# Copyright (C) all contributors # License: AGPL-3.0+ # "lei add-external --mirror" support (also "public-inbox-clone"); package PublicInbox::LeiMirror; use v5.12; use parent qw(PublicInbox::IPC); use IO::Uncompress::Gunzip qw(gunzip $GunzipError); use IO::Compress::Gzip qw(gzip $GzipError); use PublicInbox::Spawn qw(popen_rd spawn run_die); use File::Path (); use File::Temp (); use File::Spec (); use Fcntl qw(SEEK_SET O_CREAT O_EXCL O_WRONLY); use Carp qw(croak); use URI; use PublicInbox::Config; use PublicInbox::Inbox; use PublicInbox::LeiCurl; use PublicInbox::OnDestroy; use Digest::SHA qw(sha256_hex sha1_hex); our $LIVE; # pid => callback sub keep_going ($) { $LIVE && (!$_[0]->{lei}->{child_error} || $_[0]->{lei}->{opt}->{'keep-going'}); } sub _wq_done_wait { # dwaitpid callback (via wq_eof) my ($arg, $pid) = @_; my ($mrr, $lei) = @$arg; my $f = "$mrr->{dst}/mirror.done"; if ($?) { $lei->child_error($?); } elsif (!$mrr->{dry_run} && !unlink($f)) { warn("unlink($f): $!\n") unless $!{ENOENT}; } else { if (!$mrr->{dry_run} && $lei->{cmd} ne 'public-inbox-clone') { require PublicInbox::LeiAddExternal; PublicInbox::LeiAddExternal::_finish_add_external( $lei, $mrr->{dst}); } $lei->qerr("# mirrored $mrr->{src} => $mrr->{dst}"); } $lei->dclose; } # for old installations without manifest.js.gz sub try_scrape { my ($self, $fallback_manifest) = @_; my $uri = URI->new($self->{src}); my $lei = $self->{lei}; my $curl = $self->{curl} //= PublicInbox::LeiCurl->new($lei) or return; my $cmd = $curl->for_uri($lei, $uri, qw(-f --compressed)); my $opt = { 0 => $lei->{0}, 2 => $lei->{2} }; my $fh = popen_rd($cmd, undef, $opt); my $html = do { local $/; <$fh> } // die "read(curl $uri): $!"; close($fh) or return $lei->child_error($?, "@$cmd failed"); # we grep with URL below, we don't want Subject/From headers # making us clone random URLs. This assumes remote instances # prior to public-inbox 1.7.0 # 5b96edcb1e0d8252 (www: move mirror instructions to /text/, 2021-08-28) my @html = split(/
/, $html); my @urls = ($html[-1] =~ m!\bgit clone --mirror ([a-z\+]+://\S+)!g); if (!@urls && $fallback_manifest) { warn <as_string; chop($url) eq '/' or die "BUG: $uri not canonicalized"; # since this is for old instances w/o manifest.js.gz, try v1 first return clone_v1($self) if grep(m!\A\Q$url\E/*\z!, @urls); if (my @v2_urls = grep(m!\A\Q$url\E/[0-9]+\z!, @urls)) { my %v2_epochs = map { my ($n) = (m!/([0-9]+)\z!); $n => [ URI->new($_), '' ] } @v2_urls; # uniq clone_v2_prep($self, \%v2_epochs); delete local $lei->{opt}->{epoch}; clone_all($self); return; } # filter out common URLs served by WWW (e.g /$MSGID/T/) if (@urls && $url =~ s!/+[^/]+\@[^/]+/.*\z!! && grep(m!\A\Q$url\E/*\z!, @urls)) { die <<""; E: confused by scraping <$uri>, did you mean <$url>? } @urls and die <<""; E: confused by scraping <$uri>, got ambiguous results: @urls die "E: scraping <$uri> revealed nothing\n"; } sub clone_cmd { my ($lei, $opt) = @_; my @cmd = qw(git); $opt->{$_} = $lei->{$_} for (0..2); # we support "-c $key=$val" for arbitrary git config options # e.g.: git -c http.proxy=socks5h://127.0.0.1:9050 push(@cmd, '-c', $_) for @{$lei->{opt}->{c} // []}; push @cmd, qw(clone --mirror); push @cmd, '-q' if $lei->{opt}->{quiet} || ($lei->{opt}->{jobs} // 1) > 1; push @cmd, '-v' if $lei->{opt}->{verbose}; # XXX any other options to support? # --reference is tricky with multiple epochs, but handled # automatically if using manifest.js.gz @cmd; } sub ft_rename ($$$;$) { my ($ft, $dst, $open_mode, $fh) = @_; my @st = stat($fh // $dst); my $mode = @st ? ($st[2] & 07777) : ($open_mode & ~umask); chmod($mode, $ft) or croak "E: chmod($ft): $!"; require File::Copy; File::Copy::mv($ft->filename, $dst) or croak "E: mv($ft => $dst): $!"; $ft->unlink_on_destroy(0); } sub do_reap ($;$) { my ($self, $jobs) = @_; $jobs //= $self->{-jobs} //= $self->{lei}->{opt}->{jobs} // 1; $jobs = 1 if $jobs < 1; while (keys(%$LIVE) >= $jobs) { my $pid = waitpid(-1, 0) // die "waitpid(-1): $!"; if (my $x = delete $LIVE->{$pid}) { my $cb = shift @$x; $cb->(@$x) if $cb; } else { warn "reaped unknown PID=$pid ($?)\n"; } } } sub _get_txt_start { # non-fatal my ($self, $endpoint, $fini) = @_; my $uri = URI->new($self->{cur_src} // $self->{src}); my $lei = $self->{lei}; my $path = $uri->path; chop($path) eq '/' or die "BUG: $uri not canonicalized"; $uri->path("$path/$endpoint"); my $f = (split(m!/!, $endpoint))[-1]; my $ft = File::Temp->new(TEMPLATE => "$f-XXXX", TMPDIR => 1); my $opt = { 0 => $lei->{0}, 1 => $lei->{1}, 2 => $lei->{2} }; my $cmd = $self->{curl}->for_uri($lei, $uri, qw(-f --compressed -R -o), $ft->filename); do_reap($self); $lei->qerr("# @$cmd"); return if $self->{dry_run}; $self->{"-get_txt.$endpoint"} = [ $ft, $cmd, $uri ]; $LIVE->{spawn($cmd, undef, $opt)} = [ \&_get_txt_done, $self, $endpoint, $fini ]; } sub _get_txt_done { # returns true on error (non-fatal), undef on success my ($self, $endpoint) = @_; my ($fh, $cmd, $uri) = @{delete $self->{"-get_txt.$endpoint"}}; my $cerr = $?; $? = 0; # don't influence normal lei exit return warn("$uri missing\n") if ($cerr >> 8) == 22; return warn("# @$cmd failed (non-fatal)\n") if $cerr; seek($fh, SEEK_SET, 0) or die "seek: $!"; $self->{"mtime.$endpoint"} = (stat($fh))[9]; local $/; $self->{"txt.$endpoint"} = <$fh>; undef; # success } sub _write_inbox_config { my ($self) = @_; my $buf = delete($self->{'txt._/text/config/raw'}) // return; my $dst = $self->{cur_dst} // $self->{dst}; my $f = "$dst/inbox.config.example"; open my $fh, '>', $f or die "open($f): $!"; print $fh $buf or die "print: $!"; chmod(0444 & ~umask, $fh) or die "chmod($f): $!"; my $mtime = delete $self->{'mtime._/text/config/raw'}; $fh->flush or die "flush($f): $!"; if (defined $mtime) { utime($mtime, $mtime, $fh) or die "utime($f): $!"; } my $cfg = PublicInbox::Config->git_config_dump($f, $self->{lei}->{2}); my $ibx = $self->{ibx} = {}; for my $sec (grep(/\Apublicinbox\./, @{$cfg->{-section_order}})) { for (qw(address newsgroup nntpmirror)) { $ibx->{$_} = $cfg->{"$sec.$_"}; } } } sub set_description ($) { my ($self) = @_; my $dst = $self->{cur_dst} // $self->{dst}; my $f = "$dst/description"; open my $fh, '+>>', $f or die "open($f): $!"; seek($fh, 0, SEEK_SET) or die "seek($f): $!"; my $d = do { local $/; <$fh> } // die "read($f): $!"; chomp(my $orig = $d); while (defined($d) && ($d =~ m!^\(\$INBOX_DIR/description missing\)! || $d =~ /^Unnamed repository/ || $d !~ /\S/)) { $d = delete($self->{'txt.description'}); } $d //= 'mirror of '.($self->{cur_src} // $self->{src}); chomp $d; return if $d eq $orig; seek($fh, 0, SEEK_SET) or die "seek($f): $!"; truncate($fh, 0) or die "truncate($f): $!"; print $fh $d, "\n" or die "print($f): $!"; close $fh or die "close($f): $!"; } sub index_cloned_inbox { my ($self, $iv) = @_; my $lei = $self->{lei}; # n.b. public-inbox-clone works w/o (SQLite || Xapian) # lei is useless without Xapian + SQLite if ($lei->{cmd} ne 'public-inbox-clone') { require PublicInbox::InboxWritable; require PublicInbox::Admin; my $ibx = delete($self->{ibx}) // { address => [ 'lei@example.com' ], version => $iv, }; $ibx->{inboxdir} = $self->{cur_dst} // $self->{dst}; PublicInbox::Inbox->new($ibx); PublicInbox::InboxWritable->new($ibx); my $opt = {}; for my $sw ($lei->index_opt) { my ($k) = ($sw =~ /\A([\w-]+)/); $opt->{$k} = $lei->{opt}->{$k}; } # force synchronous dwaitpid for v2: local $PublicInbox::DS::in_loop = 0; my $cfg = PublicInbox::Config->new(undef, $lei->{2}); my $env = PublicInbox::Admin::index_prepare($opt, $cfg); local %ENV = (%ENV, %$env) if $env; PublicInbox::Admin::progress_prepare($opt, $lei->{2}); PublicInbox::Admin::index_inbox($ibx, undef, $opt); } return if defined $self->{cur_dst}; # one of many repos to clone open my $x, '>', "$self->{dst}/mirror.done"; # for _wq_done_wait } sub run_reap { my ($lei, $cmd, $opt) = @_; $lei->qerr("# @$cmd"); waitpid(spawn($cmd, undef, $opt), 0) // die "waitpid: $!"; my $ret = $?; $? = 0; # don't let it influence normal exit $ret; } sub start_cmd { my ($self, $cmd, $opt, $fini) = @_; do_reap($self); $self->{lei}->qerr("# @$cmd"); return if $self->{dry_run}; $LIVE->{spawn($cmd, undef, $opt)} = [ \&reap_cmd, $self, $cmd, $fini ] } sub fetch_args ($$) { my ($lei, $opt) = @_; my @cmd; # (git --git-dir=...) to be added by caller $opt->{$_} = $lei->{$_} for (0..2); # we support "-c $key=$val" for arbitrary git config options # e.g.: git -c http.proxy=socks5h://127.0.0.1:9050 push(@cmd, '-c', $_) for @{$lei->{opt}->{c} // []}; push @cmd, 'fetch'; push @cmd, '-q' if $lei->{opt}->{quiet} || ($lei->{opt}->{jobs} // 1) > 1; push @cmd, '-v' if $lei->{opt}->{verbose}; push(@cmd, '-p') if $lei->{opt}->{prune}; @cmd; } sub upr { # feed `git update-ref --stdin -z' verbosely my ($lei, $w, $op, @rest) = @_; # ($ref, $oid) = @rest $lei->qerr("# $op @rest") if $lei->{opt}->{verbose}; print $w "$op ", join("\0", @rest, '') or die "print(w): $!"; } sub fgrp_update { my ($fgrp) = @_; return if !keep_going($fgrp); my $srcfh = delete $fgrp->{srcfh} or return; my $dstfh = delete $fgrp->{dstfh} or return; seek($srcfh, SEEK_SET, 0) or die "seek(src): $!"; seek($dstfh, SEEK_SET, 0) or die "seek(dst): $!"; my %src = map { chomp; split(/\0/) } (<$srcfh>); close $srcfh; my %dst = map { chomp; split(/\0/) } (<$dstfh>); close $dstfh; pipe(my ($r, $w)) or die "pipe: $!"; my $cmd = [ 'git', "--git-dir=$fgrp->{cur_dst}", qw(update-ref --stdin -z) ]; my $lei = $fgrp->{lei}; $lei->qerr("# @$cmd"); my $opt = { 0 => $r, 2 => $lei->{2} }; my $pid = spawn($cmd, undef, $opt); close $r or die "close(r): $!"; for my $ref (keys %dst) { my $new = delete $src{$ref}; my $old = $dst{$ref}; if (defined $new) { $new eq $old or upr($lei, $w, 'update', $ref, $new, $old); } else { upr($lei, $w, 'delete', $ref, $old); } } while (my ($ref, $oid) = each %src) { upr($lei, $w, 'create', $ref, $oid); } close($w) or warn "E: close(update-ref --stdin): $! (need git 1.8.5+)\n"; my $pack = PublicInbox::OnDestroy->new($$, \&pack_dst, $fgrp); $LIVE->{$pid} = [ \&reap_cmd, $fgrp, $cmd, $pack ]; } sub pack_dst { # packs lightweight satellite repos my ($fgrp) = @_; pack_refs($fgrp, $fgrp->{cur_dst}); } sub pack_refs { my ($self, $git_dir) = @_; do_reap($self); return if !keep_going($self); my $cmd = [ 'git', "--git-dir=$git_dir", qw(pack-refs --all --prune) ]; $self->{lei}->qerr("# @$cmd"); return if $self->{dry_run}; my $opt = { 2 => $self->{lei}->{2} }; $LIVE->{spawn($cmd, undef, $opt)} = [ \&reap_cmd, $self, $cmd ]; } sub fgrpv_done { my ($fgrpv) = @_; return if !$LIVE; my $pid; my $first = $fgrpv->[0] // die 'BUG: no fgrpv->[0]'; return if !keep_going($first); pack_refs($first, $first->{-osdir}); # objstore refs always packed for my $fgrp (@$fgrpv) { my $rn = $fgrp->{-remote}; my %opt = ( 2 => $fgrp->{lei}->{2} ); my $update_ref = $fgrp->{dry_run} ? undef : PublicInbox::OnDestroy->new($$, \&fgrp_update, $fgrp); my $src = [ 'git', "--git-dir=$fgrp->{-osdir}", 'for-each-ref', "--format=refs/%(refname:lstrip=3)%00%(objectname)", "refs/remotes/$rn/" ]; do_reap($fgrp); $fgrp->{lei}->qerr("# @$src >SRC"); if ($update_ref) { open(my $fh, '+>', undef) or die "open(src): $!"; $pid = spawn($src, undef, { %opt, 1 => $fh }); $fgrp->{srcfh} = $fh; $LIVE->{$pid} = [ \&reap_cmd, $fgrp, $src, $update_ref ] } my $dst = [ 'git', "--git-dir=$fgrp->{cur_dst}", 'for-each-ref', '--format=%(refname)%00%(objectname)' ]; do_reap($fgrp); $fgrp->{lei}->qerr("# @$dst >DST"); if ($update_ref) { open(my $fh, '+>', undef) or die "open(dst): $!"; $pid = spawn($dst, undef, { %opt, 1 => $fh }); $fgrp->{dstfh} = $fh; $LIVE->{$pid} = [ \&reap_cmd, $fgrp, $dst, $update_ref ] } } } sub fgrp_fetch_all { my ($self) = @_; my $todo = delete $self->{fgrp_todo} or return; keys(%$todo) or return; # Rely on the fgrptmp remote groups in the config file rather # than listing all remotes since the remote name list may exceed # system argv limits: my $grp = 'fgrptmp'; my @git = (@{$self->{-torsocks}}, 'git'); my $j = $self->{lei}->{opt}->{jobs}; my $opt = {}; my @fetch = do { local $self->{lei}->{opt}->{jobs} = 1; (fetch_args($self->{lei}, $opt), qw(--no-tags --multiple)); }; push(@fetch, "-j$j") if $j; my $pid; while (my ($osdir, $fgrpv) = each %$todo) { my $f = "$osdir/config"; # clobber group from previous run atomically my $cmd = ['git', "--git-dir=$osdir", qw(config -f), $f, '--unset-all', "remotes.$grp"]; $self->{lei}->qerr("# @$cmd"); if (!$self->{dry_run}) { $pid = spawn($cmd, undef, { 2 => $self->{lei}->{2} }); waitpid($pid, 0) // die "waitpid: $!"; die "E: @$cmd: \$?=$?" if ($? && ($? >> 8) != 5); # update the config atomically via O_APPEND while # respecting git-config locking sysopen(my $lk, "$f.lock", O_CREAT|O_EXCL|O_WRONLY) or die "open($f.lock): $!"; open my $fh, '>>', $f or die "open(>>$f): $!"; $fh->autoflush(1); my $buf = join('', "[remotes]\n", map { "\t$grp = $_->{-remote}\n" } @$fgrpv); print $fh $buf or die "print($f): $!"; close $fh or die "close($f): $!"; unlink("$f.lock") or die "unlink($f.lock): $!"; } $cmd = [ @git, "--git-dir=$osdir", @fetch, $grp ]; do_reap($self); $self->{lei}->qerr("# @$cmd"); my $end = PublicInbox::OnDestroy->new($$, \&fgrpv_done, $fgrpv); return if $self->{dry_run}; $pid = spawn($cmd, undef, $opt); $LIVE->{$pid} = [ \&reap_cmd, $self, $cmd, $end ]; } } # keep this idempotent for future use by public-inbox-fetch sub forkgroup_prep { my ($self, $uri) = @_; $self->{-ent} // return; my $os = $self->{-objstore} // return; my $fg = $self->{-ent}->{forkgroup} // return; my $dir = "$os/$fg.git"; if (!-d $dir && !$self->{dry_run}) { PublicInbox::Import::init_bare($dir); my @cmd = ('git', "--git-dir=$dir", 'config'); my $opt = { 2 => $self->{lei}->{2} }; for ('repack.useDeltaIslands=true', 'pack.island=refs/remotes/([^/]+)/') { run_die([@cmd, split(/=/, $_, 2)], undef, $opt); } } my $key = $self->{-key} // die 'BUG: no -key'; my $rn = substr(sha256_hex($key), 0, 16); if (!-d $self->{cur_dst} && !$self->{dry_run}) { my $alt = File::Spec->rel2abs("$dir/objects"); PublicInbox::Import::init_bare($self->{cur_dst}); my $o = "$self->{cur_dst}/objects"; my $f = "$o/info/alternates"; my $l = File::Spec->abs2rel($alt, File::Spec->rel2abs($o)); open my $fh, '+>>', $f or die "open($f): $!"; seek($fh, SEEK_SET, 0) or die "seek($f): $!"; chomp(my @cur = <$fh>); if (!grep(/\A\Q$l\E\z/, @cur)) { say $fh $l or die "say($f): $!"; } close $fh or die "close($f): $!"; $f = "$self->{cur_dst}/config"; open $fh, '+>>', $f or die "open:($f): $!"; print $fh < $dir, -remote => $rn, -uri => $uri }, __PACKAGE__; } sub fp_done { my ($self, $go_fetch) = @_; return if !keep_going($self); my $fh = delete $self->{-show_ref} // die 'BUG: no show-ref output'; seek($fh, SEEK_SET, 0) or die "seek(show_ref): $!"; $self->{-ent} // die 'BUG: no -ent'; my $A = $self->{-ent}->{fingerprint} // die 'BUG: no fingerprint'; my $B = sha1_hex(do { local $/; <$fh> } // die("read(show_ref): $!")); return if $A ne $B; # $go_fetch->DESTROY fires $go_fetch->cancel; $self->{lei}->qerr("# $self->{-key} up-to-date"); } sub cmp_fp_fetch { my ($self, $go_fetch) = @_; # $go_fetch is either resume_fetch or fgrp_enqueue my $new = $self->{-ent}->{fingerprint} // die 'BUG: no fingerprint'; my $key = $self->{-key} // die 'BUG: no -key'; if (my $cur_ent = $self->{-local_manifest}->{$key}) { # runs go_fetch->DESTROY run if eq return $go_fetch->cancel if $cur_ent->{fingerprint} eq $new; } my $dst = $self->{cur_dst} // $self->{dst}; my $cmd = ['git', "--git-dir=$dst", 'show-ref']; my $opt = { 2 => $self->{lei}->{2} }; open($opt->{1}, '+>', undef) or die "open(tmp): $!"; $self->{-show_ref} = $opt->{1}; my $done = PublicInbox::OnDestroy->new($$, \&fp_done, $self, $go_fetch); start_cmd($self, $cmd, $opt, $done); } sub resume_fetch_maybe { my ($self, $uri, $fini) = @_; my $go_fetch = PublicInbox::OnDestroy->new($$, \&resume_fetch, @_); cmp_fp_fetch($self, $go_fetch) if $self->{-ent} && defined($self->{-ent}->{fingerprint}); } sub resume_fetch { my ($self, $uri, $fini) = @_; return if !keep_going($self); my $dst = $self->{cur_dst} // $self->{dst}; my @git = ('git', "--git-dir=$dst"); my $opt = { 2 => $self->{lei}->{2} }; my $rn = 'origin'; # configurable? for ("url=$uri", "fetch=+refs/*:refs/*", 'mirror=true') { my @kv = split(/=/, $_, 2); $kv[0] = "remote.$rn.$kv[0]"; next if $self->{dry_run}; run_die([@git, 'config', @kv], undef, $opt); } my $cmd = [ @{$self->{-torsocks}}, @git, fetch_args($self->{lei}, $opt), $rn ]; push @$cmd, '-P' if $self->{lei}->{prune}; # --prune-tags implied start_cmd($self, $cmd, $opt, $fini); } sub fgrp_enqueue_maybe { my ($self, $fgrp) = @_; my $enq = PublicInbox::OnDestroy->new($$, \&fgrp_enqueue, $self, $fgrp); cmp_fp_fetch($self, $enq) if $self->{-ent} && defined($self->{-ent}->{fingerprint}); # $enq->DESTROY calls fgrp_enqueue otherwise } sub fgrp_enqueue { my ($self, $fgrp) = @_; return if !keep_going($self); my $opt = { 2 => $self->{lei}->{2} }; # --no-tags is required to avoid conflicts my $u = $fgrp->{-uri} // die 'BUG: no {-uri}'; my $rn = $fgrp->{-remote} // die 'BUG: no {-remote}'; my @cmd = ('git', "--git-dir=$fgrp->{-osdir}", 'config'); for ("url=$u", "fetch=+refs/*:refs/remotes/$rn/*", 'tagopt=--no-tags') { my @kv = split(/=/, $_, 2); $kv[0] = "remote.$rn.$kv[0]"; $self->{dry_run} ? $self->{lei}->qerr("# @cmd @kv") : run_die([@cmd, @kv], undef, $opt); } push @{$self->{fgrp_todo}->{$fgrp->{-osdir}}}, $fgrp; } sub clone_v1 { my ($self, $nohang) = @_; my $lei = $self->{lei}; my $curl = $self->{curl} //= PublicInbox::LeiCurl->new($lei) or return; my $uri = URI->new($self->{cur_src} // $self->{src}); defined($lei->{opt}->{epoch}) and die "$uri is a v1 inbox, --epoch is not supported\n"; $self->{-torsocks} //= $curl->torsocks($lei, $uri) or return; my $dst = $self->{cur_dst} // $self->{dst}; my $fini = PublicInbox::OnDestroy->new($$, \&v1_done, $self); my $resume = -d $dst; if (my $fgrp = forkgroup_prep($self, $uri)) { $fgrp->{-fini} = $fini; $resume ? fgrp_enqueue_maybe($self, $fgrp) : fgrp_enqueue($self, $fgrp); } elsif ($resume) { resume_fetch_maybe($self, $uri, $fini); } else { # normal clone my $cmd = [ @{$self->{-torsocks}}, clone_cmd($lei, my $opt = {}), "$uri", $dst ]; if (defined($self->{-ent})) { if (defined(my $ref = $self->{-ent}->{reference})) { -e "$self->{dst}$ref" and push @$cmd, '--reference', "$self->{dst}$ref"; } } start_cmd($self, $cmd, $opt, $fini); } if (!$self->{-is_epoch} && $lei->{opt}->{'inbox-config'} =~ /\A(?:always|v1)\z/s) { _get_txt_start($self, '_/text/config/raw', $fini); } my $d = $self->{-ent} ? $self->{-ent}->{description} : undef; $self->{'txt.description'} = $d if defined $d; (!defined($d) && !$nohang) and _get_txt_start($self, 'description', $fini); $nohang or do_reap($self, 1); # for non-manifest clone } sub parse_epochs ($$) { my ($opt_epochs, $v2_epochs) = @_; # $epochs "LOW..HIGH" $opt_epochs // return; # undef => all epochs my ($lo, $dotdot, $hi, @extra) = split(/(\.\.)/, $opt_epochs); undef($lo) if ($lo // '') eq ''; my $re = qr/\A~?[0-9]+\z/; if (@extra || (($lo // '0') !~ $re) || (($hi // '0') !~ $re) || !(grep(defined, $lo, $hi))) { die < $b } keys %$v2_epochs; for (grep(defined, $lo, $hi)) { if (/\A[0-9]+\z/) { $_ > $n[-1] and die "`$_' exceeds maximum available epoch ($n[-1])\n"; $_ < $n[0] and die "`$_' is lower than minimum available epoch ($n[0])\n"; } elsif (/\A~([0-9]+)/) { my $off = -$1 - 1; $n[$off] // die "`$_' is out of range\n"; $_ = $n[$off]; } else { die "`$_' not understood\n" } } defined($lo) && defined($hi) && $lo > $hi and die "low value (`$lo') exceeds high (`$hi')\n"; $lo //= $n[0] if $dotdot; $hi //= $n[-1] if $dotdot; $hi //= $lo; my $want = {}; for ($lo..$hi) { if (defined $v2_epochs->{$_}) { $want->{$_} = 1; } else { warn "# epoch $_ is not available (non-fatal, $lo..$hi)\n"; } } $want } sub init_placeholder ($$$) { my ($src, $edst, $ent) = @_; PublicInbox::Import::init_bare($edst); my $f = "$edst/config"; open my $fh, '>>', $f or die "open($f): $!"; print $fh <{owner})) { print $fh <{owner} EOM } close $fh or die "close($f): $!"; my %map = (head => 'HEAD', description => undef); while (my ($key, $fn) = each %map) { my $val = $ent->{$key} // next; $fn //= $key; $fn = "$edst/$fn"; open $fh, '>', $fn or die "open($fn): $!"; print $fh $val, "\n" or die "print($fn): $!"; close $fh or die "close($fn): $!"; } } sub reap_cmd { # async, called via SIGCHLD my ($self, $cmd) = @_; my $cerr = $?; $? = 0; # don't let it influence normal exit $self->{lei}->child_error($cerr, "@$cmd failed (\$?=$cerr)") if $cerr; } sub v1_done { # called via OnDestroy my ($self) = @_; return if $self->{dry_run} || !keep_going($self); _write_inbox_config($self); my $dst = $self->{cur_dst} // $self->{dst}; if (defined(my $o = $self->{-ent} ? $self->{-ent}->{owner} : undef)) { my $key = $self->{-key} // die 'BUG: no -key'; my $cur = $self->{-local_manifest}->{$key}->{owner} // "\0"; $cur eq $o or run_die([qw(git config -f), "$dst/config", 'gitweb.owner', $o]); } my $o = "$dst/objects"; if (open(my $fh, '<', my $fn = "$o/info/alternates")) {; my $base = File::Spec->rel2abs($o); my @l = <$fh>; my $ft; for (@l) { next unless m!\A/!; $_ = File::Spec->abs2rel($_, $base); $ft //= File::Temp->new(TEMPLATE => '.XXXX', DIR => "$o/info"); } if ($ft) { print $ft @l or die "print($ft): $!"; $ft->flush or die "flush($ft): $!"; ft_rename($ft, $fn, 0666, $fh); } } eval { set_description($self) }; warn $@ if $@; return if ($self->{-is_epoch} || $self->{lei}->{opt}->{'inbox-config'} ne 'always'); write_makefile($dst, 1); index_cloned_inbox($self, 1); } sub v2_done { # called via OnDestroy my ($self) = @_; return if $self->{dry_run} || !keep_going($self); my $dst = $self->{cur_dst} // $self->{dst}; require PublicInbox::Lock; my $lk = bless { lock_path => "$dst/inbox.lock" }, 'PublicInbox::Lock'; my $lck = $lk->lock_for_scope($$); _write_inbox_config($self); require PublicInbox::MultiGit; my $mg = PublicInbox::MultiGit->new($dst, 'all.git', 'git'); $mg->fill_alternates; for my $i ($mg->git_epochs) { $mg->epoch_cfg_set($i) } for my $edst (@{delete($self->{-read_only}) // []}) { my @st = stat($edst) or die "stat($edst): $!"; chmod($st[2] & 0555, $edst) or die "chmod(a-w, $edst): $!"; } write_makefile($dst, 2); undef $lck; # unlock eval { set_description($self) }; warn $@ if $@; index_cloned_inbox($self, 2); } sub clone_v2_prep ($$;$) { my ($self, $v2_epochs, $m) = @_; # $m => manifest.js.gz hashref my $lei = $self->{lei}; my $curl = $self->{curl} //= PublicInbox::LeiCurl->new($lei) or return; my $first_uri = (map { $_->[0] } values %$v2_epochs)[0]; $self->{-torsocks} //= $curl->torsocks($lei, $first_uri) or return; my $dst = $self->{cur_dst} // $self->{dst}; my $want = parse_epochs($lei->{opt}->{epoch}, $v2_epochs); my $task = $m ? bless { %$self }, __PACKAGE__ : $self; delete $task->{todo}; # $self->{todo} still exists my (@skip, $desc); my $fini = PublicInbox::OnDestroy->new($$, \&v2_done, $task); for my $nr (sort { $a <=> $b } keys %$v2_epochs) { my ($uri, $key) = @{$v2_epochs->{$nr}}; my $src = $uri->as_string; my $edst = $dst; $src =~ m!/([0-9]+)(?:\.git)?\z! or die <<""; failed to extract epoch number from $src $1 + 0 == $nr or die "BUG: <$uri> miskeyed $1 != $nr"; $edst .= "/git/$nr.git"; my $ent; if ($m) { $ent = $m->{$key} // die("BUG: `$key' not in manifest.js.gz"); if (defined(my $d = $ent->{description})) { $d =~ s/ \[epoch [0-9]+\]\z//s; $desc = $d; } } if (!$want || $want->{$nr}) { my $etask = bless { %$task, -key => $key }, __PACKAGE__; $etask->{-ent} = $ent; # may have {reference} $etask->{cur_src} = $src; $etask->{cur_dst} = $edst; $etask->{-is_epoch} = $fini; my $ref = $ent->{reference} // ''; push @{$self->{todo}->{$ref}}, $etask; $self->{any_want}->{$key} = 1; } else { # create a placeholder so users only need to chmod +w init_placeholder($src, $edst, $ent); push @{$task->{-read_only}}, $edst; push @skip, $key; } } # filter out the epochs we skipped $self->{-culled_manifest} = 1 if $m && delete(@$m{@skip}); (!$self->{dry_run} && !-d $dst) and File::Path::mkpath($dst); $lei->{opt}->{'inbox-config'} =~ /\A(?:always|v2)\z/s and _get_txt_start($task, '_/text/config/raw', $fini); defined($desc) ? ($task->{'txt.description'} = $desc) : _get_txt_start($task, 'description', $fini); } sub decode_manifest ($$$) { my ($fh, $fn, $uri) = @_; my $js; my $gz = do { local $/; <$fh> } // die "slurp($fn): $!"; gunzip(\$gz => \$js, MultiStream => 1) or die "gunzip($uri): $GunzipError\n"; my $m = eval { PublicInbox::Config->json->decode($js) }; die "$uri: error decoding `$js': $@\n" if $@; ref($m) eq 'HASH' or die "$uri unknown type: ".ref($m); $m; } sub load_current_manifest ($) { my ($self) = @_; my $fn = $self->{-manifest} // return; if (open(my $fh, '<', $fn)) { decode_manifest($fh, $fn, $fn); } elsif ($!{ENOENT}) { # non-fatal, we can just do it slowly warn "open($fn): $!\n" if -d $self->{dst}; undef; } else { die "open($fn): $!\n"; } } sub multi_inbox ($$$) { my ($self, $path, $m) = @_; my $incl = $self->{lei}->{opt}->{include}; my $excl = $self->{lei}->{opt}->{exclude}; # assuming everything not v2 is v1, for now my @v1 = sort grep(!m!.+/git/[0-9]+\.git\z!, keys %$m); my @v2_epochs = sort grep(m!.+/git/[0-9]+\.git\z!, keys %$m); my $v2 = {}; for (@v2_epochs) { m!\A(/.+)/git/[0-9]+\.git\z! or die "BUG: $_"; push @{$v2->{$1}}, $_; } my $n = scalar(keys %$v2) + scalar(@v1); my @orig = defined($incl // $excl) ? (keys %$v2, @v1) : (); if (defined $incl) { my $re = '(?:'.join('\\z|', map { $self->{lei}->glob2re($_) // qr/\A\Q$_\E/ } @$incl).'\\z)'; my @gone = delete @$v2{grep(!/$re/, keys %$v2)}; delete @$m{map { @$_ } @gone} and $self->{-culled_manifest} = 1; delete @$m{grep(!/$re/, @v1)} and $self->{-culled_manifest} = 1; @v1 = grep(/$re/, @v1); } if (defined $excl) { my $re = '(?:'.join('\\z|', map { $self->{lei}->glob2re($_) // qr/\A\Q$_\E/ } @$excl).'\\z)'; my @gone = delete @$v2{grep(/$re/, keys %$v2)}; delete @$m{map { @$_ } @gone} and $self->{-culled_manifest} = 1; delete @$m{grep(/$re/, @v1)} and $self->{-culled_manifest} = 1; @v1 = grep(!/$re/, @v1); } my $ret; # { v1 => [ ... ], v2 => { "/$inbox_name" => [ epochs ] }} $ret->{v1} = \@v1 if @v1; $ret->{v2} = $v2 if keys %$v2; $ret //= @orig ? "Nothing to clone, available repositories:\n\t". join("\n\t", sort @orig) : "Nothing available to clone\n"; my $path_pfx = ''; # PSGI mount prefixes and manifest.js.gz prefixes don't always align... if (@v2_epochs) { until (grep(m!\A\Q$$path\E/git/[0-9]+\.git\z!, @v2_epochs) == @v2_epochs) { $$path =~ s!\A(/[^/]+)/!/! or last; $path_pfx .= $1; } } elsif (@v1) { while (!defined($m->{$$path}) && $$path =~ s!\A(/[^/]+)/!/!) { $path_pfx .= $1; } } ($path_pfx, $n, $ret); } sub clone_all { my ($self, $m) = @_; my $todo = delete $self->{todo}; my $nodep = delete $todo->{''}; # do not download unwanted deps my $any_want = delete $self->{any_want}; my @unwanted = grep { !$any_want->{$_} } keys %$todo; my @nodep = delete(@$todo{@unwanted}); push(@$nodep, @$_) for @nodep; # handle no-dependency repos, first for (@$nodep) { clone_v1($_, 1); return if !keep_going($self); } # resolve references, deepest, first: while (scalar keys %$todo) { for my $x (keys %$todo) { my ($nr, $nxt); # resolve multi-level references while ($m && defined($nxt = $m->{$x}->{reference})) { exists($todo->{$nxt}) or last; die < 1000; E: dependency loop detected (`$x' => `$nxt') EOM $x = $nxt; } my $y = delete $todo->{$x} // next; # already done for (@$y) { clone_v1($_, 1); return if !keep_going($self); } last; # restart %$todo iteration } } do_reap($self, 1); # finish all fingerprint checks fgrp_fetch_all($self); do_reap($self, 1); } sub dump_manifest ($$) { my ($m, $ft) = @_; # write the smaller manifest if epochs were skipped so # users won't have to delete manifest if they +w an # epoch they no longer want to skip my $json = PublicInbox::Config->json->encode($m); my $mtime = (stat($ft))[9]; seek($ft, SEEK_SET, 0) or die "seek($ft): $!"; truncate($ft, 0) or die "truncate($ft): $!"; gzip(\$json => $ft) or die "gzip($ft): $GzipError"; $ft->flush or die "flush($ft): $!"; utime($mtime, $mtime, "$ft") or die "utime(..., $ft): $!"; } # FIXME: this gets confused by single inbox instance w/ global manifest.js.gz sub try_manifest { my ($self) = @_; my $uri = URI->new($self->{src}); my $lei = $self->{lei}; my $curl = $self->{curl} //= PublicInbox::LeiCurl->new($lei) or return; $self->{-torsocks} //= $curl->torsocks($lei, $uri) or return; my $path = $uri->path; chop($path) eq '/' or die "BUG: $uri not canonicalized"; $uri->path($path . '/manifest.js.gz'); my $ft = File::Temp->new(TEMPLATE => '.manifest-XXXX', UNLINK => 1, TMPDIR => 1, SUFFIX => '.tmp'); my $cmd = $curl->for_uri($lei, $uri, qw(-f -R -o), $ft->filename); my %opt = map { $_ => $lei->{$_} } (0..2); my $cerr = run_reap($lei, $cmd, \%opt); if ($cerr) { return try_scrape($self) if ($cerr >> 8) == 22; # 404 missing return $lei->child_error($cerr, "@$cmd failed"); } my $m = eval { decode_manifest($ft, $ft, $uri) }; if ($@) { warn $@; return try_scrape($self); } local $self->{-local_manifest} = load_current_manifest($self); my ($path_pfx, $n, $multi) = multi_inbox($self, \$path, $m); return $lei->child_error(1, $multi) if !ref($multi); my $v2 = delete $multi->{v2}; local $self->{todo} = {}; local $self->{fgrp_todo} = {}; # { objstore_dir => [fgrp, ...] } if ($v2) { for my $name (sort keys %$v2) { my $epochs = delete $v2->{$name}; my %v2_epochs = map { $uri->path($n > 1 ? $path_pfx.$path.$_ : $path_pfx.$_); my ($e) = ("$uri" =~ m!/([0-9]+)\.git\z!); $e // die "no [0-9]+\.git in `$uri'"; $e => [ $uri->clone, $_ ]; } @$epochs; ("$uri" =~ m!\A(.+/)git/[0-9]+\.git\z!) or die "BUG: `$uri' !~ m!/git/[0-9]+.git!"; local $self->{cur_src} = $1; local $self->{cur_dst} = $self->{dst}; if ($n > 1 && $uri->path =~ m!\A\Q$path_pfx$path\E/(.+)/ git/[0-9]+\.git\z!x) { $self->{cur_dst} .= "/$1"; } index($self->{cur_dst}, "\n") >= 0 and die <{cur_dst}' must not contain newline EOM clone_v2_prep($self, \%v2_epochs, $m); return if !keep_going($self); } } if (my $v1 = delete $multi->{v1}) { my $p = $path_pfx.$path; chop($p) if substr($p, -1, 1) eq '/'; $uri->path($p); for my $name (@$v1) { my $task = bless { %$self }, __PACKAGE__; $task->{-ent} = $m->{$name} // die("BUG: no `$name' in manifest"); $task->{cur_src} = "$uri"; $task->{cur_dst} = $task->{dst}; $task->{-key} = $name; if ($n > 1) { $task->{cur_dst} .= $name; $task->{cur_src} .= $name; } index($task->{cur_dst}, "\n") >= 0 and die <{cur_dst}' must not contain newline EOM $task->{cur_src} .= '/'; my $dep = $task->{-ent}->{reference} // ''; push @{$self->{todo}->{$dep}}, $task; # for clone_all $self->{any_want}->{$name} = 1; } } delete local $lei->{opt}->{epoch} if defined($v2); clone_all($self, $m); return if $self->{dry_run} || !keep_going($self); # set by clone_v2_prep/-I/--exclude dump_manifest($m => $ft) if delete $self->{-culled_manifest}; ft_rename($ft, "$self->{dst}/manifest.js.gz", 0666); open my $x, '>', "$self->{dst}/mirror.done"; # for _wq_done_wait } sub start_clone_url { my ($self) = @_; return try_manifest($self) if $self->{src} =~ m!\Ahttps?://!; die "TODO: non-HTTP/HTTPS clone of $self->{src} not supported, yet"; } sub do_mirror { # via wq_io_do or public-inbox-clone my ($self) = @_; my $lei = $self->{lei}; $self->{dry_run} = 1 if $lei->{opt}->{'dry-run'}; umask($lei->{client_umask}) if defined $lei->{client_umask}; eval { my $ic = $lei->{opt}->{'inbox-config'} //= 'always'; $ic =~ /\A(?:v1|v2|always|never)\z/s or die <<""; --inbox-config must be one of `always', `v2', `v1', or `never' # we support --objstore= and --manifest= with '' (empty string) for my $default (qw(objstore manifest.js.gz)) { my ($k) = (split(/\./, $default))[0]; my $v = $lei->{opt}->{$k} // next; $v = $default if $v eq ''; $v = "$self->{dst}/$v" if $v !~ m!\A/!; $self->{"-$k"} = $v; } local $LIVE = {}; my $iv = $lei->{opt}->{'inbox-version'} // return start_clone_url($self); return clone_v1($self) if $iv == 1; die "bad --inbox-version=$iv\n" if $iv != 2; die <{src} !~ m!://!; cloning local v2 inboxes not supported EOM try_scrape($self, 1); }; $lei->fail($@) if $@; } sub start { my ($cls, $lei, $src, $dst) = @_; my $self = bless { src => $src, dst => $dst }, $cls; $lei->request_umask; my ($op_c, $ops) = $lei->workers_start($self, 1); $lei->{wq1} = $self; $self->wq_io_do('do_mirror', []); $self->wq_close; $lei->wait_wq_events($op_c, $ops); } sub ipc_atfork_child { my ($self) = @_; $self->{lei}->_lei_atfork_child; $self->SUPER::ipc_atfork_child; } sub write_makefile { my ($dir, $ibx_ver) = @_; my $f = "$dir/Makefile"; if (sysopen my $fh, $f, O_CREAT|O_EXCL|O_WRONLY) { print $fh <