`meta_package_manager.managers.pkcon` module¶

class meta_package_manager.managers.pkcon.Pkcon[source]¶

Bases: PackageManager

PackageKit’s console client.

pkcon is an unprivileged client handing transactions to the packagekitd daemon over D-Bus, with the distro’s native backend (apt, dnf, zypp, alpm, …) doing the real work. Escalation is polkit’s job, so no operation is marked sudo: under a strict polkit policy, unattended mutations need a policy permitting them without interactive authentication.

Note

pkcon renders packages as a fused name-version.arch (repo) string and never exposes the raw name;version;arch;repo ID. Names and versions both legitimately contain dashes, so the name/version split below anchors on the first dash followed by a digit: a documented heuristic, not an exact science.

Initialize cli_errors list.

name: str = 'PackageKit'¶

Return package manager’s common name.

Default value is based on class name.

homepage_url: str | None = 'https://www.freedesktop.org/software/PackageKit/'¶: Home page of the project, only used in documentation for reference.

logo: str | None = 'freedesktopdotorg'¶

Slug of the brand mark standing for this manager in the documentation.

Names an SVG vendored under docs/assets/managers/, whose provenance and license are recorded in docs/assets/managers/logos.yaml. Inlined at the top of the manager’s page by meta_package_manager._docs; a manager leaving it unset keeps the page’s default package glyph.

Several managers legitimately share one slug, either because they wrap the same upstream (brew and cask) or because the tool has no mark of its own and its ecosystem’s stands in (apt under Debian’s swirl, cargo under Rust’s gear). Documentation-only, like homepage_url: no CLI output reads it.

platforms: frozenset[Platform] | Group | Platform | Iterable[Platform | Group] = frozenset({Platform(id='almalinux', name='AlmaLinux'), Platform(id='alpine', name='Alpine Linux'), Platform(id='altlinux', name='ALT Linux'), Platform(id='amzn', name='Amazon Linux'), Platform(id='android', name='Android'), Platform(id='arch', name='Arch Linux'), Platform(id='buildroot', name='Buildroot'), Platform(id='cachyos', name='CachyOS'), Platform(id='centos', name='CentOS'), Platform(id='chromeos', name='ChromeOS'), Platform(id='clearlinux', name='Clear Linux OS'), Platform(id='cloudlinux', name='CloudLinux OS'), Platform(id='debian', name='Debian'), Platform(id='endeavouros', name='EndeavourOS'), Platform(id='exherbo', name='Exherbo Linux'), Platform(id='fedora', name='Fedora'), Platform(id='generic_linux', name='Generic Linux'), Platform(id='gentoo', name='Gentoo Linux'), Platform(id='guix', name='Guix System'), Platform(id='ibm_powerkvm', name='IBM PowerKVM'), Platform(id='kali', name='Kali Linux'), Platform(id='kvmibm', name='KVM for IBM z Systems'), Platform(id='linuxmint', name='Linux Mint'), Platform(id='mageia', name='Mageia'), Platform(id='mandriva', name='Mandriva Linux'), Platform(id='manjaro', name='Manjaro Linux'), Platform(id='nixos', name='NixOS'), Platform(id='nobara', name='Nobara'), Platform(id='opensuse', name='openSUSE'), Platform(id='openwrt', name='OpenWrt'), Platform(id='oracle', name='Oracle Linux'), Platform(id='parallels', name='Parallels'), Platform(id='pidora', name='Pidora'), Platform(id='pikaos', name='PikaOS'), Platform(id='raspbian', name='Raspbian'), Platform(id='rhel', name='RedHat Enterprise Linux'), Platform(id='rocky', name='Rocky Linux'), Platform(id='scientific', name='Scientific Linux'), Platform(id='slackware', name='Slackware'), Platform(id='sles', name='SUSE Linux Enterprise Server'), Platform(id='slitaz', name='SliTaz GNU/Linux'), Platform(id='sourcemage', name='Source Mage GNU/Linux'), Platform(id='tuxedo', name='Tuxedo OS'), Platform(id='ubuntu', name='Ubuntu'), Platform(id='ultramarine', name='Ultramarine'), Platform(id='void', name='Void Linux'), Platform(id='wsl1', name='Windows Subsystem for Linux v1'), Platform(id='wsl2', name='Windows Subsystem for Linux v2'), Platform(id='xenserver', name='XenServer')})¶

List of platforms supported by the manager.

Allows for a mishmash of platforms and groups of platforms. Will be normalized into a frozenset of Platform instances at instantiation.

requirement: str | None = '>=0.7.0'¶: All the commands and flags used here (--plain, --noninteractive, --filter) are present since PackageKit 0.7.0.

extra_env: ClassVar = {'LC_ALL': 'C'}¶

Additional environment variables to add to the current context.

Automatically applied on each meta_package_manager.execution.CLIExecutor.run_cli() calls.

post_args: tuple[str, ...] = ('--plain',)¶

Global list of options used before and after the invoked package manager CLI.

Automatically added to each meta_package_manager.execution.CLIExecutor.run_cli() call.

Essentially used to force silencing, low verbosity or no-color output.

version_regexes: tuple[str, ...] = ('^(?P<version>[\\d.]+)$',)¶

$ pkcon --version
1.3.6

property installed: Iterator[Package]¶

Fetch installed packages.

$ pkcon get-packages --filter installed --plain
Installed    gzip-1.12-1.fc38.x86_64 (koji-override-0)
Installed    hello-2.12.1-2.fc38.x86_64 (fedora)

property outdated: Iterator[Package]¶

Fetch outdated packages.

Result lines carry the update type as their status word (Security, Bug fix, Enhancement, Normal, …) and the version of the pending update.

Caution

With nothing to update, pkcon prints There are no updates available at this time.``and exits``5``(``PK_EXIT_CODE_NOTHING_USEFUL): a normal empty result, not a failure, so the error recorded for it is discarded.

$ pkcon get-updates --plain
Security     curl-8.0.1-2.fc38.x86_64 (updates)
Normal       hello-2.12.2-1.fc38.x86_64 (updates)

search(query, extended, exact)[source]¶

Fetch matching packages.

$ pkcon search name hello --plain
Available    hello-2.12.1-2.fc38.x86_64 (fedora)
Installed    rubygem-mixlib-shellout-3.2.7-3.fc38.noarch (fedora)

Return type:: Iterator[Package]

install(package_id, version=None)[source]¶

Install one package.

$ pkcon install --noninteractive hello --plain

Return type:: str

cli_names: tuple[str, ...] = ('pkcon',)¶

List of CLI names the package manager is known as.

This list of recognized CLI names is ordered by priority. That way we can influence the search of the right binary.

..hint::: This was helpful in the case of the Python transition from 2.x to 3.x, where multiple versions of the same executable were named python or python3.

By default, this property’s value is derived from the manager’s ID (see the MetaPackageManager.__init__ method above).

id: str = 'pkcon'¶

Package manager’s ID.

Derived by defaults from the lower-cased class name in which underscores _ are replaced by dashes -.

This ID must be unique among all package manager definitions and lower-case, as they’re used as feature flags for the mpm CLI.

upgrade_all_cli()[source]¶

Generates the CLI to upgrade all packages.

Note

With nothing to upgrade this exits 5 (“nothing useful was done”), which the best-effort maintenance flow reports as a failed manager but never as a non-zero mpm exit.

$ pkcon update --noninteractive --plain

Return type:: tuple[str, ...]

virtual: bool = False¶

Should we expose the package manager to the user?

Virtual package manager are just skeleton classes used to factorize code among managers of the same family.

upgrade_one_cli(package_id, version=None)[source]¶

Generates the CLI to upgrade one package.

$ pkcon update --noninteractive hello --plain

Return type:: tuple[str, ...]

remove(package_id)[source]¶

Remove one package.

$ pkcon remove --noninteractive hello --plain

Return type:: str

sync()[source]¶

Refresh the cached repository metadata.

$ pkcon refresh --plain

Return type:: None

meta_package_manager.managers.pkcon module¶

`meta_package_manager.managers.pkcon` module¶