nixpkgs/CONTRIBUTING.md
2015-06-21 14:38:20 +02:00

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# How to contribute
## Opening issues
* Make sure you have a [GitHub account](https://github.com/signup/free)
* [Submit an issue](https://github.com/NixOS/nixpkgs/issues) - assuming one does not already exist
* Clearly describe the issue including steps to reproduce when it is a bug
* Include information what version of nixpkgs and Nix are you using (nixos-version or git revision)
## Making patches
* Read [Manual (How to write packages for Nix)](https://nixos.org/nixpkgs/manual/)
* Fork the repository on GitHub.
* Create a branch for your future fix.
* You can make branch from a commit of your local `nixos-version`. That will help you to avoid additional local compilations. Because you will recieve packages from binary cache.
* For example: `nixos-version` returns `15.05.git.0998212 (Dingo)`. So you can do:
```bash
git checkout 0998212
git checkout -b 'fix/pkg-name-update'
```
* Please avoid working directly on the `master` branch.
* Make commits of logical units.
* If you removed pkgs, made some major NixOS changes etc., write about them in `nixos/doc/manual/release-notes/rl-unstable.xml`.
* Check for unnecessary whitespace with `git diff --check` before committing.
* Format the commit in a following way:
```
(pkg-name | service-name): (from -> to | init at version | refactor | etc)
Additional information.
```
* Examples:
* `nginx: init at 2.0.1`
* `firefox: 3.0 -> 3.1.1`
* `hydra service: add bazBaz option`
* `nginx service: refactor config generation`
* Test your changes. If you work with
a) nixpkgs
* update pkg ->
* `nix-env -i pkg-name -f <path to your local nixpkgs folder>`
* add pkg ->
* Make sure it's in `pkgs/top-level/all-packages.nix`
* `nix-env -i pkg-name -f <path to your local nixpkgs folder>`
* _If you don't want to install pkg in you profile_.
* `nix-build -A pkg-attribute-name <path to your local nixpkgs folder>/default.nix` and check results in the folder `result`. It will appear in the same directory where you did `nix-build`.
* If you did `nix-env -i pkg-name` you can do `nix-env -e pkg-name` to uninstall it from your system.
b) NixOS and its modules
* You can add new module to your NixOS configuration file (usually it's `/etc/nixos/configuration.nix`.
And do `sudo nixos-rebuild test -I nixpkgs=<path to your local nixpkgs folder> --fast`
* If you have commits `pkg-name: oh, forgot to insert whitespace`: squash commits in this case. Use `git rebase -i`.
* Rebase you branch against current `master`.
## Submitting changes
* Push your changes to your fork of nixpkgs.
* Create pull request.
* Write the title in format `(pkg-name | service): improvement`
* If you update the pkg, write versions `from -> to`
* Write in comment if you have tested your patch. Do not rely much on `TravisCI`.
* If you make an improvement, write about your motivation
* Notify maintainers of the package. For example add to the message: `cc @jagajaga @domenkozar`
## Hotfixing pull requests
* Make the appropriate changes in you branch
* Don't create additional commits
* `git rebase`
* `git push --force` to your branch