This is a guide to a typical Git workflow with Citra. It covers forking from the main repository, creating a branch, keeping your branch up to date with the main repository, resolving conflicts, and merging back into the main repository. It's not meant to be a hard-and-fast set of rules. However, if you follow something along these lines, you'll be less likely to piss people off.
It's appreciated if every single commit in a branch on its own compiles on all supported platforms (Windows, Linux, and macOS) and doesn't cause any regressions if the commits after it were left unmerged. We understand that with early development, sometimes it's easier to commit early-and-often, and sometimes you may unintentionally break things (and then later fix them in your branch). If this is part of your workflow, we expect appropriate use of Git rebase to squash broken commits and resolve merge conflicts. If you don't know how Git rebase works, please read this article before developing for Citra.
Terminology
upstream
: Main project repository (https://github.com/citra-emu/citra)origin
: Your GitHub forked project repository (e.g. https://github.com/bunnei/citra)
Before you begin
- GitHub fork the project
- Clone your GitHub fork locally
git clone https://github.com/your-username/citra.git
- Grab the submodules
git submodule update --init --recursive
- Set your
upstream
to the main project repository git remote add upstream https://github.com/citra-emu/citra.git
- Set your Git identity configuration
git config --global user.name "your-username"
git config --global user.email your-email@example.com
Create a new branch
- Create your branch from the latest
upstream/master
(Note: please format-branch-names-like-this) git fetch upstream && git checkout -b new-branch-name upstream/master
- Push your new branch to
origin
(required later for a pull request) git push origin new-branch-name
Scenario A: You did some work in your branch... Then, someone committed something to upstream/master
that you want!
- Make sure you're on your branch
git checkout new-branch-name
- Rebase
upstream/master
onto it. With the rebase, move all of your changes to the top, and put all of the new master changes immediately after where you branched from. The goal should be that the branch now appears as though you just created it fromupstream/master
, and then committed all of your new stuff. git rebase upstream/master
Scenario B: You did some more work in your branch... Then, someone committed something to upstream/master
that will cause conflicts when trying to get the branch merged back to upstream/master!
- From your branch, rebase
upstream/master
git checkout new-branch-name
git rebase -i upstream/master
Your branch is getting near completion, now you're ready for a pull request!
- From your branch, rebase
upstream/master
git checkout new-branch-name
git rebase -i upstream/master
- Update
origin/new-branch-name
git push origin new-branch-name --force
- Create the pull request on GitHub to merge
origin/new-branch-name
intoupstream/master
Gracefully receive feedback from the team
- Address each comment with a commit as needed
Once your pull request is ready to be merged...
- From your branch, interactive rebase to squash all of the new commits (as a result of the pull request feedback) into the commits that they were addressing
git checkout new-branch-name
git rebase -i upstream/master
- Now, you should see a file containing all the commits on this branch.
- For all commits that address feedback, replace
pick
withfixup
. Re order if required (beware, you might get conflicts at this stage! Resolve them carefully, then usegit rebase --continue
) - You can also change commit messages by replacing
pick
withreword
. - Then follow the steps as directed by Git (These are not specific to Citra, so you shouldn't have a problem if you use Git regularly.)
- Rebase complete!
- Update
origin/new-branch-name
git push origin new-branch-name --force
- Merge your branch in
- Always merge using the >merge< button in the GitHub pull request
- If GitHub says the branch cannot be merged automatically, you've likely done something incorrectly (e.g. you did not fully rebase changes from
upstream/master
into your branch). If things don't work for you, don't hesitate to ask us for help @ #citra on freenode or @ #citra-general on Discord. Mastering Git is not as easy as it might sound, but we'll happily help you get started.