Convert AtoM packer template into HCL2

.github/workflows/vagrant-box-atom.yml

@@ -84,10 +84,8 @@ jobs:
     - name: Build
       run: |
         cd ${{ github.workspace }}/packer/templates/vagrant-box-atom
-        packer plugins install github.com/hashicorp/virtualbox
-        packer plugins install github.com/hashicorp/ansible
-        packer plugins install github.com/hashicorp/vagrant
-        packer build -on-error=abort template.json
+        packer init template.json.pkr.hcl
+        packer build -on-error=abort template.json.pkr.hcl
         mv ${{ github.workspace }}/packer/builds/virtualbox/vagrant-atom.box \
           ${{ github.workspace }}/atom-vagrant-${{ github.event.inputs.version }}.box
     - name: Provision a test VM with the new image

packer/templates/vagrant-box-atom/template.json.pkr.hcl

@@ -0,0 +1,60 @@
+packer {
+  required_plugins {
+    ansible = {
+      source  = "github.com/hashicorp/ansible"
+      version = "~> 1"
+    }
+    vagrant = {
+      source  = "github.com/hashicorp/vagrant"
+      version = "~> 1"
+    }
+    virtualbox = {
+      source  = "github.com/hashicorp/virtualbox"
+      version = "~> 1"
+    }
+  }
+}
+
+source "virtualbox-ovf" "ubuntu" {
+  headless         = "true"
+  shutdown_command = "echo 'vagrant' | sudo -S shutdown -P now"
+  source_path      = "../../builds/virtualbox/vagrant-base-ubuntu-20.04-amd64/vagrant-base-ubuntu-20.04-amd64.ovf"
+  ssh_password     = "vagrant"
+  ssh_username     = "vagrant"
+  ssh_wait_timeout = "30s"
+}
+
+build {
+  sources = [
+    "source.virtualbox-ovf.ubuntu"
+  ]
+
+  provisioner "shell" {
+    execute_command = "echo 'vagrant'|{{ .Vars }} sudo -S -E bash '{{ .Path }}'"
+    scripts         = [
+      "../../scripts/ubuntu/ansible.sh"
+    ]
+  }
+
+  provisioner "ansible-local" {
+    extra_arguments = [
+      "--extra-vars=@./host_vars/all"
+    ]
+    galaxy_file     = "requirements.yml"
+    host_vars       = "./provisioning/host_vars/"
+    playbook_file   = "./provisioning/singlenode.yml"
+  }
+
+  provisioner "shell" {
+    execute_command = "echo 'vagrant'|{{ .Vars }} sudo -S -E bash '{{ .Path }}'"
+    scripts         = [
+      "../../scripts/ubuntu/cleanup.sh",
+      "../../scripts/common/minimize.sh"
+    ]
+  }
+
+  post-processor "vagrant" {
+    output               = "../../builds/{{ .Provider }}/vagrant-atom.box"
+    vagrantfile_template = "./Vagrantfile"
+  }
+}