forked from TrueCloudLab/distribution
109 lines
4.3 KiB
Markdown
109 lines
4.3 KiB
Markdown
|
# UUID
|
||
|
|
|
||
|
|
[](https://github.com/gofrs/uuid/blob/master/LICENSE)
|
||
|
|
[](https://travis-ci.org/gofrs/uuid)
|
||
|
|
[](http://godoc.org/github.com/gofrs/uuid)
|
||
|
|
[](https://codecov.io/gh/gofrs/uuid/)
|
||
|
|
[](https://goreportcard.com/report/github.com/gofrs/uuid)
|
||
|
|
|
||
|
|
Package uuid provides a pure Go implementation of Universally Unique Identifiers
|
||
|
|
(UUID) variant as defined in RFC-4122. This package supports both the creation
|
||
|
|
and parsing of UUIDs in different formats.
|
||
|
|
|
||
|
|
This package supports the following UUID versions:
|
||
|
|
* Version 1, based on timestamp and MAC address (RFC-4122)
|
||
|
|
* Version 3, based on MD5 hashing of a named value (RFC-4122)
|
||
|
|
* Version 4, based on random numbers (RFC-4122)
|
||
|
|
* Version 5, based on SHA-1 hashing of a named value (RFC-4122)
|
||
|
|
|
||
|
|
## Project History
|
||
|
|
|
||
|
|
This project was originally forked from the
|
||
|
|
[github.com/satori/go.uuid](https://github.com/satori/go.uuid) repository after
|
||
|
|
it appeared to be no longer maintained, while exhibiting [critical
|
||
|
|
flaws](https://github.com/satori/go.uuid/issues/73). We have decided to take
|
||
|
|
over this project to ensure it receives regular maintenance for the benefit of
|
||
|
|
the larger Go community.
|
||
|
|
|
||
|
|
We'd like to thank Maxim Bublis for his hard work on the original iteration of
|
||
|
|
the package.
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
This source code of this package is released under the MIT License. Please see
|
||
|
|
the [LICENSE](https://github.com/gofrs/uuid/blob/master/LICENSE) for the full
|
||
|
|
content of the license.
|
||
|
|
|
||
|
|
## Recommended Package Version
|
||
|
|
|
||
|
|
We recommend using v2.0.0+ of this package, as versions prior to 2.0.0 were
|
||
|
|
created before our fork of the original package and have some known
|
||
|
|
deficiencies.
|
||
|
|
|
||
|
|
## Installation
|
||
|
|
|
||
|
|
It is recommended to use a package manager like `dep` that understands tagged
|
||
|
|
releases of a package, as well as semantic versioning.
|
||
|
|
|
||
|
|
If you are unable to make use of a dependency manager with your project, you can
|
||
|
|
use the `go get` command to download it directly:
|
||
|
|
|
||
|
|
```Shell
|
||
|
|
$ go get github.com/gofrs/uuid
|
||
|
|
```
|
||
|
|
|
||
|
|
## Requirements
|
||
|
|
|
||
|
|
Due to subtests not being supported in older versions of Go, this package is
|
||
|
|
only regularly tested against Go 1.7+. This package may work perfectly fine with
|
||
|
|
Go 1.2+, but support for these older versions is not actively maintained.
|
||
|
|
|
||
|
|
## Go 1.11 Modules
|
||
|
|
|
||
|
|
As of v3.2.0, this repository no longer adopts Go modules, and v3.2.0 no longer has a `go.mod` file. As a result, v3.2.0 also drops support for the `github.com/gofrs/uuid/v3` import path. Only module-based consumers are impacted. With the v3.2.0 release, _all_ gofrs/uuid consumers should use the `github.com/gofrs/uuid` import path.
|
||
|
|
|
||
|
|
An existing module-based consumer will continue to be able to build using the `github.com/gofrs/uuid/v3` import path using any valid consumer `go.mod` that worked prior to the publishing of v3.2.0, but any module-based consumer should start using the `github.com/gofrs/uuid` import path when possible and _must_ use the `github.com/gofrs/uuid` import path prior to upgrading to v3.2.0.
|
||
|
|
|
||
|
|
Please refer to [Issue #61](https://github.com/gofrs/uuid/issues/61) and [Issue #66](https://github.com/gofrs/uuid/issues/66) for more details.
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
Here is a quick overview of how to use this package. For more detailed
|
||
|
|
documentation, please see the [GoDoc Page](http://godoc.org/github.com/gofrs/uuid).
|
||
|
|
|
||
|
|
```go
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"log"
|
||
|
|
|
||
|
|
"github.com/gofrs/uuid"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Create a Version 4 UUID, panicking on error.
|
||
|
|
// Use this form to initialize package-level variables.
|
||
|
|
var u1 = uuid.Must(uuid.NewV4())
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
// Create a Version 4 UUID.
|
||
|
|
u2, err := uuid.NewV4()
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("failed to generate UUID: %v", err)
|
||
|
|
}
|
||
|
|
log.Printf("generated Version 4 UUID %v", u2)
|
||
|
|
|
||
|
|
// Parse a UUID from a string.
|
||
|
|
s := "6ba7b810-9dad-11d1-80b4-00c04fd430c8"
|
||
|
|
u3, err := uuid.FromString(s)
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("failed to parse UUID %q: %v", s, err)
|
||
|
|
}
|
||
|
|
log.Printf("successfully parsed UUID %v", u3)
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
## References
|
||
|
|
|
||
|
|
* [RFC-4122](https://tools.ietf.org/html/rfc4122)
|
||
|
|
* [DCE 1.1: Authentication and Security Services](http://pubs.opengroup.org/onlinepubs/9696989899/chap5.htm#tagcjh_08_02_01_01)
|