How can I generate a Bash script using Go templates with switch and ForEach to iterate through dependencies and output corresponding echo messages based on their type?

Golang Template with Switch & ForEach

This code demonstration focuses on utilizing a template in Go to produce a bash script. The script requires ForEach iteration through dependencies, identifying their types, and outputting corresponding echo messages. A switch statement is implemented to handle the type of each dependency.

package main

import (
    "log"
    "text/template"
    "gopkg.in/yaml.v2"
    "os"
)

type File struct {
    TypeVersion string `yaml:"_type-version"`
    Dependency  []Dependency
}

type Dependency struct {
    Name    string
    Type    string
    CWD     string
    Install []Install
}

type Install map[string]string

var data = `
_type-version: "1.0.0"
dependency:
  - name: ui
    type: runner
    cwd: /ui
    install:
       - name: api

  - name: ui2
    type: runner2
    cwd: /ui2
    install:
       - name: api2

`

func main() {
    f := File{}

    err := yaml.Unmarshal([]byte(data), &f)
    if err != nil {
        log.Fatalf("error: %v", err)
    }

   const t = `
#!/bin/bash

{{range .Dependency}}
echo "type is {{.Type}}"
echo "cwd is {{.CWD}}"
{{range .Install}}
echo "install {{.name}}"
{{end}}
{{end}}
`

    tt := template.Must(template.New("").Parse(t))
    err = tt.Execute(os.Stdout, f)
    if err != nil {
        log.Println("executing template:", err)
    }
}

The provided data is Unmarshalled into a File structure, which is then ready for template execution. This modified code generates a script with:

#!/bin/bash

echo "type is runner"
echo "cwd is /ui"
echo "install api"

echo "type is runner2"
echo "cwd is /ui2"
echo "install api2"

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