boot.py 0.16

Boot.py is an small set of tools to build simple scripts. Python3 only, and really small: 2Kb!

Install and Use

Install with pip.

pip install boot.py

Create a file and import boot. For example this will install a virtual environment, install requirements, and create some files.

#!/usr/bin/env python3
import os
import venv

from boot import step, run
from pathlib import Path

root_path = Path(__file__).parent.resolve()
venv_dir = root_path / '.venv'

with step(f'Creating virtualenv in {venv_dir.name}'):
    if not venv_dir.exists():
        venv.create(venv_dir, with_pip=True)

with step('Installing requirements'):
    run(f'{venv_dir / "bin/pip"} install -r requirements.txt')

with step('Creating directories'):
    run(f'mkdir -p public/media')
    run(f'mkdir -p public/static')

with step('Environment file'):
    envfile = root_path / '.env'

    if not envfile.exists():
        with open(envfile, 'w') as handle:
            os.chmod(envfile, 0o600)
            handle.write('')

This will output.

$ ./script.py
Creating virtualenv in .venv ... [Ok]
Installing requirements ... [Ok]
Installing project ... [Ok]
Creating directories ... [Ok]
Environment file ... [Ok]

Simple!

You can also compose tasks to decide what to execute and what order.

#!/usr/bin/env python3
import os
import venv

from boot import step, run, task
from pathlib import Path

root_path = Path(__file__).parent.resolve()
venv_dir = root_path / '.venv'


@task
def build(this)
    with step(f'Creating virtualenv in {venv_dir.name}'):
        if not venv_dir.exists():
            venv.create(venv_dir, with_pip=True)

    with step('Creating directories'):
        run(f'mkdir -p public/media')
        run(f'mkdir -p public/static')

    with step('Environment file'):
        envfile = root_path / '.env'

        if not envfile.exists():
            with open(envfile, 'w') as handle:
                os.chmod(envfile, 0o600)
                handle.write('')


@task
def requirements(this)
    with step('Installing requirements'):
        run(f'{venv_dir / "bin/pip"} install -r requirements.txt')


@task
def backup(this)
    with step(f'Backup db'):
        run('pg_dump -d database -f output.sql')


if __name__ == '__main__':
    tasks = {
        'default': build >> requirements,
        'build': build,
        'requirements': requirements,
    }

    if len(sys.argv) == 1:
        if sys.argv[0] in tasks:
            tasks[sys.argv[0]]()
        else:
            print(f'Unknown task: {sys.argv[0]}')
            print(f'Available tasks are: {tasks.keys()}')
    else:
        default()

There are helpers to build scripts with less code, for example we can replace in the code above the main call with a a simple task argument parser:

from boot.cli import ActionsCommand

if __name__ == '__main__':
    ActionsCommand.main(
        default=build >> requirements,
        build=build,
        requirements=requirements,
    }

This parse –help