How to Git Fetch <remote> using libgit2sharp? - libgit2sharp

Question

My existing Fetch method looks like this.
public void Fetch(string remote) => CommandLine.Run($"git fetch {remote}", _repoFolder);
I would like to implement the same feature using libgit2sharp.
This is what I have came up with:
public void Fetch(string remote)
{
var repo = new Repository(_folder);
var options = new FetchOptions();
options.Prune = true;
options.TagFetchMode = TagFetchMode.Auto;
var refSpecs = $"+refs/heads/*:refs/remotes/{remote}/*";
Commands.Fetch(repo, remote, new [] {refSpecs}, options, "Fetching remote");
}
However this fails with the following error message:
System.InvalidOperationException: 'authentication cancelled'
I have also tried with the libgit2sharp-ssh package, where the result is error code 401 (unathorized client).
I presume the git command line tool works because it knows how to authorize the access (since there is already a remote). How can I achieve the same using libgit2sharp?

Answer 1

Have you tried something like
using(var repo = new Repository(_folder))
{
var options = new FetchOptions();
options.Prune = true;
options.TagFetchMode = TagFetchMode.Auto;
options.CredentialsProvider = new CredentialsHandler(
(url, usernameFromUrl, types) =>
new UsernamePasswordCredentials()
{
Username = "username",
Password = "password"
});
var remote = repo.Network.Remotes["origin"];
var msg = "Fetching remote";
var refSpecs = remote.FetchRefSpecs.Select(x => x.Specification);
Commands.Fetch(repo, remote.Name, refSpecs, options, msg);
}