[PATCH 74/95] lei_mirror: avoid needless FD passing

[Eric Wong]

Most git processes we invoke don't care about stdin nor stdout,
so don't waste cycles and memory dealing with it.

stderr passing is added `git config --unset-all remotes.fgrptmp'
invocation, though, since that can fail due to I/O errors or OOM.
---
 lib/PublicInbox/LeiMirror.pm | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/PublicInbox/LeiMirror.pm b/lib/PublicInbox/LeiMirror.pm
index 2473c74b..7fcb4ebb 100644
--- a/lib/PublicInbox/LeiMirror.pm
+++ b/lib/PublicInbox/LeiMirror.pm
@@ -300,7 +300,7 @@ sub fgrp_update {
                qw(update-ref --stdin -z) ];
        my $lei = $fgrp->{lei};
        $lei->qerr("# @$cmd");
-       my $opt = { 0 => $r, 1 => $lei->{1}, 2 => $lei->{2} };
+       my $opt = { 0 => $r, 2 => $lei->{2} };
        my $pid = spawn($cmd, undef, $opt);
        close $r or die "close(r): $!";
        for my $ref (keys %dst) {
@@ -332,7 +332,7 @@ sub pack_refs {
        my $cmd = [ 'git', "--git-dir=$git_dir", qw(pack-refs --all --prune) ];
        $self->{lei}->qerr("# @$cmd");
        return if $self->{dry_run};
-       my $opt = { 1 => $self->{lei}->{1}, 2 => $self->{lei}->{2} };
+       my $opt = { 2 => $self->{lei}->{2} };
        $LIVE->{spawn($cmd, undef, $opt)} = [ \&reap_cmd, $self, $cmd ];
 }
 
@@ -344,7 +344,7 @@ sub fgrpv_done {
        pack_refs($first, $first->{-osdir}); # objstore refs always packed
        for my $fgrp (@$fgrpv) {
                my $rn = $fgrp->{-remote};
-               my %opt = map { $_ => $fgrp->{lei}->{$_} } (0..2);
+               my %opt = ( 2 => $fgrp->{lei}->{2} );
 
                my $update_ref = $fgrp->{dry_run} ? undef :
                        PublicInbox::OnDestroy->new($$, \&fgrp_update, $fgrp);
@@ -401,7 +401,7 @@ sub fgrp_fetch_all {
                                $f, '--unset-all', "remotes.$grp"];
                $self->{lei}->qerr("# @$cmd");
                if (!$self->{dry_run}) {
-                       $pid = spawn($cmd);
+                       $pid = spawn($cmd, undef, { 2 => $self->{lei}->{2} });
                        waitpid($pid, 0) // die "waitpid: $!";
                        die "E: @$cmd: \$?=$?" if ($? && ($? >> 8) != 5);
 
@@ -518,7 +518,7 @@ sub resume_fetch {
        my ($self, $uri, $fini) = @_;
        my $dst = $self->{cur_dst} // $self->{dst};
        my @git = ('git', "--git-dir=$dst");
-       my $opt = +{ map { $_ => $self->{lei}->{$_} } (0..2) };
+       my $opt = { 2 => $self->{lei}->{2} };
        my $rn = 'origin'; # configurable?
        for ("url=$uri", "fetch=+refs/*:refs/*", 'mirror=true') {
                my @kv = split(/=/, $_, 2);