From: Eric Wong <e@80x24.org>
Date: Wed, 10 Jan 2024 11:18:55 +0000 (+0000)
Subject: lei_to_mail: show supported mbox formats on error
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=25aa06e05957cba74798884f53aa317a0ccd04b8;p=thirdparty%2Fpublic-inbox.git

lei_to_mail: show supported mbox formats on error

Users may accidentally or unknowingly write `mbox' and not know
we support 4 incompatible mbox variants.
---

diff --git a/lib/PublicInbox/LeiToMail.pm b/lib/PublicInbox/LeiToMail.pm
index de75e99eb..008da52ef 100644
--- a/lib/PublicInbox/LeiToMail.pm
+++ b/lib/PublicInbox/LeiToMail.pm
@@ -407,7 +407,9 @@ sub new {
 		$lei->{opt}->{save} //= \1 if $lei->{cmd} eq 'q';
 	} elsif (substr($fmt, 0, 4) eq 'mbox') {
 		require PublicInbox::MboxReader;
-		$self->can("eml2$fmt") or die "bad mbox format: $fmt\n";
+		$self->can("eml2$fmt") or die <<EOM;
+E: bad mbox format: $fmt (did you mean: mboxrd, mboxo, mboxcl, or mboxcl2?)
+EOM
 		$self->{base_type} = 'mbox';
 		if ($lei->{cmd} eq 'q' &&
 				(($lei->path_to_fd($dst) // -1) < 0) &&