Wiki Links support

render.go

@@ -15,11 +15,18 @@ import (
 	"github.com/yuin/goldmark/renderer/html"
 )
 
-var md = goldmark.New(
-	goldmark.WithExtensions(extension.GFM, extension.Table),
-	goldmark.WithParserOptions(parser.WithAutoHeadingID()),
-	goldmark.WithRendererOptions(html.WithUnsafe()),
-)
+var md goldmark.Markdown
+
+// initMarkdown builds the package-level goldmark instance. Called once from
+// main after the wiki root is known so the wiki-link extension can resolve
+// targets against the filesystem.
+func initMarkdown(root string) {
+	md = goldmark.New(
+		goldmark.WithExtensions(extension.GFM, extension.Table, newWikiLinkExt(root)),
+		goldmark.WithParserOptions(parser.WithAutoHeadingID()),
+		goldmark.WithRendererOptions(html.WithUnsafe()),
+	)
+}
 
 type crumb struct{ Name, URL string }
 type entry struct {
@@ -32,6 +39,7 @@ type pageData struct {
 	Crumbs         []crumb
 	CanEdit        bool
 	EditMode       bool
+	IsRoot         bool
 	SectionIndex   int // -1 = whole page; >=0 = section being edited
 	PostURL        string
 	RawContent     string