containerd/content/adaptor.go
Kazuyoshi Kato e74ace9ad8 content: support filters on local.store#Walk()
While Walk() has been taking filter strings, it was not using the parameter.
This change actually makes the filtering work.

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>
2020-11-11 11:17:48 -08:00

53 lines
1.3 KiB
Go

/*
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 content
import (
"strings"
"github.com/containerd/containerd/filters"
)
// AdoptInfo returns `filters.Adaptor` that handles `content.Info`.
func AdaptInfo(info Info) filters.Adaptor {
return filters.AdapterFunc(func(fieldpath []string) (string, bool) {
if len(fieldpath) == 0 {
return "", false
}
switch fieldpath[0] {
case "digest":
return info.Digest.String(), true
case "size":
// TODO: support size based filtering
case "labels":
return checkMap(fieldpath[1:], info.Labels)
}
return "", false
})
}
func checkMap(fieldpath []string, m map[string]string) (string, bool) {
if len(m) == 0 {
return "", false
}
value, ok := m[strings.Join(fieldpath, ".")]
return value, ok
}