Add support for Repository.ReachableFromAny() (#826)

This change exposes the binding for `git_graph_reachable_from_any()`.

1 files changed, 27 insertions, 0 deletions

diff --git a/graph.go b/graph.go
index 688818c..05da423 100644
--- a/graph.go
+++ b/graph.go
@@ -40,3 +40,30 @@ func (repo *Repository) AheadBehind(local, upstream *Oid) (ahead, behind int, er
 
 	return int(aheadT), int(behindT), nil
 }
+
+// ReachableFromAny returns whether a commit is reachable from any of a list of
+// commits by following parent edges.
+func (repo *Repository) ReachableFromAny(commit *Oid, descendants []*Oid) (bool, error) {
+	if len(descendants) == 0 {
+		return false, nil
+	}
+
+	coids := make([]C.git_oid, len(descendants))
+	for i := 0; i < len(descendants); i++ {
+		coids[i] = *descendants[i].toC()
+	}
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_graph_reachable_from_any(repo.ptr, commit.toC(), &coids[0], C.size_t(len(descendants)))
+	runtime.KeepAlive(repo)
+	runtime.KeepAlive(commit)
+	runtime.KeepAlive(coids)
+	runtime.KeepAlive(descendants)
+	if ret < 0 {
+		return false, MakeGitError(ret)
+	}
+
+	return (ret > 0), nil
+}