make cgiurl output deterministic

IkiWiki::cgiurl() currently produces non-deterministic output, because
the params hash can be sorted different ways.

Sorting keys to params before crafting the string should make the
output deterministic.

diff --git a/IkiWiki.pm b/IkiWiki.pm
index bb36b0885e8c43ff0b913c850935d18d7cf81529..a70773506a7468bf6289d51d195845f9e0d3895d 100644 (file)
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -1217,7 +1217,7 @@ sub cgiurl (@) {
        }
 
        return $cgiurl."?".
-               join("&", map $_."=".uri_escape_utf8($params{$_}), keys %params);
+               join("&", map $_."=".uri_escape_utf8($params{$_}), sort(keys %params));
 }
 
 sub cgiurl_abs (@) {