add Duration type to compatible toml v1 version

Signed-off-by: rongfu.leng <rongfu.leng@daocloud.io>

pkg/tomlext/toml_v2_util.go

@@ -0,0 +1,38 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package tomlext
+
+import "time"
+
+type Duration time.Duration
+
+func (d *Duration) UnmarshalText(b []byte) error {
+	x, err := time.ParseDuration(string(b))
+	if err != nil {
+		return err
+	}
+	*d = Duration(x)
+	return nil
+}
+
+func ToStdTime(d Duration) time.Duration {
+	return time.Duration(d)
+}
+
+func FromStdTime(duration time.Duration) Duration {
+	return Duration(duration)
+}