Question

Basically I need to get older version of a file in the repository without changing the current working file.
I thought of different ways:

• Temporary branch and do the thing
• Copy the file, checkout the file do my thing and return it

But those ways are really slow and complex. Isn’t there something simpler than that in ngit?

Answer 1

Using NGit: for details of the method usage, please see jgit documentation http://jgit.info/javadoc/

ObjectId commitId = git.GetRepository().Resolve(ref);
RevWalk revWalk = new RevWalk(git.GetRepository());
RevTree revTree = loRevWalk.ParseTree(commitId);
TreeWalk treeWalk = new TreeWalk(git.GetRepository());
treeWalk.AddTree(revTree);

while (treeWalk.Next())
{
    //compare treeWalk.NameString yourself
    byte[] bytes = treeWalk.ObjectReader.Open(treeWalk.GetObjectId(0)).GetCachedBytes()
    ...
}