JGit: Checkout a remote branch

问题:

I'm using JGit to checkout a remote tracking branch.

Git binrepository = cloneCmd.call()  CheckoutCommand checkoutCmd = binrepository.checkout(); checkoutCmd.setName( "origin/" + branchName); checkoutCmd.setUpstreamMode(CreateBranchCommand.SetupUpstreamMode.TRACK ); checkoutCmd.setStartPoint( "origin/" + branchName );  Ref ref = checkoutCmd.call(); 

The files are checked out, but the HEAD is not pointing to the branch. Following is the git status output,

$ git status # Not currently on any branch. nothing to commit (working directory clean) 

The same operation can be performed in git command line, easily and it works,

git checkout -t origin/mybranch 

How to do this JGit?

回答1:

You have to use setCreateBranch to create a branch:

Ref ref = git.checkout().         setCreateBranch(true).         setName("branchName").         setUpstreamMode(CreateBranchCommand.SetupUpstreamMode.TRACK).         setStartPoint("origin/" + branchName).         call(); 

Your first command was the equivalent of git checkout origin/mybranch.

(Edit: I submitted a patch to JGit to improve the documentation of CheckoutCommand: https://git.eclipse.org/r/8259)

回答2:

As shown in the code of CheckoutCommand, you need to set the boolean createBranch to true in order to create a local branch.

You can see an example in CheckoutCommandTest - testCreateBranchOnCheckout()

@Test public void testCreateBranchOnCheckout() throws Exception {   git.checkout().setCreateBranch(true).setName("test2").call();   assertNotNull(db.getRef("test2")); } 

回答3:

For whatever reason, the code that robinst posted did not work for me. In particular, the local branch that was created did not track the remote branch. This is what I used that worked for me (using jgit 2.0.0.201206130900-r):

git.pull().setCredentialsProvider(user).call() git.branchCreate().setForce(true).setName(branch).setStartPoint("origin/" + branch).call(); git.checkout().setName(branch).call() 

回答4:

you also can just like this

git.checkout().setName(remoteBranch).setForce(true).call();                 logger.info("Checkout to remote branch:" + remoteBranch);                 git.branchCreate()                     .setName(branchName)                    .setUpstreamMode(SetupUpstreamMode.SET_UPSTREAM)                    .setStartPoint(remoteBranch)                    .setForce(true)                    .call();                  logger.info("create new locale branch:" + branchName + "set_upstream with:" + remoteBranch);                 git.checkout().setName(branchName).setForce(true).call();                 logger.info("Checkout to locale branch:" + branchName); 

文章来源: JGit: Checkout a remote branch