packer-template.json

{
  "variables": {
    "jdk_version": "7",
    "build_target": "tulip_chiphd_atv-userdebug",
    "manifest": "android-6.0.1_r74",
    "variant": "marshmallow",

    "do_api_token": "{{env `DIGITALOCEAN_API_TOKEN`}}",
    "do_region": "ams2",
    "do_size": "8gb",
  },

  "builders": [{
    "type": "digitalocean",
    "api_token": "{{user `do_api_token`}}",
    "size": "{{user `do_size`}}",
    "region": "{{user `do_region`}}",
    "image": "ubuntu-16-04-x64",
    "droplet_name": "{{user `manifest`}}-pine64-build-env",
    "snapshot_name": "{{user `manifest`}}-pine64-build-env-{{timestamp}}",
    "state_timeout": "180m"
  }, {
    "type": "docker",
    "image": "ubuntu:xenial",
    "privileged": true,
    "commit": true
  }],

  "provisioners": [{
    "type": "shell",
    "script": "packer-template-script.sh",
    "environment_vars": [
      "JDK_VERSION={{user `jdk_version`}}",
      "BUILD_TARGET={{user `build_target`}}",
      "MANIFEST={{user `manifest`}}",
      "VARIANT={{user `variant`}}"
    ]
  }]
}