Update Git branches from master

Question

I m new to Git  and now I m in this situation    I have four branches  master  b1  b2  and b3   After I worked on b1-b3  I realized I have something to change on branch master that should be in all other branches  I changed what I needed in master and    here is my problem    How do I update all other branches with master branch code

User · Answer

to update your branch from the master      git checkout master   git pull   git checkout your branch   git merge master

User · Answer

You can merge  or you can apply individual commits across branches by using git cherry-pick

User · Answer

You have basically two options    You merge  That is actually quite simple  and a perfectly local operation   git checkout b1 git merge master   repeat for b2 and b3   This leaves the history exactly as it happened  You forked from master  you made changes to all branches  and finally you incorporated the changes from master into all three branches   git can handle this situation really well  it is designed for merges happening in all directions  at the same time  You can trust it be able to get all threads together correctly  It simply does not care whether branch b1 merges master  or master merges b1  the merge commit looks all the same to git  The only difference is  which branch ends up pointing to this merge commit  You rebase  People with an SVN  or similar background find this more intuitive  The commands are analogue to the merge case   git checkout b1 git rebase master   repeat for b2 and b3   People like this approach because it retains a linear history in all branches  However  this linear history is a lie  and you should be aware that it is  Consider this commit graph   A --- B --- C --- D  lt -- master       -- E --- F --- G  lt -- b1   The merge results in the true history   A --- B --- C --- D  lt -- master                         -- E --- F --- G  -- H  lt -- b1   The rebase  however  gives you this history   A --- B --- C --- D  lt -- master                                           -- E  --- F  --- G   lt -- b1   The point is  that the commits E   F   and G  never truly existed  and have likely never been tested  They may not even compile  It is actually quite easy to create nonsensical commits via a rebase  especially when the changes in master are important to the development in b1   The consequence of this may be  that you can t distinguish which of the three commits E  F  and G actually introduced a regression  diminishing the value of git bisect   I am not saying that you shouldn t use git rebase  It has its uses  But whenever you do use it  you need to be aware of the fact that you are lying about history  And you should at least compile test the new commits

User · Answer

git checkout master git pull git checkout feature branch git rebase master git push -f  You need to do a forceful push after rebasing against master

User · Answer

You have two options   The first is a merge  but this creates an extra commit for the merge    Checkout each branch   git checkout b1   Then merge   git merge origin master   Then push   git push origin b1   Alternatively  you can do a rebase   git fetch git rebase origin master

User · Answer

There are two options for this problem    1  git rebase  2  git merge   Only diff with above both in case of merge  will have extra commit in history   1  git checkout branch b1 b2 b3   2  git rebase origin master  In case of conflicts resolve locally by doing git rebase --continue   3  git push  Alternatively  git merge option is similar fashion  1  git checkout  your branch  b1 b2 b3   2  git merge master  3  git push

User · Answer

To update other branches like  backup  with your master branch copy   You can do follow either way  rebase or merge       Do rebase  there won t be any extra commit made to the backup branch   Merge branches  there will be an extra commit automatically to the backup branch    Note   Rebase is nothing but establishing a new base  a new copy     git checkout backup git merge master git push     Repeat for other branches if any like backup2  amp  etc       git checkout backup git rebase master git push     Repeat for other branches if any like backup2  amp  etc

User · Answer

cmaster made the best elaborated answer  In brief    git checkout master   git pull   update local master from remote master git checkout  lt your branch gt  git merge master   solve merge conflicts if you have    You should not rewrite branch history instead keep them in actual state for future references  While merging to master  it creates one extra commit but that is cheap  Commits does not cost

User · Answer

If you ve been working on a branch on-and-off  or lots has happened in other branches while you ve been working on something  it s best to rebase your branch onto master  This keeps the history tidy and makes things a lot easier to follow    git checkout master git pull git checkout local branch name git rebase master git push --force   force required if you ve already pushed   Notes    Don t rebase branches that you ve collaborated with others on   You should rebase on the branch to which you will be merging which may not always be master    There s a chapter on rebasing at http   git-scm com book ch3-6 html  and loads of other resources out there on the web

User · Answer

git rebase master is the proper way to do this  Merging would mean a commit would be created for the merge  while rebasing would not

[git] Update Git branches from master

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