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dependency tool for go

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Godep - Archived

Name: godep
Brand: godep
SKU: //tools/godep
Rating: 4.514 (5626 reviews)

Please use dep or another tool instead.

The rest of this readme is preserved for those that may still need its contents.

godep helps build packages reproducibly by fixing their dependencies.

This tool assumes you are working in a standard Go workspace, as described here. We expect godep to build on Go 1.4* or newer, but you can use it on any project that works with Go 1 or newer.

Please check the FAQ if you have a question.

Golang Dep

The Go community now has the dep project to manage dependencies. Please consider trying to migrate from Godep to dep. If there is an issue preventing you from migrating please file an issue with dep so the problem can be corrected. Godep will continue to be supported for some time but is considered to be in a state of support rather than active feature development.

Install

go get github.com/tools/godep

How to use godep with a new project

Assuming you've got everything working already, so you can build your project with

go install

and test it with

go test

, it's one command to start using:

godep save

This will save a list of dependencies to the file

Godeps/Godeps.json

and copy their source code into

vendor/

(or

Godeps/_workspace/

when using older versions of Go). Godep does not copy:

files from source repositories that are not tracked in version control.
```
*_test.go
```
files.
```
testdata
```
directories.
files outside of the go packages.

Godep does not process the imports of

.go

files with either the

ignore

appengine

build tags.

Test files and testdata directories can be saved by adding

-t

Read over the contents of

vendor/

and make sure it looks reasonable. Then commit the

Godeps/

and

vendor/

directories to version control.

The deprecated

-r

flag

For older versions of Go, the

-r

flag tells save to automatically rewrite package import paths. This allows your code to refer directly to the copied dependencies in

Godeps/_workspace

. So, a package C that depends on package D will actually import

C/Godeps/_workspace/src/D

. This makes C's repo self-contained and causes

go get

to build C with the right version of all dependencies.

If you don't use

-r

, when using older version of Go, then in order to use the fixed dependencies and get reproducible builds, you must make sure that every time you run a Go-related command, you wrap it in one of these two ways:

If the command you are running is just
```
go
```
, run it as
```
godep go ...
```
, e.g.
```
godep go install -v ./...
```
When using a different command, set your
```
$GOPATH
```
using
```
godep path
```
as described below.

-r

isn't necessary with go1.6+ and isn't allowed.

Additional Operations

Restore

The

godep restore

installs the package versions specified in

Godeps/Godeps.json

to your

$GOPATH

. This modifies the state of packages in your

$GOPATH

. NOTE:

godep restore

leaves git repositories in a detached state.

go1.6

+ no longer checks out the master branch when doing a

go get

, see here.

If you run
godep restore
in your main
$GOPATH
go get -u
will fail on packages that are behind master.

Please see the FAQ section about restore.

Edit-test Cycle

Edit code
Run
```
godep go test
```
(repeat)

Add a Dependency

To add a new package foo/bar, do this:

Run
```
go get foo/bar
```
Edit your code to import foo/bar.
Run
```
godep save
```
(or
```
godep save ./...
```
).

Update a Dependency

To update a package from your

$GOPATH

, do this:

Run
```
go get -u foo/bar
```
Run
```
godep update foo/bar
```
.

You can use the

...

wildcard, for example

godep update foo/...

. Before comitting the change, you'll probably want to inspect the changes to Godeps, for example with

git diff

, and make sure it looks reasonable.

Multiple Packages

If your repository has more than one package, you're probably accustomed to running commands like

go test ./...

go install ./...

, and

go fmt ./...

. Similarly, you should run

godep save ./...

to capture the dependencies of all packages in your application.

File Format

Godeps is a json file with the following structure:

type Godeps struct {
  ImportPath   string
  GoVersion    string   // Abridged output of 'go version'.
  GodepVersion string   // Abridged output of 'godep version'
  Packages     []string // Arguments to godep save, if any.
  Deps         []struct {
    ImportPath string
    Comment    string // Description of commit, if present.
    Rev        string // VCS-specific commit ID.
  }
}

Example Godeps:

{
  "ImportPath": "github.com/kr/hk",
  "GoVersion": "go1.6",
  "Deps": [
    {
      "ImportPath": "code.google.com/p/go-netrc/netrc",
      "Rev": "28676070ab99"
    },
    {
      "ImportPath": "github.com/kr/binarydist",
      "Rev": "3380ade90f8b0dfa3e363fd7d7e941fa857d0d13"
    }
  ]
}

Migrating to vendor/

Godep supports the Go 1.5+ vendor/ experiment utilizing the same environment variable that the go tooling itself supports (

GO15VENDOREXPERIMENT

godep mostly works the same way as the

go

command line tool. If you have go 1.5.X and set

GO15VENDOREXPERIMENT=1

or have go1.6.X (or devel)

vendor/

is enabled. Unless you already have a

Godeps/_workspace

. This is a safety feature and godep warns you about this.

When

vendor/

is enabled godep will write the vendored code into the top level

./vendor/

directory. A

./Godeps/Godeps.json

file is created to track the dependencies and revisions.

vendor/

is not compatible with rewrites.

There is currently no automated migration between the old Godeps workspace and the vendor directory, but the following steps should work:

# just to be safe $ unset GO15VENDOREXPERIMENT

restore currently vendored deps to the $GOPATH

$ godep restore

The next line is only needed to automatically undo rewritten imports that were

created with godep save -r.

$ godep save -r=false

Remove the old Godeps folder

$ rm -rf Godeps

If on go1.5.X to enable `vendor/`

$ export GO15VENDOREXPERIMENT=1

re-analyze deps and save to `vendor/`.

$ godep save

Add the changes to your VCS

$ git add -A . ; git commit -am "Godep workspace -> vendor/"

You should see your Godeps/_workspace/src files "moved" to vendor/.

Releasing

Increment the version in
```
version.go
```
.
Tag the commit with the same version number.
Update
```
Changelog.md
```
.

godep

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