Is there any way to git checkout previous branch?_问答_开发者

I sort of want the equivalent of cd - for git. If I am in branch mast开发者_如何学运维er and I checkout foo, I would love to be able to type something like git checkout - to go back to master, and be able to type it again to return to foo.

Does anything like this exist? Would it be hard to implement?

From the release notes for 1.6.2

@{-1} is a way to refer to the last branch you were on. This is
accepted not only where an object name is expected, but anywhere a branch name is expected and acts as if you typed the branch name.
E.g. git branch --track mybranch @{-1}, git merge @{-1}, and
git rev-parse --symbolic-full-name @{-1} would work as expected.

and

git checkout - is a shorthand for git checkout @{-1}.

To see the list of previous checkouts:

i=0; while [ $? -eq 0 ]; do i=$((i+1)); echo -n "$i. "; git rev-parse --symbolic-full-name @{-$i} 2> /dev/null; done

This Bash one-liner script is not perfect but it should work for most cases. Note that sometimes the number may skip.

Tip: You can add it to .bashrc as a function.

The simplest way of doing this nowadays is:

git checkout -

... which is an alias of:

git checkout @{-1}

Is there any way to git checkout previous branch?

If you want to know more about this, I wrote an entire article about it here: Checkout The Previous Branch In Git.

Git version 2.23 introduced the git switch command which you can use to do that (and more). Quoting the official documentation:

Switch to a specified branch. The working tree and the index are updated to match the branch. All new commits will be added to the tip of this branch.

In your specific case you can issue git switch - to go back to the branch you were previously on. You can execute the same command again to return to the first branch.

This command is less confusing and friendly-to-beginners as it addresses a common confusion that arises when using git checkout.

As @Karl points out and from git checkout manual:

As a special case, the "@{-N}" syntax for the N-th last branch checks out the branch (instead of detaching). You may also specify - which is synonymous with "@{-1}".

So both git checkout - and git checkout @{-1} would work in this case

~~Closest I believe is using the git reflog and parse the latest moving from branch1 to branch2 and git checkout branch1~~

I landed to this question with the same thought to checkout my previous branch. I'm using ohmyz in Mac. Below command helped me.

$ gco -
$ git checkout -

Just adding some more detail to the previous answers to understand the mechanism by which git checkout @{-N} works. It walks the reflog to inspect the checkout history, so if you wanted to implement something similar on your own you should be able to parse the output of git reflog looking for checkout: lines. You can check the implementation in the git source sha1_name.c, specifically the function interpret_nth_prior_checkout.

Here are pointers to the parts of Git’s documentation that describe the git checkout - and git checkout @{-1} solutions given by the other answers:

When specifying a Git revision for any command, @{-<n>}, e.g. @{-1} means “the nth branch/commit checked out before the current one.” The documentation for git checkout <branch> reiterates: “You can use the @{-N} syntax to refer to the N-th last branch/commit checked out using git checkout operation.”
For the <branch> argument of git checkout, “you may also specify ‘-’ which is synonymous to ‘@{-1}’.”