Render Go template to create an Ansible playbook file

render-patch-playbook.go

package main

import (
    "os"
    "text/template"
)

func check(e error) {
    if e != nil { panic(e) }
}

const patch_playbook_template = `- name: "Apply patch | {{ .PatchName }}"
  hosts: "all"
  user: "root"
  gather_facts: "{{ .GatherFacts }}"
  pre_tasks:
    - name: "Ensure /etc/ccp/patch-log exists"
      file:
        state: "directory"
        path: "/etc/ccp/patch-log"
  tasks:
    - name: "__CHANGE_ME__"
  post_tasks:
    - name: "Update the patch log"
      template:
        src: "templates/patch.log.j2"
        dest: "/etc/ccp/patch-log/patch-{{ .PatchLogFilename }}.log"

func main() {
    f, err := os.Create("/tmp/foo.txt")
    check(err)

    t := template.Must(template.New("patch_playbook").Parse(patch_playbook_template))

    patch_data := map[string]interface{}{
        "PatchName": "Fix NFS timeout issue",
        "PatchLogFilename": "fix-nfs-timeout-issue",
        "GatherFacts": "yes",
    }

    err = t.Execute(f, patch_data)
    check(err)
}