haiku: if deterministic build is requested, return a hard-coded haiku

IkiWiki/Plugin/haiku.pm

@@ -25,7 +25,13 @@ sub preprocess (@) {
 
 	my $haiku;
 	eval q{use Coy};
-	if ($@ || ! Coy->can("Coy::with_haiku")) {
+	if ($config{deterministic}) {
+		$haiku = "Coy changes often.
+			  For deterministic builds
+			  try this substitute.
+			 ",
+	}
+	elsif ($@ || ! Coy->can("Coy::with_haiku")) {
 		my @canned=(
 			"The lack of a Coy:
 			 No darting, subtle haiku.

debian/changelog

@@ -34,6 +34,8 @@ ikiwiki (3.20150330) UNRELEASED; urgency=medium
   * Sort backlinks deterministically, by falling back to sorting by href
     if the link text is identical
   * Add a $config{deterministic} option and use it for the docwiki
+  * haiku: if deterministic build is requested, return a hard-coded haiku
+  * If deterministic build is requested, return a hard-coded haiku
 
  -- Joey Hess <id@joeyh.name>  Tue, 28 Apr 2015 12:24:08 -0400