= 0 ? $epoch_max : 0);
$self->done;
}
# returns undef on duplicate or spam
# mimics Import::add and wraps it for v2
sub add {
my ($self, $eml, $check_cb) = @_;
$self->{ibx}->with_umask(\&_add, $self, $eml, $check_cb);
}
sub idx_shard ($$) {
my ($self, $num) = @_;
$self->{idx_shards}->[$num % scalar(@{$self->{idx_shards}})];
}
# indexes a message, returns true if checkpointing is needed
sub do_idx ($$$$) {
my ($self, $msgref, $mime, $smsg) = @_;
$smsg->{bytes} = $smsg->{raw_bytes} + crlf_adjust($$msgref);
$self->{oidx}->add_overview($mime, $smsg);
my $idx = idx_shard($self, $smsg->{num});
$idx->index_raw($msgref, $mime, $smsg);
my $n = $self->{transact_bytes} += $smsg->{raw_bytes};
$n >= $self->{batch_bytes};
}
sub _add {
my ($self, $mime, $check_cb) = @_;
# spam check:
if ($check_cb) {
$mime = $check_cb->($mime, $self->{ibx}) or return;
}
# All pipes (> $^F) known to Perl 5.6+ have FD_CLOEXEC set,
# as does SQLite 3.4.1+ (released in 2007-07-20), and
# Xapian 1.3.2+ (released 2015-03-15).
# For the most part, we can spawn git-fast-import without
# leaking FDs to it...
$self->idx_init;
my ($num, $mid0) = v2_num_for($self, $mime);
defined $num or return; # duplicate
defined $mid0 or die "BUG: \$mid0 undefined\n";
my $im = $self->importer;
my $smsg = bless { mid => $mid0, num => $num }, 'PublicInbox::Smsg';
my $cmt = $im->add($mime, undef, $smsg); # sets $smsg->{ds|ts|blob}
$cmt = $im->get_mark($cmt);
$self->{last_commit}->[$self->{epoch_max}] = $cmt;
my $msgref = delete $smsg->{-raw_email};
if (do_idx($self, $msgref, $mime, $smsg)) {
$self->checkpoint;
}
$cmt;
}
sub v2_num_for {
my ($self, $mime) = @_;
my $mids = mids($mime);
if (@$mids) {
my $mid = $mids->[0];
my $num = $self->{mm}->mid_insert($mid);
if (defined $num) { # common case
return ($num, $mid);
}
# crap, Message-ID is already known, hope somebody just resent:
foreach my $m (@$mids) {
# read-only lookup now safe to do after above barrier
# easy, don't store duplicates
# note: do not add more diagnostic info here since
# it gets noisy on public-inbox-watch restarts
return () if content_exists($self, $mime, $m);
}
# AltId may pre-populate article numbers (e.g. X-Mail-Count
# or NNTP article number), use that article number if it's
# not in Over.
my $altid = $self->{ibx}->{altid};
if ($altid && grep(/:file=msgmap\.sqlite3\z/, @$altid)) {
my $num = $self->{mm}->num_for($mid);
if (defined $num && !$self->{oidx}->get_art($num)) {
return ($num, $mid);
}
}
# very unlikely:
warn "<$mid> reused for mismatched content\n";
# try the rest of the mids
for(my $i = $#$mids; $i >= 1; $i--) {
my $m = $mids->[$i];
$num = $self->{mm}->mid_insert($m);
if (defined $num) {
warn "alternative <$m> for <$mid> found\n";
return ($num, $m);
}
}
}
# none of the existing Message-IDs are good, generate a new one:
v2_num_for_harder($self, $mime);
}
sub v2_num_for_harder {
my ($self, $eml) = @_;
my $dig = content_digest($eml);
my $mid0 = PublicInbox::Import::digest2mid($dig, $eml);
my $num = $self->{mm}->mid_insert($mid0);
unless (defined $num) {
# it's hard to spoof the last Received: header
my @recvd = $eml->header_raw('Received');
$dig->add("Received: $_") foreach (@recvd);
$mid0 = PublicInbox::Import::digest2mid($dig, $eml);
$num = $self->{mm}->mid_insert($mid0);
# fall back to a random Message-ID and give up determinism:
until (defined($num)) {
$dig->add(rand);
$mid0 = PublicInbox::Import::digest2mid($dig, $eml);
warn "using random Message-ID <$mid0> as fallback\n";
$num = $self->{mm}->mid_insert($mid0);
}
}
PublicInbox::Import::append_mid($eml, $mid0);
($num, $mid0);
}
sub _idx_init { # with_umask callback
my ($self, $opt) = @_;
$self->lock_acquire unless $opt && $opt->{-skip_lock};
$self->{oidx}->create;
# xcpdb can change shard count while -watch is idle
my $nshards = count_shards($self);
$self->{shards} = $nshards if $nshards && $nshards != $self->{shards};
$self->{batch_bytes} = $opt->{batch_size} //
$PublicInbox::SearchIdx::BATCH_BYTES;
$self->{batch_bytes} *= $self->{shards} if $self->{parallel};
# need to create all shards before initializing msgmap FD
# idx_shards must be visible to all forked processes
my $max = $self->{shards} - 1;
my $idx = $self->{idx_shards} = [];
push @$idx, PublicInbox::SearchIdxShard->new($self, $_) for (0..$max);
my $ibx = $self->{ibx} or return; # ExtIdxSearch
# Now that all subprocesses are up, we can open the FDs
# for SQLite:
my $mm = $self->{mm} = PublicInbox::Msgmap->new_file(
"$ibx->{inboxdir}/msgmap.sqlite3",
$ibx->{-no_fsync} ? 2 : 1);
$mm->{dbh}->begin_work;
}
sub parallel_init ($$) {
my ($self, $indexlevel) = @_;
if (($indexlevel // 'full') eq 'basic') {
$self->{parallel} = 0;
} else {
pipe(my ($r, $w)) or die "pipe failed: $!";
# pipe for barrier notifications doesn't need to be big,
# 1031: F_SETPIPE_SZ
fcntl($w, 1031, 4096) if $^O eq 'linux';
$self->{bnote} = [ $r, $w ];
$w->autoflush(1);
}
}
# idempotent
sub idx_init {
my ($self, $opt) = @_;
return if $self->{idx_shards};
my $ibx = $self->{ibx};
# do not leak read-only FDs to child processes, we only have these
# FDs for duplicate detection so they should not be
# frequently activated.
delete @$ibx{qw(mm search)};
$ibx->git->cleanup;
parallel_init($self, $ibx->{indexlevel});
$ibx->umask_prepare;
$ibx->with_umask(\&_idx_init, $self, $opt);
}
# returns an array mapping [ epoch => latest_commit ]
# latest_commit may be undef if nothing was done to that epoch
# $replace_map = { $object_id => $strref, ... }
sub _replace_oids ($$$) {
my ($self, $mime, $replace_map) = @_;
$self->done;
my $ibx = $self->{ibx};
my $pfx = "$ibx->{inboxdir}/git";
my $rewrites = []; # epoch => commit
my $max = $self->{epoch_max};
unless (defined($max)) {
defined(my $latest = $ibx->git_dir_latest(\$max)) or return;
$self->{epoch_max} = $max;
}
foreach my $i (0..$max) {
my $git_dir = "$pfx/$i.git";
-d $git_dir or next;
my $git = PublicInbox::Git->new($git_dir);
my $im = $self->import_init($git, 0, 1);
$rewrites->[$i] = $im->replace_oids($mime, $replace_map);
$im->done;
}
$rewrites;
}
sub content_hashes ($) {
my ($mime) = @_;
my @chashes = ( content_hash($mime) );
# We still support Email::MIME, here, and
# Email::MIME->as_string doesn't always round-trip, so we may
# use a second content_hash
my $rt = content_hash(PublicInbox::Eml->new(\($mime->as_string)));
push @chashes, $rt if $chashes[0] ne $rt;
\@chashes;
}
sub content_matches ($$) {
my ($chashes, $existing) = @_;
my $chash = content_hash($existing);
foreach (@$chashes) {
return 1 if $_ eq $chash
}
0
}
# used for removing or replacing (purging)
sub rewrite_internal ($$;$$$) {
my ($self, $old_eml, $cmt_msg, $new_eml, $sref) = @_;
$self->idx_init;
my ($im, $need_reindex, $replace_map);
if ($sref) {
$replace_map = {}; # oid => sref
$need_reindex = [] if $new_eml;
} else {
$im = $self->importer;
}
my $oidx = $self->{oidx};
my $chashes = content_hashes($old_eml);
my $removed = [];
my $mids = mids($old_eml);
# We avoid introducing new blobs into git since the raw content
# can be slightly different, so we do not need the user-supplied
# message now that we have the mids and content_hash
$old_eml = undef;
my $mark;
foreach my $mid (@$mids) {
my %gone; # num => [ smsg, $mime, raw ]
my ($id, $prev);
while (my $smsg = $oidx->next_by_mid($mid, \$id, \$prev)) {
my $msg = get_blob($self, $smsg);
if (!defined($msg)) {
warn "broken smsg for $mid\n";
next; # continue
}
my $orig = $$msg;
my $cur = PublicInbox::Eml->new($msg);
if (content_matches($chashes, $cur)) {
$gone{$smsg->{num}} = [ $smsg, $cur, \$orig ];
}
}
my $n = scalar keys %gone;
next unless $n;
if ($n > 1) {
warn "BUG: multiple articles linked to <$mid>\n",
join(',', sort keys %gone), "\n";
}
foreach my $num (keys %gone) {
my ($smsg, $mime, $orig) = @{$gone{$num}};
# $removed should only be set once assuming
# no bugs in our deduplication code:
$removed = [ undef, $mime, $smsg ];
my $oid = $smsg->{blob};
if ($replace_map) {
$replace_map->{$oid} = $sref;
} else {
($mark, undef) = $im->remove($orig, $cmt_msg);
$removed->[0] = $mark;
}
$orig = undef;
if ($need_reindex) { # ->replace
push @$need_reindex, $smsg;
} else { # ->purge or ->remove
$self->{mm}->num_delete($num);
}
unindex_oid_aux($self, $oid, $mid);
}
}
if (defined $mark) {
my $cmt = $im->get_mark($mark);
$self->{last_commit}->[$self->{epoch_max}] = $cmt;
}
if ($replace_map && scalar keys %$replace_map) {
my $rewrites = _replace_oids($self, $new_eml, $replace_map);
return { rewrites => $rewrites, need_reindex => $need_reindex };
}
defined($mark) ? $removed : undef;
}
# public (see PublicInbox::Import->remove), but note the 3rd element
# (retval[2]) is not part of the stable API shared with Import->remove
sub remove {
my ($self, $eml, $cmt_msg) = @_;
my $r = $self->{ibx}->with_umask(\&rewrite_internal,
$self, $eml, $cmt_msg);
defined($r) && defined($r->[0]) ? @$r: undef;
}
sub _replace ($$;$$) {
my ($self, $old_eml, $new_eml, $sref) = @_;
my $arg = [ $self, $old_eml, undef, $new_eml, $sref ];
my $rewritten = $self->{ibx}->with_umask(\&rewrite_internal,
$self, $old_eml, undef, $new_eml, $sref) or return;
my $rewrites = $rewritten->{rewrites};
# ->done is called if there are rewrites since we gc+prune from git
$self->idx_init if @$rewrites;
for my $i (0..$#$rewrites) {
defined(my $cmt = $rewrites->[$i]) or next;
$self->{last_commit}->[$i] = $cmt;
}
$rewritten;
}
# public
sub purge {
my ($self, $mime) = @_;
my $rewritten = _replace($self, $mime, undef, \'') or return;
$rewritten->{rewrites}
}
# returns the git object_id of $fh, does not write the object to FS
sub git_hash_raw ($$) {
my ($self, $raw) = @_;
# grab the expected OID we have to reindex:
pipe(my($in, $w)) or die "pipe: $!";
my $git_dir = $self->git->{git_dir};
my $cmd = ['git', "--git-dir=$git_dir", qw(hash-object --stdin)];
my $r = popen_rd($cmd, undef, { 0 => $in });
print $w $$raw or die "print \$w: $!";
close $w or die "close \$w: $!";
local $/ = "\n";
chomp(my $oid = <$r>);
close $r or die "git hash-object failed: $?";
$oid =~ /\A$OID\z/ or die "OID not expected: $oid";
$oid;
}
sub _check_mids_match ($$$) {
my ($old_list, $new_list, $hdrs) = @_;
my %old_mids = map { $_ => 1 } @$old_list;
my %new_mids = map { $_ => 1 } @$new_list;
my @old = keys %old_mids;
my @new = keys %new_mids;
my $err = "$hdrs may not be changed when replacing\n";
die $err if scalar(@old) != scalar(@new);
delete @new_mids{@old};
delete @old_mids{@new};
die $err if (scalar(keys %old_mids) || scalar(keys %new_mids));
}
# Changing Message-IDs or References with ->replace isn't supported.
# The rules for dealing with messages with multiple or conflicting
# Message-IDs are pretty complex and rethreading hasn't been fully
# implemented, yet.
sub check_mids_match ($$) {
my ($old, $new) = @_;
_check_mids_match(mids($old), mids($new), 'Message-ID(s)');
_check_mids_match(references($old), references($new),
'References/In-Reply-To');
}
# public
sub replace ($$$) {
my ($self, $old_mime, $new_mime) = @_;
check_mids_match($old_mime, $new_mime);
# mutt will always add Content-Length:, Status:, Lines: when editing
PublicInbox::Import::drop_unwanted_headers($new_mime);
my $raw = $new_mime->as_string;
my $expect_oid = git_hash_raw($self, \$raw);
my $rewritten = _replace($self, $old_mime, $new_mime, \$raw) or return;
my $need_reindex = $rewritten->{need_reindex};
# just in case we have bugs in deduplication code:
my $n = scalar(@$need_reindex);
if ($n > 1) {
my $list = join(', ', map {
"$_->{num}: <$_->{mid}>"
} @$need_reindex);
warn <<"";
W: rewritten $n messages matching content of original message (expected: 1).
W: possible bug in public-inbox, NNTP article IDs and Message-IDs follow:
W: $list
}
# make sure we really got the OID:
my ($blob, $type, $bytes) = $self->git->check($expect_oid);
$blob eq $expect_oid or die "BUG: $expect_oid not found after replace";
# don't leak FDs to Xapian:
$self->git->cleanup;
# reindex modified messages:
for my $smsg (@$need_reindex) {
my $new_smsg = bless {
blob => $blob,
raw_bytes => $bytes,
num => $smsg->{num},
mid => $smsg->{mid},
}, 'PublicInbox::Smsg';
my $sync = { autime => $smsg->{ds}, cotime => $smsg->{ts} };
$new_smsg->populate($new_mime, $sync);
do_idx($self, \$raw, $new_mime, $new_smsg);
}
$rewritten->{rewrites};
}
sub last_epoch_commit ($$;$) {
my ($self, $i, $cmt) = @_;
my $v = PublicInbox::Search::SCHEMA_VERSION();
$self->{mm}->last_commit_xap($v, $i, $cmt);
}
sub set_last_commits ($) { # this is NOT for ExtSearchIdx
my ($self) = @_;
defined(my $epoch_max = $self->{epoch_max}) or return;
my $last_commit = $self->{last_commit};
foreach my $i (0..$epoch_max) {
defined(my $cmt = $last_commit->[$i]) or next;
$last_commit->[$i] = undef;
last_epoch_commit($self, $i, $cmt);
}
}
sub barrier_init {
my ($self, $n) = @_;
$self->{bnote} or return;
--$n;
my $barrier = { map { $_ => 1 } (0..$n) };
}
sub barrier_wait {
my ($self, $barrier) = @_;
my $bnote = $self->{bnote} or return;
my $r = $bnote->[0];
while (scalar keys %$barrier) {
defined(my $l = readline($r)) or die "EOF on barrier_wait: $!";
$l =~ /\Abarrier (\d+)/ or die "bad line on barrier_wait: $l";
delete $barrier->{$1} or die "bad shard[$1] on barrier wait";
}
}
# public
sub checkpoint ($;$) {
my ($self, $wait) = @_;
if (my $im = $self->{im}) {
if ($wait) {
$im->barrier;
} else {
$im->checkpoint;
}
}
my $shards = $self->{idx_shards};
if ($shards) {
my $mm = $self->{mm};
my $dbh = $mm->{dbh} if $mm;
# SQLite msgmap data is second in importance
$dbh->commit if $dbh;
# SQLite overview is third
$self->{oidx}->commit_lazy;
# Now deal with Xapian
if ($wait) {
my $barrier = barrier_init($self, scalar @$shards);
# each shard needs to issue a barrier command
$_->shard_barrier for @$shards;
# wait for each Xapian shard
barrier_wait($self, $barrier);
} else {
$_->shard_commit for @$shards;
}
my $midx = $self->{midx}; # misc index
$midx->commit_txn if $midx;
# last_commit is special, don't commit these until
# Xapian shards are done:
$dbh->begin_work if $dbh;
set_last_commits($self);
if ($dbh) {
$dbh->commit;
$dbh->begin_work;
}
$midx->begin_txn if $midx;
}
$self->{total_bytes} += $self->{transact_bytes};
$self->{transact_bytes} = 0;
}
# issue a write barrier to ensure all data is visible to other processes
# and read-only ops. Order of data importance is: git > SQLite > Xapian
# public
sub barrier { checkpoint($_[0], 1) };
# true if locked and active
sub active { !!$_[0]->{im} }
# public
sub done {
my ($self) = @_;
my $err = '';
if (my $im = delete $self->{im}) {
eval { $im->done }; # PublicInbox::Import::done
$err .= "import done: $@\n" if $@;
}
if (!$err) {
eval { checkpoint($self) };
$err .= "checkpoint: $@\n" if $@;
}
if (my $mm = delete $self->{mm}) {
my $m = $err ? 'rollback' : 'commit';
eval { $mm->{dbh}->$m };
$err .= "msgmap $m: $@\n" if $@;
}
my $shards = delete $self->{idx_shards};
if ($shards) {
for (@$shards) {
eval { $_->shard_close };
$err .= "shard close: $@\n" if $@;
}
}
eval { $self->{oidx}->dbh_close };
$err .= "over close: $@\n" if $@;
delete $self->{midx};
delete $self->{bnote};
my $nbytes = $self->{total_bytes};
$self->{total_bytes} = 0;
$self->lock_release(!!$nbytes) if $shards;
$self->git->cleanup;
die $err if $err;
}
sub write_alternates ($$$) {
my ($info_dir, $mode, $out) = @_;
my $fh = File::Temp->new(TEMPLATE => 'alt-XXXXXXXX', DIR => $info_dir);
my $tmp = $fh->filename;
print $fh @$out or die "print $tmp: $!\n";
chmod($mode, $fh) or die "fchmod $tmp: $!\n";
close $fh or die "close $tmp $!\n";
my $alt = "$info_dir/alternates";
rename($tmp, $alt) or die "rename $tmp => $alt: $!\n";
$fh->unlink_on_destroy(0);
}
sub fill_alternates ($$) {
my ($self, $epoch) = @_;
my $pfx = "$self->{ibx}->{inboxdir}/git";
my $all = "$self->{ibx}->{inboxdir}/all.git";
PublicInbox::Import::init_bare($all) unless -d $all;
my $info_dir = "$all/objects/info";
my $alt = "$info_dir/alternates";
my (%alt, $new);
my $mode = 0644;
if (-e $alt) {
open(my $fh, '<', $alt) or die "open < $alt: $!\n";
$mode = (stat($fh))[2] & 07777;
# we assign a sort score to every alternate and favor
# the newest (highest numbered) one because loose objects
# require scanning epochs and only the latest epoch is
# expected to see loose objects
my $score;
my $other = 0; # in case admin adds non-epoch repos
%alt = map {;
if (m!\A\Q../../\E([0-9]+)\.git/objects\z!) {
$score = $1 + 0;
} else {
$score = --$other;
}
$_ => $score;
} split(/\n+/, do { local $/; <$fh> });
}
foreach my $i (0..$epoch) {
my $dir = "../../git/$i.git/objects";
if (!exists($alt{$dir}) && -d "$pfx/$i.git") {
$alt{$dir} = $i;
$new = 1;
}
}
return unless $new;
write_alternates($info_dir, $mode,
[join("\n", sort { $alt{$b} <=> $alt{$a} } keys %alt), "\n"]);
}
sub git_init {
my ($self, $epoch) = @_;
my $git_dir = "$self->{ibx}->{inboxdir}/git/$epoch.git";
PublicInbox::Import::init_bare($git_dir);
my @cmd = (qw/git config/, "--file=$git_dir/config",
'include.path', '../../all.git/config');
PublicInbox::Import::run_die(\@cmd);
fill_alternates($self, $epoch);
$git_dir
}
sub importer {
my ($self) = @_;
my $im = $self->{im};
if ($im) {
if ($im->{bytes_added} < $self->{rotate_bytes}) {
return $im;
} else {
$self->{im} = undef;
$im->done;
$im = undef;
$self->checkpoint;
my $git_dir = $self->git_init(++$self->{epoch_max});
my $git = PublicInbox::Git->new($git_dir);
return $self->import_init($git, 0);
}
}
my $epoch = 0;
my $max;
my $latest = $self->{ibx}->git_dir_latest(\$max);
if (defined $latest) {
my $git = PublicInbox::Git->new($latest);
my $packed_bytes = $git->packed_bytes;
my $unpacked_bytes = $packed_bytes / $PACKING_FACTOR;
if ($unpacked_bytes >= $self->{rotate_bytes}) {
$epoch = $max + 1;
} else {
$self->{epoch_max} = $max;
return $self->import_init($git, $packed_bytes);
}
}
$self->{epoch_max} = $epoch;
$latest = $self->git_init($epoch);
$self->import_init(PublicInbox::Git->new($latest), 0);
}
sub import_init {
my ($self, $git, $packed_bytes, $tmp) = @_;
my $im = PublicInbox::Import->new($git, undef, undef, $self->{ibx});
$im->{bytes_added} = int($packed_bytes / $PACKING_FACTOR);
$im->{lock_path} = undef;
$im->{path_type} = 'v2';
$self->{im} = $im unless $tmp;
$im;
}
# XXX experimental
sub diff ($$$) {
my ($mid, $cur, $new) = @_;
my $ah = File::Temp->new(TEMPLATE => 'email-cur-XXXXXXXX', TMPDIR => 1);
print $ah $cur->as_string or die "print: $!";
$ah->flush or die "flush: $!";
PublicInbox::Import::drop_unwanted_headers($new);
my $bh = File::Temp->new(TEMPLATE => 'email-new-XXXXXXXX', TMPDIR => 1);
print $bh $new->as_string or die "print: $!";
$bh->flush or die "flush: $!";
my $cmd = [ qw(diff -u), $ah->filename, $bh->filename ];
print STDERR "# MID conflict <$mid>\n";
my $pid = spawn($cmd, undef, { 1 => 2 });
waitpid($pid, 0) == $pid or die "diff did not finish";
}
sub get_blob ($$) {
my ($self, $smsg) = @_;
if (my $im = $self->{im}) {
my $msg = $im->cat_blob($smsg->{blob});
return $msg if $msg;
}
# older message, should be in alternates
$self->{ibx}->msg_by_smsg($smsg);
}
sub content_exists ($$$) {
my ($self, $mime, $mid) = @_;
my $oidx = $self->{oidx};
my $chashes = content_hashes($mime);
my ($id, $prev);
while (my $smsg = $oidx->next_by_mid($mid, \$id, \$prev)) {
my $msg = get_blob($self, $smsg);
if (!defined($msg)) {
warn "broken smsg for $mid\n";
next;
}
my $cur = PublicInbox::Eml->new($msg);
return 1 if content_matches($chashes, $cur);
# XXX DEBUG_DIFF is experimental and may be removed
diff($mid, $cur, $mime) if $ENV{DEBUG_DIFF};
}
undef;
}
sub atfork_child {
my ($self) = @_;
if (my $shards = $self->{idx_shards}) {
$_->atfork_child foreach @$shards;
}
if (my $im = $self->{im}) {
$im->atfork_child;
}
die "unexpected mm" if $self->{mm};
close $self->{bnote}->[0] or die "close bnote[0]: $!\n";
$self->{bnote}->[1];
}
sub reindex_checkpoint ($$) {
my ($self, $sync) = @_;
$self->git->async_wait_all;
$self->update_last_commit($sync);
${$sync->{need_checkpoint}} = 0;
my $mm_tmp = $sync->{mm_tmp};
$mm_tmp->atfork_prepare if $mm_tmp;
die 'BUG: {im} during reindex' if $self->{im};
if ($self->{ibx_map}) {
checkpoint($self, 1); # no need to release lock on pure index
} else {
$self->done; # release lock
}
if (my $pr = $sync->{-opt}->{-progress}) {
$pr->(sprintf($sync->{-regen_fmt}, ${$sync->{nr}}));
}
# allow -watch or -mda to write...
$self->idx_init($sync->{-opt}); # reacquire lock
$mm_tmp->atfork_parent if $mm_tmp;
}
sub index_oid { # cat_async callback
my ($bref, $oid, $type, $size, $arg) = @_;
my $self = $arg->{self};
local $self->{current_info} = "$self->{current_info} $oid";
return if $size == 0; # purged
my ($num, $mid0);
my $eml = PublicInbox::Eml->new($$bref);
my $mids = mids($eml);
my $chash = content_hash($eml);
if (scalar(@$mids) == 0) {
warn "E: $oid has no Message-ID, skipping\n";
return;
}
# {unindexed} is unlikely
if ((my $unindexed = $arg->{unindexed}) && scalar(@$mids) == 1) {
$num = delete($unindexed->{$mids->[0]});
if (defined $num) {
$mid0 = $mids->[0];
$self->{mm}->mid_set($num, $mid0);
delete($arg->{unindexed}) if !keys(%$unindexed);
}
}
if (!defined($num)) { # reuse if reindexing (or duplicates)
my $oidx = $self->{oidx};
for my $mid (@$mids) {
($num, $mid0) = $oidx->num_mid0_for_oid($oid, $mid);
last if defined $num;
}
}
$mid0 //= do { # is this a number we got before?
$num = $arg->{mm_tmp}->num_for($mids->[0]);
defined($num) ? $mids->[0] : undef;
};
if (!defined($num)) {
for (my $i = $#$mids; $i >= 1; $i--) {
$num = $arg->{mm_tmp}->num_for($mids->[$i]);
if (defined($num)) {
$mid0 = $mids->[$i];
last;
}
}
}
if (defined($num)) {
$arg->{mm_tmp}->num_delete($num);
} else { # never seen
$num = $self->{mm}->mid_insert($mids->[0]);
if (defined($num)) {
$mid0 = $mids->[0];
} else { # rare, try the rest of them, backwards
for (my $i = $#$mids; $i >= 1; $i--) {
$num = $self->{mm}->mid_insert($mids->[$i]);
if (defined($num)) {
$mid0 = $mids->[$i];
last;
}
}
}
}
if (!defined($num)) {
warn "E: $oid <", join('> <', @$mids), "> is a duplicate\n";
return;
}
++${$arg->{nr}};
my $smsg = bless {
raw_bytes => $size,
num => $num,
blob => $oid,
mid => $mid0,
}, 'PublicInbox::Smsg';
$smsg->populate($eml, $arg);
if (do_idx($self, $bref, $eml, $smsg)) {
${$arg->{need_checkpoint}} = 1;
}
${$arg->{latest_cmt}} = $arg->{cur_cmt} // die 'BUG: {cur_cmt} missing';
}
# only update last_commit for $i on reindex iff newer than current
sub update_last_commit {
my ($self, $sync, $stk) = @_;
my $unit = $sync->{unit} // return;
my $latest_cmt = $stk ? $stk->{latest_cmt} : ${$sync->{latest_cmt}};
defined($latest_cmt) or return;
my $last = last_epoch_commit($self, $unit->{epoch});
if (defined $last && is_ancestor($self->git, $last, $latest_cmt)) {
my @cmd = (qw(rev-list --count), "$last..$latest_cmt");
chomp(my $n = $unit->{git}->qx(@cmd));
return if $n ne '' && $n == 0;
}
last_epoch_commit($self, $unit->{epoch}, $latest_cmt);
}
sub last_commits {
my ($self, $sync) = @_;
my $heads = [];
for (my $i = $sync->{epoch_max}; $i >= 0; $i--) {
$heads->[$i] = last_epoch_commit($self, $i);
}
$heads;
}
# returns a revision range for git-log(1)
sub log_range ($$$) {
my ($sync, $unit, $tip) = @_;
my $opt = $sync->{-opt};
my $pr = $opt->{-progress} if (($opt->{verbose} || 0) > 1);
my $i = $unit->{epoch};
my $cur = $sync->{ranges}->[$i] or do {
$pr->("$i.git indexing all of $tip\n") if $pr;
return $tip; # all of it
};
# fast equality check to avoid (v)fork+execve overhead
if ($cur eq $tip) {
$sync->{ranges}->[$i] = undef;
return;
}
my $range = "$cur..$tip";
$pr->("$i.git checking contiguity... ") if $pr;
my $git = $unit->{git};
if (is_ancestor($sync->{self}->git, $cur, $tip)) { # common case
$pr->("OK\n") if $pr;
my $n = $git->qx(qw(rev-list --count), $range);
chomp($n);
if ($n == 0) {
$sync->{ranges}->[$i] = undef;
$pr->("$i.git has nothing new\n") if $pr;
return; # nothing to do
}
$pr->("$i.git has $n changes since $cur\n") if $pr;
} else {
$pr->("FAIL\n") if $pr;
warn <<"";
discontiguous range: $range
Rewritten history? (in $git->{git_dir})
chomp(my $base = $git->qx('merge-base', $tip, $cur));
if ($base) {
$range = "$base..$tip";
warn "found merge-base: $base\n"
} else {
$range = $tip;
warn "discarding history at $cur\n";
}
warn <<"";
reindexing $git->{git_dir}
starting at $range
# $cur^0 may no longer exist if pruned by git
if ($git->qx(qw(rev-parse -q --verify), "$cur^0")) {
$unit->{unindex_range} = "$base..$cur";
} elsif ($base && $git->qx(qw(rev-parse -q --verify), $base)) {
$unit->{unindex_range} = "$base..";
} else {
warn "W: unable to unindex before $range\n";
}
}
$range;
}
# overridden by ExtSearchIdx
sub artnum_max { $_[0]->{mm}->num_highwater }
sub sync_prepare ($$) {
my ($self, $sync) = @_;
$sync->{ranges} = sync_ranges($self, $sync);
my $pr = $sync->{-opt}->{-progress};
my $regen_max = 0;
my $head = $sync->{ibx}->{ref_head} || 'HEAD';
my $pfx;
if ($pr) {
($pfx) = ($sync->{ibx}->{inboxdir} =~ m!([^/]+)\z!g);
$pfx //= $sync->{ibx}->{inboxdir};
}
# reindex stops at the current heads and we later rerun index_sync
# without {reindex}
my $reindex_heads = $self->last_commits($sync) if $sync->{reindex};
if ($sync->{max_size} = $sync->{-opt}->{max_size}) {
$sync->{index_oid} = $self->can('index_oid');
}
for (my $i = $sync->{epoch_max}; $i >= 0; $i--) {
my $git_dir = $sync->{ibx}->git_dir_n($i);
-d $git_dir or next; # missing epochs are fine
my $git = PublicInbox::Git->new($git_dir);
my $unit = { git => $git, epoch => $i };
if ($reindex_heads) {
$head = $reindex_heads->[$i] or next;
}
chomp(my $tip = $git->qx(qw(rev-parse -q --verify), $head));
next if $?; # new repo
my $range = log_range($sync, $unit, $tip) or next;
# can't use 'rev-list --count' if we use --diff-filter
$pr->("$pfx $i.git counting $range ... ") if $pr;
# Don't bump num_highwater on --reindex by using {D}.
# We intentionally do NOT use {D} in the non-reindex case
# because we want NNTP article number gaps from unindexed
# messages to show up in mirrors, too.
$sync->{D} //= $sync->{reindex} ? {} : undef; # OID_BIN => NR
my $stk = log2stack($sync, $git, $range);
return 0 if $sync->{quit};
my $nr = $stk ? $stk->num_records : 0;
$pr->("$nr\n") if $pr;
$unit->{stack} = $stk; # may be undef
unshift @{$sync->{todo}}, $unit;
$regen_max += $nr;
}
return 0 if $sync->{quit};
# XXX this should not happen unless somebody bypasses checks in
# our code and blindly injects "d" file history into git repos
if (my @leftovers = keys %{delete($sync->{D}) // {}}) {
warn('W: unindexing '.scalar(@leftovers)." leftovers\n");
local $self->{current_info} = 'leftover ';
my $unindex_oid = $self->can('unindex_oid');
for my $oid (@leftovers) {
$oid = unpack('H*', $oid);
my $req = { %$sync, oid => $oid };
$self->git->cat_async($oid, $unindex_oid, $req);
last if $sync->{quit};
}
$self->git->cat_async_wait;
}
return 0 if $sync->{quit};
if (!$regen_max) {
$sync->{-regen_fmt} = "%u/?\n";
return 0;
}
# reindex should NOT see new commits anymore, if we do,
# it's a problem and we need to notice it via die()
my $pad = length($regen_max) + 1;
$sync->{-regen_fmt} = "% ${pad}u/$regen_max\n";
$sync->{nr} = \(my $nr = 0);
return -1 if $sync->{reindex};
$regen_max + $self->artnum_max || 0;
}
sub unindex_oid_aux ($$$) {
my ($self, $oid, $mid) = @_;
my @removed = $self->{oidx}->remove_oid($oid, $mid);
for my $num (@removed) {
my $idx = idx_shard($self, $num);
$idx->shard_remove($oid, $num);
}
}
sub unindex_oid ($$;$) { # git->cat_async callback
my ($bref, $oid, $type, $size, $sync) = @_;
my $self = $sync->{self};
local $self->{current_info} = "$self->{current_info} $oid";
my $unindexed = $sync->{in_unindex} ? $sync->{unindexed} : undef;
my $mm = $self->{mm};
my $mids = mids(PublicInbox::Eml->new($bref));
undef $$bref;
my $oidx = $self->{oidx};
foreach my $mid (@$mids) {
my %gone;
my ($id, $prev);
while (my $smsg = $oidx->next_by_mid($mid, \$id, \$prev)) {
$gone{$smsg->{num}} = 1 if $oid eq $smsg->{blob};
}
my $n = scalar(keys(%gone)) or next;
if ($n > 1) {
warn "BUG: multiple articles linked to $oid\n",
join(',',sort keys %gone), "\n";
}
foreach my $num (keys %gone) {
if ($unindexed) {
my $mid0 = $mm->mid_for($num);
$unindexed->{$mid0} = $num;
}
$mm->num_delete($num);
}
unindex_oid_aux($self, $oid, $mid);
}
}
sub git { $_[0]->{ibx}->git }
# this is rare, it only happens when we get discontiguous history in
# a mirror because the source used -purge or -edit
sub unindex_todo ($$$) {
my ($self, $sync, $unit) = @_;
my $unindex_range = delete($unit->{unindex_range}) // return;
my $unindexed = $sync->{unindexed} //= {}; # $mid0 => $num
my $before = scalar keys %$unindexed;
# order does not matter, here:
my $fh = $unit->{git}->popen(qw(log --raw -r --no-notes --no-color
--no-abbrev --no-renames), $unindex_range);
local $sync->{in_unindex} = 1;
my $unindex_oid = $self->can('unindex_oid');
while (<$fh>) {
/\A:\d{6} 100644 $OID ($OID) [AM]\tm$/o or next;
$self->git->cat_async($1, $unindex_oid, { %$sync, oid => $1 });
}
close $fh or die "git log failed: \$?=$?";
$self->git->cat_async_wait;
return unless $sync->{-opt}->{prune};
my $after = scalar keys %$unindexed;
return if $before == $after;
# ensure any blob can not longer be accessed via dumb HTTP
PublicInbox::Import::run_die(['git',
"--git-dir=$unit->{git}->{git_dir}",
qw(-c gc.reflogExpire=now gc --prune=all --quiet)]);
}
sub sync_ranges ($$) {
my ($self, $sync) = @_;
my $reindex = $sync->{reindex};
return $self->last_commits($sync) unless $reindex;
return [] if ref($reindex) ne 'HASH';
my $ranges = $reindex->{from}; # arrayref;
if (ref($ranges) ne 'ARRAY') {
die 'BUG: $reindex->{from} not an ARRAY';
}
$ranges;
}
sub index_xap_only { # git->cat_async callback
my ($bref, $oid, $type, $size, $smsg) = @_;
my $self = $smsg->{self};
my $idx = idx_shard($self, $smsg->{num});
$smsg->{raw_bytes} = $size;
$idx->index_raw($bref, undef, $smsg);
$self->{transact_bytes} += $size;
}
sub index_xap_step ($$$;$) {
my ($self, $sync, $beg, $step) = @_;
my $end = $sync->{art_end};
return if $beg > $end; # nothing to do
$step //= $self->{shards};
my $ibx = $self->{ibx};
if (my $pr = $sync->{-opt}->{-progress}) {
$pr->("Xapian indexlevel=$ibx->{indexlevel} ".
"$beg..$end (% $step)\n");
}
for (my $num = $beg; $num <= $end; $num += $step) {
my $smsg = $ibx->over->get_art($num) or next;
$smsg->{self} = $self;
$ibx->git->cat_async($smsg->{blob}, \&index_xap_only, $smsg);
if ($self->{transact_bytes} >= $self->{batch_bytes}) {
${$sync->{nr}} = $num;
reindex_checkpoint($self, $sync);
}
}
}
sub index_todo ($$$) {
my ($self, $sync, $unit) = @_;
return if $sync->{quit};
unindex_todo($self, $sync, $unit);
my $stk = delete($unit->{stack}) or return;
my $all = $self->git;
my $index_oid = $self->can('index_oid');
my $unindex_oid = $self->can('unindex_oid');
my $pfx;
if ($unit->{git}->{git_dir} =~ m!/([^/]+)/git/([0-9]+\.git)\z!) {
$pfx = "$1 $2"; # v2
} else { # v1
($pfx) = ($unit->{git}->{git_dir} =~ m!/([^/]+)\z!g);
$pfx //= $unit->{git}->{git_dir};
}
local $self->{current_info} = "$pfx ";
local $sync->{latest_cmt} = \(my $latest_cmt);
local $sync->{unit} = $unit;
while (my ($f, $at, $ct, $oid, $cmt) = $stk->pop_rec) {
my $req = {
%$sync,
autime => $at,
cotime => $ct,
oid => $oid,
cur_cmt => $cmt
};
if ($f eq 'm') {
if ($sync->{max_size}) {
$all->check_async($oid, \&check_size, $req);
} else {
$all->cat_async($oid, $index_oid, $req);
}
} elsif ($f eq 'd') {
$all->cat_async($oid, $unindex_oid, $req);
}
if ($sync->{quit}) {
warn "waiting to quit...\n";
$all->async_wait_all;
$self->update_last_commit($sync);
return;
}
if (${$sync->{need_checkpoint}}) {
reindex_checkpoint($self, $sync);
}
}
$all->async_wait_all;
$self->update_last_commit($sync, $stk);
}
sub xapian_only {
my ($self, $opt, $sync, $art_beg) = @_;
my $seq = $opt->{sequential_shard};
$art_beg //= 0;
local $self->{parallel} = 0 if $seq;
$self->idx_init($opt); # acquire lock
if (my $art_end = $self->{ibx}->mm->max) {
$sync //= {
need_checkpoint => \(my $bool = 0),
-opt => $opt,
self => $self,
nr => \(my $nr = 0),
-regen_fmt => "%u/?\n",
};
$sync->{art_end} = $art_end;
if ($seq || !$self->{parallel}) {
my $shard_end = $self->{shards} - 1;
for my $i (0..$shard_end) {
index_xap_step($self, $sync, $art_beg + $i);
if ($i != $shard_end) {
reindex_checkpoint($self, $sync);
}
}
} else { # parallel (maybe)
index_xap_step($self, $sync, $art_beg, 1);
}
}
$self->git->cat_async_wait;
$self->done;
}
# public, called by public-inbox-index
sub index_sync {
my ($self, $opt) = @_;
$opt //= {};
return xapian_only($self, $opt) if $opt->{xapian_only};
my $pr = $opt->{-progress};
my $epoch_max;
my $latest = $self->{ibx}->git_dir_latest(\$epoch_max);
return unless defined $latest;
my $seq = $opt->{sequential_shard};
my $art_beg; # the NNTP article number we start xapian_only at
my $idxlevel = $self->{ibx}->{indexlevel};
local $self->{ibx}->{indexlevel} = 'basic' if $seq;
$self->idx_init($opt); # acquire lock
fill_alternates($self, $epoch_max);
$self->{oidx}->rethread_prepare($opt);
my $sync = {
need_checkpoint => \(my $bool = 0),
reindex => $opt->{reindex},
-opt => $opt,
self => $self,
ibx => $self->{ibx},
epoch_max => $epoch_max,
};
my $quit = sub { $sync->{quit} = 1 };
local $SIG{QUIT} = $quit;
local $SIG{INT} = $quit;
local $SIG{TERM} = $quit;
if (sync_prepare($self, $sync)) {
# tmp_clone seems to fail if inside a transaction, so
# we rollback here (because we opened {mm} for reading)
# Note: we do NOT rely on DBI transactions for atomicity;
# only for batch performance.
$self->{mm}->{dbh}->rollback;
$self->{mm}->{dbh}->begin_work;
$sync->{mm_tmp} =
$self->{mm}->tmp_clone($self->{ibx}->{inboxdir});
# xapian_only works incrementally w/o --reindex
if ($seq && !$opt->{reindex}) {
$art_beg = $sync->{mm_tmp}->max;
$art_beg++ if defined($art_beg);
}
}
# work forwards through history
index_todo($self, $sync, $_) for @{delete($sync->{todo}) // []};
$self->{oidx}->rethread_done($opt) unless $sync->{quit};
$self->done;
if (my $nr = $sync->{nr}) {
my $pr = $sync->{-opt}->{-progress};
$pr->('all.git '.sprintf($sync->{-regen_fmt}, $$nr)) if $pr;
}
# deal with Xapian shards sequentially
if ($seq && delete($sync->{mm_tmp})) {
$self->{ibx}->{indexlevel} = $idxlevel;
xapian_only($self, $opt, $sync, $art_beg);
}
# --reindex on the command-line
if ($opt->{reindex} && !ref($opt->{reindex}) && $idxlevel ne 'basic') {
$self->lock_acquire;
my $s0 = PublicInbox::SearchIdx->new($self->{ibx}, 0, 0);
if (my $xdb = $s0->idx_acquire) {
my $n = $xdb->get_metadata('has_threadid');
$xdb->set_metadata('has_threadid', '1') if $n ne '1';
}
$s0->idx_release;
$self->lock_release;
}
# reindex does not pick up new changes, so we rerun w/o it:
if ($opt->{reindex}) {
my %again = %$opt;
$sync = undef;
delete @again{qw(rethread reindex -skip_lock)};
index_sync($self, \%again);
}
}
1;