wip: add specer and footer

pkg/renderer/renderer.go

@@ -17,11 +17,10 @@ type renderer struct {
 }
 
 func (r *renderer) Render(w io.Writer) error {
-	if err := Header(r.s.Header).Render(w); err != nil {
-		return err
-	}
-
-	return nil
+	return Write(w,
+		Header(r.s.Header),
+		Spacer(),
+		Footer(r.s.Footer))
 }
 
 func New(s *spec.Spec) Renderer {
@@ -59,3 +58,22 @@ func (s *stringer) Render(w io.Writer) error {
 func Header(header string) Node {
 	return &stringer{text: header}
 }
+
+func Footer(footer string) Node {
+	return &stringer{text: footer}
+}
+
+func Spacer() Node {
+	return &stringer{text: "\n"}
+}
+
+func Write(out io.Writer, fn ...Renderer) error {
+	for _, f := range fn {
+		err := f.Render(out)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

pkg/spec/spec.go

@@ -38,7 +38,9 @@ type Spec struct {
 	// Description is a short description of the project or repository (optional)
 	Description string `yaml:"description,omitempty"`
 	// Header is the header of the markdown file
-	Header      string         `yaml:"header"`
+	Header string `yaml:"header"`
+	// Footer is the footer of the markdown file
+	Footer      string         `yaml:"footer"`
 	Groups      []Group        `yaml:"groups"`
 	Contents    ContentsConfig `yaml:"contents"`
 	EntryConfig EntryConfig    `yaml:"entry"`