73 lines
2.0 KiB
Go
73 lines
2.0 KiB
Go
/*
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Copyright 2018 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package commands
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import (
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"github.com/GoogleCloudPlatform/k8s-container-builder/pkg/util"
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"github.com/containers/image/manifest"
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"github.com/docker/docker/builder/dockerfile/instructions"
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"github.com/sirupsen/logrus"
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"strings"
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)
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type LabelCommand struct {
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cmd *instructions.LabelCommand
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}
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func (r *LabelCommand) ExecuteCommand(config *manifest.Schema2Config) error {
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logrus.Info("cmd: LABEL")
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return updateLabels(r.cmd.Labels, config)
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}
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func updateLabels(labels []instructions.KeyValuePair, config *manifest.Schema2Config) error {
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existingLabels := config.Labels
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// Let's unescape values before setting the label
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for index, kvp := range labels {
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unescaped, err := util.ResolveEnvironmentReplacement(kvp.Value, []string{}, false)
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if err != nil {
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return err
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}
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labels[index] = instructions.KeyValuePair{
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Key: kvp.Key,
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Value: unescaped,
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}
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}
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for _, kvp := range labels {
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logrus.Infof("Applying label %s=%s", kvp.Key, kvp.Value)
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existingLabels[kvp.Key] = kvp.Value
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}
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config.Labels = existingLabels
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return nil
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}
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// No files have changed, this command only touches metadata.
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func (r *LabelCommand) FilesToSnapshot() []string {
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return []string{}
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}
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// CreatedBy returns some information about the command for the image config history
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func (r *LabelCommand) CreatedBy() string {
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l := []string{r.cmd.Name()}
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for _, kvp := range r.cmd.Labels {
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l = append(l, kvp.String())
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}
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return strings.Join(l, " ")
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}
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