treewide: update read_all to avoid eof|close checks

read_all can be expanded to support FIFOs/pipes/sockets where
read-until-EOF behavior is desired.  We can also rely on
wantarray to support splitting on EOL markers, but it's
hard-coded to support only `$/ eq "\n"' since (AFAIK)
it's the only way we use the wantarray form `readline'.

1 files changed, 1 insertions, 2 deletions

diff --git a/lib/PublicInbox/LeiToMail.pm b/lib/PublicInbox/LeiToMail.pm
index 0d2f586a..2928be45 100644
--- a/lib/PublicInbox/LeiToMail.pm
+++ b/lib/PublicInbox/LeiToMail.pm
@@ -687,8 +687,7 @@ sub _pre_augment_v2 {
         my $d = "$lei->{ale}->{git}->{git_dir}/objects";
         open my $fh, '+>>', my $f = "$dir/git/0.git/objects/info/alternates";
         seek($fh, 0, SEEK_SET); # Perl did SEEK_END when it saw '>>'
-        my $seen = grep(/\A\Q$d\E\n/, <$fh>);
-        eof($fh) or die "not at `$f' EOF ($!)"; # $! was set by readline
+        my $seen = grep /\A\Q$d\E\n/, PublicInbox::IO::read_all $fh;
         print $fh "$d\n" if !$seen;
         close $fh;
 }