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moby--moby/vendor/gopkg.in/yaml.v2
Akihiro Suda 5a1b06d7fd rerun vndr
* run latest vndr so as to collect more LICENSE files
 * remove unused packages
 * vendor github.com/philhofer/fwd with LICENSE.md (MIT)
 * vendor github.com/bsphere/le_go with LICENSE (MIT)

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
2017-03-08 02:29:34 +00:00
..
apic.go
decode.go Update Go Yaml 2017-02-06 13:08:58 +00:00
emitterc.go
encode.go
LICENSE Update Go Yaml 2017-02-06 13:08:58 +00:00
LICENSE.libyaml rerun vndr 2017-03-08 02:29:34 +00:00
parserc.go
readerc.go
README.md rerun vndr 2017-03-08 02:29:34 +00:00
resolve.go Update Go Yaml 2017-02-06 13:08:58 +00:00
scannerc.go
sorter.go
writerc.go
yaml.go
yamlh.go
yamlprivateh.go

YAML support for the Go language

Introduction

The yaml package enables Go programs to comfortably encode and decode YAML values. It was developed within Canonical as part of the juju project, and is based on a pure Go port of the well-known libyaml C library to parse and generate YAML data quickly and reliably.

Compatibility

The yaml package supports most of YAML 1.1 and 1.2, including support for anchors, tags, map merging, etc. Multi-document unmarshalling is not yet implemented, and base-60 floats from YAML 1.1 are purposefully not supported since they're a poor design and are gone in YAML 1.2.

Installation and usage

The import path for the package is gopkg.in/yaml.v2.

To install it, run:

go get gopkg.in/yaml.v2

API documentation

If opened in a browser, the import path itself leads to the API documentation:

API stability

The package API for yaml v2 will remain stable as described in gopkg.in.

License

The yaml package is licensed under the Apache License 2.0. Please see the LICENSE file for details.

Example

package main

import (
        "fmt"
        "log"

        "gopkg.in/yaml.v2"
)

var data = `
a: Easy!
b:
  c: 2
  d: [3, 4]
`

type T struct {
        A string
        B struct {
                RenamedC int   `yaml:"c"`
                D        []int `yaml:",flow"`
        }
}

func main() {
        t := T{}
    
        err := yaml.Unmarshal([]byte(data), &t)
        if err != nil {
                log.Fatalf("error: %v", err)
        }
        fmt.Printf("--- t:\n%v\n\n", t)
    
        d, err := yaml.Marshal(&t)
        if err != nil {
                log.Fatalf("error: %v", err)
        }
        fmt.Printf("--- t dump:\n%s\n\n", string(d))
    
        m := make(map[interface{}]interface{})
    
        err = yaml.Unmarshal([]byte(data), &m)
        if err != nil {
                log.Fatalf("error: %v", err)
        }
        fmt.Printf("--- m:\n%v\n\n", m)
    
        d, err = yaml.Marshal(&m)
        if err != nil {
                log.Fatalf("error: %v", err)
        }
        fmt.Printf("--- m dump:\n%s\n\n", string(d))
}

This example will generate the following output:

--- t:
{Easy! {2 [3 4]}}

--- t dump:
a: Easy!
b:
  c: 2
  d: [3, 4]


--- m:
map[a:Easy! b:map[c:2 d:[3 4]]]

--- m dump:
a: Easy!
b:
  c: 2
  d:
  - 3
  - 4