88 lines
3.5 KiB
Markdown
88 lines
3.5 KiB
Markdown
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# UUID
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[](http://godoc.org/gitlab.com/pztrn/uuid)
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[](https://goreportcard.com/report/gitlab.com/pztrn/uuid)
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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.
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This package supports the following UUID versions:
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* Version 1, based on timestamp and MAC address (RFC-4122)
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* Version 2, based on timestamp, MAC address and POSIX UID/GID (DCE 1.1)
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* Version 3, based on MD5 hashing of a named value (RFC-4122)
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* Version 4, based on random numbers (RFC-4122)
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* Version 5, based on SHA-1 hashing of a named value (RFC-4122)
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## Project History
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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forked from the [github.com/satori/go.uuid](https://github.com/satori/go.uuid) repository after it appeared to be no longer maintained, while exhibiting [critical flaws](https://github.com/satori/go.uuid/issues/73).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.
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We'd like to thank Maxim Bublis for his hard work on the original iteration of the package.
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After that it was forked again when developers [don't want to make everyone happy](https://github.com/gofrs/uuid/issues/48) because of things that out of their control. Also, package was "kind of" refactored to allow some great features be implemented.
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There is no guarantee that ``github.com/gofrs/uuid`` changes will be ported.
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## License
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This source code of this package is released under the MIT License. Please see the [LICENSE](https://gitlab.com/pztrn/uuid/blob/master/LICENSE) for the full content of the license.
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## Installation
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It is recommended to use a package manager like `dep` that understands tagged releases of a package, as well as semantic versioning.
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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:
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```Shell
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$ go get gitlab.com/pztrn/uuid
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```
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## Requirements
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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.
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## Go 1.11 Modules
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This package should be compatible with Go's modules thing. I'm not using it extensively ATM due to "really beta" stage IMO, so PRs that fixes any problems are encouraged.
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## Usage
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Here is a quick overview of how to use this package. For more detailed
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documentation, please see the [GoDoc Page](http://godoc.org/gitlab.com/pztrn/uuid).
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```go
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package main
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import (
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"log"
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"gitlab.com/pztrn/uuid"
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)
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// Create a Version 4 UUID, panicking on error.
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// Use this form to initialize package-level variables.
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var u1 = uuid.Must(uuid.NewV4())
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func main() {
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// Create a Version 4 UUID.
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u2, err := uuid.NewV4()
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if err != nil {
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log.Fatalf("failed to generate UUID: %v", err)
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}
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log.Printf("generated Version 4 UUID %v", u2)
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// Parse a UUID from a string.
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s := "6ba7b810-9dad-11d1-80b4-00c04fd430c8"
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u3, err := uuid.FromString(s)
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if err != nil {
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log.Fatalf("failed to parse UUID %q: %v", s, err)
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}
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log.Printf("successfully parsed UUID %v", u3)
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}
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```
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## References
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* [RFC-4122](https://tools.ietf.org/html/rfc4122)
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* [DCE 1.1: Authentication and Security Services](http://pubs.opengroup.org/onlinepubs/9696989899/chap5.htm#tagcjh_08_02_01_01)
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