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#!/usr/bin/env python3

"""
This function is called from lib/upgrade_lts_contract.py and from
lib/reboot_cmds.py

This function should be used after running do-release-upgrade in a machine.
It will detect any contract deltas between the release before
do-release-upgrade and the current release. If we find any differences in
the uaclient contract between those releases, we will apply that difference
in the upgraded release.

For example, suppose we are on Trusty and we are upgrading to Xenial. We found
that the apt url for esm services on trusty:

https://esm.ubuntu.com/ubuntu

While on Xenial, the apt url is:

https://esm.ubuntu.com/infra/ubuntu

This script will detect differences like that and update the Xenial system
to reflect them.
"""

import logging
import sys
import time

from uaclient import contract, defaults, messages, system, util
from uaclient.api.u.pro.status.is_attached.v1 import _is_attached
from uaclient.config import UAConfig

# We consider the past release for LTSs to be the last LTS,
# because we don't have any services available on non-LTS.
# This makes it safer for us to try to process contract deltas.
# For example, we had "jammy": "focal" even when Impish was
# still supported.
current_codename_to_past_codename = {
    "xenial": "trusty",
    "bionic": "xenial",
    "focal": "bionic",
    "jammy": "focal",
    "lunar": "jammy",
    "mantic": "lunar",
}

LOG = logging.getLogger(util.replace_top_level_logger_name(__name__))


def process_contract_delta_after_apt_lock(cfg: UAConfig) -> None:
    LOG.debug("Check whether to upgrade-lts-contract")
    if not _is_attached(cfg).is_attached:
        LOG.debug("Skipping upgrade-lts-contract. Machine is unattached")
        return
    LOG.debug("Starting upgrade-lts-contract.")
    out, _err = system.subp(["lsof", "/var/lib/apt/lists/lock"], rcs=[0, 1])
    if out:
        print(messages.RELEASE_UPGRADE_APT_LOCK_HELD_WILL_WAIT)

    current_release = system.get_release_info().series

    past_release = current_codename_to_past_codename.get(current_release)
    if past_release is None:
        print(
            messages.RELEASE_UPGRADE_NO_PAST_RELEASE.format(
                release=current_release
            )
        )
        LOG.warning(
            "Could not find past release for %s. Current known releases: %r.",
            current_release,
            current_codename_to_past_codename,
        )
        sys.exit(1)

    past_entitlements = UAConfig(
        series=past_release,
    ).machine_token_file.entitlements
    new_entitlements = UAConfig(
        series=current_release,
    ).machine_token_file.entitlements

    retry_count = 0
    while out:
        # Loop until apt hold is released at the end of `do-release-upgrade`
        LOG.debug("Detected that apt lock is held. Sleeping 10 seconds.")
        time.sleep(10)
        out, _err = system.subp(
            ["lsof", "/var/lib/apt/lists/lock"], rcs=[0, 1]
        )
        retry_count += 1

    LOG.debug(
        "upgrade-lts-contract processing contract deltas: %s -> %s",
        past_release,
        current_release,
    )
    print(messages.RELEASE_UPGRADE_STARTING)

    contract.process_entitlements_delta(
        cfg=cfg,
        past_entitlements=past_entitlements,
        new_entitlements=new_entitlements,
        allow_enable=True,
        series_overrides=False,
    )
    LOG.debug("upgrade-lts-contract succeeded after %s retries", retry_count)
    print(messages.RELEASE_UPGRADE_SUCCESS)


def remove_private_esm_apt_cache():
    system.ensure_folder_absent(defaults.ESM_APT_ROOTDIR)

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 0755
api Folder 0755
cli Folder 0755
clouds Folder 0755
daemon Folder 0755
entitlements Folder 0755
files Folder 0755
http Folder 0755
messages Folder 0755
timer Folder 0755
__init__.py File 0 B 0644
actions.py File 8.79 KB 0644
apt.py File 32.73 KB 0644
apt_news.py File 6.54 KB 0644
config.py File 23.1 KB 0644
contract.py File 30.3 KB 0644
contract_data_types.py File 9.89 KB 0644
data_types.py File 10.27 KB 0644
defaults.py File 2.1 KB 0644
event_logger.py File 8.06 KB 0644
exceptions.py File 14.62 KB 0644
gpg.py File 836 B 0644
livepatch.py File 12.51 KB 0644
lock.py File 3.56 KB 0644
log.py File 2.91 KB 0644
security.py File 56.78 KB 0644
security_status.py File 25.25 KB 0644
snap.py File 6.84 KB 0644
status.py File 29.69 KB 0644
system.py File 24.65 KB 0644
types.py File 308 B 0644
upgrade_lts_contract.py File 3.5 KB 0644
util.py File 15.31 KB 0644
version.py File 2.63 KB 0644
yaml.py File 840 B 0644