multi_git: hoist out common epoch/alternates handling

IMHO, this greatly improves code sharing and organization
between v2, extindex, and lei/store.  Common git-related
logic for these is lightly-refactored and easier to reason
about.

The impetus for this big change was to ensure inboxes
created+managed by public-inbox-{clone,fetch} could have
alternates and configs setup properly without depending on
SQLite (via V2Writable).  This change does that while
making old code shorter and better factored.

1 files changed, 1 insertions, 1 deletions

diff --git a/script/public-inbox-convert b/script/public-inbox-convert
index fec6b624..01af846a 100755
--- a/script/public-inbox-convert
+++ b/script/public-inbox-convert
@@ -179,7 +179,7 @@ if (my $old_mm = $old->mm) {
         $v2w->idx_init($opt);
         $v2w->{mm}->{dbh}->sqlite_backup_from_file($old_mm);
 
-        my $epoch0 = PublicInbox::Git->new($v2w->git_init(0));
+        my $epoch0 = PublicInbox::Git->new($v2w->{mg}->add_epoch(0));
         chop(my $cmt = $epoch0->qx(qw(rev-parse --verify), $head));
         $v2w->last_epoch_commit(0, $cmt);
 }