use POSIX qw(dup2);
require IO::Handle;
use PublicInbox::Spawn qw(spawn popen_rd);
+use base qw(Exporter);
+our @EXPORT_OK = qw(git_unquote git_quote);
+
+my %GIT_ESC = (
+ a => "\a",
+ b => "\b",
+ f => "\f",
+ n => "\n",
+ r => "\r",
+ t => "\t",
+ v => "\013",
+ '"' => '"',
+ '\\' => '\\',
+);
+my %ESC_GIT = map { $GIT_ESC{$_} => $_ } keys %GIT_ESC;
+
+
+# unquote pathnames used by git, see quote.c::unquote_c_style.c in git.git
+sub git_unquote ($) {
+ return $_[0] unless ($_[0] =~ /\A"(.*)"\z/);
+ $_[0] = $1;
+ $_[0] =~ s/\\([\\"abfnrtv])/$GIT_ESC{$1}/g;
+ $_[0] =~ s/\\([0-7]{1,3})/chr(oct($1))/ge;
+ $_[0];
+}
+
+sub git_quote ($) {
+ if ($_[0] =~ s/([\\"\a\b\f\n\r\t\013]|[^[:print:]])/
+ '\\'.($ESC_GIT{$1}||sprintf("%0o",ord($1)))/egs) {
+ return qq{"$_[0]"};
+ }
+ $_[0];
+}
sub new {
my ($class, $git_dir) = @_;
my @st;
$st[7] = $st[10] = 0;
- bless { git_dir => $git_dir, st => \@st }, $class
+ # may contain {-tmp} field for File::Temp::Dir
+ bless { git_dir => $git_dir, st => \@st, -git_path => {} }, $class
+}
+
+sub git_path ($$) {
+ my ($self, $path) = @_;
+ $self->{-git_path}->{$path} ||= do {
+ local $/ = "\n";
+ chomp(my $str = $self->qx(qw(rev-parse --git-path), $path));
+ $str;
+ };
}
sub alternates_changed {
my ($self) = @_;
- my $alt = "$self->{git_dir}/objects/info/alternates";
+ my $alt = git_path($self, 'objects/info/alternates');
my @st = stat($alt) or return 0;
my $old_st = $self->{st};
# 10 - ctime, 7 - size
$self->{st} = \@st;
}
+sub last_check_err {
+ my ($self) = @_;
+ my $fh = $self->{err_c} or return;
+ sysseek($fh, 0, 0) or fail($self, "sysseek failed: $!");
+ defined(sysread($fh, my $buf, -s $fh)) or
+ fail($self, "sysread failed: $!");
+ $buf;
+}
+
sub _bidi_pipe {
- my ($self, $batch, $in, $out, $pid) = @_;
- return if $self->{$pid};
+ my ($self, $batch, $in, $out, $pid, $err) = @_;
+ if ($self->{$pid}) {
+ if (defined $err) { # "err_c"
+ my $fh = $self->{$err};
+ sysseek($fh, 0, 0) or fail($self, "sysseek failed: $!");
+ truncate($fh, 0) or fail($self, "truncate failed: $!");
+ }
+ return;
+ }
my ($in_r, $in_w, $out_r, $out_w);
pipe($in_r, $in_w) or fail($self, "pipe failed: $!");
pipe($out_r, $out_w) or fail($self, "pipe failed: $!");
+ if ($^O eq 'linux') { # 1031: F_SETPIPE_SZ
+ fcntl($out_w, 1031, 4096);
+ fcntl($in_w, 1031, 4096) if $batch eq '--batch-check';
+ }
- my @cmd = ('git', "--git-dir=$self->{git_dir}", qw(cat-file), $batch);
+ my @cmd = (qw(git), "--git-dir=$self->{git_dir}",
+ qw(-c core.abbrev=40 cat-file), $batch);
my $redir = { 0 => fileno($out_r), 1 => fileno($in_w) };
+ if ($err) {
+ open(my $fh, '+>', undef) or fail($self, "open.err failed: $!");
+ $self->{$err} = $fh;
+ $redir->{2} = fileno($fh);
+ }
my $p = spawn(\@cmd, undef, $redir);
defined $p or fail($self, "spawn failed: $!");
$self->{$pid} = $p;
sub check {
my ($self, $obj) = @_;
- $self->_bidi_pipe(qw(--batch-check in_c out_c pid_c));
+ _bidi_pipe($self, qw(--batch-check in_c out_c pid_c err_c));
$self->{out_c}->print($obj, "\n") or fail($self, "write error: $!");
local $/ = "\n";
chomp(my $line = $self->{in_c}->getline);
my ($hex, $type, $size) = split(' ', $line);
- return if $type eq 'missing';
+
+ # Future versions of git.git may show 'ambiguous', but for now,
+ # we must handle 'dangling' below (and maybe some other oddball
+ # stuff):
+ # https://public-inbox.org/git/20190118033845.s2vlrb3wd3m2jfzu@dcvr/T/
+ return if $type eq 'missing' || $type eq 'ambiguous';
+
+ if ($hex eq 'dangling' || $hex eq 'notdir' || $hex eq 'loop') {
+ $size = $type + length("\n");
+ my $r = read($self->{in_c}, my $buf, $size);
+ defined($r) or fail($self, "read failed: $!");
+ return;
+ }
+
($hex, $type, $size);
}
sub _destroy {
- my ($self, $in, $out, $pid) = @_;
+ my ($self, $in, $out, $pid, $expire) = @_;
+ my $rfh = $self->{$in} or return;
+ if (defined $expire) {
+ # at least FreeBSD 11.2 and Linux 4.20 update mtime of the
+ # read end of a pipe when the pipe is written to; dunno
+ # about other OSes.
+ my $mtime = (stat($rfh))[9];
+ return if $mtime > $expire;
+ }
my $p = delete $self->{$pid} or return;
foreach my $f ($in, $out) {
delete $self->{$f};
<$fh>
}
+# returns true if there are pending "git cat-file" processes
sub cleanup {
- my ($self) = @_;
- _destroy($self, qw(in out pid));
- _destroy($self, qw(in_c out_c pid_c));
+ my ($self, $expire) = @_;
+ _destroy($self, qw(in out pid), $expire);
+ _destroy($self, qw(in_c out_c pid_c), $expire);
+ !!($self->{pid} || $self->{pid_c});
}
# assuming a well-maintained repo, this should be a somewhat
sub packed_bytes {
my ($self) = @_;
my $n = 0;
- foreach my $p (glob("$self->{git_dir}/objects/pack/*.pack")) {
+ my $pack_dir = git_path($self, 'objects/pack');
+ foreach my $p (glob("$pack_dir/*.pack")) {
$n += -s $p;
}
$n
sub DESTROY { cleanup(@_) }
+sub local_nick ($) {
+ my ($self) = @_;
+ my $ret = '???';
+ # don't show full FS path, basename should be OK:
+ if ($self->{git_dir} =~ m!/([^/]+)(?:/\.git)?\z!) {
+ $ret = "/path/to/$1";
+ }
+ wantarray ? ($ret) : $ret;
+}
+
+# show the blob URL for cgit/gitweb/whatever
+sub src_blob_url {
+ my ($self, $oid) = @_;
+ # blob_url_format = "https://example.com/foo.git/blob/%s"
+ if (my $bfu = $self->{blob_url_format}) {
+ return map { sprintf($_, $oid) } @$bfu if wantarray;
+ return sprintf($bfu->[0], $oid);
+ }
+ local_nick($self);
+}
+
+sub pub_urls {
+ my ($self) = @_;
+ if (my $urls = $self->{cgit_url}) {
+ return @$urls;
+ }
+ local_nick($self);
+}
+
1;
__END__
=pod