/// <summary>
/// Get the upstream remote and merge branch name from a Canonical branch name.
/// This will return the remote name (or ".") if a local branch for the remote name.
/// </summary>
/// <param name="canonicalName">The canonical branch name to parse.</param>
/// <param name="remoteName">The name of the corresponding remote the branch belongs to
/// or "." if it is a local branch.</param>
/// <param name="mergeBranchName">The name of the upstream branch to merge into.</param>
private void GetUpstreamInformation(string canonicalName, out string remoteName, out string mergeBranchName)
{
remoteName = null;
mergeBranchName = null;
const string localPrefix = "refs/heads/";
const string remotePrefix = "refs/remotes/";
if (canonicalName.StartsWith(localPrefix, StringComparison.Ordinal))
{
remoteName = ".";
mergeBranchName = canonicalName;
}
else if (canonicalName.StartsWith(remotePrefix, StringComparison.Ordinal))
{
remoteName = Proxy.git_branch_remote_name(repo.Handle, canonicalName);
Remote remote = repo.Network.Remotes.RemoteForName(remoteName);
using (RemoteSafeHandle remoteHandle = Proxy.git_remote_load(repo.Handle, remote.Name, true))
{
GitFetchSpecHandle fetchSpecPtr = Proxy.git_remote_fetchspec(remoteHandle);
mergeBranchName = Proxy.git_fetchspec_rtransform(fetchSpecPtr, canonicalName);
}
}
else
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture,
"'{0}' does not look like a valid canonical branch name.", canonicalName));
}
}
internal static extern int git_refspec_rtransform(
byte[] target,
UIntPtr outlen,
GitFetchSpecHandle refSpec,
[MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(Utf8Marshaler))] string name);
