GoLang iterate over yaml file-CodePudding

I wanted to know if this logic is possible in Golang. I have a yaml file as such:

initSteps:
  - "pip install --upgrade pip"
  - "python3 --version"

buildSteps:
  - "pip install ."

runProcess:
  - "python3 test.py"

And am using gopkg.in/yaml.v3 to iterate over the steps. I have a function below that puts the instructions into a map like this:


func init() {

    // add map from yaml to steps
    f, err := ioutil.ReadFile(devrun)

    if err != nil {
        panic(err)
    }
    steps = make(map[interface{}]interface{})

    err2 := yaml.Unmarshal(f, &steps)

    if err2 != nil {
        panic(err2)
    }
}

And in my main function have this to iterate over the values if the key matches:

    for k, v := range steps {
        if k == "initSteps" {
            s := reflect.ValueOf(v)
            for i := 0; i < s.Len(); i   {
                singleVertex := s.Index(i).Elem()
                fmt.Println(singleVertex)
            }
        }
    }

I wanted to see if it was possible to iterate over the key from steps though and how I would go about adding this in. This way I can if k.initSteps: The keys from the yaml file will always be the same with the only thing changing being the steps under them.

CodePudding user response：

You can read your .yaml config file with viper. Simple code example:

import (
    "fmt"
    "github.com/spf13/viper"
)

func main() {
    readYaml()
}

func readYaml() {
    viper.SetConfigName("test")                // name of config file (without extension)
    viper.SetConfigType("yaml")                // REQUIRED if the config file does not have the extension in the name
    viper.AddConfigPath("./Examples/readyaml") // path to look for the config file in

    err := viper.ReadInConfig() // Find and read the config file
    if err != nil {             // Handle errors reading the config file
        panic(fmt.Errorf("fatal error config file: %w", err))
    }
    fmt.Println(viper.AllKeys())
    for _, i := range viper.AllKeys() {
        fmt.Println(i, viper.Get(i))
    }

}

Output:

[initsteps buildsteps runprocess]

initsteps [pip install --upgrade pip python3 --version]

buildsteps [pip install .]

runprocess [python3 test.py]