mirror of
https://github.com/clap-rs/clap
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56 lines
3.4 KiB
Markdown
56 lines
3.4 KiB
Markdown
# How to Contribute
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Contributions are always welcome! Please use the following guidelines when contributing to `clap`
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## Goals
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There are a few goals of `clap` that I'd like to maintain throughout contributions.
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* Remain backwards compatible when possible
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- If backwards compatibility *must* be broken, use deprecation warnings if at all possible before removing legacy code
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- This does not apply for security concerns
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- `clap` officially supports the current stable version of Rust, minus two releases (i.e. if 1.13.0 is current, `clap` must support 1.11.0 and beyond)
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* Parse arguments quickly
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- Parsing of arguments shouldn't slow down usage of the main program
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- This is also true of generating help and usage information (although *slightly* less stringent, as the program is about to exit)
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* Try to be cognizant of memory usage
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- Once parsing is complete, the memory footprint of `clap` should be low since the main program is the star of the show
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* `panic!` on *developer* error, exit gracefully on *end-user* error
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### Commit Messages
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I use a [conventional](https://github.com/ajoslin/conventional-changelog/blob/a5505865ff3dd710cf757f50530e73ef0ca641da/conventions/angular.md) changelog format so I can update my changelog automatically using [clog](https://github.com/clog-tool/clog-cli)
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* Please format your commit subject line using the following format: `TYPE(COMPONENT): MESSAGE` where `TYPE` is one of the following:
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- `api` - An addition to the API
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- `setting` - A new `AppSettings` variant
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- `feat` - A new feature of an existing API
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- `imp` - An improvement to an existing feature/API
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- `perf` - A performance improvement
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- `docs` - Changes to documentation only
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- `tests` - Changes to the testing framework or tests only
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- `fix` - A bug fix
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- `refactor` - Code functionality doesn't change, but underlying structure may
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- `style` - Stylistic changes only, no functionality changes
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- `wip` - A work in progress commit (Should typically be `git rebase`'ed away)
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- `chore` - Catch all or things that have to do with the build system, etc
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- `examples` - Changes to existing example, or a new example
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* The `COMPONENT` is optional, and may be a single file, directory, or logical component. Parenthesis can be omitted if you are opting not to use the `COMPONENT`.
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### Tests and Documentation
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1. Create tests for your changes
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2. **Ensure the tests are passing.** Run the tests (`cargo test --features "yaml unstable"`), alternatively `just run-tests` if you have `just` installed.
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3. **Optional** Run the lints (`cargo build --features lints`) (requires a nightly compiler), alternatively `just lint`
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4. Ensure your changes contain documentation if adding new APIs or features.
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### Preparing the PR
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1. `git rebase` into concise commits and remove `--fixup`s or `wip` commits (`git rebase -i HEAD~NUM` where `NUM` is number of commits back to start the rebase)
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2. Push your changes back to your fork (`git push origin $your-branch`)
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3. Create a pull request against `master`! (You can also create the pull request first, and we'll merge when ready. This a good way to discuss proposed changes.)
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### Other ways to contribute
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Another really great way to help is if you find an interesting, or helpful way in which to use `clap`. You can either add it to the [examples/](../examples) directory, or file an issue and tell me. I'm all about giving credit where credit is due :)
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