Then we need a 3-way merge which uses a dedicated commit to merge two histories or you can say branches. Fast-forward merge is not possible if the branches have diverged. Here instead of actually merging the two branches git simply moves the current branch tip up to the target branch tip. By this, the branch being merged is not affected.įast forward merge happens when the tip of the current branch (“dev” in our case) is a direct ancestor of the target branch (“main” in our case). When we perform merging, git always merges with the current branch from where we are performing the operation(in our case it is “main”). Here git finds the common base, creates a new merge commit, and merged them.Ī git merge operation is performed by running the command “git merge ”. In our case, we have two branches one is the default branch called “main” and the other branch named “dev” and this is how our git repo looks before merging. There is a proper merging algorithm in git, with the help of which git performs all of these operations and presents conflicts if there are any. When git finds the common base commit it simply creates a “merge commit” automatically and merges each queued merge commit sequence. What happens is when we try to merge two branches, git takes two commit pointers and starts searching for a common base commit in those two specified bit branches. The concept of git merging is basically to merge multiple sequences of commits, stored in multiple branches in a unified history or to be simple you can say in a single branch.
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How to Set Git Username and Password in GitBash?.How to Upload Project on GitHub from Android Studio?.Setting up Sublime Text for C++ Competitive Programming Environment.How to integrate Git Bash with Visual Studio Code?.ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.If your colleagues change the remote repository after your last pull request, this flag will raise an error to prevent you from overwriting the new commits.įor more details and variants of the git push command, you can check the official documentation. Use the -force-with-lease flag instead of the -force flag. Use the git revert command if you need to correct a mistake that you may have pushed onto the remote repository. Therefore, the following safety rules should be kept in mind when using the git push -force -u origin command:ĭo not use the command on shared repositories unless you are certain your colleagues have not made any changes since your last pull request. If someone else makes a new commit to the remote repository that is not present in your local commit history, using the git push -force -u origin command will remove that commit. Since the git push -force -u origin command forcefully overwrites the commit history of the remote repository, its use is discouraged when working on shared repositories.
origin saves you the trouble of writing out the entire remote repository URL when you need to push changes. Origin: The origin option refers to an alias on your system for a remote repository URL Uniform Resource Locator. Tracking references can be used in argument-less commands, e.g., git pull. u: The -u flag creates a tracking reference for every branch that you successfully push onto the remote repository. force: The -force flag is responsible for overriding the protective measures of the remote repository to ensure that your changes are forcefully pushed. The options in the git push -force -u origin command are described as follows:
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