m (moved Development/Tutorials/Git/Feature Development Workflow to Archive:Development/Tutorials/Git/Feature Development Workflow)
|This page refers to a draft policy which is still to be agreed and implemented. Please take it as a reference for a work in progress project.|
These tutorials are aimed to get people started with KDE's policy for merging and integrating changes into the repositories.
Such policies vary depending on the developer's role inside the project. Please follow the tutorial which best suits your role and profile
Also, for your knowledge, you should check out these specific articles:
Some KDE Components have adopted an integration-staging-origin policy for pushing features into KDE's repositories. This document is designed to get developers started with this workflow and understand the steps involved.
The following repositories/projects follow these guidelines. Any project not mentioned here is unaffected by what described
The requirements of the KDE community that this workflow aims to meet include the following items. The final workflow may not meet all of the requirements with 100% perfection and there may be some need for compromise on some points as we develop the workflow further. However, these are points of value to the KDE community which need to be addressed by the proposed git workflow:
This approach is meant to implement proper quality evaluation into the main repositories, still allowing developers to work on anything they want, and providing a sane merging strategy which does not require any specific knowledge from the developer's side.
This is achieved by using two separate repositories. One is origin, the official project repository, where just maintainers are allowed to push, apart from special cases. The other is integration, where work in progress happens, and everyone can create branches and work on that.
There are two separate figures: developers and maintainers. Developers are people who want to work on features on a specific repositories, maintainers are the gatekeepers for those repositories. Please note the purpose of the maintainer is purely organizational: no special power over technical decision is given to maintainers.
A developer would provide his code into a remote branch in integration: as soon as this code is ready and reviewed, the maintainer would take care of merging into integration/master first, prepare for staging in integration/staging, and finally merge into master when needed.
In the following tutorial, we'll refer to kdelibs as the main target, but this applies to any other repository using this policy.
To clone the repository, issue
git clone kde:kdelibs
This will create a kdelibs directory containing the whole repository. You now need to add a separate remote for handling integration. A remote is a repository URL, and your local clone can contain multiple repositories to track different branches. To add kdelibs' integration repository, issue inside kdelibs' clone:
git remote add integration kde:clones/kdelibs/dafre/kdelibs-integration
Now, fetch from integration to retrieve the changes:
git fetch integration
|When working with multiple remotes, you can issue git fetch --all to update all the remotes tracked by your local copy|
You now need to get your branches set up, in particular integration/master. In this example, we are creating a new branch named integration-master which would serve for this purpose in particular:
git checkout -b integration-master integration/master
This command creates a local branch set to track a remote one. This branch should be the branch you'll be basing your work upon: origin/master is not meant for development!
It is strongly advised to push your work to integration, but under some circumstances (your work is extremely big in size, you do not have a KDE Development account, etc.), it is allowed to push your branches to a separate personal clone. All work should end up into integration for being reviewed anyway.
We'll now walk through the process needed to develop a new feature. We'll suppose you want to add a button which says "hello" to a specific part of code.
First thing to do is creating a new branch on which to base your work on. This branch must be based upon integration/master. To make sure this happens, start by issuing
git checkout integration-master
Now create your branch. Give it a self-explainatory name: try to keep branches as atomic as possible, and possibly split big changes throughout multiple branches divided as per topic. In our case, we want to name our branch add-hello-button. To do that, we do:
git checkout -b add-hello-button
That will create our personal branch which is going to contain our work. Push your branch to integration by issuing
git push integration add-hello-button
Once you are done with your changes, you are ready to get your branch reviewed. This involves three easy steps:
It is important to have your branch rebased to be ready for review. Rebasing puts your commits on top of anything else of the branch you are rebasing on, including the changes from that branch. You of course want to rebase onto integration/master. To do that, issue
git rebase integration/master
Be sure to fetch before doing that. At this stage, conflicts might occur: be sure to fix them and commit/push the result. You will be required to force push at this stage.
|Rebasing must be done at this stage only: please avoid rebasing before getting reviewed or after getting reviewed if not strictly necessary|
If you have a KDE developer account, simply
git push integration add-hello-button
from within your add-hello-button branch. If you do not have one, please have your mentor push your branch for you.
Use Reviewboard for getting your branch reviewed. You can read KDE Reviewboard+Git tutorial for getting started.
After your branch has been reviewed and marked as "Ship it!" at least by one of the maintainers of the code you are adding features to, your branch is ready for integration and staging. Your reviewer will inform one of the repository's maintainers of that.
Your work is done at this stage: the maintainer will integrate and stage your branch for you, and will merge it into origin according to the project's merging policy. You will be CCMailed upon every separate step your branch will take on its way to origin/master