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Git Teamwork

Git Collaboration Workflow

A common Git collaboration workflow is:

  1. Fetch and merge changes from the remote
  2. Create a branch to work on a new project feature
  3. Develop the feature on a branch and commit the work
  4. Fetch and merge from the remote again (in case new commits were made)
  5. Push branch up to the remote for review

Steps 1 and 4 are a safeguard against merge conflicts, which occur when two branches contain file changes that cannot be merged with the git merge command.

List the Git Remotes

In Git, the git-remote -v command returns a list of remote repositories that the current project is tied to.

  • Git lists the name of the remote repository as well as its locations.
  • Git automatically names this remote origin, because it refers to the remote repository of origin. However, it is possible to safely change its name.
  • The remote is listed twice: once for (fetch) and once for (push).
$ git remote -v origin /home/ccuser/workspace/curriculum/science-quizzes/ (fetch) origin /home/ccuser/workspace/curriculum/science-quizzes/ (push)

Pushing Branch Changes

In Git, the git push origin branch-name command pushes the branch, and all committed changes, to the remote. This branch can now be reviewed by collaborators.

In the example, the current branch containing the committed changes is called bio-questions.

$ git push origin bio-questions Counting objects: 3, done. Delta compression using up to 16 threads. Compressing objects: 100% (3/3), done. Writing objects: 100% (3/3), 392 bytes | 0 bytes/s, done. Total 3 (delta 1), reused 0 (delta 0) To /home/ccuser/workspace/curriculum-a/science-quizzes * [new branch] bio-questions -> bio-questions

Cloning a Remote Repository

In Git, the git clone remote_location clone_name command creates a local copy of a remote repository.

  • remote_location tells Git where to find the remote repository and can be a filepath or web address.
  • clone_name is the name of the directory where the remote repository’s contents will be copied.

In the example, my-quizzes is a new directory created as a local copy of the science-quizzes Git project. Committing changes to my-quizzes will not impact science-quizzes.

$ ls science-quizzes $ git clone science-quizzes/ my-quizzes Cloning into 'my-quizzes'... done. $ ls my-quizzes science-quizzes

Fetching Remote Origin Changes

In Git, the git fetch command downloads objects from the origin remote repository. The changes, however, are not merged into the current branch-name branch. Instead, they are stored in the origin/branch-name branch, waiting to be merged.

In the provided example, using the git branch -a command to see the existing branches, we can see that fetched data has been stored in a new origin/master branch.

$ git branch -a * master $ git fetch remote: Counting objects: 5, done. remote: Compressing objects: 100% (5/5), done. remote: Total 5 (delta 1), reused 0 (delta 0) Unpacking objects: 100% (5/5), done. From /home/ccuser/workspace/curriculum-a/science-quizzes * [new branch] master -> origin/master $ git branch -a * master remotes/origin/master

Git Remote

A remote is a shared Git repository that allows multiple collaborators to work on the same Git project from different locations. Collaborators work on the project independently and merge changes together when they are ready to do so.

Merging Fetched Changes

In Git, the git merge origin/branch-name command will merge fetched changes, stored in origin/branch-name to the current branch-name branch.

In the example, master is the name of the branch being merged.

$ git merge origin/master Updating 2fd7d9b..3a29454 Fast-forward biology.txt | 4 ++++ 1 file changed, 4 insertions(+) create mode 100644 biology.txt

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