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# Contributing to nix
We're really glad you're interested in contributing to nix! This
document has a few pointers and guidelines to help get you started.
To have a welcoming and inclusive project, nix uses the Rust project's
[Code of Conduct][conduct]. All contributors are expected to follow it.
[conduct]: https://www.rust-lang.org/conduct.html
# Issues
We use GitHub's [issue tracker][issues].
[issues]: https://github.com/nix-rust/nix/issues
## Bug reports
Before submitting a new bug report, please [search existing
issues][issue-search] to see if there's something related. If not, just
[open a new issue][new-issue]!
As a reminder, the more information you can give in your issue, the
easier it is to figure out how to fix it. For nix, this will likely
include the OS and version, and the architecture.
[issue-search]: https://github.com/nix-rust/nix/search?utf8=%E2%9C%93&q=is%3Aissue&type=Issues
[new-issue]: https://github.com/nix-rust/nix/issues/new
## Feature / API requests
If you'd like a new API or feature added, please [open a new
issue][new-issue] requesting it. As with reporting a bug, the more
information you can provide, the better.
## Labels
We use labels to help manage issues. The structure is modeled after
[Rust's issue labeling scheme][rust-labels]:
- **A-** prefixed labels state which area of the project the issue
relates to
- **E-** prefixed labels explain the level of experience necessary to fix the
issue
- **O-** prefixed labels specify the OS for issues that are OS-specific
- **R-** prefixed labels specify the architecture for issues that are
architecture-specific
[rust-labels]: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#issue-triage
# Pull requests
GitHub pull requests are the primary mechanism we use to change nix. GitHub itself has
some [great documentation][pr-docs] on using the Pull Request feature. We use the 'fork and
pull' model described there.
Please make pull requests against the `master` branch.
If you change the API by way of adding, removing or changing something or if
you fix a bug, please add an appropriate note to the [change log][cl]. We
follow the conventions of [Keep A CHANGELOG][kacl].
[cl]: https://github.com/nix-rust/nix/blob/master/CHANGELOG.md
[kacl]: https://github.com/olivierlacan/keep-a-changelog/tree/18adb5f5be7a898d046f6a4acb93e39dcf40c4ad
[pr-docs]: https://help.github.com/articles/using-pull-requests/
## Testing
nix has a test suite that you can run with `cargo test`. Ideally, we'd like pull
requests to include tests where they make sense. For example, when fixing a bug,
add a test that would have failed without the fix.
After you've made your change, make sure the tests pass in your development
environment. We also have [continuous integration set up on
Cirrus-CI][cirrus-ci], which might find some issues on other platforms. The CI
will run once you open a pull request.
There is also infrastructure for running tests for other targets
locally. More information is available in the [CI Readme][ci-readme].
[cirrus-ci]: https://cirrus-ci.com/github/nix-rust/nix
[ci-readme]: ci/README.md
### Disabling a test in the CI environment
Sometimes there are features that cannot be tested in the CI environment.
To stop a test from running under CI, add `skip_if_cirrus!()` to it. Please
describe the reason it shouldn't run under CI, and a link to an issue if
possible!
## bors, the bot who merges all the PRs
All pull requests are merged via [bors], an integration bot. After the
pull request has been reviewed, the reviewer will leave a comment like
> bors r+
to let bors know that it was approved. Then bors will check that it passes
tests when merged with the latest changes in the `master` branch, and
merge if the tests succeed.
[bors]: https://bors-ng.github.io/
## API conventions
If you're adding a new API, we have a [document with
conventions][conventions] to use throughout the nix project.
[conventions]: https://github.com/nix-rust/nix/blob/master/CONVENTIONS.md
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