JGit: How to get all commits of a branch? (Without changes to the working directory …)

问题:

how do I get all commits of a branch with JGit, without changing the working directory?

Unfortunately the JGit docs are not very good ...

In ruby with grit it is very easy:

repo = Grit::Repo.new(pathToRepo)  repo.commits(branchName, false).each do |commit|     doSomethingWithTheCommit end

Bye, hurik

回答1:

With the code below you can get all commits of a branch or tag:

Repository repository = new FileRepository("/path/to/repository/.git"); String treeName = "refs/heads/master"; // tag or branch for (RevCommit commit : git.log().add(repository.resolve(treeName)).call()) {     System.out.println(commit.getName()); }

The varialbe treeName will define the tag or branch. This treeName is the complete name of the branch or tag, for example refs/heads/master for the master branch or refs/tags/v1.0 for a tag called v1.0.

Alternatively, you can use the gitective API. The following code does the same as the code above:

Repository repository = new FileRepository("/path/to/repository/.git");  AndCommitFilter filters = new AndCommitFilter(); CommitListFilter revCommits = new CommitListFilter(); filters.add(revCommits);  CommitFinder finder = new CommitFinder(repository); finder.setFilter(filters); String treeName = "refs/heads/master"; // tag or branch finder.findFrom(treeName);  for (RevCommit commit : revCommits) {     System.out.println(commit.getName()); }

Some try/catch will be necessary, I hide them to make the code shorter. Good luck.

回答2:

Tried this here first: https://stackoverflow.com/a/13925765/2246865

But it wasn't was working always, so I found this here: http://www.eclipse.org/forums/index.php/t/280339/

Here my solution, it isn't really nice, but it's working ...

public static void main(String[] args) throws IOException, GitAPIException {     Repository repo = new FileRepository("pathToRepo/.git");     Git git = new Git(repo);     RevWalk walk = new RevWalk(repo);      List<Ref> branches = git.branchList().call();      for (Ref branch : branches) {         String branchName = branch.getName();          System.out.println("Commits of branch: " + branch.getName());         System.out.println("-------------------------------------");          Iterable<RevCommit> commits = git.log().all().call();          for (RevCommit commit : commits) {             boolean foundInThisBranch = false;              RevCommit targetCommit = walk.parseCommit(repo.resolve(                     commit.getName()));             for (Map.Entry<String, Ref> e : repo.getAllRefs().entrySet()) {                 if (e.getKey().startsWith(Constants.R_HEADS)) {                     if (walk.isMergedInto(targetCommit, walk.parseCommit(                             e.getValue().getObjectId()))) {                         String foundInBranch = e.getValue().getName();                         if (branchName.equals(foundInBranch)) {                             foundInThisBranch = true;                             break;                         }                     }                 }             }              if (foundInThisBranch) {                 System.out.println(commit.getName());                 System.out.println(commit.getAuthorIdent().getName());                 System.out.println(new Date(commit.getCommitTime() * 1000L));                 System.out.println(commit.getFullMessage());             }         }     } }

回答3:

I was just looking for a way to list all commits under each branch and I found this thread. I finally did something a bit different from some of the answers I found here and worked.

public static void main(String[] args) throws IOException, GitAPIException {     Repository repo = new FileRepository("pathToRepo/.git");     Git git = new Git(repo);      List<Ref> branches = git.branchList().call();      for (Ref branch : branches) {         String branchName = branch.getName();          System.out.println("Commits of branch: " + branchName);         System.out.println("-------------------------------------");          Iterable<RevCommit> commits = git.log().add(repo.resolve(branchName)).call();          List<RevCommit> commitsList = Lists.newArrayList(commits.iterator());          for (RevCommit commit : commitsList) {             System.out.println(commit.getName());             System.out.println(commit.getAuthorIdent().getName());             System.out.println(new Date(commit.getCommitTime() * 1000L));             System.out.println(commit.getFullMessage());         }     }      git.close(); }

Thanks for the help

回答4:

You are right, the docs should really be better.

You could use the JGit Log command or use a library like gitective which makes iterating over commits easy. You can look at the source to learn more about JGit.

Other (more complicated) ways are described in this SO-question.

回答5:

A much shorter and clean solution can be done via the "log" command that JGit provides:

    Repository repository = new FileRepository("pathToRepo/.git");     logs = new Git(repository).log()             .add(repository.resolve("remotes/origin/testbranch"))             .call();     count = 0;     for (RevCommit rev : logs) {         System.out.println("Commit: " + rev /* + ", name: " + rev.getName() + ", id: " + rev.getId().getName() */);         count++;     }     System.out.println("Had " + count + " commits overall on test-branch");

See the full snippet at the jgit-cookbook

回答6:

This seems to work but I thought add(ObjectId branch) to provide a gate to the active branch, but I appear to require a range

Git git = ... ObjectId master = git.repository.resolve("refs/heads/master") ObjectId branch = git.repository.resolve("refs/heads/mybranch")  git.log().addRange(master,branch).call()

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