name: linux-install

variables:
  - name: version
    value: latest
    required: true
  - name: downloadUrl
  - name: sshPublicKey
    required: true

fodder:
- name: install-egs
  type: shellscript
  content: |
    #!/usr/bin/env python3
    import json
    import os
    import re
    import subprocess
    import urllib.request
    import tarfile

    download_url = '{{ downloadUrl }}'
    if not download_url:
      requested_version = '{{ version }}'
      version = requested_version
      with urllib.request.urlopen('https://releases.dbosoft.eu/eryph/guest-services/index.json') as response:
        response_json = response.read().decode('utf-8')
        product_info = json.loads(response_json)
        if version == 'latest':
          version = product_info.get('stableVersion')
          if not version:
            version = product_info['latestVersion']

        if version == 'prerelease':
          version = product_info['latestVersion']
        
        version_info = product_info['versions'].get(version)
        if not version_info:
          raise Exception(f"Version {requested_version} does not exist")

        file_info = next((f for f in version_info['files'] 
                           if f['filename'].startswith('egs_') 
                           and 'os' in f 
                           and 'arch' in f 
                           and f['os'] == 'linux' 
                           and f['arch'] == 'amd64'), None)
        if not file_info:
          raise Exception(f"No suitable Linux amd64 file found for version {version}")
        download_url = file_info['url']
    
    urllib.request.urlretrieve(download_url, 'egs-linux.tar.gz')
    
    install_path = '/opt/eryph/guest-services'

    os.makedirs(install_path, exist_ok=True)
    with tarfile.open('egs-linux.tar.gz', 'r:gz') as tar:
      tar.extractall(path=install_path)
    os.remove('egs-linux.tar.gz')
    
- name: write-files
  type: cloud-config
  content:
    write_files:
      - path: /etc/systemd/system/eryph-guest-services.service
        content: |
          [Unit]
          Description=eryph guest services

          [Service]
          Type=notify
          ExecStart=/opt/eryph/guest-services/bin/egs-service
          Environment="HOME=/root"
          Restart=on-failure
          RestartSec=10

          [Install]
          WantedBy=multi-user.target
      - path: /etc/opt/eryph/guest-services/id_egs.pub
        content: '{{ sshPublicKey }}'

- name: enable-systemd-unit
  type: shellscript
  content: |
    #!/usr/bin/env bash
    set -euo pipefail
    systemctl daemon-reload
    systemctl enable eryph-guest-services.service
    systemctl start eryph-guest-services.service