fix(parser): expose authors and revision in the document attributes

also, expand the attributes so we can substitute the 'author',
'firstname', etc. attributes in the document during the processing

fixes bytesparadise#517

Signed-off-by: Xavier Coulon <[email protected]>

cmd/libasciidoc/root_cmd_test.go

@@ -92,9 +92,12 @@ var _ = Describe("root cmd", func() {
 		// when
 		err := root.Execute()
 		// then
+		GinkgoT().Logf("out: %v", buf.String())
 		Expect(err).ToNot(HaveOccurred())
 		Expect(buf.String()).ToNot(BeEmpty())
-		Expect(buf.String()).To(Equal(`<div class="paragraph">
+		// console output also includes a warning message
+		Expect(buf.String()).To(Equal(`level=warning msg="unable to find attribute 'foo2'"
+<div class="paragraph">
 <p>bar1 and {foo2}</p>
 </div>`))
 	})

libasciidoc.go

@@ -58,7 +58,7 @@ func ConvertToHTML(r io.Reader, output io.Writer, config configuration.Configura
 		return types.Metadata{}, err
 	}
 	rendererCtx := renderer.NewContext(doc, config)
-	// insert tables of contents, preamble and process file inclusions
+	// insert tables of contents and preamble
 	err = renderer.Prerender(rendererCtx)
 	if err != nil {
 		return types.Metadata{}, err