use PublicInbox::Spawn qw(popen_rd spawn);
use PublicInbox::Tmpfile;
use IO::Poll qw(POLLIN);
-use Carp qw(croak);
+use Carp qw(croak carp);
use Digest::SHA ();
use PublicInbox::DS qw(dwaitpid);
our @EXPORT_OK = qw(git_unquote git_quote);
our $PIPE_BUFSIZ = 65536; # Linux default
our $in_cleanup;
our $RDTIMEO = 60_000; # milliseconds
+our $async_warn; # true in read-only daemons
use constant MAX_INFLIGHT => (POSIX::PIPE_BUF * 3) /
65; # SHA-256 hex size + "\n" in preparation for git using non-SHA1
sub new {
my ($class, $git_dir) = @_;
+ $git_dir =~ tr!/!/!s;
+ $git_dir =~ s!/*\z!!s;
# may contain {-tmp} field for File::Temp::Dir
bless { git_dir => $git_dir, alt_st => '', -git_path => {} }, $class
}
}
return;
}
- my ($out_r, $out_w);
- pipe($out_r, $out_w) or $self->fail("pipe failed: $!");
- my @cmd = (qw(git), "--git-dir=$self->{git_dir}",
+ pipe(my ($out_r, $out_w)) or $self->fail("pipe failed: $!");
+ my $rdr = { 0 => $out_r, pgid => 0 };
+ my $gd = $self->{git_dir};
+ if ($gd =~ s!/([^/]+/[^/]+)\z!/!) {
+ $rdr->{-C} = $gd;
+ $gd = $1;
+ }
+ my @cmd = (qw(git), "--git-dir=$gd",
qw(-c core.abbrev=40 cat-file), $batch);
- my $redir = { 0 => $out_r };
if ($err) {
my $id = "git.$self->{git_dir}$batch.err";
my $fh = tmpfile($id) or $self->fail("tmpfile($id): $!");
$self->{$err} = $fh;
- $redir->{2} = $fh;
+ $rdr->{2} = $fh;
}
- my ($in_r, $p) = popen_rd(\@cmd, undef, $redir);
+ my ($in_r, $p) = popen_rd(\@cmd, undef, $rdr);
$self->{$pid} = $p;
$self->{"$pid.owner"} = $$;
$out_w->autoflush(1);
return; # unrecoverable error
}
}
- \substr($$rbuf, 0, $len, '');
+ my $no_pad = substr($$rbuf, 0, $len, '');
+ \$no_pad;
}
sub my_readline ($$) {
}
}
-sub cat_async_retry ($$$$$) {
- my ($self, $inflight, $req, $cb, $arg) = @_;
+sub cat_async_retry ($$) {
+ my ($self, $inflight) = @_;
# {inflight} may be non-existent, but if it isn't we delete it
# here to prevent cleanup() from waiting:
$self->{inflight} = $inflight;
batch_prepare($self);
- my $buf = "$req\n";
+ my $buf = '';
for (my $i = 0; $i < @$inflight; $i += 3) {
$buf .= "$inflight->[$i]\n";
}
print { $self->{out} } $buf or $self->fail("write error: $!");
- unshift(@$inflight, \$req, $cb, $arg); # \$ref to indicate retried
+ my $req = shift @$inflight;
+ unshift(@$inflight, \$req); # \$ref to indicate retried
cat_async_step($self, $inflight); # take one step
}
sub cat_async_step ($$) {
my ($self, $inflight) = @_;
die 'BUG: inflight empty or odd' if scalar(@$inflight) < 3;
- my ($req, $cb, $arg) = splice(@$inflight, 0, 3);
- my $rbuf = delete($self->{cat_rbuf}) // \(my $new = '');
+ my ($req, $cb, $arg) = @$inflight[0, 1, 2];
+ my $rbuf = delete($self->{rbuf}) // \(my $new = '');
my ($bref, $oid, $type, $size);
my $head = my_readline($self->{in}, $rbuf);
# ->fail may be called via Gcf2Client.pm
# ref($req) indicates it's already been retried
# -gcf2 retries internally, so it never hits this path:
if (!ref($req) && !$in_cleanup && $self->alternates_changed) {
- return cat_async_retry($self, $inflight,
- $req, $cb, $arg);
+ return cat_async_retry($self, $inflight);
}
$type = 'missing';
$oid = ref($req) ? $$req : $req if $oid eq '';
my $err = $! ? " ($!)" : '';
$self->fail("bad result from async cat-file: $head$err");
}
- $self->{cat_rbuf} = $rbuf if $$rbuf ne '';
+ $self->{rbuf} = $rbuf if $$rbuf ne '';
+ splice(@$inflight, 0, 3); # don't retry $cb on ->fail
eval { $cb->($bref, $oid, $type, $size, $arg) };
- warn "E: $oid: $@\n" if $@;
+ async_err($self, $req, $oid, $@, 'cat') if $@;
}
sub cat_async_wait ($) {
sub check_async_step ($$) {
my ($self, $inflight_c) = @_;
die 'BUG: inflight empty or odd' if scalar(@$inflight_c) < 3;
- my ($req, $cb, $arg) = splice(@$inflight_c, 0, 3);
- my $rbuf = delete($self->{chk_rbuf}) // \(my $new = '');
+ my ($req, $cb, $arg) = @$inflight_c[0, 1, 2];
+ my $rbuf = delete($self->{rbuf_c}) // \(my $new = '');
chomp(my $line = my_readline($self->{in_c}, $rbuf));
my ($hex, $type, $size) = split(/ /, $line);
my $ret = my_read($self->{in_c}, $rbuf, $type + 1);
$self->fail(defined($ret) ? 'read EOF' : "read: $!") if !$ret;
}
- $self->{chk_rbuf} = $rbuf if $$rbuf ne '';
+ $self->{rbuf_c} = $rbuf if $$rbuf ne '';
+ splice(@$inflight_c, 0, 3); # don't retry $cb on ->fail
eval { $cb->($hex, $type, $size, $arg, $self) };
- warn "E: check($req) $@\n" if $@;
+ async_err($self, $req, $hex, $@, 'check') if $@;
}
sub check_async_wait ($) {
dwaitpid($p) if $$ == $self->{"$pid.owner"};
}
-sub cat_async_abort ($) {
+sub async_abort ($) {
my ($self) = @_;
- if (my $inflight = $self->{inflight}) {
- while (@$inflight) {
- my ($req, $cb, $arg) = splice(@$inflight, 0, 3);
- $req =~ s/ .*//; # drop git_dir for Gcf2Client
- eval { $cb->(undef, $req, undef, undef, $arg) };
- warn "E: $req: $@ (in abort)\n" if $@;
+ while (scalar(@{$self->{inflight_c} // []}) ||
+ scalar(@{$self->{inflight} // []})) {
+ for my $c ('', '_c') {
+ my $q = $self->{"inflight$c"};
+ while (@$q) {
+ my ($req, $cb, $arg) = splice(@$q, 0, 3);
+ $req = $$req if ref($req);
+ $req =~ s/ .*//; # drop git_dir for Gcf2Client
+ eval { $cb->(undef, $req, undef, undef, $arg) };
+ warn "E: (in abort) $req: $@" if $@;
+ }
+ delete $self->{"inflight$c"};
+ delete $self->{"rbuf$c"};
}
- delete $self->{cat_rbuf};
- delete $self->{inflight};
}
cleanup($self);
}
sub fail { # may be augmented in subclasses
my ($self, $msg) = @_;
- cat_async_abort($self);
+ async_abort($self);
croak(ref($self) . ' ' . ($self->{git_dir} // '') . ": $msg");
}
+sub async_err ($$$$$) {
+ my ($self, $req, $oid, $err, $action) = @_;
+ $req = $$req if ref($req); # retried
+ my $msg = "E: $action $req ($oid): $err";
+ $async_warn ? carp($msg) : $self->fail($msg);
+}
+
# $git->popen(qw(show f00)); # or
# $git->popen(qw(show f00), { GIT_CONFIG => ... }, { 2 => ... });
sub popen {
my ($self) = @_;
while (scalar(@{$self->{inflight_c} // []}) ||
scalar(@{$self->{inflight} // []})) {
- $self->check_async_wait;
- $self->cat_async_wait;
+ check_async_wait($self);
+ cat_async_wait($self);
}
}
# returns true if there are pending "git cat-file" processes
sub cleanup {
my ($self, $lazy) = @_;
- local $in_cleanup = 1;
return 1 if $lazy && (scalar(@{$self->{inflight_c} // []}) ||
scalar(@{$self->{inflight} // []}));
+ local $in_cleanup = 1;
delete $self->{async_cat};
async_wait_all($self);
delete $self->{inflight};
delete $self->{inflight_c};
- _destroy($self, qw(cat_rbuf in out pid));
- _destroy($self, qw(chk_rbuf in_c out_c pid_c err_c));
- defined($self->{pid}) || defined($self->{pid_c});
+ _destroy($self, qw(rbuf in out pid));
+ _destroy($self, qw(rbuf_c in_c out_c pid_c err_c));
+ undef;
}
# assuming a well-maintained repo, this should be a somewhat
sub DESTROY { cleanup(@_) }
sub local_nick ($) {
- my ($self) = @_;
- my $ret = '???';
# don't show full FS path, basename should be OK:
- if ($self->{git_dir} =~ m!/([^/]+)(?:/*\.git/*)?\z!) {
- $ret = "$1.git";
- }
- wantarray ? ($ret) : $ret;
+ $_[0]->{git_dir} =~ m!/([^/]+?)(?:/*\.git/*)?\z! ? "$1.git" : '???';
}
sub host_prefix_url ($$) {
if (my $urls = $self->{cgit_url}) {
return map { host_prefix_url($env, $_) } @$urls;
}
- local_nick($self);
+ (local_nick($self));
}
sub cat_async_begin {