Detect single value advanced config/secret syntax

Allow the use of the advanced source=x syntax for config and secret values when there is no comma

Before this change the following would fail with config not found:
	docker service create --name hello1 --config source=myconfig nginx:alpine
And the following would fail with secret not found:
	docker service create --name hello2 --secret source=mysecret nginx:alpine

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

opts/config.go

@@ -32,7 +32,7 @@ func (o *ConfigOpt) Set(value string) error {
 	}
 
 	// support a simple syntax of --config foo
-	if len(fields) == 1 {
+	if len(fields) == 1 && !strings.Contains(fields[0], "=") {
 		options.File.Name = fields[0]
 		options.ConfigName = fields[0]
 		o.values = append(o.values, options)

opts/config_test.go

@@ -0,0 +1,92 @@
+package opts
+
+import (
+	"os"
+	"testing"
+
+	"gotest.tools/assert"
+	is "gotest.tools/assert/cmp"
+)
+
+func TestConfigOptionsSimple(t *testing.T) {
+	var opt ConfigOpt
+
+	testCase := "app-config"
+	assert.NilError(t, opt.Set(testCase))
+
+	reqs := opt.Value()
+	assert.Assert(t, is.Len(reqs, 1))
+	req := reqs[0]
+	assert.Check(t, is.Equal("app-config", req.ConfigName))
+	assert.Check(t, is.Equal("app-config", req.File.Name))
+	assert.Check(t, is.Equal("0", req.File.UID))
+	assert.Check(t, is.Equal("0", req.File.GID))
+}
+
+func TestConfigOptionsSource(t *testing.T) {
+	var opt ConfigOpt
+
+	testCase := "source=foo"
+	assert.NilError(t, opt.Set(testCase))
+
+	reqs := opt.Value()
+	assert.Assert(t, is.Len(reqs, 1))
+	req := reqs[0]
+	assert.Check(t, is.Equal("foo", req.ConfigName))
+}
+
+func TestConfigOptionsSourceTarget(t *testing.T) {
+	var opt ConfigOpt
+
+	testCase := "source=foo,target=testing"
+	assert.NilError(t, opt.Set(testCase))
+
+	reqs := opt.Value()
+	assert.Assert(t, is.Len(reqs, 1))
+	req := reqs[0]
+	assert.Check(t, is.Equal("foo", req.ConfigName))
+	assert.Check(t, is.Equal("testing", req.File.Name))
+}
+
+func TestConfigOptionsShorthand(t *testing.T) {
+	var opt ConfigOpt
+
+	testCase := "src=foo,target=testing"
+	assert.NilError(t, opt.Set(testCase))
+
+	reqs := opt.Value()
+	assert.Assert(t, is.Len(reqs, 1))
+	req := reqs[0]
+	assert.Check(t, is.Equal("foo", req.ConfigName))
+}
+
+func TestConfigOptionsCustomUidGid(t *testing.T) {
+	var opt ConfigOpt
+
+	testCase := "source=foo,target=testing,uid=1000,gid=1001"
+	assert.NilError(t, opt.Set(testCase))
+
+	reqs := opt.Value()
+	assert.Assert(t, is.Len(reqs, 1))
+	req := reqs[0]
+	assert.Check(t, is.Equal("foo", req.ConfigName))
+	assert.Check(t, is.Equal("testing", req.File.Name))
+	assert.Check(t, is.Equal("1000", req.File.UID))
+	assert.Check(t, is.Equal("1001", req.File.GID))
+}
+
+func TestConfigOptionsCustomMode(t *testing.T) {
+	var opt ConfigOpt
+
+	testCase := "source=foo,target=testing,uid=1000,gid=1001,mode=0444"
+	assert.NilError(t, opt.Set(testCase))
+
+	reqs := opt.Value()
+	assert.Assert(t, is.Len(reqs, 1))
+	req := reqs[0]
+	assert.Check(t, is.Equal("foo", req.ConfigName))
+	assert.Check(t, is.Equal("testing", req.File.Name))
+	assert.Check(t, is.Equal("1000", req.File.UID))
+	assert.Check(t, is.Equal("1001", req.File.GID))
+	assert.Check(t, is.Equal(os.FileMode(0444), req.File.Mode))
+}

opts/secret.go

@@ -32,7 +32,7 @@ func (o *SecretOpt) Set(value string) error {
 	}
 
 	// support a simple syntax of --secret foo
-	if len(fields) == 1 {
+	if len(fields) == 1 && !strings.Contains(fields[0], "=") {
 		options.File.Name = fields[0]
 		options.SecretName = fields[0]
 		o.values = append(o.values, options)

opts/secret_test.go

@@ -23,6 +23,18 @@ func TestSecretOptionsSimple(t *testing.T) {
 	assert.Check(t, is.Equal("0", req.File.GID))
 }
 
+func TestSecretOptionsSource(t *testing.T) {
+	var opt SecretOpt
+
+	testCase := "source=foo"
+	assert.NilError(t, opt.Set(testCase))
+
+	reqs := opt.Value()
+	assert.Assert(t, is.Len(reqs, 1))
+	req := reqs[0]
+	assert.Check(t, is.Equal("foo", req.SecretName))
+}
+
 func TestSecretOptionsSourceTarget(t *testing.T) {
 	var opt SecretOpt