[](https://godoc.org/github.com/src-d/go-git) [](https://travis-ci.org/src-d/go-git) [](https://ci.appveyor.com/project/mcuadros/go-git) [](https://codecov.io/github/src-d/go-git) [](https://goreportcard.com/report/github.com/src-d/go-git)
*go-git* is a highly extensible git implementation library written in **pure Go**.
It can be used to manipulate git repositories at low level *(plumbing)* or high level *(porcelain)*, through an idiomatic Go API. It also supports several type of storage, such as in-memory filesystems, or custom implementations thanks to the [`Storer`](https://godoc.org/gopkg.in/src-d/go-git.v4/plumbing/storer) interface.
It's being actively develop since 2015 and is being use extensively by [source{d}](https://sourced.tech/) and [Keybase](https://keybase.io/blog/encrypted-git-for-everyone), and by many other libraries and tools.
Comparison with git
-------------------
*go-git* aims to be fully compatible with [git](https://github.com/git/git), all the *porcelain* operations are implemented to work exactly as *git* does.
*git* is a humongous project with years of development by thousands of contributors, making it challenging for *go-git* implement all the features. You can find a comparison of *go-git* vs *git* in the [compatibility documentation](COMPATIBILITY.md).
Installation
------------
The recommended way to install *go-git* is:
```
go get -u gopkg.in/src-d/go-git.v4/...
```
> We use [gopkg.in](http://labix.org/gopkg.in) for having a versioned API, this means that when `go get` clones the package, is the latest tag matching `v4.*` cloned and not the master branch.
Examples
--------
> Please note that the functions `CheckIfError` and `Info` used in the examples are from the [examples package](https://github.com/src-d/go-git/blob/master/_examples/common.go#L17) just to be used in the examples.
### Basic example
A basic example that mimics the standard `git clone` command
```go
// Clone the given repository to the given directory
Info("git clone https://github.com/src-d/go-git")
_, err := git.PlainClone("/tmp/foo", false, &git.CloneOptions{
URL: "https://github.com/src-d/go-git",
Progress: os.Stdout,
})
CheckIfError(err)
```
Outputs:
```
Counting objects: 4924, done.
Compressing objects: 100% (1333/1333), done.
Total 4924 (delta 530), reused 6 (delta 6), pack-reused 3533
```
### In-memory example
Cloning a repository into memory and printing the history of HEAD, just like `git log` does
```go
// Clones the given repository in memory, creating the remote, the local
// branches and fetching the objects, exactly as:
Info("git clone https://github.com/src-d/go-siva")
r, err := git.Clone(memory.NewStorage(), nil, &git.CloneOptions{
URL: "https://github.com/src-d/go-siva",
})
CheckIfError(err)
// Gets the HEAD history from HEAD, just like does:
Info("git log")
// ... retrieves the branch pointed by HEAD
ref, err := r.Head()
CheckIfError(err)
// ... retrieves the commit history
cIter, err := r.Log(&git.LogOptions{From: ref.Hash()})
CheckIfError(err)
// ... just iterates over the commits, printing it
err = cIter.ForEach(func(c *object.Commit) error {
fmt.Println(c)
return nil
})
CheckIfError(err)
```
Outputs:
```
commit ded8054fd0c3994453e9c8aacaf48d118d42991e
Author: Santiago M. Mola <santi@mola.io>
Date: Sat Nov 12 21:18:41 2016 +0100
index: ReadFrom/WriteTo returns IndexReadError/IndexWriteError. (#9)
commit df707095626f384ce2dc1a83b30f9a21d69b9dfc
Author: Santiago M. Mola <santi@mola.io>
Date: Fri Nov 11 13:23:22 2016 +0100
readwriter: fix bug when writing index. (#10)
When using ReadWriter on an existing siva file, absolute offset for
index entries was not being calculated correctly.
...
```
You can find this [example](_examples/log/main.go) and many others at the [examples](_examples) folder
Contribute
----------
[Contributions](https://github.com/src-d/go-git/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22) are more than welcome, if you are interested please take a look to
our [Contributing Guidelines](CONTRIBUTING.md).
License
-------
Apache License Version 2.0, see [LICENSE](LICENSE)
