+}
+
+sub confirmation_form {
+ my ($q, $session, $rev) = @_;
+
+ eval q{use CGI::FormBuilder};
+ error($@) if $@;
+ my $f = CGI::FormBuilder->new(
+ name => "revert",
+ header => 0,
+ charset => "utf-8",
+ method => 'POST',
+ javascript => 0,
+ params => $q,
+ action => $config{cgiurl},
+ stylesheet => 1,
+ template => { template('revert.tmpl') },
+ );
+
+ $f->field(name => "sid", type => "hidden", value => $session->id,
+ force => 1);
+ $f->field(name => "do", type => "hidden", value => "revert",
+ force => 1);
+
+ return $f, ["Revert", "Cancel"];
+}
+
+sub sessioncgi ($$) {
+ my ($q, $session) = @_;
+ my $do = $q->param('do');
+ my $rev = $q->param('rev');
+
+ return unless $do eq 'revert' && $rev;
+
+ IkiWiki::rcs_preprevert(cgi => $q, session => $session, rev => $rev);
+
+ my ($form, $buttons) = confirmation_form($q, $session);
+ IkiWiki::decode_form_utf8($form);
+
+ if ($form->submitted eq 'Revert' && $form->validate) {
+ IkiWiki::checksessionexpiry($q, $session, $q->param('sid'));
+ IkiWiki::disable_commit_hook();
+ my $r = IkiWiki::rcs_revert(
+ session => $session,
+ rev => $rev);
+ IkiWiki::enable_commit_hook();
+
+ if ($r) {
+ die "Revert '$rev' failed.";
+ }
+ else {
+ require IkiWiki::Render;
+ IkiWiki::refresh();
+ IkiWiki::saveindex();
+ }
+ }
+ else {
+ $form->title(sprintf(gettext("confirm reversion of %s"), $rev));
+ my $patch_contents = IkiWiki::rcs_showpatch(rev => $rev);
+ $form->tmpl_param(patch_contents => encode_entities($patch_contents));
+ $form->field(name => "rev", type => "hidden", value => $rev, force => 1);
+ IkiWiki::showform($form, $buttons, $session, $q);
+ exit 0;
+ }