Default config/secret target to source name

When using advanced syntax for setting config and secret values, default
the target value to the source value when the user does not specify a
target.

Signed-off-by: Nick Adcock <nick.adcock@docker.com>

opts/config.go

@@ -72,6 +72,9 @@ func (o *ConfigOpt) Set(value string) error {
 	if options.ConfigName == "" {
 		return fmt.Errorf("source is required")
 	}
+	if options.File.Name == "" {
+		options.File.Name = options.ConfigName
+	}
 
 	o.values = append(o.values, options)
 	return nil

opts/config_test.go

@@ -33,6 +33,7 @@ func TestConfigOptionsSource(t *testing.T) {
 	assert.Assert(t, is.Len(reqs, 1))
 	req := reqs[0]
 	assert.Check(t, is.Equal("foo", req.ConfigName))
+	assert.Check(t, is.Equal("foo", req.File.Name))
 }
 
 func TestConfigOptionsSourceTarget(t *testing.T) {

opts/secret.go

@@ -72,6 +72,9 @@ func (o *SecretOpt) Set(value string) error {
 	if options.SecretName == "" {
 		return fmt.Errorf("source is required")
 	}
+	if options.File.Name == "" {
+		options.File.Name = options.SecretName
+	}
 
 	o.values = append(o.values, options)
 	return nil

opts/secret_test.go

@@ -33,6 +33,7 @@ func TestSecretOptionsSource(t *testing.T) {
 	assert.Assert(t, is.Len(reqs, 1))
 	req := reqs[0]
 	assert.Check(t, is.Equal("foo", req.SecretName))
+	assert.Check(t, is.Equal("foo", req.File.Name))
 }
 
 func TestSecretOptionsSourceTarget(t *testing.T) {