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centralized-workflow-exercise

Exercise to practice collaborative centralized workflow. On the way to a pull request and code review we will meet and discuss a number of typical pitfalls.

Before we start

  1. Participants add their usernames to a shared document.
  2. Instructor adds participants as collaborators to this project.

After participants have been added as collaborators

1. Clone this repository

If you have set up ssh keys:

$ git clone [email protected]:coderefinery/centralized-workflow-exercise.git

If you have not set up ssh keys:

$ git clone https://github.com/coderefinery/centralized-workflow-exercise.git

2. Step into the newly created directory:

$ cd centralized-workflow-exercise

3. Create a file with a unique name, e.g.: yourusername.txt

In this file share your favourite cooking recipe or haiku or Git trick or whatever.

4. Stage and commit the change

$ git add yourusername.txt
$ git commit

5. Try to push the change to the upstream repository

$ git push origin master

6. Stop here and discuss why push for most participants was rejected

It will work only for one participant. Why?

7. Pull updates from the upstream repository

$ git pull origin master

8. Stop here and discuss why we obtained a merge commit locally

Ideas? What happened under the hood? Discuss git fetch as an alternative to git pull. Discuss git pull --rebase as an alternative to avoid merge commits.

9. Try to push again

It will work for one more person.

10. Create a branch yourname/somefeature pointing at your commit

$ git branch yourname/somefeature

11. Push your change as a new branch

$ git push origin -u yourname/somefeature

Can we leave out the -u?

12. Submit a pull request

Submit a pull request from your branch towards the master branch. Do this through the web interface.

After the exercise

  1. Instructor removes collaborators.
  2. Instructor rewinds the repository to the state before the exercise.

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Exercise to practice collaborative centralized workflow.

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