git: signal-safety for pipe writes

I've yet to hit it, but syswrite has chance of returning EINTR
on a blocking pipe.

1 files changed, 3 insertions, 9 deletions

diff --git a/lib/PublicInbox/GitCatFile.pm b/lib/PublicInbox/GitCatFile.pm
index 48ae6734..3fced28d 100644
--- a/lib/PublicInbox/GitCatFile.pm
+++ b/lib/PublicInbox/GitCatFile.pm
@@ -7,6 +7,7 @@ package PublicInbox::GitCatFile;
 use strict;
 use warnings;
 use POSIX qw(dup2);
+require IO::Handle;
 
 sub new {
         my ($class, $git_dir) = @_;
@@ -31,6 +32,7 @@ sub _cat_file_begin {
         }
         close $out_r or die "close failed: $!\n";
         close $in_w or die "close failed: $!\n";
+        $out_w->autoflush(1);
 
         $self->{in} = $in_r;
         $self->{out} = $out_w;
@@ -40,16 +42,8 @@ sub _cat_file_begin {
 sub cat_file {
         my ($self, $object, $sizeref) = @_;
 
-        $object .= "\n";
-        my $len = length($object);
-
         $self->_cat_file_begin;
-        my $written = syswrite($self->{out}, $object);
-        if (!defined $written) {
-                die "pipe write error: $!\n";
-        } elsif ($written != $len) {
-                die "wrote too little to pipe ($written < $len)\n";
-        }
+        print { $self->{out} } $object, "\n" or die "pipe write error: $!\n";
 
         my $in = $self->{in};
         my $head = <$in>;