+sub _add_non_http_urls ($$) {
+ my ($ctx, $txt) = @_;
+ $ctx->{ibx}->can('nntp_url') or return; # TODO extindex can have IMAP
+ my $urls = $ctx->{ibx}->imap_url($ctx);
+ if (@$urls) {
+ $$txt .= "\nIMAP subfolder(s) are available under:";
+ $$txt .= "\n " . join("\n ", @$urls);
+ $$txt .= <<EOM
+
+ # each subfolder (starting with `0') holds 50K messages at most
+EOM
+ }
+ $urls = $ctx->{ibx}->nntp_url($ctx);
+ if (@$urls) {
+ $$txt .= @$urls == 1 ? "\nNewsgroup" : "\nNewsgroups are";
+ $$txt .= ' available over NNTP:';
+ $$txt .= "\n " . join("\n ", @$urls) . "\n";
+ }
+ $urls = $ctx->{ibx}->pop3_url($ctx);
+ if (@$urls) {
+ $urls = join("\n ", @$urls);
+ $$txt .= <<EOM;
+
+POP3 access is available:
+ $urls
+
+The password is: anonymous
+The username is: \$(uuidgen)\@$ctx->{ibx}->{newsgroup}
+where \$(uuidgen) in the output of the `uuidgen' command on your system.
+The UUID in the username functions as a private cookie (don't share it).
+Idle accounts will expire periodically.
+EOM
+ }
+}
+
+sub _add_onion_note ($) {
+ my ($txt) = @_;
+ $$txt =~ m!\b[^:]+://\w+\.onion/!i and $$txt .= <<EOM
+
+note: .onion URLs require Tor: https://www.torproject.org/
+
+EOM
+}
+
+sub _mirror_help ($$) {
+ my ($ctx, $txt) = @_;
+ my $ibx = $ctx->{ibx};
+ my $base_url = $ibx->base_url($ctx->{env});
+ chop $base_url; # no trailing slash for "git clone"
+ my $dir = (split(m!/!, $base_url))[-1];
+ my %seen = ($base_url => 1);
+ my $top_url = $base_url;
+ $top_url =~ s!/[^/]+\z!/!;
+ $$txt .= "public-inbox mirroring instructions\n\n";
+ if ($ibx->can('cloneurl')) { # PublicInbox::Inbox
+ $$txt .=
+ "This public inbox may be cloned and mirrored by anyone:\n";
+ my @urls;
+ my $max = $ibx->max_git_epoch;
+ # TODO: some of these URLs may be too long and we may need to
+ # do something like code_footer() above, but these are local
+ # admin-defined
+ if (defined($max)) { # v2
+ for my $i (0..$max) {
+ # old epochs my be deleted:
+ -d "$ibx->{inboxdir}/git/$i.git" or next;
+ my $url = "$base_url/$i";
+ $seen{$url} = 1;
+ push @urls, "$url $dir/git/$i.git";
+ }
+ my $nr = scalar(@urls);
+ if ($nr > 1) {
+ chomp($$txt .= <<EOM);
+
+ # this inbox consists of $nr epochs: (no need to clone all of them)
+EOM
+ $urls[0] .= " # oldest";
+ $urls[-1] .= " # newest";
+ }
+ } else { # v1
+ push @urls, $base_url;
+ }
+ # FIXME: epoch splits can be different in other repositories,
+ # use the "cloneurl" file as-is for now:
+ for my $u (@{$ibx->cloneurl}) {
+ next if $seen{$u}++;
+ push @urls, $u;
+ }
+ $$txt .= "\n";
+ $$txt .= join('', map { " git clone --mirror $_\n" } @urls);
+ my $addrs = $ibx->{address} // 'inbox@example.com';
+ my $ng = $ibx->{newsgroup} // '';
+ substr($ng, 0, 0, ' --ng ') if $ng;
+ $addrs = join(' ', @$addrs) if ref($addrs) eq 'ARRAY';
+ my $v = defined $max ? '-V2' : '-V1';
+ $$txt .= <<EOF;
+
+ # If you have public-inbox 1.1+ installed, you may
+ # initialize and index your mirror using the following commands:
+ public-inbox-init $v$ng \\
+ $ibx->{name} ./$dir $base_url \\
+ $addrs
+ public-inbox-index ./$dir