修改现有的Yaml文件并添加新数据和注释

I recently saw that the go yaml lib has new version (V3)

with the nodes capabilities (which in my opinion is a killer feature :) ) which can helps a lots with modifying yamls without changing the structure of the file

But since it is fairly new (from last week ) I didn't find some helpful docs and example for the context which I need (add new object/node and to keep the file structure the same without removing the comments etc)

what I need is to manipulate yaml file

for example

lets say I’ve this yaml file

version: 1
type: verbose
kind : bfr

# my list of applications
applications:
  - name: app1
    kind: nodejs
    path: app1
    exec:
      platforms: k8s
      builder: test

Now I got an json object (e.g. with app2) which I need to insert to the existing file

[

    {
        "comment: "Second app",
        "name": "app2",
        "kind": "golang",
        "path": "app2",
        "exec": {
            "platforms": "dockerh",
            "builder": "test"
        }
    }
]

and I need to add it to the yml file after the first application, (applications is array of application)

version: 1
type: verbose
kind : bfr

# my list of applications
applications:

#  First app
  - name: app1
    kind: nodejs
    path: app1
    exec:
      platforms: k8s
      builder: test

# Second app
  - name: app2
    kind: golang
    path: app2
    exec:
      platforms: dockerh
      builder: test

is it possible to add from the yaml file the new json object ? also remove existing

I also found this blog https://blog.ubuntu.com/2019/04/05/api-v3-of-the-yaml-package-for-go-is-available

This is the types which represent the object

type VTS struct {
    version string       `yaml:"version"`
    types   string       `yaml:"type"`
    kind    string       `yaml:"kind,omitempty"`
    apps    Applications `yaml:"applications,omitempty"`
}

type Applications []struct {
    Name string `yaml:"name,omitempty"`
    Kind string `yaml:"kind,omitempty"`
    Path string `yaml:"path,omitempty"`
    Exec struct {
        Platforms string `yaml:"platforms,omitempty"`
        Builder   string `yaml:"builder,omitempty"`
    } `yaml:"exec,omitempty"`
}

update

after testing the solution which is provided by wiil7200 I found 2 issues

I use at the end write it to file err = ioutil.WriteFile("output.yaml", b, 0644)

And the yaml output have 2 issue.

1. The array of the application is starting from the comments, it should start from the name

2. After the name entry the kind property and all others after are not aligned to the name

any idea how to solve those issue ? regard the comments issue, lets say I got it from other property and not from the json (if it make it more simpler)

version: 1
type: verbose
kind: bfr


# my list of applications
applications:
-   #  First app
name: app1
    kind: nodejs
    path: app1
    exec:
        platforms: k8s
        builder: test
-   # test 1
name: app2
    kind: golang
    path: app2
    exec:
        platform: dockerh
        builder: test