preface

Golang is in a hole. Other blogs are in a hole

The problem

  1. downloadgopkg.in/yaml.v2
go get gopkg.in/yaml.v2
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  1. usegopkg.in/yaml.v2Official examples:
package main

import (
	"fmt"
	"log"

	"gopkg.in/yaml.v2"
)

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

// Note: struct fields must be public in order for unmarshal to
// correctly populate the data.
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)
	iferr ! = nil { log.Fatalf("error: %v", err)
	}
	fmt.Printf("--- t:\n%v\n\n", t)

	d, err := yaml.Marshal(&t)
	iferr ! = 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)
	iferr ! = nil { log.Fatalf("error: %v", err)
	}
	fmt.Printf("--- m:\n%v\n\n", m)

	d, err = yaml.Marshal(&m)
	iferr ! = nil { log.Fatalf("error: %v", err)
	}
	fmt.Printf("--- m dump:\n%s\n\n", string(d))
}
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Will have problems:

go: finding module for package gopkg.in/yaml.v2
main.go:7:2: cannot find module providing package gopkg.in/yaml.v2: unrecognized import path "gopkg.in": parse https://gopkg.in/? go-get=1: no go-import meta tags ()Copy the code

The solution

Check out the official document: labix.org/gopkg.in, which states:

The actual implementation of the package is in GitHub:

https://github.com/go-yaml/yaml
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So instead, use

go get github.com/go-yaml/yaml
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Change the import of the official example to:

import (
	"fmt"
	"log"

	"github.com/go-yaml/yaml"
)
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Successful execution:

--- 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

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