lei ls-mail-source: propagate errors to caller

LeiInput already handles exceptions via `die', so just die
rather than using lei->err() to report to stderr without
affecting the exit code.

I noticed this problem while making some changes to our NNTP
implementation.

diff --git a/lib/PublicInbox/LeiLsMailSource.pm b/lib/PublicInbox/LeiLsMailSource.pm
index 65e3b0ff60c34bfad3bc186787e7a6bdbee67b6a..1d75dd5a17097dbc166f5eb4525d8507becd9b7e 100644 (file)
--- a/lib/PublicInbox/LeiLsMailSource.pm
+++ b/lib/PublicInbox/LeiLsMailSource.pm
@@ -1,4 +1,4 @@
-# Copyright (C) 2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # command for listing NNTP groups and IMAP folders,
@@ -21,7 +21,7 @@ sub input_path_url { # overrides LeiInput version
                my $uri = PublicInbox::URIimap->new($url);
                my $sec = $lei->{net}->can('uri_section')->($uri);
                my $mic = $lei->{net}->mic_get($uri) or
-                       return $lei->err("E: $uri");
+                       die "E: <$uri> can't get IMAP client";
                my $l = $mic->folders_hash($uri->path); # server-side filter
                @$l = map { $_->[2] } # undo Schwartzian transform below:
                        sort { $a->[0] cmp $b->[0] || $a->[1] <=> $b->[1] }
@@ -42,9 +42,9 @@ sub input_path_url { # overrides LeiInput version
        } elsif ($url =~ m!\A(?:nntps?|s?news)://!i) {
                my $uri = PublicInbox::URInntps->new($url);
                my $nn = $lei->{net}->nn_get($uri) or
-                       return $lei->err("E: $uri");
+                       die "E: <$uri> can't get NNTP client";
                # $l = name => description
-               my $l = $nn->newsgroups($uri->group) // return $lei->err(<<EOM);
+               my $l = $nn->newsgroups($uri->group) // die <<EOM;
 E: $uri LIST NEWSGROUPS: ${\(git_quote($nn->message))}
 E: login may be required, try adding `-c nntp.debug' to your command
 EOM