text: #!/usr/bin/env python
  
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import os
  import yaml
  
  from jinja2 import pass_context
  
  
  def debian_package_install(packages, clean_package_cache=True):
      """Jinja utility method for building debian-based package install command.
  
      apt-get is not capable of installing .deb files from a URL and the
      template logic to construct a series of steps to install regular packages
      from apt repos as well as .deb files that need to be downloaded, manually
      installed, and cleaned up is complicated. This method will construct the
      proper string required to install all packages in a way that's a bit
      easier to follow.
  
      :param packages: a list of strings that are either packages to install
      from an apt repo, or URLs to .deb files
      :type packages: list
  
      :returns: string suitable to provide to RUN command in a Dockerfile that
      will install the given packages
      :rtype: string
      """
      cmds = []
  
      # divide the list into two groups, one for regular packages and one for
      # URL packages
      reg_packages, url_packages = [], []
      for package in packages:
          if package.startswith('http'):
              url_packages.append(package)
          else:
              reg_packages.append(package)
  
      # handle the apt-get install
      if reg_packages:
          cmds.append('apt-get --error-on=any update')
          cmds.append('apt-get -y install --no-install-recommends {}'.format(
              ' '.join(reg_packages)
          ))
          if clean_package_cache:
              cmds.append('apt-get clean')
              cmds.append('rm -rf /var/lib/apt/lists/*')
  
      # handle URL packages
      for url in url_packages:
          # the path portion should be the file name
          name = url[url.rfind('/') + 1:]
          cmds.extend([
              'curl --location {} -o {}'.format(url, name),
              'dpkg -i {}'.format(name),
              'rm -rf {}'.format(name),
          ])
  
      # return the list of commands
      return ' && '.join(cmds)
  
  
  @pass_context
  def handle_repos(context, reponames, mode):
      """NOTE(hrw): we need to handle CentOS, Debian and Ubuntu with one macro.
  
      Repo names have to be simple names mapped to proper ones.  So 'ceph' ==
      'centos-ceph-pacific' for CentOS, UCA for Ubuntu (enabled by default) and
      something else for Debian.
      Distro/arch are not required to have all entries - we ignore missing ones.
      """
  
      if mode == 'enable':
          rpm_switch = '--enable'
      elif mode == 'disable':
          rpm_switch = '--disable'
      else:
          raise KeyError
  
      if not isinstance(reponames, list):
          raise TypeError("First argument should be a list of repositories")
  
      if context.get('repos_yaml'):
          repofile = context.get('repos_yaml')
      else:
          repofile = os.path.dirname(os.path.realpath(__file__)) + '/repos.yaml'
  
      with open(repofile, 'r') as repos_file:
          repo_data = {}
          for name, params in yaml.safe_load(repos_file).items():
              repo_data[name] = params
  
      base_package_type = context.get('base_package_type')
      base_distro = context.get('base_distro')
      base_arch = context.get('base_arch')
  
      commands = ''
  
      try:
          repo_list = repo_data['%s-%s' % (base_distro, base_arch)]
      except KeyError:
          # NOTE(hrw): Fallback to distro list
          repo_list = repo_data[base_distro]
  
      for repo in reponames:
          try:
              if base_package_type == 'rpm':
                  commands += ' %s %s' % (rpm_switch, repo_list[repo])
              elif base_package_type == 'deb':
                  if mode == 'enable':
                      commands += f"""echo 'Uris: {repo_list[repo]['url']}' \
  >/etc/apt/sources.list.d/{repo}.sources \
  && echo 'Components: {repo_list[repo]['component']}' \
  >>/etc/apt/sources.list.d/{repo}.sources \
  && echo 'Types: deb' >>/etc/apt/sources.list.d/{repo}.sources \
  && echo 'Suites: {repo_list[repo]['suite']}' \
  >>/etc/apt/sources.list.d/{repo}.sources \
  && echo 'Signed-By: /etc/kolla/apt-keys/{repo_list[repo]['gpg_key']}' \
  >>/etc/apt/sources.list.d/{repo}.sources \
  && """
          except KeyError:
              # NOTE(hrw): we ignore missing repositories for a given
              # distro/arch
              pass
  
      if base_package_type == 'rpm' and commands:
          # NOTE(hrw): if commands is empty then no repos are enabled
          # otherwise we need to add command to handle repositories
          # NOTE(hrw) dnf errors out if we enable unknown repo
          commands = 'dnf config-manager %s || true' % commands
      elif base_package_type == 'deb':
          # NOTE(hrw): Debian commands end with '&&'
          commands = commands[0:-4]
  
      if commands:
          commands = "RUN %s" % commands
  
      return commands
  