git: use "git rev-parse --git-path"

Using git worktrees was causing t/solver_git.t to fail on me.

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/PublicInbox/SolverGit.pm b/lib/PublicInbox/SolverGit.pm
index d7875333..59d2c93c 100644
--- a/lib/PublicInbox/SolverGit.pm
+++ b/lib/PublicInbox/SolverGit.pm
@@ -272,8 +272,9 @@ EOF
 
         my $f = 'objects/info/alternates';
         open $fh, '>', "$git_dir/$f" or die "open: $f: $!";
-        print($fh (map { "$_->{git_dir}/objects\n" } @{$self->{gits}})) or
-                die "print $f: $!";
+        foreach my $git (@{$self->{gits}}) {
+                print $fh $git->git_path('objects'),"\n" or die "print $f: $!";
+        }
         close $fh or die "close: $f: $!";
         my $tmp_git = $self->{tmp_git} = PublicInbox::Git->new($git_dir);
         $tmp_git->{-tmp} = $self->{tmp};