support running container with network id

Signed-off-by: fahed dorgaa <[email protected]>

Author: fahedouch

Diff for: cmd/nerdctl/container_run_network_linux_test.go

@@ -42,13 +42,20 @@ func TestRunInternetConnectivity(t *testing.T) {
 	type testCase struct {
 		args []string
 	}
+	customNetID := base.InspectNetwork(customNet).ID
 	testCases := []testCase{
 		{
 			args: []string{"--net", "bridge"},
 		},
 		{
 			args: []string{"--net", customNet},
 		},
+		{
+			args: []string{"--net", customNetID},
+		},
+		{
+			args: []string{"--net", customNetID[:12]},
+		},
 		{
 			args: []string{"--net", "host"},
 		},

Diff for: pkg/netutil/netutil.go

@@ -165,6 +165,14 @@ func (e *CNIEnv) NetworkMap() (map[string]*NetworkConfig, error) { //nolint:revi
 			log.L.Warnf("duplicate network name %q, %#v will get superseded by %#v", n.Name, original, n)
 		}
 		m[n.Name] = n
+		if n.NerdctlID != nil {
+			id := *n.NerdctlID
+			m[id] = n
+			if len(id) > 12 {
+				id = id[:12]
+				m[id] = n
+			}
+		}
 	}
 	return m, nil
 }