github.com/alibaba/sealer@v0.8.6-0.20220430115802-37a2bdaa8173/pkg/image/store/utils.go (about)

     1  // Copyright © 2021 Alibaba Group Holding Ltd.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package store
    16  
    17  import (
    18  	"github.com/alibaba/sealer/utils"
    19  )
    20  
    21  func traverseLayerDB(layerDBRoot string) ([]string, error) {
    22  	// TODO maybe there no need to traverse layerdb, just clarify how many sha supported in a list
    23  	shaDirs, err := utils.GetDirNameListInDir(layerDBRoot, utils.FilterOptions{
    24  		OnlyDir:      true,
    25  		WithFullPath: true,
    26  	})
    27  	if err != nil {
    28  		return nil, err
    29  	}
    30  
    31  	var layerDirs []string
    32  	for _, shaDir := range shaDirs {
    33  		layerDirList, err := utils.GetDirNameListInDir(shaDir, utils.FilterOptions{
    34  			OnlyDir:      true,
    35  			WithFullPath: true,
    36  		})
    37  		if err != nil {
    38  			return nil, err
    39  		}
    40  		layerDirs = append(layerDirs, layerDirList...)
    41  	}
    42  	return layerDirs, nil
    43  }