forked from forgejo/forgejo
Update to go-git v5.1.0 (#11936)
Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: techknowlogick <techknowlogick@gitea.io>
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# Mergo
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A helper to merge structs and maps in Golang. Useful for configuration default values, avoiding messy if-statements.
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Also a lovely [comune](http://en.wikipedia.org/wiki/Mergo) (municipality) in the Province of Ancona in the Italian region of Marche.
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## Status
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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).
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[![GoDoc][3]][4]
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[![GoCard][5]][6]
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[![Build Status][1]][2]
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[![Coverage Status][7]][8]
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[![Sourcegraph][9]][10]
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[](https://app.fossa.io/projects/git%2Bgithub.com%2Fimdario%2Fmergo?ref=badge_shield)
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[1]: https://travis-ci.org/imdario/mergo.png
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[2]: https://travis-ci.org/imdario/mergo
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[3]: https://godoc.org/github.com/imdario/mergo?status.svg
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[4]: https://godoc.org/github.com/imdario/mergo
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[5]: https://goreportcard.com/badge/imdario/mergo
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[6]: https://goreportcard.com/report/github.com/imdario/mergo
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[7]: https://coveralls.io/repos/github/imdario/mergo/badge.svg?branch=master
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[8]: https://coveralls.io/github/imdario/mergo?branch=master
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[9]: https://sourcegraph.com/github.com/imdario/mergo/-/badge.svg
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[10]: https://sourcegraph.com/github.com/imdario/mergo?badge
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### Latest release
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[Release v0.3.7](https://github.com/imdario/mergo/releases/tag/v0.3.7).
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### Important note
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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.
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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).
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### Donations
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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:
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<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>
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[](https://beerpay.io/imdario/mergo)
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[](https://beerpay.io/imdario/mergo)
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<a href="https://liberapay.com/dario/donate"><img alt="Donate using Liberapay" src="https://liberapay.com/assets/widgets/donate.svg"></a>
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### Mergo in the wild
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- [moby/moby](https://github.com/moby/moby)
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- [kubernetes/kubernetes](https://github.com/kubernetes/kubernetes)
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- [vmware/dispatch](https://github.com/vmware/dispatch)
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- [Shopify/themekit](https://github.com/Shopify/themekit)
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- [imdario/zas](https://github.com/imdario/zas)
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- [matcornic/hermes](https://github.com/matcornic/hermes)
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- [OpenBazaar/openbazaar-go](https://github.com/OpenBazaar/openbazaar-go)
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- [kataras/iris](https://github.com/kataras/iris)
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- [michaelsauter/crane](https://github.com/michaelsauter/crane)
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- [go-task/task](https://github.com/go-task/task)
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- [sensu/uchiwa](https://github.com/sensu/uchiwa)
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- [ory/hydra](https://github.com/ory/hydra)
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- [sisatech/vcli](https://github.com/sisatech/vcli)
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- [dairycart/dairycart](https://github.com/dairycart/dairycart)
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- [projectcalico/felix](https://github.com/projectcalico/felix)
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- [resin-os/balena](https://github.com/resin-os/balena)
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- [go-kivik/kivik](https://github.com/go-kivik/kivik)
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- [Telefonica/govice](https://github.com/Telefonica/govice)
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- [supergiant/supergiant](supergiant/supergiant)
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- [SergeyTsalkov/brooce](https://github.com/SergeyTsalkov/brooce)
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- [soniah/dnsmadeeasy](https://github.com/soniah/dnsmadeeasy)
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- [ohsu-comp-bio/funnel](https://github.com/ohsu-comp-bio/funnel)
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- [EagerIO/Stout](https://github.com/EagerIO/Stout)
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- [lynndylanhurley/defsynth-api](https://github.com/lynndylanhurley/defsynth-api)
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- [russross/canvasassignments](https://github.com/russross/canvasassignments)
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- [rdegges/cryptly-api](https://github.com/rdegges/cryptly-api)
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- [casualjim/exeggutor](https://github.com/casualjim/exeggutor)
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- [divshot/gitling](https://github.com/divshot/gitling)
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- [RWJMurphy/gorl](https://github.com/RWJMurphy/gorl)
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- [andrerocker/deploy42](https://github.com/andrerocker/deploy42)
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- [elwinar/rambler](https://github.com/elwinar/rambler)
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- [tmaiaroto/gopartman](https://github.com/tmaiaroto/gopartman)
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- [jfbus/impressionist](https://github.com/jfbus/impressionist)
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- [Jmeyering/zealot](https://github.com/Jmeyering/zealot)
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- [godep-migrator/rigger-host](https://github.com/godep-migrator/rigger-host)
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- [Dronevery/MultiwaySwitch-Go](https://github.com/Dronevery/MultiwaySwitch-Go)
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- [thoas/picfit](https://github.com/thoas/picfit)
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- [mantasmatelis/whooplist-server](https://github.com/mantasmatelis/whooplist-server)
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- [jnuthong/item_search](https://github.com/jnuthong/item_search)
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- [bukalapak/snowboard](https://github.com/bukalapak/snowboard)
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## Installation
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go get github.com/imdario/mergo
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// use in your .go code
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import (
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"github.com/imdario/mergo"
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)
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## Usage
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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).
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```go
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if err := mergo.Merge(&dst, src); err != nil {
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// ...
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}
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```
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Also, you can merge overwriting values using the transformer `WithOverride`.
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```go
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if err := mergo.Merge(&dst, src, mergo.WithOverride); err != nil {
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// ...
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}
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```
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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.
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```go
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if err := mergo.Map(&dst, srcMap); err != nil {
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// ...
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}
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```
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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.
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More information and examples in [godoc documentation](http://godoc.org/github.com/imdario/mergo).
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### Nice example
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```go
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package main
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import (
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"fmt"
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"github.com/imdario/mergo"
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)
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type Foo struct {
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A string
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B int64
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}
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func main() {
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src := Foo{
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A: "one",
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B: 2,
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}
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dest := Foo{
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A: "two",
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}
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mergo.Merge(&dest, src)
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fmt.Println(dest)
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// Will print
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// {two 2}
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}
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```
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Note: if test are failing due missing package, please execute:
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go get gopkg.in/yaml.v2
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### Transformers
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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`?
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```go
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package main
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import (
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"fmt"
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"github.com/imdario/mergo"
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"reflect"
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"time"
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)
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type timeTransfomer struct {
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}
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func (t timeTransfomer) Transformer(typ reflect.Type) func(dst, src reflect.Value) error {
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if typ == reflect.TypeOf(time.Time{}) {
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return func(dst, src reflect.Value) error {
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if dst.CanSet() {
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isZero := dst.MethodByName("IsZero")
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result := isZero.Call([]reflect.Value{})
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if result[0].Bool() {
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dst.Set(src)
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}
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}
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return nil
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}
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}
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return nil
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}
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type Snapshot struct {
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Time time.Time
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// ...
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}
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func main() {
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src := Snapshot{time.Now()}
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dest := Snapshot{}
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mergo.Merge(&dest, src, mergo.WithTransformers(timeTransfomer{}))
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fmt.Println(dest)
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// Will print
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// { 2018-01-12 01:15:00 +0000 UTC m=+0.000000001 }
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}
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```
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## Contact me
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If I can help you, you have an idea or you are using Mergo in your projects, don't hesitate to drop me a line (or a pull request): [@im_dario](https://twitter.com/im_dario)
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## About
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Written by [Dario Castañé](http://dario.im).
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## Top Contributors
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[](https://sourcerer.io/fame/imdario/imdario/mergo/links/0)
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[](https://sourcerer.io/fame/imdario/imdario/mergo/links/1)
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[](https://sourcerer.io/fame/imdario/imdario/mergo/links/2)
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[](https://sourcerer.io/fame/imdario/imdario/mergo/links/3)
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[](https://sourcerer.io/fame/imdario/imdario/mergo/links/4)
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[](https://sourcerer.io/fame/imdario/imdario/mergo/links/5)
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[](https://sourcerer.io/fame/imdario/imdario/mergo/links/6)
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[](https://sourcerer.io/fame/imdario/imdario/mergo/links/7)
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## License
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[BSD 3-Clause](http://opensource.org/licenses/BSD-3-Clause) license, as [Go language](http://golang.org/LICENSE).
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[](https://app.fossa.io/projects/git%2Bgithub.com%2Fimdario%2Fmergo?ref=badge_large)
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