java – 使用jGit循环提交文件

我已经成功地掌握了jGit文件的基础知识,包括连接到repos以及添加,提交甚至循环文件的提交消息.

File gitDir = new File("/Users/myname/Sites/helloworld/.git");

RepositoryBuilder builder = new RepositoryBuilder();
Repository repository;
repository = builder.setGitDir(gitDir).readEnvironment()
        .findGitDir().build();

Git git = new Git(repository);
RevWalk walk = new RevWalk(repository);
RevCommit commit = null;

// Add all files
// AddCommand add = git.add();
// add.addFilepattern(".").call();

// Commit them
// CommitCommand commit = git.commit();
// commit.setMessage("Commiting from java").call();

Iterable<RevCommit> logs = git.log().call();
Iterator<RevCommit> i = logs.iterator();

while (i.hasNext()) {
    commit = walk.parseCommit( i.next() );
    System.out.println( commit.getFullMessage() );

}

我接下来要做的是能够获取单个文件的所有提交消息,然后能够将单个文件还原回特定的参考/时间点.

解决方法:

以下是如何根据所有父提交查找提交的更改

        var tree = new TreeWalk(repository)
        tree.addTree(commit.getTree)
        commit.getParents foreach {
            parent => tree.addTree(parent.getTree)
        }
        tree.setFilter(TreeFilter.ANY_DIFF)

(斯卡拉码)

请注意,TreeFilter.ANY_DIFF适用于单个树步行者,并将返回根提交中可用的所有元素.

然后,您必须遍历树以查看您的文件是否在给定的delta中(这非常简单).

    while (tree.next)
            if (tree.getDepth == cleanPath.size) {
                // we are at the right level, do what you want
            } else {
                if (tree.isSubtree &&
                    name == cleanPath(tree.getDepth)) {
                    tree.enterSubtree
                }
            }
    }

(cleanPath是纯粹的repo路径,由’/’分隔)

现在将该代码包装到RevWalk.next循环中,您将获得提交更改的提交和文件.

您可能希望使用与ANY_DIFF不同的过滤器,因为如果一棵树不同,则ANY_DIFF为真.如果合并中blob与所有父树相比没有变化,则这有点违反直觉.所以这里是ALL_DIFF的核心,它只显示与所有父树不同的元素：

override def include(walker: TreeWalk): Boolean = {
    val n = walker.getTreeCount();
    if (n == 1) {
        return true;
    }
    val m = walker.getRawMode(0)
    var i = 1
    while (i < n) {
        if (walker.getRawMode(i) == m && walker.idEqual(i, 0)) {
            return false
        }
        i += 1
    }
    true
}

(scala代码,派生自AnyDiffFilter)

标签：jgit,java
来源： https://codeday.me/bug/20191004/1852205.html