18. Git branches and merge

1. Review presentation

   Practical exercise

2. If necessary, install meld and diffuse tools:

   sudo apt install meld

3. Open your project:

   cd ~/workspace/JTM
4. Add, commit and push changes of your project to the tools.odo.lv (to be sure you have all your previous work on tools.odo.lv).

5. Add new entry to remote repository in your project:

   git remote add upstream ssh://user@tools.odo.lv/home/git/JTM/

   where user is actual username for your own git repository

1. Pull branches branch1 and branch2 from upstream repository to branches into your repository:

   git fetch upstream branch1:branch1
   git fetch upstream branch2:branch2

2. Check that your repository has three branches:

   git branch

   returns:

   branch1
   branch2
   * master
3. Make two copies of your project, for example JTM-1 and JTM-2 as sibling projects in your workspace.

4. Check out branches in copies of the project:

   cd ~/workspace/JTM-1
   git checkout branch1
   cd ~/workspace/JTM-2
   git checkout branch2
5. Open meld, and compare content of your original project, e.g. JTM and JTM-1, copy and save missing parts of content into JTM project.
6. Compare content of catbN.txt files in jtm.activity18 package between projects with master and/or branch1/branch2 branches.
7. Merge content of all numbered filees catbN.txt into single catb.txt file
8. Check that catb.txt file has proper content by running GitMergeTest1.java unit test.

9. Before you add, commit and push changes to tools.odo.lv, ensure you are working on master branch, e.g. command:

   git branch

   returns:

   branch1
   branch2
   * master

Additional info

• A Visual Git Reference
• On undoing, fixing, or removing commits in git
• How to undo (almost) anything with Git