meta_package_manager.bar_plugin package

Xbar and SwiftBar plugin for Meta Package Manager (i.e. the mpm CLI).

Default update cycle should be set to several hours so we have a chance to get user’s attention once a day. Higher frequency might ruin the system as all checks are quite resource intensive, and Homebrew might hit GitHub’s API calls quota.

• Xbar automatically bridge plugin options between its UI and environment variable on script execution.

• This is in progress for SwiftBar.

meta_package_manager.bar_plugin.PYTHON_MIN_VERSION = (3, 8, 0)

Minimal requirement is aligned to mpm.

meta_package_manager.bar_plugin.MPM_MIN_VERSION = (5, 0, 0)

Mpm v5.0.0 was the first version taking care of the complete layout rendering.

class meta_package_manager.bar_plugin.Venv(value, names=<not given>, *values, module=None, qualname=None, type=None, start=1, boundary=None)

Bases: Enum

Type of virtualenv we are capable of detecting.

PIPENV = 1

POETRY = 2

VIRTUALENV = 3

class meta_package_manager.bar_plugin.MPMPlugin

Bases: object

Implements the minimal code necessary to locate and call the mpm CLI on the system.

Once mpm is located, we can rely on it to produce the main output of the plugin.

The output must supports both Xbar dialect and SwiftBar dialect.

static getenv_str(var, default=None)

Utility to get environment variables.

Note that all environment variables are strings. Always returns a lowered-case string.

Return type:

str | None

static getenv_bool(var, default=False)

Utility to normalize boolean environment variables.

Relies on configparser.RawConfigParser.BOOLEAN_STATES to translate strings into boolean. See: https://github.com/python/cpython/blob/89192c4/Lib/configparser.py#L597-L599

Return type:

bool

static normalize_params(font_string, valid_ids=None)

Return type:

str

static v_to_str(version_tuple)

Transforms into a string a tuple of integers representing a version.

Return type:

str

property table_rendering: bool

Aligns package names and versions, like a table, for easier visual parsing.

If True, will aligns all items using a fixed-width font.

property default_font: str

Make it easier to change font, sizes and colors of the output.

property monospace_font: str

Make it easier to change font, sizes and colors of the output.

property error_font: str

Error font is based on monospace font.

property is_swiftbar: bool

SwiftBar is kind enough to tell us about its presence.

property all_pythons: list[str]

Search for any Python on the system.

Returns a generator of normalized and deduplicated Path to Python binaries.

Filters out old Python interpreters.

We first try to locate Python by respecting the environment variables as-is, i.e. as defined by the user. Then we return the Python interpreter used to execute this script.

TODO: try to tweak the env vars to look for homebrew location etc?

static search_venv(folder)

Search for signs of a virtual env in the provided folder.

Returns the type of the detected venv and CLI arguments that can be used to run a command from the virtualenv context.

Returns (None, None) if the folder is not a venv.

Return type:

tuple[Venv, tuple[str, ...]] | None

search_mpm()

Iterare over possible CLI commands to execute mpm.

Should be able to produce the full spectrum of alternative commands we can use to invoke mpm over different context.

The order in which the candidates are returned by this method is conserved by the ranked_mpm() method below.

We prioritize venv-based findings first, as they’re more likely to have all dependencies installed and sorted out. They’re also our prime candidates in unittests.

Then we search for system-wide installation. And finally Python modules.

Return type:

Generator[tuple[str, ...], None, None]

check_mpm(mpm_cli_args)

Test-run mpm execution and extract its version.

Return type:

tuple[bool, bool, tuple[int, ...] | None, str | Exception | None]

property ranked_mpm: list[tuple[tuple[str, ...], bool, bool, tuple[int, ...] | None, str | Exception | None]]

Rank the mpm candidates we found on the system.

Sort them by: - runnability - up-to-date status - version number - error

On tie, the order from search_mpm is respected.

property best_mpm: tuple[tuple[str, ...], bool, bool, tuple[int, ...] | None, str | Exception | None]

static pp(label, *args)

Print one menu-line with the Xbar/SwiftBar dialect.

First argument is the menu-line label, separated by a pipe to all other non- empty parameters, themselves separated by a space.

Skip printing of the line if label is empty.

Return type:

None

static print_error_header()

Generic header for blocking error.

Return type:

None

print_error(message, submenu='')

Print a formatted error message line by line.

A red, fixed-width font is used to preserve traceback and exception layout. For compactness, the block message is dedented and empty lines are skipped.

Message is always casted to a string as we allow passing of exception objects and have them rendered.

Return type:

None

print_menu()

Print the main menu.

Return type:

None

Submodules

meta_package_manager.bar_plugin.meta_package_manager module