feat(parser): support for single-line ifdef/ifndef directives

pkg/parser/document_preprocessing.go

@@ -67,7 +67,13 @@ func preprocess(ctx *ParseContext, source io.Reader) (string, error) {
 				t, _ := e.RawText()
 				b.WriteString(t)
 			case types.ConditionalInclusion:
-				b.enabled = c.push(ctx, e)
+				if content, ok := e.SingleLineContent(); ok {
+					if e.Eval(ctx.attributes.allAttributes()) {
+						b.WriteString(content)
+					}
+				} else {
+					b.enabled = c.push(ctx, e)
+				}
 			case *types.EndOfCondition:
 				b.enabled = c.pop()
 			default:

pkg/parser/document_preprocessing_conditionals_test.go

@@ -106,6 +106,33 @@ cookie content (2)
 closing content`
 				Expect(PreparseDocument(source)).To(Equal(expected))
 			})
+
+			Context("single-line", func() {
+
+				It("with attribute not defined", func() {
+					source := `* some content
+ifdef::cookie[* conditional content]
+* more content`
+					expected := `* some content
+* more content`
+
+					Expect(PreparseDocument(source)).To(Equal(expected))
+				})
+
+				It("with attribute defined", func() {
+					source := `:cookie:
+
+* some content
+ifdef::cookie[* conditional content]
+* more content`
+					expected := `:cookie:
+
+* some content
+* conditional content
+* more content`
+					Expect(PreparseDocument(source)).To(Equal(expected))
+				})
+			})
 		})
 
 		Context("ifndef", func() {
@@ -197,6 +224,33 @@ cookie content (2)
 closing content`
 				Expect(PreparseDocument(source)).To(Equal(expected))
 			})
+
+			Context("single-line", func() {
+
+				It("with attribute not defined", func() {
+					source := `* some content
+ifndef::cookie[* conditional content]
+* more content`
+					expected := `* some content
+* conditional content
+* more content`
+
+					Expect(PreparseDocument(source)).To(Equal(expected))
+				})
+
+				It("with attribute defined", func() {
+					source := `:cookie:
+
+* some content
+ifndef::cookie[* conditional content]
+* more content`
+					expected := `:cookie:
+
+* some content
+* more content`
+					Expect(PreparseDocument(source)).To(Equal(expected))
+				})
+			})
 		})
 
 		Context("ifeval", func() {