The normal way to contribute to a public repo with git. https://github.com/junit-team/junit4/blob/e848a97320851c8614cf9712fa5e2b5092d82925/CONTRIBUTING.md
Forked sync changes in the upstream repo: https://help.github.com/articles/configuring-a-remote-for-a-fork/ https://help.github.com/articles/syncing-a-fork /
Delete a branch.
git branch -d branch_name
List all the branches.
Switch to a branch
git checkout branch_name
Git make the current branch exactly the same as upstream.
git fetch upstream
git reset --hard upstream/master
git push -f origin [current_branch_name]
Delete a branch remotely
git push origin --delete <branchName>
How to checkout a remote branch that doesn't exist locally?
git branch -v -a To see all the branches available for checkout.
git checkout <branch_name> The branch name should not contain origin/ or remotes/.
- How to deal with a detached HEAD?
It is caused by checking out a remote branch directly like
git checkout origin/devel
Or caused by checkout a commit with SHA1.
It is starting a new route from a previous node (commit).
So you need to create a branch to save the changes on the detached HEAD.
git checkout -b <branch_name> is good enough.
- Show remote URL.
git remote show origin
List the tags
Get pull the tags
Add a tag
git tag -a tag_name git push origin tag_name
How to undo a commit (not pushed to remote) to unstagged?
git reset HEAD~
How to revert the last several commits? First you can use
git reset <SHA1>and
git push origin <branch_name> -f. However, this is not recommended, since it lost the information of those commits in the commit history. You should use revert. If only revert one commit, just
git revert <SHA>. This command will directly fire a new commit for you to reverse the changes. If multiple revert, use
git revert -n <SHA>multiple times for different commits in the latest to the oldest order.
-nmeans do not auto fire a commit for it. If the commit to be reverted is a merge commit, use
git revert -n <SHA> -m 1to revert to the 1st branch or
-m 2to revert to the second branch. Then make a commit. It can only revert the last changes, instead of jumping over some commits and revert the previous ones.
How to revert commits in the middle of the history? If we have commit A B C D E, and you want to revert B and C. You first
git checkout -b <new_branch_name> <SHA of A>. Then cherry-pick the commits from D to E with
git cherry-pick <SHA of D>..<SHA of E>.
how to delete a tag?
git tag -d [tag_name]
git push origin :[tag_name]
how to delete a release? click the release name. The delete button is on the top right.
How to stash? We stash the uncommited changes and pull from remote and unstash them to apply.
git stash pop
rebase master -i
Sync with Remote
Force push the local changes.
git push origin branch_name --force-with-lease
git checkout branch_name git fetch --all git reset --hard origin/branch_name
How to merge two branches?
You can use git merge but not recommended.
git rebase is more professional.
For example, you are rebasing the master branch when you are on a feature branch.
It would start from the current master branch head,
and add the commits of your feature branch one by one to it.
So that in the log of the current branch (feature) the commits from master would before the commits of the feature branch.
If there is a conflict, it would stop and ask you to solve.
You just solve it and git add the files with conflicts.
and no commit is needed just use
git rebase --continue to continue the rebase process.
When push to the remote branch, it needs to use
git push --force-with-release origin branch_name .
How to cherry-pick?
Just find the commit in other branch you need.
And on the branch you want to add the commit, execute
git cherry-pick <SHA>.
Working on a branch with a dependence on another branch that is being reviewed
feature_b is created like this
git checkout feature_a
git checkout -b feature_b
update feature_b for the latest changes in feature_a
git checkout feature_b
git rebase feature_a
When feature_a has been merged into master, you simply get the new master and rebase feature_a onto it a last time:
git checkout master
git pull origin master
git checkout feature_b
git rebase --onto master feature_a feature_b