What is git stash?
- git stash is a command in Git that allows you to save your changes without committing them, by creating a temporary "stash".
- Using git stash can be useful when you want to switch branches or perform other actions that require a clean working directory, but you're not ready to commit your changes yet.
- When you run git stash, Git will save your changes to a stash and revert your working directory to the last committed state.
- You can use git stash apply or git stash pop to restore the changes from the stash and reapply them to your working directory when you're ready to continue working on your changes.
- You can customize git stash behaviour using various options and flags, such as specifying a message for the stash or saving only certain files.
What is cherry-pick?
- Cherry-pick is a command in Git that allows you to selectively apply a specific commit or a range of commits from one branch to another.
- This is useful when you want to bring in specific changes from another branch, such as a bug fix or a feature, without merging the entire branch.
- To use cherry-pick, you first need to identify the commit(s) you want to apply using Git commands like git log or git show.
- You can use git cherry-pick followed by the commit hash(es) to apply the changes to your current branch, creating a new commit with the same changes.
- Cherry-pick is a powerful command, but it should be used carefully, especially when cherry-picking a range of commits, as it can introduce conflicts and create divergent histories.

Task 1:

Create a new branch and make some changes to it.
step 1: create a new_branch

step 2: create a file inside it, and add some contents inside the file.
Use git stash to save the changes without committing them.
step 1: After creating the file with some content, add it using git add . command, but don't commit it.

step 2: Now use git stash command, to save the changes, even without committing. Here, deleted dev branch is just a commit message.
Switch to a different branch, make some changes and commit them.
step 1: To switch into another branch use the command git checkout branch_name

step 2: create a file or do some changes in existing file, add it and commit it as shown below.
Use git stash pop to bring the changes back and apply them on top of the new commits.
NOTE: You can see the stash list and pop it even if you are in any other branch.
step 1: Before poping, type git stash list

step 2: Now use the command git stash pop to remove the changes you did earlier.

step 3: After stash pop, if we try to git stash list, we cannot see anything, something like this👇

step 4: Now we can see the commit list using git log and our HEAD is pointing to the latest commit message.

Task 2:

Before committing other messages, dev branch had version01.txt file with only 1 line content.

In version01.txt of development branch add below lines after “This is the bug fix in development branch” that you added in Day10 and reverted to this commit.
Line2>> After bug fixing, this is the new feature with minor alteration

Commit this with message “Added feature2.1 in development branch”
Line3>> This is the advancement of previous feature

Commit this with message “ Added feature2.2 in development branch”
Line4>> Feature 2 is completed and ready for release

Commit this with message “ Feature2 completed”
All these commits messages should be reflected in Production branch too which will come out from Main branch

step 1: First checkout to your main branch

step 2: create a new production branch

step 3: To see the contents of our dev branch in production branch, just use the command git rebase dev

step 4: Type ls to see the contents of production branch in main branch and cat file_name to see the contents within it.

Task 3:

In the Production branch Cherry pick Commit “Added feature2.2 in development branch” and add below lines in it:
Line to be added after Line3>> This is the advancement of previous feature
Line 4>>Added a few more changes to make it more optimized.
Commit: Optimized the feature
step 1: checkout to the production branch, type git log --oneline to see your commit list.

step 2: Type git cherry-pick commit_number

step 3: change the contents of the file.
Before change

After change

step 4: Final step is just to add and commit the message"Optimised the feature".