diff options
Diffstat (limited to 'vendor/github.com/hashicorp/terraform/helper/hilmapstructure/hilmapstructure.go')
-rw-r--r-- | vendor/github.com/hashicorp/terraform/helper/hilmapstructure/hilmapstructure.go | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/vendor/github.com/hashicorp/terraform/helper/hilmapstructure/hilmapstructure.go b/vendor/github.com/hashicorp/terraform/helper/hilmapstructure/hilmapstructure.go new file mode 100644 index 00000000..67be1df1 --- /dev/null +++ b/vendor/github.com/hashicorp/terraform/helper/hilmapstructure/hilmapstructure.go @@ -0,0 +1,41 @@ +package hilmapstructure + +import ( + "fmt" + "reflect" + + "github.com/mitchellh/mapstructure" +) + +var hilMapstructureDecodeHookEmptySlice []interface{} +var hilMapstructureDecodeHookStringSlice []string +var hilMapstructureDecodeHookEmptyMap map[string]interface{} + +// WeakDecode behaves in the same way as mapstructure.WeakDecode but has a +// DecodeHook which defeats the backward compatibility mode of mapstructure +// which WeakDecodes []interface{}{} into an empty map[string]interface{}. This +// allows us to use WeakDecode (desirable), but not fail on empty lists. +func WeakDecode(m interface{}, rawVal interface{}) error { + config := &mapstructure.DecoderConfig{ + DecodeHook: func(source reflect.Type, target reflect.Type, val interface{}) (interface{}, error) { + sliceType := reflect.TypeOf(hilMapstructureDecodeHookEmptySlice) + stringSliceType := reflect.TypeOf(hilMapstructureDecodeHookStringSlice) + mapType := reflect.TypeOf(hilMapstructureDecodeHookEmptyMap) + + if (source == sliceType || source == stringSliceType) && target == mapType { + return nil, fmt.Errorf("Cannot convert a []interface{} into a map[string]interface{}") + } + + return val, nil + }, + WeaklyTypedInput: true, + Result: rawVal, + } + + decoder, err := mapstructure.NewDecoder(config) + if err != nil { + return err + } + + return decoder.Decode(m) +} |