In one of the products we’ve worked on, we used ‘git’ for version controlling with GitLab as our hosting provider. In this article, we’re going to discuss hands-on on git as well as the git branching strategies we follow. Along with recommendations on how to use git to accomplish work in a consistent and productive manner.
Git commands
To create a copy of a git repository from the remote source to your local also set the remote to the original source so that you can pull/push on the same repository.
git clone <remote origin=”” url=””></remote>
To create a new branch from an existing branch with preserve the uncommitted/stash changes.
git checkout -b <branch_name></branch_name>
To check all the branch’s revisions in your local system also helps in finding out which branch is currently active.
git branch
To add content from the working directory into the staging area (or “index”) for the next, commit.
git add -p
Create a new commit containing the current contents of the index and the given log message describing the changes
git commit -m <commit message=””></commit>
To publish locally committed changes to origin.
git push origin <branch name=””></branch>
To fetch & merge changes from origin to your local branch.
git pull origin <branch name=””></branch>
To record the current state of the working directory and the index, but want to go back to a clean working directory.
git stash
To list all the recorded index of the working directory/repository.
git stash list
It does the same but leaves it in the stash stack.
git stash pop
To apply the top stashed element to your current working branch/directory and remove it from the stack
git stash apply
To view commit history with SHA for current active branch
git log
To reset the active branch head to a particular commit or branch.
git reset — hard <commit sha=”” branch=”” name=””></commit>
What are the different git branching strategies?
Master branch
This is the main branch of the repository in which we have the latest stable code of production.
General rules:
– Access to direct merge is restricted
– Best practice is to create a CI/CD pipeline to merge code into this branch after deployment is done in Production
– It should always have the latest stable version of production server
– Allow access to only CD tools like Jenkins to make commits to this branch
The master branch should never have unreleased code, i.e., commits made but not yet released).
Integration branch
This is the most important and active branch of the repository from which we make releases to the production server.
General rules:
– Access to direct merge is restricted
– Code is merged into this branch when it becomes eligible for production deployment
– Code in this branch should always be in a deployable state to production
– QA tested code should be into this branch using CI/CD tools
Ideally, the Integration branch should also never have unreleased code, some time on the deployment day when the code is merged a few hours before deployment time.
Staging branch
This is another stable branch of the repository for QA-environment from which we make releases to the QA server.
General rules:
-Access is restricted
-Changes can be submitted only through Pull Requests. No direct commits are allowed
-Should always have the latest stable/released version of QA release server
-It is absolutely necessary to ensure only dev tested and reviewed code gets merged into this branch
Prior to production deployment, all the feature changes must get merged in staging and validated on QA. Once validation is completed, we’ll raise another MR towards the integration branch.
Dev-deploy branch
This branch will be used primarily for deploying on-going development work to the Dev environment. Since multiple teams may work on different features, projects and bugs at the same time, all of them need a Dev environment to test the changes before moving to QA. The idea of the Dev-deploy branch is to merge multiple feature branches to a common branch and deploy the same.
This is so that everyone can use a shared development environment at the same time to validate changes.
Feature deployment
Bugfix deployment
Do’s and Don’ts for your git branching strategy
Dos:
- Make sure to create a new branch for every new feature and bug from staging/integration.
- Frequently commit and push changes to the remote branch to avoid loss of work.
- Include a gitignore file in your project to avoid unwanted files getting committed.
- Ensure that you commit changes with a concise and useful commit message.
- Keep your branch up to date with development branches.
- Make sure to create a MR for merging changes from one branch to another one.
- Conduct a self-review of your code before you create a MR or send it for review to your colleagues.
Don’ts
- Do not ever take pull in your feature branch from Dev deploy branch. People tend to do this while they are resolving conflicts from the Dev deploy branch.
- Never commit directly to the Dev deploy branch.
- Avoid holding up working by failing to commit local branch changes to remote branches. You could end up losing your work if your system crashes.
- Do not work on several features or issues in the same branch. It becomes hard if you need to drop one feature and deploy another feature at any point of time.
- Never reset a branch without committing or stashing your changes. If you do that, you will lose your changes.
- Try not to revert a MR which is already merged.
