jpictl: introduce jpictl dns show command

to list dns entries

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

pkg/dns/show.go

@@ -0,0 +1,29 @@
+package dns
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"darvaza.org/core"
+)
+
+// Show shows current DNS entries
+func (mgr *Manager) Show(ctx context.Context, names ...string) error {
+	recs, err := mgr.GetRecords(ctx, names...)
+	if err != nil {
+		return core.Wrap(err, "GetRecords")
+	}
+
+	for _, rr := range recs {
+		_, _ = fmt.Printf("%s\t%v\tIN\t%s\t%s\t; %s\n",
+			rr.Name,
+			int(rr.TTL/time.Second),
+			rr.Type,
+			rr.Value,
+			rr.ID)
+	}
+
+	_, _ = fmt.Printf("; %v records\n", len(recs))
+	return nil
+}