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CONTRIBUTING.md: Minor fixes

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Silvan Mosberger 2023-08-14 02:46:50 +02:00
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CONTRIBUTING.md
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@ -28,11 +28,13 @@ This section describes in some detail how changes can be made and proposed with
1. [Clone the forked repository](https://docs.github.com/en/get-started/quickstart/fork-a-repo#cloning-your-forked-repository) into a local `nixpkgs` directory.
1. [Configure the upstream Nixpkgs repository](https://docs.github.com/en/get-started/quickstart/fork-a-repo#configuring-git-to-sync-your-fork-with-the-upstream-repository).
1. Create and switch to a new Git branch, ideally such that:
1. Figure out the branch that should be used for this change by going through [this section][branch].
If in doubt use `master`, that's where most changes should go.
This can be changed later by [rebasing][rebasing].
2. Create and switch to a new Git branch, ideally such that:
- The name of the branch hints at the change you'd like to implement, e.g. `update-hello`.
- The base of the branch includes the most recent changes on the `master` branch.
> **Note**
> Depending on the change you may want to use a different branch, see [][branch].
- The base of the branch includes the most recent changes on the base branch from step 1, we'll assume `master` here.
```bash
# Make sure you have the latest changes from upstream Nixpkgs
@ -52,7 +54,7 @@ This section describes in some detail how changes can be made and proposed with
git switch --create update-hello <the desired base commit>
```
2. Make the desired changes in the local Nixpkgs repository using an editor of your choice.
3. Make the desired changes in the local Nixpkgs repository using an editor of your choice.
Make sure to:
- Adhere to both the [general code conventions](#code-conventions), and the code conventions specific to the part you're making changes to.
See the [overview section](#overview) for more specific information.
@ -61,13 +63,13 @@ This section describes in some detail how changes can be made and proposed with
- If necessary, document the change.
See the [overview section](#overview) for more specific information.
3. Commit your changes using `git commit`.
4. Commit your changes using `git commit`.
Make sure to adhere to the [commit conventions](#commit-conventions).
Repeat the steps 2 and 3 as many times as necessary.
Repeat the steps 3-4 as many times as necessary.
Advance to the next step if all the commits (viewable with `git log`) make sense together.
4. Push your commits to your fork of Nixpkgs.
5. Push your commits to your fork of Nixpkgs.
```
git push --set-upstream origin HEAD
```
@ -78,33 +80,32 @@ This section describes in some detail how changes can be made and proposed with
remote: https://github.com/myUser/nixpkgs/pull/new/update-hello
```
5. [Create a pull request](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request#creating-the-pull-request) from the new branch in your Nixpkgs fork to the upstream Nixpkgs repository.
Generally you should use `master` as the pull requests base branch.
See <!-- TODO branch section link --> for when a different branch should be used instead.
Make sure to go through the [pull request template](#pull-request-template) in the pre-filled default description.
6. [Create a pull request](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request#creating-the-pull-request) from the new branch in your Nixpkgs fork to the upstream Nixpkgs repository.
Use the branch from step 2 as the pull requests base branch, you can change this later by [rebasing][rebasing] if necessary.
Go through the [pull request template](#pull-request-template) in the pre-filled default description.
6. Respond to review comments, potential CI failures and potential merge conflicts by updating the pull request.
7. Respond to review comments, potential CI failures and potential merge conflicts by updating the pull request.
Always keep the pull request in a mergeable state.
To add new commits, repeat steps 2-3 and push the result using
```
git push
```
- To add new commits, repeat steps 3-4 and push the result using
```
git push
```
To change existing commits you will have to [rewrite Git history](https://git-scm.com/book/en/v2/Git-Tools-Rewriting-History).
Useful Git commands that can help a lot with this are `git commit --patch --amend` and `git rebase --interactive`.
With a rewritten history you need to force-push the commits using
```
git push --force-with-lease
```
- To change existing commits you will have to [rewrite Git history](https://git-scm.com/book/en/v2/Git-Tools-Rewriting-History).
Useful Git commands that can help a lot with this are `git commit --patch --amend` and `git rebase --interactive`.
With a rewritten history you need to force-push the commits using
```
git push --force-with-lease
```
In case of merge conflicts you will also have to [rebase the branch](https://git-scm.com/book/en/v2/Git-Branching-Rebasing) on top of current `master`.
Sometimes this can be done [on GitHub directly](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/keeping-your-pull-request-in-sync-with-the-base-branch#updating-your-pull-request-branch), but if not you will have to rebase locally using
```
git fetch upstream
git rebase upstream/master
git push --force-with-lease
```
- In case of merge conflicts you will also have to [rebase the branch](https://git-scm.com/book/en/v2/Git-Branching-Rebasing) on top of current `master`.
Sometimes this can be done [on GitHub directly](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/keeping-your-pull-request-in-sync-with-the-base-branch#updating-your-pull-request-branch), but if not you will have to rebase locally using
```
git fetch upstream
git rebase upstream/master
git push --force-with-lease
```
### Which branch to use
[branch]: #which-branch-to-use
@ -155,6 +156,7 @@ As a rule of thumb, if the number of rebuilds is **over 500**, it can be conside
To get a sense for what changes are considered mass rebuilds, see [previously merged pull requests to the staging branches](https://github.com/NixOS/nixpkgs/issues?q=base%3Astaging+-base%3Astaging-next+is%3Amerged).
### Rebasing between branches (i.e. from master to staging)
[rebasing]: #rebasing-between-branches-ie-from-master-to-staging
From time to time, changes between branches must be rebased, for example, if the
number of new rebuilds they would cause is too large for the target branch. When
@ -270,7 +272,7 @@ To manually create a backport pull request, follow [the standard pull request pr
- Instead of making manually making and committing the changes, use [`git cherry-pick -x`](https://git-scm.com/docs/git-cherry-pick) for each commit from the pull request you'd like to backport.
Either `git cherry-pick -x <commit>` when the reason for the backport is obvious (such as minor versions, fixes, etc.), otherwise use `git cherry-pickx -xe <commit>` to add a reason for the backport to the commit message.
Here is [an example](5688c39af5a6c5f3d646343443683da880eaefb8) of this.
Here is [an example](https://github.com/nixos/nixpkgs/commit/5688c39af5a6c5f3d646343443683da880eaefb8) of this.
> **Warning**
> Ensure the commits exists on the master branch.