total rewrite to interface handling; not complete but it compiles

generate/template.go

@@ -0,0 +1,15 @@
+package generate
+
+import (
+	"path/filepath"
+	"runtime"
+	"text/template"
+)
+
+// TODO: package templates into the binary using one of those asset thingies
+var _, thisFilename, _, _ = runtime.Caller(0)
+var thisDir = filepath.Dir(thisFilename)
+
+func mustTemplate(relFilename string) *template.Template {
+	return template.Must(template.ParseFiles(filepath.Join(thisDir, relFilename)))
+}