Support network.name in the compose schema.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

cli/compose/loader/loader.go

@@ -98,7 +98,7 @@ func loadSections(config map[string]interface{}, configDetails types.ConfigDetai
 		{
 			key: "networks",
 			fnc: func(config map[string]interface{}) error {
-				cfg.Networks, err = LoadNetworks(config)
+				cfg.Networks, err = LoadNetworks(config, configDetails.Version)
 				return err
 			},
 		},
@@ -425,17 +425,30 @@ func transformUlimits(data interface{}) (interface{}, error) {
 
 // LoadNetworks produces a NetworkConfig map from a compose file Dict
 // the source Dict is not validated if directly used. Use Load() to enable validation
-func LoadNetworks(source map[string]interface{}) (map[string]types.NetworkConfig, error) {
+func LoadNetworks(source map[string]interface{}, version string) (map[string]types.NetworkConfig, error) {
 	networks := make(map[string]types.NetworkConfig)
 	err := transform(source, &networks)
 	if err != nil {
 		return networks, err
 	}
 	for name, network := range networks {
-		if network.External.External && network.External.Name == "" {
-			network.External.Name = name
-			networks[name] = network
+		if !network.External.External {
+			continue
 		}
+		switch {
+		case network.External.Name != "":
+			if network.Name != "" {
+				return nil, errors.Errorf("network %s: network.external.name and network.name conflict; only use network.name", name)
+			}
+			if versions.GreaterThanOrEqualTo(version, "3.5") {
+				logrus.Warnf("network %s: network.external.name is deprecated in favor of network.name", name)
+			}
+			network.Name = network.External.Name
+			network.External.Name = ""
+		case network.Name == "":
+			network.Name = name
+		}
+		networks[name] = network
 	}
 	return networks, nil
 }

cli/compose/loader/loader_test.go

@@ -636,7 +636,8 @@ networks:
 		},
 		Networks: map[string]types.NetworkConfig{
 			"front": {
-				External:   types.External{External: true, Name: "front"},
+				External:   types.External{External: true},
+				Name:       "front",
 				Internal:   true,
 				Attachable: true,
 			},
@@ -800,7 +801,7 @@ volumes:
 	assert.Contains(t, err.Error(), "external_volume")
 }
 
-func TestInvalidExternalNameAndNameCombination(t *testing.T) {
+func TestLoadVolumeInvalidExternalNameAndNameCombination(t *testing.T) {
 	_, err := loadYAML(`
 version: "3.4"
 volumes:
@@ -1172,17 +1173,13 @@ func TestFullExample(t *testing.T) {
 		},
 
 		"external-network": {
-			External: types.External{
 			Name:     "external-network",
-				External: true,
-			},
+			External: types.External{External: true},
 		},
 
 		"other-external-network": {
-			External: types.External{
 			Name:     "my-cool-network",
-				External: true,
-			},
+			External: types.External{External: true},
 		},
 	}
 
@@ -1516,7 +1513,7 @@ configs:
 	assert.Equal(t, "invalid", actual.Services[0].Isolation)
 }
 
-func TestInvalidSecretExternalNameAndNameCombination(t *testing.T) {
+func TestLoadSecretInvalidExternalNameAndNameCombination(t *testing.T) {
 	_, err := loadYAML(`
 version: "3.5"
 secrets:
@@ -1556,3 +1553,65 @@ func TestLoadSecretsWarnOnDeprecatedExternalNameVersion35(t *testing.T) {
 	assert.Equal(t, expected, secrets)
 	assert.Contains(t, buf.String(), "secret.external.name is deprecated")
 }
+
+func TestLoadNetworksWarnOnDeprecatedExternalNameVersion35(t *testing.T) {
+	buf, cleanup := patchLogrus()
+	defer cleanup()
+
+	source := map[string]interface{}{
+		"foo": map[string]interface{}{
+			"external": map[string]interface{}{
+				"name": "oops",
+			},
+		},
+	}
+	networks, err := LoadNetworks(source, "3.5")
+	require.NoError(t, err)
+	expected := map[string]types.NetworkConfig{
+		"foo": {
+			Name:     "oops",
+			External: types.External{External: true},
+		},
+	}
+	assert.Equal(t, expected, networks)
+	assert.Contains(t, buf.String(), "network.external.name is deprecated")
+
+}
+
+func TestLoadNetworksWarnOnDeprecatedExternalNameVersion34(t *testing.T) {
+	buf, cleanup := patchLogrus()
+	defer cleanup()
+
+	source := map[string]interface{}{
+		"foo": map[string]interface{}{
+			"external": map[string]interface{}{
+				"name": "oops",
+			},
+		},
+	}
+	networks, err := LoadNetworks(source, "3.4")
+	require.NoError(t, err)
+	expected := map[string]types.NetworkConfig{
+		"foo": {
+			Name:     "oops",
+			External: types.External{External: true},
+		},
+	}
+	assert.Equal(t, expected, networks)
+	assert.Equal(t, "", buf.String())
+}
+
+func TestLoadNetworkInvalidExternalNameAndNameCombination(t *testing.T) {
+	_, err := loadYAML(`
+version: "3.5"
+networks:
+  foo:
+    name: user_specified_name
+    external:
+      name:	external_name
+`)
+
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "network.external.name and network.name conflict; only use network.name")
+	assert.Contains(t, err.Error(), "foo")
+}

cli/compose/schema/data/config_schema_v3.5.json

@@ -428,6 +428,7 @@
       "id": "#/definitions/network",
       "type": ["object", "null"],
       "properties": {
+        "name": {"type": "string"},
         "driver": {"type": "string"},
         "driver_opts": {
           "type": "object",

cli/compose/types/types.go

@@ -319,6 +319,7 @@ type UlimitsConfig struct {
 
 // NetworkConfig for a network
 type NetworkConfig struct {
+	Name       string
 	Driver     string
 	DriverOpts map[string]string `mapstructure:"driver_opts"`
 	Ipam       IPAMConfig