+# Copyright (C) all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# "lei add-external" command
+package PublicInbox::LeiAddExternal;
+use strict;
+use v5.10.1;
+
+sub _finish_add_external {
+ my ($lei, $location) = @_;
+ my $new_boost = $lei->{opt}->{boost} // 0;
+ my $key = "external.$location.boost";
+ my $cur_boost = $lei->_lei_cfg(1)->{$key};
+ return if defined($cur_boost) && $cur_boost == $new_boost; # idempotent
+ $lei->_config($key, $new_boost);
+}
+
+sub lei_add_external {
+ my ($lei, $location) = @_;
+ my $mirror = $lei->{opt}->{mirror} // do {
+ my @fail;
+ for my $sw ($lei->index_opt, $lei->curl_opt,
+ qw(no-torsocks torsocks inbox-version)) {
+ my ($f) = (split(/|/, $sw, 2))[0];
+ next unless defined $lei->{opt}->{$f};
+ $f = length($f) == 1 ? "-$f" : "--$f";
+ push @fail, $f;
+ }
+ if (scalar(@fail) == 1) {
+ return $lei->("@fail requires --mirror");
+ } elsif (@fail) {
+ my $last = pop @fail;
+ my $fail = join(', ', @fail);
+ return $lei->("@fail and $last require --mirror");
+ }
+ undef;
+ };
+ $location = $lei->ext_canonicalize($location);
+ if (defined($mirror) && -d $location) {
+ $lei->fail(<<""); # TODO: did you mean "update-external?"
+--mirror destination `$location' already exists
+
+ } elsif (-d $location) {
+ index($location, "\n") >= 0 and
+ return $lei->fail("`\\n' not allowed in `$location'");
+ }
+ if ($location !~ m!\Ahttps?://! && !-d $location) {
+ $mirror // return $lei->fail("$location not a directory");
+ index($location, "\n") >= 0 and
+ return $lei->fail("`\\n' not allowed in `$location'");
+ $mirror = $lei->ext_canonicalize($mirror);
+ require PublicInbox::LeiMirror;
+ PublicInbox::LeiMirror->start($lei, $mirror => $location);
+ } else {
+ _finish_add_external($lei, $location);
+ }
+}
+
+sub _complete_add_external { # for bash, this relies on "compopt -o nospace"
+ my ($lei, @argv) = @_;
+ my $cfg = $lei->_lei_cfg or return ();
+ my $match_cb = $lei->complete_url_prepare(\@argv);
+ require URI;
+ map {
+ my $u = URI->new(substr($_, length('external.')));
+ my ($base) = ($u->path =~ m!((?:/?.*)?/)[^/]+/?\z!);
+ $u->path($base);
+ $match_cb->($u->as_string);
+ } grep(m!\Aexternal\.https?://!, @{$cfg->{-section_order}});
+}
+
+1;