zones: add initial m/ scanner

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/zones/scan.go

@@ -0,0 +1,51 @@
+package zones
+
+import (
+	"io/fs"
+)
+
+func (m *Zones) scan() error {
+	// each directory is a zone
+	entries, err := fs.ReadDir(m.dir, ".")
+	if err != nil {
+		return err
+	}
+
+	for _, e := range entries {
+		if e.IsDir() {
+			z := &Zone{
+				zones: m,
+				Name:  e.Name(),
+			}
+
+			if err := z.scan(); err != nil {
+				return err
+			}
+
+			m.Zones = append(m.Zones, z)
+		}
+	}
+
+	return nil
+}
+
+func (z *Zone) scan() error {
+	// each directory is a machine
+	entries, err := fs.ReadDir(z.zones.dir, z.Name)
+	if err != nil {
+		return err
+	}
+
+	for _, e := range entries {
+		if e.IsDir() {
+			m := &Machine{
+				zone: z,
+				Name: e.Name(),
+			}
+
+			z.Machines = append(z.Machines, m)
+		}
+	}
+
+	return nil
+}