update vendor

Signed-off-by: Roland.Ma <rolandma@yunify.com>

vendor/sigs.k8s.io/kustomize/api/internal/git/cloner.go

@@ -0,0 +1,51 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package git
+
+import (
+	"sigs.k8s.io/kustomize/api/filesys"
+)
+
+// Cloner is a function that can clone a git repo.
+type Cloner func(repoSpec *RepoSpec) error
+
+// ClonerUsingGitExec uses a local git install, as opposed
+// to say, some remote API, to obtain a local clone of
+// a remote repo.
+func ClonerUsingGitExec(repoSpec *RepoSpec) error {
+	r, err := newCmdRunner()
+	if err != nil {
+		return err
+	}
+	repoSpec.Dir = r.dir
+	if err = r.run("init"); err != nil {
+		return err
+	}
+	if err = r.run(
+		"remote", "add", "origin", repoSpec.CloneSpec()); err != nil {
+		return err
+	}
+	ref := "HEAD"
+	if repoSpec.Ref != "" {
+		ref = repoSpec.Ref
+	}
+	if err = r.run("fetch", "--depth=1", "origin", ref); err != nil {
+		return err
+	}
+	if err = r.run("checkout", "FETCH_HEAD"); err != nil {
+		return err
+	}
+	return r.run("submodule", "update", "--init", "--recursive")
+}
+
+// DoNothingCloner returns a cloner that only sets
+// cloneDir field in the repoSpec.  It's assumed that
+// the cloneDir is associated with some fake filesystem
+// used in a test.
+func DoNothingCloner(dir filesys.ConfirmedDir) Cloner {
+	return func(rs *RepoSpec) error {
+		rs.Dir = dir
+		return nil
+	}
+}