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multi_tags_watcher.go
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multi_tags_watcher.go
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package poll
import (
"sort"
"github.com/alwinius/bow/extension/credentialshelper"
"github.com/alwinius/bow/internal/policy"
"github.com/alwinius/bow/provider"
"github.com/alwinius/bow/registry"
"github.com/alwinius/bow/types"
"github.com/alwinius/bow/util/version"
"github.com/prometheus/client_golang/prometheus"
log "github.com/sirupsen/logrus"
)
// WatchRepositoryTagsJob - watch all tags
type WatchRepositoryTagsJob struct {
providers provider.Providers
registryClient registry.Client
details *watchDetails
// latests map[string]string // a map of prerelease tags and their corresponding latest versions
}
// NewWatchRepositoryTagsJob - new tags watcher job
func NewWatchRepositoryTagsJob(providers provider.Providers, registryClient registry.Client, details *watchDetails) *WatchRepositoryTagsJob {
return &WatchRepositoryTagsJob{
providers: providers,
registryClient: registryClient,
details: details,
// latests: details.trackedImage.SemverPreReleaseTags,
}
}
// Run - main function to check schedule
func (j *WatchRepositoryTagsJob) Run() {
j.details.mu.RLock()
defer j.details.mu.RUnlock()
creds := credentialshelper.GetCredentials(j.details.trackedImage)
reg := j.details.trackedImage.Image.Scheme() + "://" + j.details.trackedImage.Image.Registry()
if j.details.latest == "" {
j.details.latest = j.details.trackedImage.Image.Tag()
}
repository, err := j.registryClient.Get(registry.Opts{
Registry: reg,
Name: j.details.trackedImage.Image.ShortName(),
Tag: j.details.latest,
Username: creds.Username,
Password: creds.Password,
})
if err != nil {
log.WithFields(log.Fields{
"error": err,
"registry_url": reg,
"image": j.details.trackedImage.Image.String(),
}).Error("trigger.poll.WatchRepositoryTagsJob: failed to get repository")
return
}
registriesScannedCounter.With(prometheus.Labels{"registry": j.details.trackedImage.Image.Registry(), "image": j.details.trackedImage.Image.Repository()}).Inc()
log.WithFields(log.Fields{
"current_tag": j.details.trackedImage.Image.Tag(),
"repository_tags": repository.Tags,
"image_name": j.details.trackedImage.Image.Remote(),
}).Debug("trigger.poll.WatchRepositoryTagsJob: checking tags")
err = j.processTags(repository.Tags)
if err != nil {
log.WithFields(log.Fields{
"error": err,
"repository_tags": repository.Tags,
"image": j.details.trackedImage.Image.String(),
}).Error("trigger.poll.WatchRepositoryTagsJob: failed to process tags")
return
}
}
func (j *WatchRepositoryTagsJob) computeEvents(tags []string) ([]types.Event, error) {
trackedImages, err := j.providers.TrackedImages()
if err != nil {
return nil, err
}
events := []types.Event{}
// collapse removes all non-semver tags and only takes
// the highest versions of each prerelease + the main version that doesn't have
// any prereleases
tags = collapse(tags)
for _, trackedImage := range getRelatedTrackedImages(j.details.trackedImage, trackedImages) {
// matches, going through tags
for _, tag := range tags {
update, err := trackedImage.Policy.ShouldUpdate(trackedImage.Image.Tag(), tag)
if err != nil {
continue
}
if update && !exists(tag, events) {
event := types.Event{
Repository: types.Repository{
Name: j.details.trackedImage.Image.Repository(),
Tag: tag,
OldTag: j.details.trackedImage.Image.Tag(),
},
TriggerName: types.TriggerTypePoll.String(),
}
events = append(events, event)
}
}
}
return events, nil
}
func exists(tag string, events []types.Event) bool {
for _, e := range events {
if tag == e.Repository.Tag {
return true
}
}
return false
}
// collapse gets latest available tags for main version and pre-releases
// example:
// [1.0.0, 1.5.0, 1.3.0-dev, 1.4.5-dev] would become [1.5.0, 1.4.5-dev]
func collapse(tags []string) []string {
r := map[string]string{}
p := policy.NewSemverPolicy(policy.SemverPolicyTypeAll)
for _, t := range tags {
v, err := version.GetVersion(t)
// v, err := semver.NewVersion(tag)
if err != nil {
continue
}
stored, ok := r[v.PreRelease]
if !ok {
r[v.PreRelease] = t
continue
}
higher, err := p.ShouldUpdate(stored, t)
if err != nil {
continue
}
if higher {
r[v.PreRelease] = t
}
}
result := []string{}
for _, tag := range r {
result = append(result, tag)
}
// always sort, for test purposes
sort.Strings(result)
return result
}
func getRelatedTrackedImages(ours *types.TrackedImage, all []*types.TrackedImage) []*types.TrackedImage {
b := all[:0]
for _, x := range all {
if x.Image.Repository() == ours.Image.Repository() {
b = append(b, x)
}
}
return b
}
func (j *WatchRepositoryTagsJob) processTags(tags []string) error {
events, err := j.computeEvents(tags)
if err != nil {
return err
}
for _, e := range events {
err = j.providers.Submit(e)
if err != nil {
log.WithFields(log.Fields{
"repository": j.details.trackedImage.Image.Repository(),
"new_tag": e.Repository.Tag,
"error": err,
}).Error("trigger.poll.WatchRepositoryTagsJob: error while submitting an event")
}
}
return nil
}