Fun Exercise: Git Collaboration and Feature Toggle Challenge

Table of Contents

• Challenge 1: Three-Way Merge Practice by using git commit and git merge

• Challenge 2: Three-Way Merge Practice by using Pull Request

• Challenge 3: Feature Toggle

• Challenge 4: Tag version

• Challenge 5: Undo Changes

• Challenge 6: Cleanup Branch

Prerequisites

• Git
• Go
  • Mac: brew install go Homebrew or visit Go
  • Windows: choco install go Chocolatey
  • Linux: sudo apt-get install golang-go

Instructions

Step 1: Fork the repository

• Click on the Fork button on the top right corner of this page fork the repository to your own GitHub account

Step 2: Clone the forked repository to your local machine

• Clone the forked repository to your local machine

git clone <your-forked-repository-url>

Challenges

Challenge 1: Three-Way Merge Practice by using git commit and git merge

Guide:

• Create a new branch from the main branch e.g. maithai-feature
• Checkout to the new branch
• Edit the CONTRIBUTORS.md file by adding your name to the Contributors section
• git status to see status of the changes
• git diff to see the changes
• Add the changes to the staging area
• git diff --staged to see the changes in the staging area
• Commit the changes
• Checkout to the main branch
• Merge the new branch to the main branch
• Push the changes to the remote repository at main branch verify by using git log --graph --oneline. You should see the commit history like below:

* commit C (main): Merge branch 'maithai-feature'
|\
| * commit B (maithai-feature): Implement feature Maithai
|/
* commit A: Initial project setup

Hint Challenge 1 (try it your self first before open this hint)

• Create a new branch from the main branch e.g. maithai-feature

git branch maithai-feature

• Checkout to the new branch

git checkout maithai-feature

• Edit the CONTRIBUTORS.md file by adding your name to the Contributors section
• Commit the changes

git add CONTRIBUTORS.md
git commit -m "Add my name to the Contributors section"

• Checkout to the main branch

git checkout main

• Merge the new branch to the main branch

git merge maithai-feature --no-ff

• Push the changes to the remote repository at main branch

git push origin main

Challenge 2: Three-Way Merge Practice by using Pull Request

Guide:

• Create a new branch from the main branch e.g. monkan-feature
• Checkout to the new branch
• Edit the CONTRIBUTORS.md file by adding your name to the Contributors section
• git status to see status of the changes
• git diff to see the changes
• Add the changes to the staging area
• git diff --staged to see the changes in the staging area
• Commit the changes
• Push the changes to the remote repository at the new branch
• Create a Pull Request from the new branch to your main branch (⚠️ Create PR for your repository)
• Merge the Pull Request
• Pull the changes from the remote repository at the main branch
• Verify by using git log --graph --oneline. You should see the commit history like below:

* commit E (HEAD -> main, origin/main): Merge pull request #1 from <your-github-username>/monkan-feature
|\
| * commit C (monkan-feature): Implement feature Monkan
|/
* commit C (main): Merge branch 'maithai-feature'
|\
| * commit B (maithai-feature): Implement feature Maithai
|/
* commit A: Initial project setup

Hint Challenge 2 (try it your self first before open this hint)

• Create a new branch from the main branch e.g. monkan-feature

git branch monkan-feature

• Checkout to the new branch

git checkout monkan-feature

• Edit the CONTRIBUTORS.md file by adding your name to the Contributors section
• Commit the changes

git add CONTRIBUTORS.md
git commit -m "Add my name to the Contributors section"

• Push the changes to the remote repository at the new branch

git push origin monkan-feature

• Create a Pull Request from the new branch to the main branch
• Merge the Pull Request
• Pull the changes from the remote repository at the main branch

git pull origin main

Challenge 3: Feature Toggle

Don't worry if you are not familiar with Go. You can still complete this challenge by following the guide below.

Guide:

• Checkout to the main branch
• Go to challenge3 directory cd challenge-3-feature-toggle directory
• go run main.go or make go-run and verify the result. You should see Sending via SMS.

Email notification feature toggle is DISABLED
Sending SMS to 0812345678: Hello, Go!

• ⚠️ Unable to run the code?
  • Install Go by following the Prerequisites section
  • go version to verify that Go is installed
• Enable the Email feature by changing isEmailEnabled inside the main function to be true
• Verify the result make sure the email notification is sent to the email address that you specified by using make go-run then see the result.
• Commit the changes on the main branch
• Push the changes to the remote repository at the main branch verify by using make go-run. You should see the email notification is sent to the email address that you specified

Email notification feature toggle is ENABLED
Sending email to kbtg@kampus.tech: Hello, Go!

Hint Challenge 3 (try it your self first before open this hint)

• Checkout to the main branch

git checkout main

• Go to challenge3 directory cd challenge-3-feature-toggle directory
• Enable the feature by changing the isEmailEnabled inside the main function to be true
• Verify the result make sure the email notification is sent to the email address that you specified

make go-run

• Commit the changes on the main branch

git add main.go
git commit -m "Enable email notification feature toggle"

• Push the changes to the remote repository at the main branch

git push origin main

Challenge 4: Tag version

Guide:

• Checkout to the main branch
• Create a new tag e.g. v1.0.0
• Push the tag to the remote repository
• Verify by using git tag. You should see the tag that you created or look at the GitHub repository tag section

v1.0.0

Hint Challenge 4 (try it your self first before open this hint)

• Checkout to the main branch

git checkout main

• Create a new tag e.g. v1.0.0

git tag -a v1.0.0 -m "Release version 1.0.0 : send email notification"

• Push the tag to the remote repository

git push origin --tags

Challenge 5: Undo Changes ⏰

Guide:

• Checkout to the main branch
• Show the commit history
• Pick the commit hash that you want to revert
• Revert the commit (Preserve the history)

Hint Challenge 5 (try it your self first before open this hint)

git revert <commit-hash>

Challenge 6: Cleanup Branch 🧹

Guide:

• Delete maithai-feature and monkan-feature branch
• Push the changes to the remote repository

Hint Challenge 6 (try it your self first before open this hint)

git branch -d maithai-feature
git push origin --delete maithai-feature

git branch -d monkan-feature
git push origin --delete monkan-feature