Pass version as asciidoc attribute

Author: graemerocher

grails-docs/src/main/groovy/grails/doc/DocPublisher.groovy

@@ -306,6 +306,14 @@ class DocPublisher {
             sourceRepo: sourceRepo,
         ]
 
+        if(engine instanceof AsciiDocEngine) {
+            // pass attributes to asciidoc
+            ((AsciiDocEngine)engine).attributes.putAll(
+                    version: version
+            )
+        }
+
+
         // Build the user guide sections first.
         def template = templateEngine.createTemplate(new File("${docResources}/style/guideItem.html").newReader(encoding))
         def sectionTemplate = templateEngine.createTemplate(new File("${docResources}/style/section.html").newReader(encoding))

grails-docs/src/main/groovy/grails/doc/asciidoc/AsciiDocEngine.groovy

@@ -14,16 +14,18 @@ import org.asciidoctor.Asciidoctor;
 @InheritConstructors
 class AsciiDocEngine extends DocEngine {
     Asciidoctor asciidoctor = create();
-
+    Map attributes = [
+        'imagesdir': '../img',
+        'source-highlighter':'coderay',
+        'icons':'font'
+    ]
     @Override
     String render(String content, RenderContext context) {
         asciidoctor.convert(content,
             new OptionsBuilder()
                 .headerFooter(false)
                 .attributes(
-                    'imagesdir': '../img',
-                    'source-highlighter':'coderay',
-                    'icons':'font'
+                    attributes
                 )
                 .get()
         )