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| How to develop on borgmatic |
Source code
To get set up to hack on borgmatic, first clone master via HTTPS or SSH:
git clone https://projects.torsion.org/witten/borgmatic.git
Or:
git clone ssh://git@projects.torsion.org:3022/witten/borgmatic.git
Then, install borgmatic "editable" so that you can run borgmatic commands while you're hacking on them to make sure your changes work.
cd borgmatic/
pip3 install --editable --user .
Note that this will typically install the borgmatic commands into
~/.local/bin, which may or may not be on your PATH. There are other ways to
install borgmatic editable as well, for instance into the system Python
install (so without --user, as root), or even into a
virtualenv. How or where you install
borgmatic is up to you, but generally an editable install makes development
and testing easier.
Automated tests
Assuming you've cloned the borgmatic source code as described above, and
you're in the borgmatic/ working copy, install tox, which is used for
setting up testing environments:
pip3 install --user tox
Finally, to actually run tests, run:
cd borgmatic
tox
Code formatting
If when running tests, you get an error from the Black code formatter about files that would be reformatted, you can ask Black to format them for you via the following:
tox -e black
And if you get a complaint from the isort Python import orderer, you can ask isort to order your imports for you:
tox -e isort
End-to-end tests
borgmatic additionally includes some end-to-end tests that integration test with Borg for a few representative scenarios. These tests don't run by default because they're relatively slow and depend on Borg. If you would like to run them:
tox -e end-to-end
Code style
Start with PEP 8. But then, apply the following deviations from it:
- For strings, prefer single quotes over double quotes.
- Limit all lines to a maximum of 100 characters.
- Use trailing commas within multiline values or argument lists.
- For multiline constructs, put opening and closing delimeters on lines separate from their contents.
- Within multiline constructs, use standard four-space indentation. Don't align indentation with an opening delimeter.
borgmatic code uses the Black code formatter, the Flake8 code checker, and the isort import orderer, so certain code style requirements will be enforced when running automated tests. See the Black, Flake8, and isort documentation for more information.
Continuous integration
Each pull request triggers a continuous integration build which runs the test suite. You can view these builds on build.torsion.org, and they're also linked from the commits list on each pull request.