github.com/GoogleContainerTools/skaffold@v1.39.18/pkg/skaffold/build/buildpacks/metadata.go (about)

     1  /*
     2  Copyright 2019 The Skaffold Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package buildpacks
    18  
    19  import (
    20  	"encoding/json"
    21  
    22  	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/schema/latest"
    23  )
    24  
    25  type buildMetadata struct {
    26  	Bom []bom `json:"bom"`
    27  }
    28  
    29  type bom struct {
    30  	Metadata bomMetadata `json:"metadata"`
    31  }
    32  
    33  type bomMetadata struct {
    34  	Sync []syncRule `json:"devmode.sync"`
    35  }
    36  
    37  type syncRule struct {
    38  	Src  string `json:"src"`
    39  	Dest string `json:"dest"`
    40  }
    41  
    42  // $ docker inspect demo/buildpacks | jq -r '.[].Config.Labels["io.buildpacks.build.metadata"] | fromjson.bom[].metadata["devmode.sync"]'
    43  func SyncRules(labels map[string]string) ([]*latest.SyncRule, error) {
    44  	metadataJSON, present := labels["io.buildpacks.build.metadata"]
    45  	if !present {
    46  		return nil, nil
    47  	}
    48  
    49  	m := buildMetadata{}
    50  	if err := json.Unmarshal([]byte(metadataJSON), &m); err != nil {
    51  		return nil, err
    52  	}
    53  
    54  	var rules []*latest.SyncRule
    55  
    56  	for _, b := range m.Bom {
    57  		for _, sync := range b.Metadata.Sync {
    58  			rules = append(rules, &latest.SyncRule{
    59  				Src:  sync.Src,
    60  				Dest: sync.Dest,
    61  			})
    62  		}
    63  	}
    64  
    65  	return rules, nil
    66  }