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1 files changed, 116 insertions, 22 deletions
diff --git a/vendor/github.com/imdario/mergo/README.md b/vendor/github.com/imdario/mergo/README.md index f4769cdd7..8b76f1fbf 100644 --- a/vendor/github.com/imdario/mergo/README.md +++ b/vendor/github.com/imdario/mergo/README.md @@ -2,17 +2,17 @@ A helper to merge structs and maps in Golang. Useful for configuration default values, avoiding messy if-statements. -Also a lovely [comune](http://en.wikipedia.org/wiki/Mergo) (municipality) in the Province of Ancona in the Italian region Marche. - - +Also a lovely [comune](http://en.wikipedia.org/wiki/Mergo) (municipality) in the Province of Ancona in the Italian region of Marche. ## Status -It is ready for production use. It works fine after extensive use in the wild. +It is ready for production use. [It is used in several projects by Docker, Google, The Linux Foundation, VMWare, Shopify, etc](https://github.com/imdario/mergo#mergo-in-the-wild). -[![Build Status][1]][2] [![GoDoc][3]][4] [![GoCard][5]][6] +[![Build Status][1]][2] +[![Coverage Status][7]][8] +[![Sourcegraph][9]][10] [1]: https://travis-ci.org/imdario/mergo.png [2]: https://travis-ci.org/imdario/mergo @@ -20,19 +20,54 @@ It is ready for production use. It works fine after extensive use in the wild. [4]: https://godoc.org/github.com/imdario/mergo [5]: https://goreportcard.com/badge/imdario/mergo [6]: https://goreportcard.com/report/github.com/imdario/mergo +[7]: https://coveralls.io/repos/github/imdario/mergo/badge.svg?branch=master +[8]: https://coveralls.io/github/imdario/mergo?branch=master +[9]: https://sourcegraph.com/github.com/imdario/mergo/-/badge.svg +[10]: https://sourcegraph.com/github.com/imdario/mergo?badge + +### Latest release + +[Release v0.3.6](https://github.com/imdario/mergo/releases/tag/v0.3.6). ### Important note -Mergo is intended to assign **only** zero value fields on destination with source value. Since April 6th it works like this. Before it didn't work properly, causing some random overwrites. After some issues and PRs I found it didn't merge as I designed it. Thanks to [imdario/mergo#8](https://github.com/imdario/mergo/pull/8) overwriting functions were added and the wrong behavior was clearly detected. +Please keep in mind that in [0.3.2](//github.com/imdario/mergo/releases/tag/0.3.2) Mergo changed `Merge()`and `Map()` signatures to support [transformers](#transformers). An optional/variadic argument has been added, so it won't break existing code. If you were using Mergo **before** April 6th 2015, please check your project works as intended after updating your local copy with ```go get -u github.com/imdario/mergo```. I apologize for any issue caused by its previous behavior and any future bug that Mergo could cause (I hope it won't!) in existing projects after the change (release 0.2.0). +### Donations + +If Mergo is useful to you, consider buying me a coffee, a beer or making a monthly donation so I can keep building great free software. :heart_eyes: + +<a href='https://ko-fi.com/B0B58839' target='_blank'><img height='36' style='border:0px;height:36px;' src='https://az743702.vo.msecnd.net/cdn/kofi1.png?v=0' border='0' alt='Buy Me a Coffee at ko-fi.com' /></a> +[](https://beerpay.io/imdario/mergo) +[](https://beerpay.io/imdario/mergo) +<a href="https://liberapay.com/dario/donate"><img alt="Donate using Liberapay" src="https://liberapay.com/assets/widgets/donate.svg"></a> + ### Mergo in the wild -- [docker/docker](https://github.com/docker/docker/) -- [GoogleCloudPlatform/kubernetes](https://github.com/GoogleCloudPlatform/kubernetes) +- [moby/moby](https://github.com/moby/moby) +- [kubernetes/kubernetes](https://github.com/kubernetes/kubernetes) +- [vmware/dispatch](https://github.com/vmware/dispatch) +- [Shopify/themekit](https://github.com/Shopify/themekit) - [imdario/zas](https://github.com/imdario/zas) +- [matcornic/hermes](https://github.com/matcornic/hermes) +- [OpenBazaar/openbazaar-go](https://github.com/OpenBazaar/openbazaar-go) +- [kataras/iris](https://github.com/kataras/iris) +- [michaelsauter/crane](https://github.com/michaelsauter/crane) +- [go-task/task](https://github.com/go-task/task) +- [sensu/uchiwa](https://github.com/sensu/uchiwa) +- [ory/hydra](https://github.com/ory/hydra) +- [sisatech/vcli](https://github.com/sisatech/vcli) +- [dairycart/dairycart](https://github.com/dairycart/dairycart) +- [projectcalico/felix](https://github.com/projectcalico/felix) +- [resin-os/balena](https://github.com/resin-os/balena) +- [go-kivik/kivik](https://github.com/go-kivik/kivik) +- [Telefonica/govice](https://github.com/Telefonica/govice) +- [supergiant/supergiant](supergiant/supergiant) +- [SergeyTsalkov/brooce](https://github.com/SergeyTsalkov/brooce) - [soniah/dnsmadeeasy](https://github.com/soniah/dnsmadeeasy) +- [ohsu-comp-bio/funnel](https://github.com/ohsu-comp-bio/funnel) - [EagerIO/Stout](https://github.com/EagerIO/Stout) - [lynndylanhurley/defsynth-api](https://github.com/lynndylanhurley/defsynth-api) - [russross/canvasassignments](https://github.com/russross/canvasassignments) @@ -50,6 +85,7 @@ If you were using Mergo **before** April 6th 2015, please check your project wor - [thoas/picfit](https://github.com/thoas/picfit) - [mantasmatelis/whooplist-server](https://github.com/mantasmatelis/whooplist-server) - [jnuthong/item_search](https://github.com/jnuthong/item_search) +- [bukalapak/snowboard](https://github.com/bukalapak/snowboard) ## Installation @@ -62,19 +98,31 @@ If you were using Mergo **before** April 6th 2015, please check your project wor ## Usage -You can only merge same-type structs with exported fields initialized as zero value of their type and same-types maps. Mergo won't merge unexported (private) fields but will do recursively any exported one. Also maps will be merged recursively except for structs inside maps (because they are not addressable using Go reflection). +You can only merge same-type structs with exported fields initialized as zero value of their type and same-types maps. Mergo won't merge unexported (private) fields but will do recursively any exported one. It won't merge empty structs value as [they are not considered zero values](https://golang.org/ref/spec#The_zero_value) either. Also maps will be merged recursively except for structs inside maps (because they are not addressable using Go reflection). + +```go +if err := mergo.Merge(&dst, src); err != nil { + // ... +} +``` + +Also, you can merge overwriting values using the transformer `WithOverride`. - if err := mergo.Merge(&dst, src); err != nil { - // ... - } +```go +if err := mergo.Merge(&dst, src, mergo.WithOverride); err != nil { + // ... +} +``` -Additionally, you can map a map[string]interface{} to a struct (and otherwise, from struct to map), following the same restrictions as in Merge(). Keys are capitalized to find each corresponding exported field. +Additionally, you can map a `map[string]interface{}` to a struct (and otherwise, from struct to map), following the same restrictions as in `Merge()`. Keys are capitalized to find each corresponding exported field. - if err := mergo.Map(&dst, srcMap); err != nil { - // ... - } +```go +if err := mergo.Map(&dst, srcMap); err != nil { + // ... +} +``` -Warning: if you map a struct to map, it won't do it recursively. Don't expect Mergo to map struct members of your struct as map[string]interface{}. They will be just assigned as values. +Warning: if you map a struct to map, it won't do it recursively. Don't expect Mergo to map struct members of your struct as `map[string]interface{}`. They will be just assigned as values. More information and examples in [godoc documentation](http://godoc.org/github.com/imdario/mergo). @@ -96,15 +144,12 @@ type Foo struct { func main() { src := Foo{ A: "one", + B: 2, } - dest := Foo{ A: "two", - B: 2, } - mergo.Merge(&dest, src) - fmt.Println(dest) // Will print // {two 2} @@ -113,7 +158,56 @@ func main() { Note: if test are failing due missing package, please execute: - go get gopkg.in/yaml.v1 + go get gopkg.in/yaml.v2 + +### Transformers + +Transformers allow to merge specific types differently than in the default behavior. In other words, now you can customize how some types are merged. For example, `time.Time` is a struct; it doesn't have zero value but IsZero can return true because it has fields with zero value. How can we merge a non-zero `time.Time`? + +```go +package main + +import ( + "fmt" + "github.com/imdario/mergo" + "reflect" + "time" +) + +type timeTransfomer struct { +} + +func (t timeTransfomer) Transformer(typ reflect.Type) func(dst, src reflect.Value) error { + if typ == reflect.TypeOf(time.Time{}) { + return func(dst, src reflect.Value) error { + if dst.CanSet() { + isZero := dst.MethodByName("IsZero") + result := isZero.Call([]reflect.Value{}) + if result[0].Bool() { + dst.Set(src) + } + } + return nil + } + } + return nil +} + +type Snapshot struct { + Time time.Time + // ... +} + +func main() { + src := Snapshot{time.Now()} + dest := Snapshot{} + mergo.Merge(&dest, src, mergo.WithTransformers(timeTransfomer{})) + fmt.Println(dest) + // Will print + // { 2018-01-12 01:15:00 +0000 UTC m=+0.000000001 } +} +``` + ## Contact me |