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https://github.com/flother/blake.novaextension

A Nova extension to lint your Python source code with Flake8, and format it with Black
https://github.com/flother/blake.novaextension

flake8 linter nova-editor nova-extension python

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A Nova extension to lint your Python source code with Flake8, and format it with Black

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README 

        
Blake: a [Nova](https://nova.app/) extension for linting your Python source code with [Flake8](https://flake8.pycqa.org/), and formatting your code with [Black](https://black.readthedocs.io/).



Blake runs Flake8 when you save a Python file, and reports any warnings and errors in [Nova's issues sidebar](https://library.panic.com/nova/sidebar/). You can also choose to format your code with Black every time you save, or just using the _Editor_ ➞ _Format Source Code with Black_ menu item whenever you wish (shortcut: ⌘⇧B).



# Prerequisites



Before using Blake you need to install Flake8 and Black. The recommended method is to use [Homebrew](https://brew.sh) and [Pipx](https://pipxproject.github.io/pipx/).



1. [Install Homebrew](https://brew.sh)

2. [Install Pipx](https://pipxproject.github.io/pipx/installation/#install-pipx)

3. Install Flake8: `pipx install flake8`

4. Install Black: `pipx install black`



If everything goes to plan, the `flake8` and `black` CLIs will be available globally.



If you do use Pipx to install Flake8 you can later install your favourite [Flake8 plugins](https://github.com/DmytroLitvinov/awesome-flake8-extensions) by [injecting them into the virtual environment](https://pipxproject.github.io/pipx/examples/#pipx-inject-example). For example, to install the [flake8-docstrings](https://gitlab.com/pycqa/flake8-docstrings) plugin: `pipx inject flake8 flake8-docstrings`. The extra warnings and violations provided by the plugin will be immediately and automatically available to both Blake and the `flake8` CLI.



# Installation



You can install Blake from [Nova's online extension library](https://extensions.panic.com/extensions/is.flother/is.flother.Blake/), or you can install it from within Nova itself (select _Extension Library..._ from the _Extensions_ menu and search for "blake").



If you want to install a version for development, clone [the GitHub repo](https://github.com/flother/Blake.novaextension), open the code in Nova, and select _Activate Project as Extension_ from the _Extensions_ menu. Any changes you make to the code will be reflected in the extension for the duration of your Nova session.



# Preferences



By default Flake8 will be run using `/usr/bin/env flake8`, and Black using `/usr/bin/env black`. However you can configure this either for one particular project or for all Python projects within Nova.



- To configure an individual project: select _Project Settings..._ from the _Project_ menu, and look for the Blake environment

- To configure all Python projects: select _Extension Library..._ from the _Extensions_ menu, look for Blake under _Installed Extensions_ in the sidebar, and click _Settings_



An individual project's settings will override the global preferences. Blake's preferences also allow you to:



- Format your source files every time you save (off by default)

- Set preferred maximum line length (default unset, meaning Black decides)

- Use [Black's preview style](https://black.readthedocs.io/en/stable/the_black_code_style/future_style.html#preview-style) (off by default)



For further configuration, you can [configure Flake8](https://flake8.pycqa.org/en/latest/user/configuration.html) and [set your Black preferences](https://black.readthedocs.io/en/stable/usage_and_configuration/the_basics.html#configuration-via-a-file) using the standard config files.