[PATCH 3/4] import: unset GIT_CONFIG with `git config --global'

[Eric Wong]

GIT_CONFIG is set by -convert, and user may have it set
for other reasons.  In either case, it conflicts with
any any attempt to use `git config --global` so we have
to unset it.

This fixes t/multi-mid.t under TEST_RUN_MODE=0
---
 lib/PublicInbox/Import.pm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/PublicInbox/Import.pm b/lib/PublicInbox/Import.pm
index 47a529ff..0aff0e9d 100644
--- a/lib/PublicInbox/Import.pm
+++ b/lib/PublicInbox/Import.pm
@@ -21,6 +21,7 @@ use POSIX qw(strftime);
 
 sub default_branch () {
        state $default_branch = do {
+               delete local $ENV{GIT_CONFIG};
                my $r = popen_rd([qw(git config --global init.defaultBranch)]);
                chomp(my $h = <$r> // '');
                $h eq '' ? 'refs/heads/master' : $h;
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