First commit

core/setup/root.go

@@ -0,0 +1,32 @@
+package setup
+
+import (
+	"log"
+	"os"
+
+	"github.com/miekg/coredns/middleware"
+)
+
+// Root sets up the root file path of the server.
+func Root(c *Controller) (middleware.Middleware, error) {
+	for c.Next() {
+		if !c.NextArg() {
+			return nil, c.ArgErr()
+		}
+		c.Root = c.Val()
+	}
+
+	// Check if root path exists
+	_, err := os.Stat(c.Root)
+	if err != nil {
+		if os.IsNotExist(err) {
+			// Allow this, because the folder might appear later.
+			// But make sure the user knows!
+			log.Printf("[WARNING] Root path does not exist: %s", c.Root)
+		} else {
+			return nil, c.Errf("Unable to access root path '%s': %v", c.Root, err)
+		}
+	}
+
+	return nil, nil
+}