How do I change the indent of a YAML sequence in goccy/go-yaml?

I have a YAML file which starts out like this:

additional_hostnames: []

I use goccy/go-yaml to parse it and add a new value like this:

    newHostnameNode := ast.String(token.New(hostname, hostname, &token.Position{}))
    additionalHostnames.IsFlowStyle = false
    additionalHostnames.Values = append(additionalHostnames.Values, newHostnameNode)

writing out I get:

additional_hostnames:
                      - foobar

which is really really close to what I wanted which is:

additional_hostnames:
  - foobar

any way to change the indent to be so?

Use the MarshalWithOptions function with Indent and IndentSequence options, e.g.:

package main

import (
    "fmt"
    "github.com/goccy/go-yaml"
)

func main() {
    data := struct {
        Items []string `yaml:"items"`
    }{
        Items: []string{"apple", "banana", "cherry"},
    }

    // Set indentation to 2 spaces.
    yamlData, err := yaml.MarshalWithOptions(data,
        yaml.Indent(2), yaml.IndentSequence(true))
    if err != nil {
        fmt.Println("Error marshaling data:", err)
        return
    }
    fmt.Println(string(yamlData))
}

The code above prints:

items:
  - apple
  - banana
  - cherry

For some reason, goccy/go-yaml has a special extra option, IndentSequence, to control the indentation of arrays and slices. But it automatically indents nested map items using the Indent option only.