docs: Add code style guide

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# Contributing guide
This page is about contributing to Continuwuity. The
[development](./development.md) page may be of interest for you as well.
[development](./development.md) and [code style guide](./development/code_style.md) pages may be of interest for you as well.
If you would like to work on an [issue][issues] that is not assigned, preferably
ask in the Matrix room first at [#continuwuity:continuwuity.org][continuwuity-matrix],
and comment on it.
### Linting and Formatting
### Code Style
It is mandatory all your changes satisfy the lints (clippy, rustc, rustdoc, etc)
and your code is formatted via the **nightly** rustfmt (`cargo +nightly fmt`). A lot of the
`rustfmt.toml` features depend on nightly toolchain. It would be ideal if they
weren't nightly-exclusive features, but they currently still are. CI's rustfmt
uses nightly.
If you need to allow a lint, please make sure it's either obvious as to why
(e.g. clippy saying redundant clone but it's actually required) or it has a
comment saying why. Do not write inefficient code for the sake of satisfying
lints. If a lint is wrong and provides a more inefficient solution or
suggestion, allow the lint and mention that in a comment.
If there is a large formatting change across unrelated files, make a separate commit so that it can be added to the `.git-blame-ignore-revs` file.
Please review and follow the [code style guide](./development/code_style.md) for formatting, linting, naming conventions, and other code standards.
### Pre-commit Checks
@ -66,7 +54,7 @@ pre-commit install
pre-commit run --all-files
```
These same checks are run in CI via the prefligit-checks workflow to ensure consistency.
These same checks are run in CI via the prefligit-checks workflow to ensure consistency. These must pass before the PR is merged.
### Running tests locally
@ -115,37 +103,13 @@ To build the documentation locally:
The output of the mdbook generation is in `public/`. You can open the HTML files directly in your browser without needing a web server.
### Inclusivity and Diversity
All **MUST** code and write with inclusivity and diversity in mind. See the
[following page by Google on writing inclusive code and
documentation](https://developers.google.com/style/inclusive-documentation).
This **EXPLICITLY** forbids usage of terms like "blacklist"/"whitelist" and
"master"/"slave", [forbids gender-specific words and
phrases](https://developers.google.com/style/pronouns#gender-neutral-pronouns),
forbids ableist language like "sanity-check", "cripple", or "insane", and
forbids culture-specific language (e.g. US-only holidays or cultures).
No exceptions are allowed. Dependencies that may use these terms are allowed but
[do not replicate the name in your functions or
variables](https://developers.google.com/style/inclusive-documentation#write-around).
In addition to language, write and code with the user experience in mind. This
is software that intends to be used by everyone, so make it easy and comfortable
for everyone to use. 🏳️‍⚧️
### Variable, comment, function, etc standards
Rust's default style and standards with regards to [function names, variable
names, comments](https://rust-lang.github.io/api-guidelines/naming.html), etc
applies here.
### Commit Messages
Continuwuity follows the [Conventional Commits](https://www.conventionalcommits.org/) specification for commit messages. This provides a standardized format that makes the commit history more readable and enables automated tools to generate changelogs.
The basic structure is:
```
<type>[(optional scope)]: <description>
@ -186,11 +150,10 @@ of it, especially when the CI completed successfully and everything so it
Before submitting a pull request, please ensure:
1. Your code passes all CI checks (formatting, linting, typo detection, etc.)
2. Your commit messages follow the conventional commits format
3. Tests are added for new functionality
4. Documentation is updated if needed
2. Your code follows the [code style guide](./development/code_style.md)
3. Your commit messages follow the conventional commits format
4. Tests are added for new functionality
5. Documentation is updated if needed
Direct all PRs/MRs to the `main` branch.