# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# Wrapper to "git fetch" remote public-inboxes
package PublicInbox::Fetch;
-use strict;
-use v5.10.1;
+use v5.12;
use parent qw(PublicInbox::IPC);
use URI ();
-use PublicInbox::Spawn qw(popen_rd);
+use PublicInbox::Spawn qw(popen_rd run_die spawn);
use PublicInbox::Admin;
use PublicInbox::LEI;
use PublicInbox::LeiCurl;
use PublicInbox::LeiMirror;
-use IO::Uncompress::Gunzip qw(gunzip $GunzipError);
use File::Temp ();
sub new { bless {}, __PACKAGE__ }
-sub fetch_cmd ($$) {
- my ($lei, $opt) = @_;
- my @cmd = qw(git);
- $opt->{$_} = $lei->{$_} for (0..2);
- # we support "-c $key=$val" for arbitrary git config options
- # e.g.: git -c http.proxy=socks5h://127.0.0.1:9050
- push(@cmd, '-c', $_) for @{$lei->{opt}->{c} // []};
- push @cmd, 'fetch';
- push @cmd, '-q' if $lei->{opt}->{quiet};
- push @cmd, '-v' if $lei->{opt}->{verbose};
- @cmd;
+sub remote_url ($$) {
+ my ($lei, $dir) = @_;
+ my $rn = $lei->{opt}->{'try-remote'} // [ 'origin', '_grokmirror' ];
+ for my $r (@$rn) {
+ my $cmd = [ qw(git config), "remote.$r.url" ];
+ my $fh = popen_rd($cmd, undef, { -C => $dir, 2 => $lei->{2} });
+ my $url = <$fh>;
+ close $fh or next;
+ $url =~ s!/*\n!!s;
+ return $url;
+ }
+ undef
}
-sub remote_url ($$) {
- my ($lei, $dir) = @_; # TODO: support non-"origin"?
- my $cmd = [ qw(git config remote.origin.url) ];
- my $fh = popen_rd($cmd, undef, { -C => $dir, 2 => $lei->{2} });
- my $url = <$fh>;
- close $fh or return;
- $url =~ s!/*\n!!s;
- $url;
+# PSGI mount prefixes and manifest.js.gz prefixes don't always align...
+# TODO: remove, handle multi-inbox fetch
+sub deduce_epochs ($$) {
+ my ($m, $path) = @_;
+ my ($v1_ent, @v2_epochs);
+ my $path_pfx = '';
+ $path =~ s!/+\z!!;
+ do {
+ $v1_ent = $m->{$path};
+ @v2_epochs = grep(m!\A\Q$path\E/git/[0-9]+\.git\z!, keys %$m);
+ } while (!defined($v1_ent) && !@v2_epochs &&
+ $path =~ s!\A(/[^/]+)/!/! and $path_pfx .= $1);
+ ($path_pfx, $v1_ent ? $path : undef, @v2_epochs);
}
sub do_manifest ($$$) {
my ($lei, $dir, $ibx_uri) = @_;
my $muri = URI->new("$ibx_uri/manifest.js.gz");
- my $ft = File::Temp->new(TEMPLATE => 'manifest-XXXX',
- UNLINK => 1, DIR => $dir);
- my $fn = $ft->filename;
- my @opt = (qw(-R -o), $fn);
+ my $ft = File::Temp->new(TEMPLATE => 'm-XXXX',
+ UNLINK => 1, DIR => $dir, SUFFIX => '.tmp');
my $mf = "$dir/manifest.js.gz";
my $m0; # current manifest.js.gz contents
if (open my $fh, '<', $mf) {
$m0 = eval {
PublicInbox::LeiMirror::decode_manifest($fh, $mf, $mf)
};
- $lei->err($@) if $@;
- push @opt, '-z', $mf if defined($m0);
+ warn($@) if $@;
}
- my $curl_cmd = $lei->{curl}->for_uri($lei, $muri, @opt);
- my $opt = {};
+ my ($bn) = ($ft->filename =~ m!/([^/]+)\z!);
+ my $curl_cmd = $lei->{curl}->for_uri($lei, $muri, qw(-R -o), $bn);
+ my $opt = { -C => $dir };
$opt->{$_} = $lei->{$_} for (0..2);
my $cerr = PublicInbox::LeiMirror::run_reap($lei, $curl_cmd, $opt);
if ($cerr) {
- return [ 404 ] if ($cerr >> 8) == 22; # 404 Missing
+ return [ 404, $muri ] if ($cerr >> 8) == 22; # 404 Missing
$lei->child_error($cerr, "@$curl_cmd failed");
return;
}
- return [ 304 ] if !-s $ft; # 304 Not Modified via curl -z
- my $m1 = PublicInbox::LeiMirror::decode_manifest($ft, $fn, $muri);
+ my $m1 = eval {
+ PublicInbox::LeiMirror::decode_manifest($ft, $ft, $muri);
+ } or return [ 404, $muri ];
my $mdiff = { %$m1 };
- # filter out unchanged entries
+ # filter out unchanged entries. We check modified, too, since
+ # fingerprints are SHA-1, so there's a teeny chance they'll collide
while (my ($k, $v0) = each %{$m0 // {}}) {
my $cur = $m1->{$k} // next;
my $f0 = $v0->{fingerprint} // next;
my $t1 = $cur->{modified} // next;
delete($mdiff->{$k}) if $f0 eq $f1 && $t0 == $t1;
}
+ unless (keys %$mdiff) {
+ $lei->child_error(127 << 8) if $lei->{opt}->{'exit-code'};
+ return;
+ }
my (undef, $v1_path, @v2_epochs) =
- PublicInbox::LeiMirror::deduce_epochs($mdiff, $ibx_uri->path);
- [ 200, $v1_path, \@v2_epochs, $muri, $ft, $mf ];
+ deduce_epochs($mdiff, $ibx_uri->path);
+ [ 200, $muri, $v1_path, \@v2_epochs, $ft, $mf, $m1 ];
+}
+
+sub get_fingerprint2 {
+ my ($git_dir) = @_;
+ require PublicInbox::SHA;
+ my $rd = popen_rd([qw(git show-ref)], undef, { -C => $git_dir });
+ PublicInbox::SHA::sha256(do { local $/; <$rd> });
+}
+
+sub writable_dir ($) {
+ my ($dir) = @_;
+ return unless -d $dir && -w _;
+ my @st = stat($dir);
+ $st[2] & 0222; # any writable bits set? (in case of root)
}
-sub do_fetch {
+sub do_fetch { # main entry point
my ($cls, $lei, $cd) = @_;
my $ibx_ver;
$lei->{curl} //= PublicInbox::LeiCurl->new($lei) or return;
my $dir = PublicInbox::Admin::resolve_inboxdir($cd, \$ibx_ver);
- my ($ibx_uri, @git_dir, @epochs);
+ my ($ibx_uri, @git_dir, @epochs, $mg, @new_epoch, $skip);
if ($ibx_ver == 1) {
my $url = remote_url($lei, $dir) //
- die "E: $dir missing remote.origin.url\n";
+ die "E: $dir missing remote.*.url\n";
$ibx_uri = URI->new($url);
} else { # v2:
- opendir my $dh, "$dir/git" or die "opendir $dir/git: $!";
- @epochs = sort { $b <=> $a } map { substr($_, 0, -4) + 0 }
- grep(/\A[0-9]+\.git\z/, readdir($dh));
+ require PublicInbox::MultiGit;
+ $mg = PublicInbox::MultiGit->new($dir, 'all.git', 'git');
+ @epochs = $mg->git_epochs;
my ($git_url, $epoch);
for my $nr (@epochs) { # try newest epoch, first
my $edir = "$dir/git/$nr.git";
+ if (!writable_dir($edir)) {
+ $skip->{$nr} = 1;
+ next;
+ }
+ next if defined $git_url;
if (defined(my $url = remote_url($lei, $edir))) {
$git_url = $url;
$epoch = $nr;
- last;
} else {
- warn "W: $edir missing remote.origin.url\n";
+ warn "W: $edir missing remote.*.url\n";
+ my $pid = spawn([qw(git config -l)], undef,
+ { 1 => $lei->{2}, 2 => $lei->{2} });
+ waitpid($pid, 0);
+ $lei->child_error($?) if $?;
}
}
+ @epochs = grep { !$skip->{$_} } @epochs if $skip;
+ $skip //= {}; # makes code below easier
$git_url or die "Unable to determine git URL\n";
my $inbox_url = $git_url;
$inbox_url =~ s!/git/$epoch(?:\.git)?/?\z!! or
EOM
$ibx_uri = URI->new($inbox_url);
}
+ PublicInbox::LeiMirror::write_makefile($dir, $ibx_ver);
$lei->qerr("# inbox URL: $ibx_uri/");
my $res = do_manifest($lei, $dir, $ibx_uri) or return;
- my ($code, $v1_path, $v2_epochs, $muri, $ft, $mf) = @$res;
- return if $code == 304;
+ my ($code, $muri, $v1_path, $v2_epochs, $ft, $mf, $m1) = @$res;
if ($code == 404) {
# any pre-manifest.js.gz instances running? Just fetch all
# existing ones and unconditionally try cloning the next
- $v2_epochs = [ map {;
- "$dir/git/$_.git";
- } @epochs ];
- push @$v2_epochs, "$dir/git/".($epochs[-1] + 1) if @epochs;
+ $v2_epochs = [ map { "$dir/git/$_.git" } @epochs ];
+ if (@epochs) {
+ my $n = $epochs[-1] + 1;
+ push @$v2_epochs, "$dir/git/$n.git" if !$skip->{$n};
+ }
} else {
$code == 200 or die "BUG unexpected code $code\n";
}
+ my $mculled;
if ($ibx_ver == 2) {
defined($v1_path) and warn <<EOM;
E: got v1 `$v1_path' when expecting v2 epoch(s) in <$muri>, WTF?
EOM
- @git_dir = map { "$dir/git/$_.git" } sort { $a <=> $b }
- map { my ($nr) = (m!/([0-9]+)\.git\z!g) } @$v2_epochs;
+ @git_dir = map { "$dir/git/$_.git" } sort { $a <=> $b } map {
+ my ($nr) = (m!/([0-9]+)\.git\z!g);
+ $skip->{$nr} ? () : $nr;
+ } @$v2_epochs;
+ if ($m1 && scalar keys %$skip) {
+ my $re = join('|', keys %$skip);
+ my @del = grep(m!/git/$re\.git\z!, keys %$m1);
+ delete @$m1{@del};
+ $mculled = 1;
+ }
} else {
$git_dir[0] = $dir;
}
# n.b. this expects all epochs are from the same host
my $torsocks = $lei->{curl}->torsocks($lei, $muri);
+ my $fp2 = $lei->{opt}->{'exit-code'} ? [] : undef;
+ my $xit = 127;
for my $d (@git_dir) {
my $cmd;
my $opt = {}; # for spawn
if (-d $d) {
- $opt->{-C} = $d;
- $cmd = [ @$torsocks, fetch_cmd($lei, $opt) ];
+ $fp2->[0] = get_fingerprint2($d) if $fp2;
+ $cmd = [ @$torsocks, 'git', "--git-dir=$d",
+ PublicInbox::LeiMirror::fetch_args($lei, $opt)];
} else {
my $e_uri = $ibx_uri->clone;
- my ($epath) = ($d =~ m!/(git/[0-9]+\.git)\z!);
+ my ($epath) = ($d =~ m!(/git/[0-9]+\.git)\z!);
defined($epath) or
die "BUG: $d is not an epoch to clone\n";
$e_uri->path($ibx_uri->path.$epath);
$cmd = [ @$torsocks,
PublicInbox::LeiMirror::clone_cmd($lei, $opt),
$$e_uri, $d];
+ push @new_epoch, substr($epath, 5, -4) + 0;
+ $xit = 0;
}
my $cerr = PublicInbox::LeiMirror::run_reap($lei, $cmd, $opt);
# do not bail on clone failure if we didn't have a manifest
$lei->child_error($cerr, "@$cmd failed");
return;
}
+ if ($fp2 && $xit) {
+ $fp2->[1] = get_fingerprint2($d);
+ $xit = 0 if $fp2->[0] ne $fp2->[1];
+ }
}
+ for my $i (@new_epoch) { $mg->epoch_cfg_set($i) }
if ($ft) {
- my $fn = $ft->filename;
- rename($fn, $mf) or die "E: rename($fn, $mf): $!\n";
- $ft->unlink_on_destroy(0);
+ PublicInbox::LeiMirror::dump_manifest($m1 => $ft) if $mculled;
+ PublicInbox::LeiMirror::ft_rename($ft, $mf, 0666);
}
+ $lei->child_error($xit << 8) if $fp2 && $xit;
}
1;