$b64 . '@localhost';
}
+sub clean_purge_buffer {
+ my ($oid, $buf) = @_;
+ my $cmt_msg = "purged $oid\n";
+
+ foreach my $i (0..$#$buf) {
+ my $l = $buf->[$i];
+ if ($l =~ /^author .* (\d+ [\+-]?\d+)$/) {
+ $buf->[$i] = "author <> $1\n";
+ } elsif ($l =~ /^data (\d+)/) {
+ $buf->[$i++] = "data " . length($cmt_msg) . "\n";
+ $buf->[$i] = $cmt_msg;
+ last;
+ }
+ }
+}
+
+sub purge_oids {
+ my ($self, $purge) = @_;
+ my $tmp = "refs/heads/purge-".((keys %$purge)[0]);
+ my $old = $self->{'ref'};
+ my $git = $self->{git};
+ my @export = (qw(fast-export --no-data --use-done-feature), $old);
+ my ($rd, $pid) = $git->popen(@export);
+ my ($r, $w) = $self->gfi_start;
+ my @buf;
+ my $npurge = 0;
+ while (<$rd>) {
+ if (/^reset (?:.+)/) {
+ push @buf, "reset $tmp\n";
+ } elsif (/^commit (?:.+)/) {
+ if (@buf) {
+ $w->print(@buf) or wfail;
+ @buf = ();
+ }
+ push @buf, "commit $tmp\n";
+ } elsif (/^data (\d+)/) {
+ # only commit message, so $len is small:
+ my $len = $1; # + 1 for trailing "\n"
+ push @buf, $_;
+ my $n = read($rd, my $buf, $len) or die "read: $!";
+ $len == $n or die "short read ($n < $len)";
+ push @buf, $buf;
+ } elsif (/^M 100644 ([a-f0-9]+) /) {
+ my $oid = $1;
+ if ($purge->{$oid}) {
+ my $lf = <$rd>;
+ if ($lf eq "\n") {
+ my $out = join('', @buf);
+ $out =~ s/^/# /sgm;
+ warn "purge rewriting\n", $out, "\n";
+ clean_purge_buffer($oid, \@buf);
+ $out = join('', @buf);
+ $w->print(@buf, "\n") or wfail;
+ @buf = ();
+ $npurge++;
+ } else {
+ die "expected LF: $lf\n";
+ }
+ } else {
+ push @buf, $_;
+ }
+ } else {
+ push @buf, $_;
+ }
+ }
+ if (@buf) {
+ $w->print(@buf) or wfail;
+ }
+ $w = $r = undef;
+ $self->done;
+ my @git = ('git', "--git-dir=$git->{git_dir}");
+
+ run_die([@git, qw(update-ref), $old, $tmp]) if $npurge;
+
+ run_die([@git, qw(update-ref -d), $tmp]);
+
+ return if $npurge == 0;
+
+ run_die([@git, qw(-c gc.reflogExpire=now gc --prune=all)]);
+ my $err = 0;
+ foreach my $oid (keys %$purge) {
+ my @info = $git->check($oid);
+ if (@info) {
+ warn "$oid not purged\n";
+ $err++;
+ }
+ }
+ die "Failed to purge $err object(s)\n" if $err;
+}
+
1;
__END__
=pod