cloudfoundry-incubator/eirini

package util

import (
    "fmt"
    "regexp"
    "strconv"
    "strings"

    "github.com/pkg/errors"
)

const DockerHubHost = "index.docker.io/v1/"

var dockerRX = regexp.MustCompile(`([a-zA-Z0-9.-]+)(:([0-9]+))?/(\S+/\S+)`)

func ParseAppIndex(podName string) (int, error) {
    sl := strings.Split(podName, "-")

    if len(sl) <= 1 {
        return 0, fmt.Errorf("could not parse app name from %s", podName)
    }

    index, err := strconv.Atoi(sl[len(sl)-1])
    if err != nil {
        return 0, errors.Wrapf(err, "pod %s name does not contain an index", podName)
    }

    return index, nil
}

func ParseImageRegistryHost(imageURL string) string {
    if !dockerRX.MatchString(imageURL) {
        return DockerHubHost
    }

    matches := dockerRX.FindStringSubmatch(imageURL)

    return matches[1]
}