{% if s3_grains_url %}
# Sync the grains from S3 if the pillar value exists.
s3_grains_file:
  file:
    - managed
    - name: '/etc/salt/grains'
    - source: '{{ s3_grains_url }}'
    - source_hash: '{{ s3_grains_sha1 }}'
    - user: 'root'
    - group: 'root'
    - mode: 0400

# Inspect the process tree to kill the current salt-call invocation and start a fresh highstate run.
restart_salt_run:
  cmd.run:
    - user: 'root'
    - cwd: '/root'
    - shell: '/bin/bash'
    - name: |
        pkill --signal SIGTERM "[s]alt-call" && \
        salt-call state.highstate > /tmp/grains_reload
    - onchanges:
      - file: '/etc/salt/grains'
{% endif %}