Advance Git & GitHub for DevOps Engineers Part-1

Git Branching

Use a branch to isolate development work without affecting other branches in the repository. Each repository has one default branch, and can have multiple other branches. You can merge a branch into another branch using a pull request.
Branches allow you to develop features, fix bugs, or safely experiment with new ideas in a contained area of your repository.

Git Revert and Reset

Two commonly used tools that git users will encounter are those of git reset and git revert.
The benefit of both of these commands is that you can use them to remove or edit changes you’ve made in the code in previous commits.

Git Rebase and Merge

What Is Git Rebase?

Git rebase is a command that lets users integrate changes from one branch to another, and the logs are modified once the action is complete.
Git rebase was developed to overcome merging’s shortcomings, specifically regarding logs.

What Is Git Merge?

Git merge is a command that allows developers to merge Git branches while the logs of commits on branches remain intact.
The merge wording can be confusing because we have two methods of merging branches, and one of those ways is actually called “merge,” even though both procedures do essentially the same thing.

Task-1

Add a text file called version01.txt inside the Devops/Git/ with “This is first feature of our application” written inside. This should be in a branch coming from master, [hint try git checkout -b dev], switch to the dev branch ( Make sure your commit message will reflect as "Added new feature"). [Hint use your knowledge of creating branches and Git commit command]

version01.txt should reflect at the local repo first followed by the Remote repo for review. [Hint use your knowledge of Git push and git pull commands here]
Add a new commit in the dev branch after adding below-mentioned content in Devops/Git/version01.txt: While writing the file make sure you write these lines
1. 1st line>> This is the bug fix in the development branch.
  
  Commit this with the message “ Added feature2 in the development branch”
2. 2nd line>> This is gadbad code.
  
  Commit this with the message “ Added feature3 in the development branch"
3. 3rd line>> This feature will gadbad everything from now.
  
  Commit with the message “ Added feature4 in the development branch"
Restore the file to a previous version where the content should be “This is the bug fix in the development branch” [Hint use git revert or reset according to your knowledge]
1. git revert should be used to undo changes on a public branch whereas git reset should be reserved for undoing changes on a private branch.
2. git revert is a powerful command that removes the last version (created) and comes to the previous version commit stage whereas git reset helps to set back in untracked stages of a particular commit.

Task-2

Demonstrate the concept of branches with 2 or more branches with a screenshot.
add some changes to dev branch and merge that branch in master
Let's try for rebase too, and see what difference you get.

Rebase is used to bring all branches in one linear way as we can see here in contrast with Merge where it merges only a particular branch not all at once.

That's all.