jgit blame has null commit shas for some lines of a file

Question

Sometimes when I do the following:

BlameCommand blamer = new BlameCommand(repo);
ObjectId commitID = repo.resolve("head");
blamer.setStartCommit("head");
blamer.setFilePath(fileName);
BlameResult blame = blamer.call();
RevCommit commit = blame.getSourceCommit(0); //set to first line but can be random line of file

The commit obtained from the last line in the sample code is null ; it is not always null , just on some lines of some files. I suspected it has to do with CR/LF issues as I am running this code on a windows machine so I tried changing both my global and repository config core.autocrlf values. I tried both true and false for core.autocrlf but I still have the same problem.

Currently using: jgit-3.1.0.201310021548

Answer 1

I added a snippet at the jgit-cookbook that uses the BlameCommand, it works fine there, in your sample code the setStartCommit() is wrong, it should be the commitID.

The following works for me:

    BlameCommand blamer = new BlameCommand(repository);
    ObjectId commitID = repository.resolve("HEAD");
    blamer.setStartCommit(commitID);
    blamer.setFilePath("README.md");
    BlameResult blame = blamer.call();