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image.go
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image.go
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/*
Copyright © 2020 Yevhen Lebid ealebed@gmail.com
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 dockerhub
import (
"os/exec"
"regexp"
"time"
"github.com/fatih/color"
)
// RenewDockerImage renew docker image tags older than 20 days from docker hub
func (c *Client) RenewDockerImage(image string) error {
tags, err := c.ListTags(image)
if err != nil {
return err
}
loc, _ := time.LoadLocation("UTC")
currentTime := time.Now().In(loc)
expiredRange := (time.Hour * 24 * 20)
validTag := regexp.MustCompile(`^\d{2}\.\d{2}\.\d{2}\-\d{2}\.\d{2}$`)
for _, tag := range tags {
imageReference := c.ORG + "/" + image + ":" + tag.Name
if !validTag.MatchString(tag.Name) {
color.Yellow(" Skip %s ", BW(imageReference))
} else {
lastUpdatedAt := tag.LastUpdated.In(loc)
diff := currentTime.Sub(lastUpdatedAt)
if diff.Hours() > expiredRange.Hours() {
commandPull(imageReference)
commandPush(imageReference)
commandRmi(imageReference)
} else {
color.Yellow(" Skip %s ", BW(imageReference))
}
}
}
return nil
}
// helper function to create the `docker pull` command.
func commandPull(imageReference string) {
color.Green(" <== Pulling from dockerHub %s ", BW(imageReference))
exec.Command("docker", "pull", imageReference).Run()
}
// helper function to create the `docker push` command.
func commandPush(imageReference string) {
color.Green(" ==> Pushing to dockerHub %s ", BW(imageReference))
exec.Command("docker", "push", imageReference).Run()
}
// helper function to create the `docker image rm` command.
func commandRmi(imageReference string) {
color.Red(" Removing from localhost %s ", BW(imageReference))
exec.Command("docker", "image", "rm", imageReference).Run()
}