Brint is a feature gating library without feature flags.
Each feature is associated with a version, and automatically enabled depending on the current module version.

See example/test.py.

pip install brint
python -m example.test

cd brint-py
python setup.py install --user

cd ../brint-cli
cargo install --path .

@brint.feature(..) decorates functions and classes.
You can override an old entity with new one, or the new with the old.

import brint

@brint.feature(name='feature name', version='3.0.0',
    old=<old replacement>,            # optional
    new=<new replacement>,            # optional
    author='@author',                 # optional
    description='might increase CPR', # optional
)

These features can be listed in the command line.

❯ brint

Last
    [0.9.2]
    ..

Current
    [1.0.0]
        new "dark default theme"
            - def default_theme in ./main.py:20
            - def web_default_theme in ./user.py:30

        new "multi-threaded processor"
            - class Processor in ./main.py:50

        obsolete "temporary feature1"
        obsolete "temporary feature2"


Upcoming
    [1.0.1]
    ..

    [1.0.2]
    ..

Pre-release is intentionally ignored when checking the version. Brint will complain about any pre-release in the condition.

@brint.feature('1')  # this featute is included in 1.0.0-alpha.1, 1.0.0-beta, 1.0.0
@brint.feature('1.0.0-beta.1')  # error
@brint.feature('1.0.0+20210101')  # same as '1.0.0'. build metadata is ignored

Feature flags can be defined in Brint.toml.
This is useful for (1) sharing feature flags in a cross-language codebase, and (2) managing feature flags in one place.

[features]
feature-name-1 = "1.0.0"
feature-name-2 = { version = "2", author = "@dev", description = "desc" }

@brint.feature('feature-name-1', new=new_fn)
def old_fn(): ...