+sub edit_begin {
+ my ($self, $lei) = @_;
+ if (ref($self->{-cfg}->{'lei.q.output'})) {
+ delete $self->{-cfg}->{'lei.q.output'}; # invalid
+ $lei->err(<<EOM);
+$self->{-f} has multiple values of lei.q.output
+please remove redundant ones
+EOM
+ }
+ $lei->{-lss_for_edit} = $self;
+}
+
+sub edit_done {
+ my ($self, $lei) = @_;
+ my $cfg = PublicInbox::Config->git_config_dump($self->{'-f'});
+ my $new_out = $cfg->{'lei.q.output'} // '';
+ return $lei->fail(<<EOM) if ref $new_out;
+$self->{-f} has multiple values of lei.q.output
+please edit again
+EOM
+ return $lei->fail(<<EOM) if $new_out eq '';
+$self->{-f} needs lei.q.output
+please edit again
+EOM
+ my $old_out = $self->{-cfg}->{'lei.q.output'} // '';
+ return if $old_out eq $new_out;
+ my $old_path = $old_out;
+ my $new_path = $new_out;
+ s!$LOCAL_PFX!! for ($old_path, $new_path);
+ my $dir_old = lss_dir_for($lei, \$old_path, 1);
+ my $dir_new = lss_dir_for($lei, \$new_path);
+ return if $dir_new eq $dir_old; # no change, likely
+ return $lei->fail(<<EOM) if -e $dir_new;
+lei.q.output changed from `$old_out' to `$new_out'
+However, $dir_new exists
+EOM
+ # start the conversion asynchronously
+ my $old_sq = PublicInbox::Config::squote_maybe($old_out);
+ my $new_sq = PublicInbox::Config::squote_maybe($new_out);
+ $lei->puts("lei.q.output changed from $old_sq to $new_sq");
+ $lei->qerr("# lei convert $old_sq -o $new_sq");
+ my $v = !$lei->{opt}->{quiet};
+ $lei->{opt} = { output => $new_out, verbose => $v };
+ require PublicInbox::LeiConvert;
+ PublicInbox::LeiConvert::lei_convert($lei, $old_out);
+
+ $lei->fail(<<EOM) if -e $dir_old && !rename($dir_old, $dir_new);
+E: rename($dir_old, $dir_new) error: $!
+EOM
+}
+