diff options
Diffstat (limited to 'lib/PublicInbox/LeiMirror.pm')
| -rw-r--r-- | lib/PublicInbox/LeiMirror.pm | 101 |
1 files changed, 89 insertions, 12 deletions
diff --git a/lib/PublicInbox/LeiMirror.pm b/lib/PublicInbox/LeiMirror.pm index 6bfa4b6f..53f7dd31 100644 --- a/lib/PublicInbox/LeiMirror.pm +++ b/lib/PublicInbox/LeiMirror.pm @@ -49,8 +49,11 @@ sub try_scrape { # 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_uris = map { $_ => URI->new($_) } @v2_urls; # uniq - return clone_v2($self, [ values %v2_uris ]); + my %v2_epochs = map { + my ($n) = (m!/([0-9]+)\z!); + $n => URI->new($_) + } @v2_urls; # uniq + return clone_v2($self, \%v2_epochs); } # filter out common URLs served by WWW (e.g /$MSGID/T/) @@ -189,6 +192,8 @@ sub clone_v1 { my $lei = $self->{lei}; my $curl = $self->{curl} //= PublicInbox::LeiCurl->new($lei) or return; my $uri = URI->new($self->{src}); + defined($lei->{opt}->{epoch}) and + die "$uri is a v1 inbox, --epoch is not supported\n"; my $pfx = $curl->torsocks($lei, $uri) or return; my $cmd = [ @$pfx, clone_cmd($lei, my $opt = {}), $uri->as_string, $self->{dst} ]; @@ -199,22 +204,89 @@ sub clone_v1 { index_cloned_inbox($self, 1); } -sub clone_v2 { - my ($self, $v2_uris) = @_; +sub parse_epochs ($$) { + my ($opt_epochs, $v2_epochs) = @_; # $epcohs "LOW..HIGH" + $opt_epochs // return; # undef => all epochs + my ($lo, $dotdot, $hi, @extra) = split(/(\.\.)/, $opt_epochs); + undef($lo) if ($lo // '') eq ''; + my $re = qr/\A~?[0-9]+\z/; + if (@extra || (($lo // '0') !~ $re) || + (($hi // '0') !~ $re) || + !(grep(defined, $lo, $hi))) { + die <<EOM; +--epoch=$opt_epochs not in the form of `LOW..HIGH', `LOW..', nor `..HIGH' +EOM + } + my @n = sort { $a <=> $b } keys %$v2_epochs; + for (grep(defined, $lo, $hi)) { + if (/\A[0-9]+\z/) { + $_ > $n[-1] and die +"`$_' exceeds maximum available epoch ($n[-1])\n"; + $_ < $n[0] and die +"`$_' is lower than minimum available epoch ($n[0])\n"; + } elsif (/\A~([0-9]+)/) { + my $off = -$1 - 1; + $n[$off] // die "`$_' is out of range\n"; + $_ = $n[$off]; + } else { die "`$_' not understood\n" } + } + defined($lo) && defined($hi) && $lo > $hi and die +"low value (`$lo') exceeds high (`$hi')\n"; + $lo //= $n[0] if $dotdot; + $hi //= $n[-1] if $dotdot; + $hi //= $lo; + my $want = {}; + for ($lo..$hi) { + if (defined $v2_epochs->{$_}) { + $want->{$_} = 1; + } else { + warn +"# epoch $_ is not available (non-fatal, $lo..$hi)\n"; + } + } + $want +} + +sub init_placeholder ($$) { + my ($src, $edst) = @_; + PublicInbox::Import::init_bare($edst); + my $f = "$edst/config"; + open my $fh, '>>', $f or die "open($f): $!"; + print $fh <<EOM or die "print($f): $!"; +[remote "origin"] + url = $src + fetch = +refs/*:refs/* + mirror = true + +; This git epoch was created read-only and "public-inbox-fetch" +; will not fetch updates for it unless write permission is added. +EOM + close $fh or die "close:($f): $!"; +} + +sub clone_v2 ($$) { + my ($self, $v2_epochs) = @_; my $lei = $self->{lei}; my $curl = $self->{curl} //= PublicInbox::LeiCurl->new($lei) or return; - my $pfx //= $curl->torsocks($lei, $v2_uris->[0]) or return; + my $pfx = $curl->torsocks($lei, (values %$v2_epochs)[0]) or return; my $dst = $self->{dst}; - my @src_edst; - for my $uri (@$v2_uris) { + my $want = parse_epochs($lei->{opt}->{epoch}, $v2_epochs); + my (@src_edst, @read_only); + for my $nr (sort { $a <=> $b } keys %$v2_epochs) { + my $uri = $v2_epochs->{$nr}; my $src = $uri->as_string; my $edst = $dst; $src =~ m!/([0-9]+)(?:\.git)?\z! or die <<""; failed to extract epoch number from $src - my $nr = $1 + 0; + $1 + 0 == $nr or die "BUG: <$uri> miskeyed $1 != $nr"; $edst .= "/git/$nr.git"; - push @src_edst, $src, $edst; + if (!$want || $want->{$nr}) { + push @src_edst, $src, $edst; + } else { # create a placeholder so users only need to chmod +w + init_placeholder($src, $edst); + push @read_only, $edst; + } } my $lk = bless { lock_path => "$dst/inbox.lock" }, 'PublicInbox::Lock'; _try_config($self); @@ -229,6 +301,10 @@ failed to extract epoch number from $src 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 $edst (@read_only) { + my @st = stat($edst) or die "stat($edst): $!"; + chmod($st[2] & 0555, $edst) or die "chmod(a-w, $edst): $!"; + } write_makefile($self->{dst}, 2); undef $on_destroy; # unlock index_cloned_inbox($self, 2); @@ -291,11 +367,12 @@ sub try_manifest { # @v2_epochs # ignoring $v1_path (use --inbox-version=1 to force v1 instead) EOM - @v2_epochs = map { + my %v2_epochs = map { $uri->path($path_pfx.$_); - $uri->clone + my ($n) = ("$uri" =~ m!/([0-9]+)\.git\z!); + $n => $uri->clone } @v2_epochs; - clone_v2($self, \@v2_epochs); + clone_v2($self, \%v2_epochs); } elsif (defined $v1_path) { clone_v1($self); } else { |