# Copyright (C) 2015-2020 all contributors
# License: AGPL-3.0+
# based on notmuch, but with no concept of folders, files or flags
#
# Indexes mail with Xapian and our (SQLite-based) ::Msgmap for use
# with the web and NNTP interfaces. This index maintains thread
# relationships for use by PublicInbox::SearchThread.
# This writes to the search index.
package PublicInbox::SearchIdx;
use strict;
use v5.10.1;
use parent qw(PublicInbox::Search PublicInbox::Lock Exporter);
use PublicInbox::Eml;
use PublicInbox::InboxWritable;
use PublicInbox::MID qw(mids_for_index mids);
use PublicInbox::MsgIter;
use PublicInbox::IdxStack;
use Carp qw(croak);
use POSIX qw(strftime);
use PublicInbox::OverIdx;
use PublicInbox::Spawn qw(spawn nodatacow_dir);
use PublicInbox::Git qw(git_unquote);
use PublicInbox::MsgTime qw(msg_timestamp msg_datestamp);
our @EXPORT_OK = qw(crlf_adjust log2stack is_ancestor check_size);
my $X = \%PublicInbox::Search::X;
my ($DB_CREATE_OR_OPEN, $DB_OPEN);
our $DB_NO_SYNC = 0;
our $BATCH_BYTES = $ENV{XAPIAN_FLUSH_THRESHOLD} ? 0x7fffffff : 1_000_000;
use constant DEBUG => !!$ENV{DEBUG};
my $xapianlevels = qr/\A(?:full|medium)\z/;
my $hex = '[a-f0-9]';
my $OID = $hex .'{40,}';
sub new {
my ($class, $ibx, $creat, $shard) = @_;
ref $ibx or die "BUG: expected PublicInbox::Inbox object: $ibx";
my $levels = qr/\A(?:full|medium|basic)\z/;
my $inboxdir = $ibx->{inboxdir};
my $version = $ibx->version;
my $indexlevel = 'full';
my $altid = $ibx->{altid};
if ($altid) {
require PublicInbox::AltId;
$altid = [ map { PublicInbox::AltId->new($ibx, $_); } @$altid ];
}
if ($ibx->{indexlevel}) {
if ($ibx->{indexlevel} =~ $levels) {
$indexlevel = $ibx->{indexlevel};
} else {
die("Invalid indexlevel $ibx->{indexlevel}\n");
}
}
$ibx = PublicInbox::InboxWritable->new($ibx);
my $self = bless {
ibx => $ibx,
xpfx => $inboxdir, # for xpfx_init
-altid => $altid,
ibx_ver => $version,
indexlevel => $indexlevel,
}, $class;
$self->xpfx_init;
$self->{-set_indexlevel_once} = 1 if $indexlevel eq 'medium';
if ($ibx->{-skip_docdata}) {
$self->{-set_skip_docdata_once} = 1;
$self->{-skip_docdata} = 1;
}
$ibx->umask_prepare;
if ($version == 1) {
$self->{lock_path} = "$inboxdir/ssoma.lock";
my $dir = $self->xdir;
$self->{over} = PublicInbox::OverIdx->new("$dir/over.sqlite3");
$self->{over}->{-no_fsync} = 1 if $ibx->{-no_fsync};
} elsif ($version == 2) {
defined $shard or die "shard is required for v2\n";
# shard is a number
$self->{shard} = $shard;
$self->{lock_path} = undef;
} else {
die "unsupported inbox version=$version\n";
}
$self->{creat} = ($creat || 0) == 1;
$self;
}
sub need_xapian ($) { $_[0]->{indexlevel} =~ $xapianlevels }
sub idx_release {
my ($self, $wake) = @_;
if (need_xapian($self)) {
my $xdb = delete $self->{xdb} or croak 'not acquired';
$xdb->close;
}
$self->lock_release($wake) if $self->{creat};
undef;
}
sub load_xapian_writable () {
return 1 if $X->{WritableDatabase};
PublicInbox::Search::load_xapian() or return;
my $xap = $PublicInbox::Search::Xap;
for (qw(Document TermGenerator WritableDatabase)) {
$X->{$_} = $xap.'::'.$_;
}
eval 'require '.$X->{WritableDatabase} or die;
*sortable_serialise = $xap.'::sortable_serialise';
$DB_CREATE_OR_OPEN = eval($xap.'::DB_CREATE_OR_OPEN()');
$DB_OPEN = eval($xap.'::DB_OPEN()');
my $ver = (eval($xap.'::major_version()') << 16) |
(eval($xap.'::minor_version()') << 8);
$DB_NO_SYNC = 0x4 if $ver >= 0x10400;
1;
}
sub idx_acquire {
my ($self) = @_;
my $flag;
my $dir = $self->xdir;
if (need_xapian($self)) {
croak 'already acquired' if $self->{xdb};
load_xapian_writable();
$flag = $self->{creat} ? $DB_CREATE_OR_OPEN : $DB_OPEN;
}
if ($self->{creat}) {
require File::Path;
$self->lock_acquire;
# don't create empty Xapian directories if we don't need Xapian
my $is_shard = defined($self->{shard});
if (!-d $dir && (!$is_shard ||
($is_shard && need_xapian($self)))) {
File::Path::mkpath($dir);
nodatacow_dir($dir);
$self->{-set_has_threadid_once} = 1;
}
}
return unless defined $flag;
$flag |= $DB_NO_SYNC if $self->{ibx}->{-no_fsync};
my $xdb = eval { ($X->{WritableDatabase})->new($dir, $flag) };
croak "Failed opening $dir: $@" if $@;
$self->{xdb} = $xdb;
}
sub add_val ($$$) {
my ($doc, $col, $num) = @_;
$num = sortable_serialise($num);
$doc->add_value($col, $num);
}
sub term_generator ($) { # write-only
my ($self) = @_;
$self->{term_generator} //= do {
my $tg = $X->{TermGenerator}->new;
$tg->set_stemmer($self->stemmer);
$tg;
}
}
sub index_text ($$$$) {
my ($self, $text, $wdf_inc, $prefix) = @_;
my $tg = term_generator($self); # man Search::Xapian::TermGenerator
if ($self->{indexlevel} eq 'full') {
$tg->index_text($text, $wdf_inc, $prefix);
$tg->increase_termpos;
} else {
$tg->index_text_without_positions($text, $wdf_inc, $prefix);
}
}
sub index_headers ($$) {
my ($self, $smsg) = @_;
my @x = (from => 'A', # Author
subject => 'S', to => 'XTO', cc => 'XCC');
while (my ($field, $pfx) = splice(@x, 0, 2)) {
my $val = $smsg->{$field};
index_text($self, $val, 1, $pfx) if $val ne '';
}
}
sub index_diff_inc ($$$$) {
my ($self, $text, $pfx, $xnq) = @_;
if (@$xnq) {
index_text($self, join("\n", @$xnq), 1, 'XNQ');
@$xnq = ();
}
index_text($self, $text, 1, $pfx);
}
sub index_old_diff_fn {
my ($self, $seen, $fa, $fb, $xnq) = @_;
# no renames or space support for traditional diffs,
# find the number of leading common paths to strip:
my @fa = split('/', $fa);
my @fb = split('/', $fb);
while (scalar(@fa) && scalar(@fb)) {
$fa = join('/', @fa);
$fb = join('/', @fb);
if ($fa eq $fb) {
unless ($seen->{$fa}++) {
index_diff_inc($self, $fa, 'XDFN', $xnq);
}
return 1;
}
shift @fa;
shift @fb;
}
0;
}
sub index_diff ($$$) {
my ($self, $txt, $doc) = @_;
my %seen;
my $in_diff;
my @xnq;
my $xnq = \@xnq;
foreach (split(/\n/, $txt)) {
if ($in_diff && s/^ //) { # diff context
index_diff_inc($self, $_, 'XDFCTX', $xnq);
} elsif (/^-- $/) { # email signature begins
$in_diff = undef;
} elsif (m!^diff --git "?[^/]+/.+ "?[^/]+/.+\z!) {
# wait until "---" and "+++" to capture filenames
$in_diff = 1;
# traditional diff:
} elsif (m/^diff -(.+) (\S+) (\S+)$/) {
my ($opt, $fa, $fb) = ($1, $2, $3);
push @xnq, $_;
# only support unified:
next unless $opt =~ /[uU]/;
$in_diff = index_old_diff_fn($self, \%seen, $fa, $fb,
$xnq);
} elsif (m!^--- ("?[^/]+/.+)!) {
my $fn = $1;
$fn = (split('/', git_unquote($fn), 2))[1];
$seen{$fn}++ or index_diff_inc($self, $fn, 'XDFN', $xnq);
$in_diff = 1;
} elsif (m!^\+\+\+ ("?[^/]+/.+)!) {
my $fn = $1;
$fn = (split('/', git_unquote($fn), 2))[1];
$seen{$fn}++ or index_diff_inc($self, $fn, 'XDFN', $xnq);
$in_diff = 1;
} elsif (/^--- (\S+)/) {
$in_diff = $1;
push @xnq, $_;
} elsif (defined $in_diff && /^\+\+\+ (\S+)/) {
$in_diff = index_old_diff_fn($self, \%seen, $in_diff,
$1, $xnq);
} elsif ($in_diff && s/^\+//) { # diff added
index_diff_inc($self, $_, 'XDFB', $xnq);
} elsif ($in_diff && s/^-//) { # diff removed
index_diff_inc($self, $_, 'XDFA', $xnq);
} elsif (m!^index ([a-f0-9]+)\.\.([a-f0-9]+)!) {
my ($ba, $bb) = ($1, $2);
index_git_blob_id($doc, 'XDFPRE', $ba);
index_git_blob_id($doc, 'XDFPOST', $bb);
$in_diff = 1;
} elsif (/^@@ (?:\S+) (?:\S+) @@\s*$/) {
# traditional diff w/o -p
} elsif (/^@@ (?:\S+) (?:\S+) @@\s*(\S+.*)$/) {
# hunk header context
index_diff_inc($self, $1, 'XDFHH', $xnq);
# ignore the following lines:
} elsif (/^(?:dis)similarity index/ ||
/^(?:old|new) mode/ ||
/^(?:deleted|new) file mode/ ||
/^(?:copy|rename) (?:from|to) / ||
/^(?:dis)?similarity index / ||
/^\\ No newline at end of file/ ||
/^Binary files .* differ/) {
push @xnq, $_;
} elsif ($_ eq '') {
# possible to be in diff context, some mail may be
# stripped by MUA or even GNU diff(1). "git apply"
# treats a bare "\n" as diff context, too
} else {
push @xnq, $_;
warn "non-diff line: $_\n" if DEBUG && $_ ne '';
$in_diff = undef;
}
}
index_text($self, join("\n", @xnq), 1, 'XNQ');
}
sub index_xapian { # msg_iter callback
my $part = $_[0]->[0]; # ignore $depth and $idx
my ($self, $doc) = @{$_[1]};
my $ct = $part->content_type || 'text/plain';
my $fn = $part->filename;
if (defined $fn && $fn ne '') {
index_text($self, $fn, 1, 'XFN');
}
if ($part->{is_submsg}) {
my $mids = mids_for_index($part);
index_ids($self, $doc, $part, $mids);
my $smsg = bless {}, 'PublicInbox::Smsg';
$smsg->populate($part);
index_headers($self, $smsg);
}
my ($s, undef) = msg_part_text($part, $ct);
defined $s or return;
$_[0]->[0] = $part = undef; # free memory
# split off quoted and unquoted blocks:
my @sections = PublicInbox::MsgIter::split_quotes($s);
undef $s; # free memory
for my $txt (@sections) {
if ($txt =~ /\A>/) {
index_text($self, $txt, 0, 'XQUOT');
} else {
# does it look like a diff?
if ($txt =~ /^(?:diff|---|\+\+\+) /ms) {
index_diff($self, $txt, $doc);
} else {
index_text($self, $txt, 1, 'XNQ');
}
}
undef $txt; # free memory
}
}
sub index_ids ($$$$) {
my ($self, $doc, $hdr, $mids) = @_;
for my $mid (@$mids) {
index_text($self, $mid, 1, 'XM');
# because too many Message-IDs are prefixed with
# "Pine.LNX."...
if ($mid =~ /\w{12,}/) {
my @long = ($mid =~ /(\w{3,}+)/g);
index_text($self, join(' ', @long), 1, 'XM');
}
}
$doc->add_boolean_term('Q' . $_) for @$mids;
for my $l ($hdr->header_raw('List-Id')) {
$l =~ /<([^>]+)>/ or next;
my $lid = $1;
$doc->add_boolean_term('G' . $lid);
index_text($self, $lid, 1, 'XL'); # probabilistic
}
}
sub add_xapian ($$$$) {
my ($self, $eml, $smsg, $mids) = @_;
my $doc = $X->{Document}->new;
add_val($doc, PublicInbox::Search::TS(), $smsg->{ts});
my @ds = gmtime($smsg->{ds});
my $yyyymmdd = strftime('%Y%m%d', @ds);
add_val($doc, PublicInbox::Search::YYYYMMDD(), $yyyymmdd);
my $dt = strftime('%Y%m%d%H%M%S', @ds);
add_val($doc, PublicInbox::Search::DT(), $dt);
add_val($doc, PublicInbox::Search::BYTES(), $smsg->{bytes});
add_val($doc, PublicInbox::Search::UID(), $smsg->{num});
add_val($doc, PublicInbox::Search::THREADID, $smsg->{tid});
my $tg = term_generator($self);
$tg->set_document($doc);
index_headers($self, $smsg);
msg_iter($eml, \&index_xapian, [ $self, $doc ]);
index_ids($self, $doc, $eml, $mids);
# by default, we maintain compatibility with v1.5.0 and earlier
# by writing to docdata.glass, users who never exect to downgrade can
# use --skip-docdata
if (!$self->{-skip_docdata}) {
# WWW doesn't need {to} or {cc}, only NNTP
$smsg->{to} = $smsg->{cc} = '';
PublicInbox::OverIdx::parse_references($smsg, $eml, $mids);
my $data = $smsg->to_doc_data;
$doc->set_data($data);
}
if (my $altid = $self->{-altid}) {
foreach my $alt (@$altid) {
my $pfx = $alt->{xprefix};
foreach my $mid (@$mids) {
my $id = $alt->mid2alt($mid);
next unless defined $id;
$doc->add_boolean_term($pfx . $id);
}
}
}
$self->{xdb}->replace_document($smsg->{num}, $doc);
}
sub _msgmap_init ($) {
my ($self) = @_;
die "BUG: _msgmap_init is only for v1\n" if $self->{ibx_ver} != 1;
$self->{mm} //= eval {
require PublicInbox::Msgmap;
my $rw = $self->{ibx}->{-no_fsync} ? 2 : 1;
PublicInbox::Msgmap->new($self->{ibx}->{inboxdir}, $rw);
};
}
sub add_message {
# mime = PublicInbox::Eml or Email::MIME object
my ($self, $mime, $smsg, $sync) = @_;
my $mids = mids_for_index($mime);
$smsg //= bless { blob => '' }, 'PublicInbox::Smsg'; # test-only compat
$smsg->{mid} //= $mids->[0]; # v1 compatibility
$smsg->{num} //= do { # v1
_msgmap_init($self);
index_mm($self, $mime, $smsg->{blob}, $sync);
};
# v1 and tests only:
$smsg->populate($mime, $sync);
$smsg->{bytes} //= length($mime->as_string);
eval {
# order matters, overview stores every possible piece of
# data in doc_data (deflated). Xapian only stores a subset
# of the fields which exist in over.sqlite3. We may stop
# storing doc_data in Xapian sometime after we get multi-inbox
# search working.
if (my $over = $self->{over}) { # v1 only
$over->add_overview($mime, $smsg);
}
if (need_xapian($self)) {
add_xapian($self, $mime, $smsg, $mids);
}
};
if ($@) {
warn "failed to index message <".join('> <',@$mids).">: $@\n";
return undef;
}
$smsg->{num};
}
sub xdb_remove {
my ($self, $oid, @removed) = @_;
my $xdb = $self->{xdb} or return;
for my $num (@removed) {
my $doc = eval { $xdb->get_document($num) };
unless ($doc) {
warn "E: $@\n" if $@;
warn "E: #$num $oid missing in Xapian\n";
next;
}
my $smsg = bless {}, 'PublicInbox::Smsg';
$smsg->load_expand($doc);
my $blob = $smsg->{blob} // '(unset)';
if ($blob eq $oid) {
$xdb->delete_document($num);
} else {
warn "E: #$num $oid != $blob in Xapian\n";
}
}
}
sub remove_by_oid {
my ($self, $oid, $num) = @_;
die "BUG: remove_by_oid is v2-only\n" if $self->{over};
$self->begin_txn_lazy;
xdb_remove($self, $oid, $num) if need_xapian($self);
}
sub index_git_blob_id {
my ($doc, $pfx, $objid) = @_;
my $len = length($objid);
for (my $len = length($objid); $len >= 7; ) {
$doc->add_term($pfx.$objid);
$objid = substr($objid, 0, --$len);
}
}
# v1 only
sub unindex_eml {
my ($self, $oid, $eml) = @_;
my $mids = mids($eml);
my $nr = 0;
my %tmp;
for my $mid (@$mids) {
my @removed = eval { $self->{over}->remove_oid($oid, $mid) };
if ($@) {
warn "E: failed to remove <$mid> from overview: $@\n";
} else {
$nr += scalar @removed;
$tmp{$_}++ for @removed;
}
}
if (!$nr) {
$mids = join('> <', @$mids);
warn "W: <$mids> missing for removal from overview\n";
}
while (my ($num, $nr) = each %tmp) {
warn "BUG: $num appears >1 times ($nr) for $oid\n" if $nr != 1;
}
if ($nr) {
$self->{mm}->num_delete($_) for (keys %tmp);
} else { # just in case msgmap and over.sqlite3 become desynched:
$self->{mm}->mid_delete($mids->[0]);
}
xdb_remove($self, $oid, keys %tmp) if need_xapian($self);
}
sub index_mm {
my ($self, $mime, $oid, $sync) = @_;
my $mids = mids($mime);
my $mm = $self->{mm};
if ($sync->{reindex}) {
my $over = $self->{over};
for my $mid (@$mids) {
my ($num, undef) = $over->num_mid0_for_oid($oid, $mid);
return $num if defined $num;
}
$mm->num_for($mids->[0]) // $mm->mid_insert($mids->[0]);
} else {
# fallback to num_for since filters like RubyLang set the number
$mm->mid_insert($mids->[0]) // $mm->num_for($mids->[0]);
}
}
# returns the number of bytes to add if given a non-CRLF arg
sub crlf_adjust ($) {
if (index($_[0], "\r\n") < 0) {
# common case is LF-only, every \n needs an \r;
# so favor a cheap tr// over an expensive m//g
$_[0] =~ tr/\n/\n/;
} else { # count number of '\n' w/o '\r', expensive:
scalar(my @n = ($_[0] =~ m/(?cat_async callback
my ($bref, $oid, $type, $size, $sync) = @_;
my ($nr, $max) = @$sync{qw(nr max)};
++$$nr;
$$max -= $size;
$size += crlf_adjust($$bref);
my $smsg = bless { bytes => $size, blob => $oid }, 'PublicInbox::Smsg';
my $self = $sync->{sidx};
my $eml = PublicInbox::Eml->new($bref);
$smsg->{num} = index_mm($self, $eml, $oid, $sync) or
die "E: could not generate NNTP article number for $oid";
add_message($self, $eml, $smsg, $sync);
}
sub unindex_both { # git->cat_async callback
my ($bref, $oid, $type, $size, $self) = @_;
unindex_eml($self, $oid, PublicInbox::Eml->new($bref));
}
# called by public-inbox-index
sub index_sync {
my ($self, $opt) = @_;
delete $self->{lock_path} if $opt->{-skip_lock};
$self->{ibx}->with_umask(\&_index_sync, $self, $opt);
if ($opt->{reindex}) {
my %again = %$opt;
delete @again{qw(rethread reindex)};
index_sync($self, \%again);
}
}
sub check_size { # check_async cb for -index --max-size=...
my ($oid, $type, $size, $arg, $git) = @_;
(($type // '') eq 'blob') or die "E: bad $oid in $git->{git_dir}";
if ($size <= $arg->{max_size}) {
$git->cat_async($oid, $arg->{index_oid}, $arg);
} else {
warn "W: skipping $oid ($size > $arg->{max_size})\n";
}
}
sub v1_checkpoint ($$;$) {
my ($self, $sync, $stk) = @_;
$self->{ibx}->git->check_async_wait;
$self->{ibx}->git->cat_async_wait;
# latest_cmt may be undef
my $newest = $stk ? $stk->{latest_cmt} : undef;
if ($newest) {
my $cur = $self->{mm}->last_commit || '';
if (need_update($self, $cur, $newest)) {
$self->{mm}->last_commit($newest);
}
} else {
${$sync->{max}} = $self->{batch_bytes};
}
$self->{mm}->{dbh}->commit;
if ($newest && need_xapian($self)) {
my $xdb = $self->{xdb};
my $cur = $xdb->get_metadata('last_commit');
if (need_update($self, $cur, $newest)) {
$xdb->set_metadata('last_commit', $newest);
}
# let SearchView know a full --reindex was done so it can
# generate ->has_threadid-dependent links
if ($sync->{reindex} && !ref($sync->{reindex})) {
my $n = $xdb->get_metadata('has_threadid');
$xdb->set_metadata('has_threadid', '1') if $n ne '1';
}
}
$self->{over}->rethread_done($sync->{-opt}) if $newest; # all done
commit_txn_lazy($self);
$self->{ibx}->git->cleanup;
my $nr = ${$sync->{nr}};
idx_release($self, $nr);
# let another process do some work...
if (my $pr = $sync->{-opt}->{-progress}) {
$pr->("indexed $nr/$sync->{ntodo}\n") if $nr;
}
if (!$stk) { # more to come
begin_txn_lazy($self);
$self->{mm}->{dbh}->begin_work;
}
}
# only for v1
sub process_stack {
my ($self, $sync, $stk) = @_;
my $git = $self->{ibx}->git;
my $max = $self->{batch_bytes};
my $nr = 0;
$sync->{nr} = \$nr;
$sync->{max} = \$max;
$sync->{sidx} = $self;
$self->{mm}->{dbh}->begin_work;
if (my @leftovers = keys %{delete($sync->{D}) // {}}) {
warn('W: unindexing '.scalar(@leftovers)." leftovers\n");
for my $oid (@leftovers) {
$oid = unpack('H*', $oid);
$git->cat_async($oid, \&unindex_both, $self);
}
}
if ($sync->{max_size} = $sync->{-opt}->{max_size}) {
$sync->{index_oid} = \&index_both;
}
while (my ($f, $at, $ct, $oid) = $stk->pop_rec) {
if ($f eq 'm') {
my $arg = { %$sync, autime => $at, cotime => $ct };
if ($sync->{max_size}) {
$git->check_async($oid, \&check_size, $arg);
} else {
$git->cat_async($oid, \&index_both, $arg);
}
v1_checkpoint($self, $sync) if $max <= 0;
} elsif ($f eq 'd') {
$git->cat_async($oid, \&unindex_both, $self);
}
}
v1_checkpoint($self, $sync, $stk);
}
sub log2stack ($$$$) {
my ($sync, $git, $range, $ibx) = @_;
my $D = $sync->{D}; # OID_BIN => NR (if reindexing, undef otherwise)
my ($add, $del);
if ($ibx->version == 1) {
my $path = $hex.'{2}/'.$hex.'{38}';
$add = qr!\A:000000 100644 \S+ ($OID) A\t$path$!;
$del = qr!\A:100644 000000 ($OID) \S+ D\t$path$!;
} else {
$del = qr!\A:\d{6} 100644 $OID ($OID) [AM]\td$!;
$add = qr!\A:\d{6} 100644 $OID ($OID) [AM]\tm$!;
}
# Count the new files so they can be added newest to oldest
# and still have numbers increasing from oldest to newest
my $fh = $git->popen(qw(log --raw -r --pretty=tformat:%at-%ct-%H
--no-notes --no-color --no-renames --no-abbrev),
$range);
my ($at, $ct, $stk);
while (<$fh>) {
if (/\A([0-9]+)-([0-9]+)-($OID)$/o) {
($at, $ct) = ($1 + 0, $2 + 0);
$stk //= PublicInbox::IdxStack->new($3);
} elsif (/$del/) {
my $oid = $1;
if ($D) { # reindex case
$D->{pack('H*', $oid)}++;
} else { # non-reindex case:
$stk->push_rec('d', $at, $ct, $oid);
}
} elsif (/$add/) {
my $oid = $1;
if ($D) {
my $oid_bin = pack('H*', $oid);
my $nr = --$D->{$oid_bin};
delete($D->{$oid_bin}) if $nr <= 0;
# nr < 0 (-1) means it never existed
$stk->push_rec('m', $at, $ct, $oid) if $nr < 0;
} else {
$stk->push_rec('m', $at, $ct, $oid);
}
}
}
close $fh or die "git log failed: \$?=$?";
$stk //= PublicInbox::IdxStack->new;
$stk->read_prepare;
}
sub prepare_stack ($$$) {
my ($self, $sync, $range) = @_;
my $git = $self->{ibx}->git;
if (index($range, '..') < 0) {
# don't show annoying git errors to users who run -index
# on empty inboxes
$git->qx(qw(rev-parse -q --verify), "$range^0");
return PublicInbox::IdxStack->new->read_prepare if $?;
}
$sync->{D} = $sync->{reindex} ? {} : undef; # OID_BIN => NR
log2stack($sync, $git, $range, $self->{ibx});
}
# --is-ancestor requires git 1.8.0+
sub is_ancestor ($$$) {
my ($git, $cur, $tip) = @_;
return 0 unless $git->check($cur);
my $cmd = [ 'git', "--git-dir=$git->{git_dir}",
qw(merge-base --is-ancestor), $cur, $tip ];
my $pid = spawn($cmd);
waitpid($pid, 0) == $pid or die join(' ', @$cmd) .' did not finish';
$? == 0;
}
sub need_update ($$$) {
my ($self, $cur, $new) = @_;
my $git = $self->{ibx}->git;
return 1 if $cur && !is_ancestor($git, $cur, $new);
my $range = $cur eq '' ? $new : "$cur..$new";
chomp(my $n = $git->qx(qw(rev-list --count), $range));
($n eq '' || $n > 0);
}
# The last git commit we indexed with Xapian or SQLite (msgmap)
# This needs to account for cases where Xapian or SQLite is
# out-of-date with respect to the other.
sub _last_x_commit {
my ($self, $mm) = @_;
my $lm = $mm->last_commit || '';
my $lx = '';
if (need_xapian($self)) {
$lx = $self->{xdb}->get_metadata('last_commit') || '';
} else {
$lx = $lm;
}
# Use last_commit from msgmap if it is older or unset
if (!$lm || ($lx && $lm && is_ancestor($self->{ibx}->git, $lm, $lx))) {
$lx = $lm;
}
$lx;
}
sub reindex_from ($$) {
my ($reindex, $last_commit) = @_;
return $last_commit unless $reindex;
ref($reindex) eq 'HASH' ? $reindex->{from} : '';
}
# indexes all unindexed messages (v1 only)
sub _index_sync {
my ($self, $opt) = @_;
my $tip = $opt->{ref} || 'HEAD';
my $git = $self->{ibx}->git;
$self->{batch_bytes} = $opt->{batch_size} // $BATCH_BYTES;
$git->batch_prepare;
my $pr = $opt->{-progress};
my $sync = { reindex => $opt->{reindex}, -opt => $opt };
my $xdb = $self->begin_txn_lazy;
$self->{over}->rethread_prepare($opt);
my $mm = _msgmap_init($self);
if ($sync->{reindex}) {
my $last = $mm->last_commit;
if ($last) {
$tip = $last;
} else {
# somebody just blindly added --reindex when indexing
# for the first time, allow it:
undef $sync->{reindex};
}
}
my $last_commit = _last_x_commit($self, $mm);
my $lx = reindex_from($sync->{reindex}, $last_commit);
my $range = $lx eq '' ? $tip : "$lx..$tip";
$pr->("counting changes\n\t$range ... ") if $pr;
my $stk = prepare_stack($self, $sync, $range);
$sync->{ntodo} = $stk ? $stk->num_records : 0;
$pr->("$sync->{ntodo}\n") if $pr; # continue previous line
process_stack($self, $sync, $stk);
}
sub DESTROY {
# order matters for unlocking
$_[0]->{xdb} = undef;
$_[0]->{lockfh} = undef;
}
sub _begin_txn {
my ($self) = @_;
my $xdb = $self->{xdb} || idx_acquire($self);
$self->{over}->begin_lazy if $self->{over};
$xdb->begin_transaction if $xdb;
$self->{txn} = 1;
$xdb;
}
sub begin_txn_lazy {
my ($self) = @_;
$self->{ibx}->with_umask(\&_begin_txn, $self) if !$self->{txn};
}
# store 'indexlevel=medium' in v2 shard=0 and v1 (only one shard)
# This metadata is read by Admin::detect_indexlevel:
sub set_metadata_once {
my ($self) = @_;
return if $self->{shard}; # only continue if undef or 0, not >0
my $xdb = $self->{xdb};
if (delete($self->{-set_has_threadid_once})) {
$xdb->set_metadata('has_threadid', '1');
}
if (delete($self->{-set_indexlevel_once})) {
my $level = $xdb->get_metadata('indexlevel');
if (!$level || $level ne 'medium') {
$xdb->set_metadata('indexlevel', 'medium');
}
}
if (delete($self->{-set_skip_docdata_once})) {
$xdb->get_metadata('skip_docdata') or
$xdb->set_metadata('skip_docdata', '1');
}
}
sub _commit_txn {
my ($self) = @_;
if (my $xdb = $self->{xdb}) {
set_metadata_once($self);
$xdb->commit_transaction;
}
$self->{over}->commit_lazy if $self->{over};
}
sub commit_txn_lazy {
my ($self) = @_;
delete($self->{txn}) and
$self->{ibx}->with_umask(\&_commit_txn, $self);
}
sub worker_done {
my ($self) = @_;
if (need_xapian($self)) {
die "$$ $0 xdb not released\n" if $self->{xdb};
}
die "$$ $0 still in transaction\n" if $self->{txn};
}
1;