From bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87 Mon Sep 17 00:00:00 2001 From: Valentin Rothberg Date: Tue, 8 Jan 2019 14:52:57 +0100 Subject: vendor: update everything * If possible, update each dependency to the latest available version. * Use releases over commit IDs and avoid vendoring branches. Signed-off-by: Valentin Rothberg --- vendor/github.com/imdario/mergo/merge.go | 159 ++++++++++++++++++++++++++++--- 1 file changed, 144 insertions(+), 15 deletions(-) (limited to 'vendor/github.com/imdario/mergo/merge.go') diff --git a/vendor/github.com/imdario/mergo/merge.go b/vendor/github.com/imdario/mergo/merge.go index 11e55b1e2..44f70a89d 100644 --- a/vendor/github.com/imdario/mergo/merge.go +++ b/vendor/github.com/imdario/mergo/merge.go @@ -9,13 +9,38 @@ package mergo import ( + "fmt" "reflect" ) +func hasExportedField(dst reflect.Value) (exported bool) { + for i, n := 0, dst.NumField(); i < n; i++ { + field := dst.Type().Field(i) + if field.Anonymous && dst.Field(i).Kind() == reflect.Struct { + exported = exported || hasExportedField(dst.Field(i)) + } else { + exported = exported || len(field.PkgPath) == 0 + } + } + return +} + +type Config struct { + Overwrite bool + AppendSlice bool + Transformers Transformers +} + +type Transformers interface { + Transformer(reflect.Type) func(dst, src reflect.Value) error +} + // Traverses recursively both values, assigning src's fields values to dst. // The map argument tracks comparisons that have already been seen, which allows // short circuiting on recursive types. -func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, overwrite bool) (err error) { +func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, config *Config) (err error) { + overwrite := config.Overwrite + if !src.IsValid() { return } @@ -32,14 +57,31 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, ov // Remember, remember... visited[h] = &visit{addr, typ, seen} } + + if config.Transformers != nil && !isEmptyValue(dst) { + if fn := config.Transformers.Transformer(dst.Type()); fn != nil { + err = fn(dst, src) + return + } + } + switch dst.Kind() { case reflect.Struct: - for i, n := 0, dst.NumField(); i < n; i++ { - if err = deepMerge(dst.Field(i), src.Field(i), visited, depth+1, overwrite); err != nil { - return + if hasExportedField(dst) { + for i, n := 0, dst.NumField(); i < n; i++ { + if err = deepMerge(dst.Field(i), src.Field(i), visited, depth+1, config); err != nil { + return + } + } + } else { + if dst.CanSet() && !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) { + dst.Set(src) } } case reflect.Map: + if dst.IsNil() && !src.IsNil() { + dst.Set(reflect.MakeMap(dst.Type())) + } for _, key := range src.MapKeys() { srcElement := src.MapIndex(key) if !srcElement.IsValid() { @@ -47,7 +89,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, ov } dstElement := dst.MapIndex(key) switch srcElement.Kind() { - case reflect.Chan, reflect.Func, reflect.Map, reflect.Ptr, reflect.Interface, reflect.Slice: + case reflect.Chan, reflect.Func, reflect.Map, reflect.Interface, reflect.Slice: if srcElement.IsNil() { continue } @@ -62,28 +104,90 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, ov case reflect.Ptr: fallthrough case reflect.Map: - if err = deepMerge(dstElement, srcElement, visited, depth+1, overwrite); err != nil { + srcMapElm := srcElement + dstMapElm := dstElement + if srcMapElm.CanInterface() { + srcMapElm = reflect.ValueOf(srcMapElm.Interface()) + if dstMapElm.IsValid() { + dstMapElm = reflect.ValueOf(dstMapElm.Interface()) + } + } + if err = deepMerge(dstMapElm, srcMapElm, visited, depth+1, config); err != nil { return } + case reflect.Slice: + srcSlice := reflect.ValueOf(srcElement.Interface()) + + var dstSlice reflect.Value + if !dstElement.IsValid() || dstElement.IsNil() { + dstSlice = reflect.MakeSlice(srcSlice.Type(), 0, srcSlice.Len()) + } else { + dstSlice = reflect.ValueOf(dstElement.Interface()) + } + + if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice { + dstSlice = srcSlice + } else if config.AppendSlice { + if srcSlice.Type() != dstSlice.Type() { + return fmt.Errorf("cannot append two slice with different type (%s, %s)", srcSlice.Type(), dstSlice.Type()) + } + dstSlice = reflect.AppendSlice(dstSlice, srcSlice) + } + dst.SetMapIndex(key, dstSlice) } } - if !isEmptyValue(srcElement) && (overwrite || (!dstElement.IsValid() || isEmptyValue(dst))) { + if dstElement.IsValid() && reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Map { + continue + } + + if srcElement.IsValid() && (overwrite || (!dstElement.IsValid() || isEmptyValue(dstElement))) { if dst.IsNil() { dst.Set(reflect.MakeMap(dst.Type())) } dst.SetMapIndex(key, srcElement) } } + case reflect.Slice: + if !dst.CanSet() { + break + } + if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice { + dst.Set(src) + } else if config.AppendSlice { + if src.Type() != dst.Type() { + return fmt.Errorf("cannot append two slice with different type (%s, %s)", src.Type(), dst.Type()) + } + dst.Set(reflect.AppendSlice(dst, src)) + } case reflect.Ptr: fallthrough case reflect.Interface: if src.IsNil() { break - } else if dst.IsNil() { + } + if src.Kind() != reflect.Interface { + if dst.IsNil() || overwrite { + if dst.CanSet() && (overwrite || isEmptyValue(dst)) { + dst.Set(src) + } + } else if src.Kind() == reflect.Ptr { + if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, config); err != nil { + return + } + } else if dst.Elem().Type() == src.Type() { + if err = deepMerge(dst.Elem(), src, visited, depth+1, config); err != nil { + return + } + } else { + return ErrDifferentArgumentsTypes + } + break + } + if dst.IsNil() || overwrite { if dst.CanSet() && (overwrite || isEmptyValue(dst)) { dst.Set(src) } - } else if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, overwrite); err != nil { + } else if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, config); err != nil { return } default: @@ -98,26 +202,51 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, ov // src attributes if they themselves are not empty. dst and src must be valid same-type structs // and dst must be a pointer to struct. // It won't merge unexported (private) fields and will do recursively any exported field. -func Merge(dst, src interface{}) error { - return merge(dst, src, false) +func Merge(dst, src interface{}, opts ...func(*Config)) error { + return merge(dst, src, opts...) } // MergeWithOverwrite will do the same as Merge except that non-empty dst attributes will be overriden by // non-empty src attribute values. -func MergeWithOverwrite(dst, src interface{}) error { - return merge(dst, src, true) +// Deprecated: use Merge(…) with WithOverride +func MergeWithOverwrite(dst, src interface{}, opts ...func(*Config)) error { + return merge(dst, src, append(opts, WithOverride)...) +} + +// WithTransformers adds transformers to merge, allowing to customize the merging of some types. +func WithTransformers(transformers Transformers) func(*Config) { + return func(config *Config) { + config.Transformers = transformers + } +} + +// WithOverride will make merge override non-empty dst attributes with non-empty src attributes values. +func WithOverride(config *Config) { + config.Overwrite = true } -func merge(dst, src interface{}, overwrite bool) error { +// WithAppendSlice will make merge append slices instead of overwriting it +func WithAppendSlice(config *Config) { + config.AppendSlice = true +} + +func merge(dst, src interface{}, opts ...func(*Config)) error { var ( vDst, vSrc reflect.Value err error ) + + config := &Config{} + + for _, opt := range opts { + opt(config) + } + if vDst, vSrc, err = resolveValues(dst, src); err != nil { return err } if vDst.Type() != vSrc.Type() { return ErrDifferentArgumentsTypes } - return deepMerge(vDst, vSrc, make(map[uintptr]*visit), 0, overwrite) + return deepMerge(vDst, vSrc, make(map[uintptr]*visit), 0, config) } -- cgit v1.2.3-54-g00ecf