bump libcompose (avoid panics on non-string leaf values in certain data types)

vendor/github.com/docker/libcompose/project/types_yaml.go

@@ -18,13 +18,25 @@ func (s Stringorslice) MarshalYAML() (tag string, value interface{}, err error)
 	return "", s.parts, nil
 }
 
+func toStrings(s []interface{}) ([]string, error) {
+	r := make([]string, len(s))
+	for k, v := range s {
+		if sv, ok := v.(string); ok {
+			r[k] = sv
+		} else {
+			return nil, fmt.Errorf("Cannot unmarshal '%v' of type %T into a string value", v, v)
+		}
+	}
+	return r, nil
+}
+
 // UnmarshalYAML implements the Unmarshaller interface.
 func (s *Stringorslice) UnmarshalYAML(tag string, value interface{}) error {
 	switch value := value.(type) {
 	case []interface{}:
-		parts := make([]string, len(value))
-		for k, v := range value {
-			parts[k] = v.(string)
+		parts, err := toStrings(value)
+		if err != nil {
+			return err
 		}
 		s.parts = parts
 	case string:
@@ -72,9 +84,9 @@ func (s *Command) UnmarshalYAML(tag string, value interface{}) error {
 	var err error
 	switch value := value.(type) {
 	case []interface{}:
-		parts := make([]string, len(value))
-		for k, v := range value {
-			parts[k] = v.(string)
+		parts, err := toStrings(value)
+		if err != nil {
+			return err
 		}
 		s.parts = parts
 	case string:
@@ -116,21 +128,33 @@ func (s *SliceorMap) UnmarshalYAML(tag string, value interface{}) error {
 	case map[interface{}]interface{}:
 		parts := map[string]string{}
 		for k, v := range value {
-			parts[k.(string)] = v.(string)
+			if sk, ok := k.(string); ok {
+				if sv, ok := v.(string); ok {
+					parts[sk] = sv
+				} else {
+					return fmt.Errorf("Cannot unmarshal '%v' of type %T into a string value", v, v)
+				}
+			} else {
+				return fmt.Errorf("Cannot unmarshal '%v' of type %T into a string value", k, k)
+			}
 		}
 		s.parts = parts
 	case []interface{}:
 		parts := map[string]string{}
-		for _, str := range value {
-			str := strings.TrimSpace(str.(string))
-			keyValueSlice := strings.SplitN(str, "=", 2)
+		for _, s := range value {
+			if str, ok := s.(string); ok {
+				str := strings.TrimSpace(str)
+				keyValueSlice := strings.SplitN(str, "=", 2)
 
-			key := keyValueSlice[0]
-			val := ""
-			if len(keyValueSlice) == 2 {
-				val = keyValueSlice[1]
+				key := keyValueSlice[0]
+				val := ""
+				if len(keyValueSlice) == 2 {
+					val = keyValueSlice[1]
+				}
+				parts[key] = val
+			} else {
+				return fmt.Errorf("Cannot unmarshal '%v' of type %T into a string value", s, s)
 			}
-			parts[key] = val
 		}
 		s.parts = parts
 	default:
@@ -163,19 +187,35 @@ func (s MaporEqualSlice) MarshalYAML() (tag string, value interface{}, err error
 	return "", s.parts, nil
 }
 
+func toSepMapParts(value map[interface{}]interface{}, sep string) ([]string, error) {
+	parts := make([]string, 0, len(value))
+	for k, v := range value {
+		if sk, ok := k.(string); ok {
+			if sv, ok := v.(string); ok {
+				parts = append(parts, sk+sep+sv)
+			} else {
+				return nil, fmt.Errorf("Cannot unmarshal '%v' of type %T into a string value", v, v)
+			}
+		} else {
+			return nil, fmt.Errorf("Cannot unmarshal '%v' of type %T into a string value", k, k)
+		}
+	}
+	return parts, nil
+}
+
 // UnmarshalYAML implements the Unmarshaller interface.
 func (s *MaporEqualSlice) UnmarshalYAML(tag string, value interface{}) error {
 	switch value := value.(type) {
 	case []interface{}:
-		parts := make([]string, len(value))
-		for k, v := range value {
-			parts[k] = v.(string)
+		parts, err := toStrings(value)
+		if err != nil {
+			return err
 		}
 		s.parts = parts
 	case map[interface{}]interface{}:
-		parts := make([]string, 0, len(value))
-		for k, v := range value {
-			parts = append(parts, strings.Join([]string{k.(string), v.(string)}, "="))
+		parts, err := toSepMapParts(value, "=")
+		if err != nil {
+			return err
 		}
 		s.parts = parts
 	default:
@@ -209,15 +249,15 @@ func (s MaporColonSlice) MarshalYAML() (tag string, value interface{}, err error
 func (s *MaporColonSlice) UnmarshalYAML(tag string, value interface{}) error {
 	switch value := value.(type) {
 	case []interface{}:
-		parts := make([]string, len(value))
-		for k, v := range value {
-			parts[k] = v.(string)
+		parts, err := toStrings(value)
+		if err != nil {
+			return err
 		}
 		s.parts = parts
 	case map[interface{}]interface{}:
-		parts := make([]string, 0, len(value))
-		for k, v := range value {
-			parts = append(parts, strings.Join([]string{k.(string), v.(string)}, ":"))
+		parts, err := toSepMapParts(value, ":")
+		if err != nil {
+			return err
 		}
 		s.parts = parts
 	default:
@@ -251,15 +291,15 @@ func (s MaporSpaceSlice) MarshalYAML() (tag string, value interface{}, err error
 func (s *MaporSpaceSlice) UnmarshalYAML(tag string, value interface{}) error {
 	switch value := value.(type) {
 	case []interface{}:
-		parts := make([]string, len(value))
-		for k, v := range value {
-			parts[k] = v.(string)
+		parts, err := toStrings(value)
+		if err != nil {
+			return err
 		}
 		s.parts = parts
 	case map[interface{}]interface{}:
-		parts := make([]string, 0, len(value))
-		for k, v := range value {
-			parts = append(parts, strings.Join([]string{k.(string), v.(string)}, " "))
+		parts, err := toSepMapParts(value, " ")
+		if err != nil {
+			return err
 		}
 		s.parts = parts
 	default:

vendor/github.com/docker/libcompose/project/types_yaml_test.go

@@ -5,6 +5,7 @@ import (
 
 	yaml "github.com/cloudfoundry-incubator/candiedyaml"
 
+	"fmt"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -142,21 +143,26 @@ func TestSliceOrMapYaml(t *testing.T) {
 	assert.Equal(t, map[string]string{"bar": "baz", "far": "faz"}, s2.Foos.parts)
 }
 
-var sampleStructSliceorMap = `udav:
-  foos:
-    io.rancher.os.bar: baz
-    io.rancher.os.far: faz
-  bars: []
+var sampleStructSliceorMap = `
+foos:
+  io.rancher.os.bar: baz
+  io.rancher.os.far: true
+bars: []
 `
 
+func TestUnmarshalSliceOrMap(t *testing.T) {
+	s := StructSliceorMap{}
+	err := yaml.Unmarshal([]byte(sampleStructSliceorMap), &s)
+	assert.Equal(t, fmt.Errorf("Cannot unmarshal 'true' of type bool into a string value"), err)
+}
+
 func TestStr2SliceOrMapPtrMap(t *testing.T) {
 	s := map[string]*StructSliceorMap{"udav": {
-		Foos: SliceorMap{map[string]string{"io.rancher.os.bar": "baz", "io.rancher.os.far": "faz"}},
+		Foos: SliceorMap{map[string]string{"io.rancher.os.bar": "baz", "io.rancher.os.far": "true"}},
 		Bars: []string{},
 	}}
 	d, err := yaml.Marshal(&s)
 	assert.Nil(t, err)
-	assert.Equal(t, sampleStructSliceorMap, string(d))
 
 	s2 := map[string]*StructSliceorMap{}
 	yaml.Unmarshal(d, &s2)