97 lines
2.7 KiB
Markdown
97 lines
2.7 KiB
Markdown
---
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title: How to develop on borgmatic
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---
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## Source code
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To get set up to hack on borgmatic, first clone master via HTTPS or SSH:
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```bash
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git clone https://projects.torsion.org/witten/borgmatic.git
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```
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Or:
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```bash
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git clone ssh://git@projects.torsion.org:3022/witten/borgmatic.git
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```
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Then, install borgmatic
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"[editable](https://pip.pypa.io/en/stable/reference/pip_install/#editable-installs)"
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so that you can run borgmatic commands while you're hacking on them to
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make sure your changes work.
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```bash
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cd borgmatic/
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pip3 install --editable --user .
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```
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Note that this will typically install the borgmatic commands into
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`~/.local/bin`, which may or may not be on your PATH. There are other ways to
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install borgmatic editable as well, for instance into the system Python
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install (so without `--user`, as root), or even into a
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[virtualenv](https://virtualenv.pypa.io/en/stable/). How or where you install
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borgmatic is up to you, but generally an editable install makes development
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and testing easier.
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## Automated tests
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Assuming you've cloned the borgmatic source code as described above, and
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you're in the `borgmatic/` working copy, install tox, which is used for
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setting up testing environments:
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```bash
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pip3 install --user tox
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```
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Finally, to actually run tests, run:
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```bash
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cd borgmatic
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tox
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```
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### Code formatting
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If when running tests, you get an error from the
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[Black](https://black.readthedocs.io/en/stable/) code formatter about files
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that would be reformatted, you can ask Black to format them for you via the
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following:
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```bash
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tox -e black
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```
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### End-to-end tests
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borgmatic additionally includes some end-to-end tests that integration test
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with Borg for a few representative scenarios. These tests don't run by default
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because they're relatively slow and depend on Borg. If you would like to run
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them:
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```bash
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tox -e end-to-end
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```
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## Code style
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Start with [PEP 8](https://www.python.org/dev/peps/pep-0008/). But then, apply
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the following deviations from it:
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* For strings, prefer single quotes over double quotes.
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* Limit all lines to a maximum of 100 characters.
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* Use trailing commas within multiline values or argument lists.
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* For multiline constructs, put opening and closing delimeters on lines
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separate from their contents.
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* Within multiline constructs, use standard four-space indentation. Don't align
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indentation with an opening delimeter.
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borgmatic code uses the [Black](https://black.readthedocs.io/en/stable/) code
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formatter and [Flake8](http://flake8.pycqa.org/en/latest/) code checker, so
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certain code style requirements will be enforced when running automated tests.
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See the Black and Flake8 documentation for more information.
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## Related documentation
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* [Inspect your backups](../../docs/how-to/inspect-your-backups.md)
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