/// <summary>
/// Merges the given commit into HEAD as well as performing a Fast Forward if possible.
/// </summary>
/// <param name="commit">The commit to use as a reference for the changes that should be merged into HEAD.</param>
/// <param name="merger">If the merge generates a merge commit (i.e. a non-fast forward merge), the <see cref="Signature"/> of who made the merge.</param>
/// <returns>The result of the performed merge <see cref="MergeResult"/>.</returns>
public MergeResult Merge(Commit commit, Signature merger)
{
using (GitMergeHeadHandle mergeHeadHandle = Proxy.git_merge_head_from_oid(Handle, commit.Id.Oid))
{
GitMergeOpts opts = new GitMergeOpts()
{
Version = 1,
MergeTreeOpts = { Version = 1 },
CheckoutOpts = { version = 1 },
};
// Perform the merge in libgit2 and get the result back.
GitMergeResult gitMergeResult;
using (GitMergeResultHandle mergeResultHandle = Proxy.git_merge(Handle, new GitMergeHeadHandle[] { mergeHeadHandle }, opts))
{
gitMergeResult = new GitMergeResult(mergeResultHandle);
}
// Handle the result of the merge performed in libgit2
// and commit the result / update the working directory as necessary.
MergeResult mergeResult;
switch (gitMergeResult.Status)
{
case MergeStatus.UpToDate:
mergeResult = new MergeResult(MergeStatus.UpToDate);
break;
case MergeStatus.FastForward:
Commit fastForwardCommit = this.Lookup <Commit>(gitMergeResult.FastForwardId);
FastForward(fastForwardCommit);
mergeResult = new MergeResult(MergeStatus.FastForward, fastForwardCommit);
break;
case MergeStatus.NonFastForward:
{
if (Index.IsFullyMerged)
{
// Commit the merge
Commit mergeCommit = this.Commit(Info.Message, author: merger, committer: merger);
mergeResult = new MergeResult(MergeStatus.NonFastForward, mergeCommit);
}
else
{
mergeResult = new MergeResult(MergeStatus.Conflicts);
}
}
break;
default:
throw new NotImplementedException(string.Format("Unknown MergeStatus: {0}", gitMergeResult.Status));
}
return(mergeResult);
}
}
internal GitMergeResult(GitMergeResultHandle handle)
{
IsUpToDate = Proxy.git_merge_result_is_uptodate(handle);
IsFastForward = Proxy.git_merge_result_is_fastforward(handle);
if (IsFastForward)
{
FastForwardId = Proxy.git_merge_result_fastforward_oid(handle);
}
}
