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124 lines
4.5 KiB
Markdown
124 lines
4.5 KiB
Markdown
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[](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)
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*go-git* is a highly extensible git implementation library written in **pure Go**.
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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 types 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.
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It's being actively developed since 2015 and is being used extensively by [source{d}](https://sourced.tech/) and [Keybase](https://keybase.io/blog/encrypted-git-for-everyone), and by many other libraries and tools.
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Comparison with git
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-------------------
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*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.
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*git* is a humongous project with years of development by thousands of contributors, making it challenging for *go-git* to implement all the features. You can find a comparison of *go-git* vs *git* in the [compatibility documentation](COMPATIBILITY.md).
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Installation
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------------
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The recommended way to install *go-git* is:
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```
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go get -u gopkg.in/src-d/go-git.v4/...
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```
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> We use [gopkg.in](http://labix.org/gopkg.in) to version the API, this means that when `go get` clones the package, it's the latest tag matching `v4.*` that is cloned and not the master branch.
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Examples
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--------
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> Please note that the `CheckIfError` and `Info` functions 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.
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### Basic example
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A basic example that mimics the standard `git clone` command
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```go
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// Clone the given repository to the given directory
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Info("git clone https://github.com/src-d/go-git")
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_, err := git.PlainClone("/tmp/foo", false, &git.CloneOptions{
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URL: "https://github.com/src-d/go-git",
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Progress: os.Stdout,
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})
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CheckIfError(err)
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```
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Outputs:
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```
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Counting objects: 4924, done.
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Compressing objects: 100% (1333/1333), done.
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Total 4924 (delta 530), reused 6 (delta 6), pack-reused 3533
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```
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### In-memory example
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Cloning a repository into memory and printing the history of HEAD, just like `git log` does
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```go
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// Clones the given repository in memory, creating the remote, the local
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// branches and fetching the objects, exactly as:
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Info("git clone https://github.com/src-d/go-siva")
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r, err := git.Clone(memory.NewStorage(), nil, &git.CloneOptions{
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URL: "https://github.com/src-d/go-siva",
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})
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CheckIfError(err)
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// Gets the HEAD history from HEAD, just like this command:
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Info("git log")
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// ... retrieves the branch pointed by HEAD
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ref, err := r.Head()
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CheckIfError(err)
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// ... retrieves the commit history
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cIter, err := r.Log(&git.LogOptions{From: ref.Hash()})
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CheckIfError(err)
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// ... just iterates over the commits, printing it
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err = cIter.ForEach(func(c *object.Commit) error {
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fmt.Println(c)
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return nil
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})
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CheckIfError(err)
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```
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Outputs:
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```
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commit ded8054fd0c3994453e9c8aacaf48d118d42991e
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Author: Santiago M. Mola <santi@mola.io>
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Date: Sat Nov 12 21:18:41 2016 +0100
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index: ReadFrom/WriteTo returns IndexReadError/IndexWriteError. (#9)
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commit df707095626f384ce2dc1a83b30f9a21d69b9dfc
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Author: Santiago M. Mola <santi@mola.io>
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Date: Fri Nov 11 13:23:22 2016 +0100
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readwriter: fix bug when writing index. (#10)
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When using ReadWriter on an existing siva file, absolute offset for
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index entries was not being calculated correctly.
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...
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```
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You can find this [example](_examples/log/main.go) and many others in the [examples](_examples) folder.
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Contribute
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----------
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[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
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our [Contributing Guidelines](CONTRIBUTING.md).
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License
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-------
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Apache License Version 2.0, see [LICENSE](LICENSE)
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