var git = require('nodegit')

git.Repo.open(repoPath, function(openError, repo) {
    if (openError) throw openError;
        repo.openIndex(function(openIndexError, index) {
        if (openIndexError) throw openIndexError;
        index.read(function(readError) {
            if (readError) throw readError;
            index.removeByPath(fileName, function(removeByPathError,r) {
                if (removeByPathError) throw removeByPathError; 
                console.log('ok');
            });
        });
    });
});