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scm.go
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scm.go
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package hook
import (
"fmt"
"strings"
"sync"
"github.com/caicloud/nirvana/log"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"github.com/caicloud/cyclone/pkg/apis/cyclone/v1alpha1"
"github.com/caicloud/cyclone/pkg/meta"
api "github.com/caicloud/cyclone/pkg/server/apis/v1alpha1"
in "github.com/caicloud/cyclone/pkg/server/biz/integration"
"github.com/caicloud/cyclone/pkg/server/biz/scm"
"github.com/caicloud/cyclone/pkg/server/common"
"github.com/caicloud/cyclone/pkg/server/config"
"github.com/caicloud/cyclone/pkg/server/handler"
"github.com/caicloud/cyclone/pkg/util/cerr"
)
var once sync.Once
var scmManager *SCMManager
// SCMManager represents manager of SCM instances.
type SCMManager struct {
mutex sync.Mutex
}
// getScmManager returns the scm manager instance
func getScmManager() *SCMManager {
once.Do(func() {
scmManager = &SCMManager{
mutex: sync.Mutex{},
}
})
return scmManager
}
// Register registers SCM webhook if if has not been registered.
func (*SCMManager) Register(tenant string, wft v1alpha1.WorkflowTrigger) error {
var wftName, secretName, repo = wft.Name, wft.Spec.SCM.Secret, wft.Spec.SCM.Repo
log.Infof("start to register webhook for %s/%s , %s", secretName, repo, wftName)
scmManager.mutex.Lock()
defer scmManager.mutex.Unlock()
wfts, err := ListSCMWfts(tenant, repo, secretName)
if err != nil {
log.Infof("list wfts by %s/%s error %s", secretName, repo, err)
return err
}
if len(wfts.Items) > 0 {
log.Infof("webhook of %s/%s has already registered, using wfts length: %d", repo, secretName, len(wfts.Items))
return nil
}
log.Infof("start to create scm webhook %s/%s for wft %s", secretName, repo, wftName)
secret, err := handler.K8sClient.CoreV1().Secrets(common.TenantNamespace(tenant)).Get(secretName, metav1.GetOptions{})
if err != nil {
return cerr.ConvertK8sError(err)
}
integration, err := in.FromSecret(secret)
if err != nil {
log.Error(err)
return err
}
err = createSCMWebhook(integration.Spec.SCM, tenant, secretName, repo)
if err != nil {
log.Error(err)
return err
}
return nil
}
// createSCMWebhook creates webhook for SCM repo.
func createSCMWebhook(scmSource *api.SCMSource, tenant, secret, repo string) error {
sp, err := scm.GetSCMProvider(scmSource)
if err != nil {
log.Errorf("Fail to get SCM provider for %s", scmSource.Server)
return err
}
webhook := &scm.Webhook{
URL: generateWebhookURL(tenant, secret),
Events: []scm.EventType{
scm.PushEventType,
scm.TagReleaseEventType,
scm.PullRequestEventType,
scm.PullRequestCommentEventType,
},
}
err = sp.CreateWebhook(repo, webhook)
if cerr.ErrorExternalAuthenticationFailed.Derived(err) || cerr.ErrorExternalAuthorizationFailed.Derived(err) ||
// GitHub sends a 404 error when your client isn't properly authenticated.
// More info: https://developer.github.com/v3/troubleshooting/
(cerr.ErrorExternalNotFound.Derived(err) && scmSource.Type == api.GitHub) {
return cerr.ErrorCreateWebhookPermissionDenied.Error()
}
return err
}
func generateWebhookURL(tenant, secret string) string {
urlPrefix := strings.TrimPrefix(config.GetWebhookURLPrefix(), "/")
// Construct webhook URL, refer to cyclone/pkg/server/apis/v1alpha1/descriptors/webhook.go
return fmt.Sprintf("%s/tenants/%s/webhook?sourceType=SCM&integration=%s", urlPrefix, tenant, secret)
}
// Unregister unregisters SCM webhook if if has no other wft using.
func (o *SCMManager) Unregister(tenant string, wft v1alpha1.WorkflowTrigger) error {
var wftName, secretName, repo = wft.Name, wft.Spec.SCM.Secret, wft.Spec.SCM.Repo
log.Infof("start to unregister webhook for %s/%s , %s", secretName, repo, wftName)
o.mutex.Lock()
defer o.mutex.Unlock()
wfts, err := ListSCMWfts(tenant, repo, secretName)
if err != nil {
return err
}
if len(wfts.Items) > 1 {
log.Infof("there are other wfts using the webhook %s/%s, skip deleting, using wfts length: %d", repo, secretName, len(wfts.Items))
return nil
}
log.Infof("start to delete scm webhook %s/%s for wft %s", secretName, repo, wftName)
secret, err := handler.K8sClient.CoreV1().Secrets(common.TenantNamespace(tenant)).Get(
secretName, metav1.GetOptions{})
if err != nil {
return cerr.ConvertK8sError(err)
}
log.Infof("Delete webhook for repo %s", repo)
integration, err := in.FromSecret(secret)
if err != nil {
log.Error(err)
return err
}
err = deleteSCMWebhook(integration.Spec.SCM, tenant, secretName, repo)
if err != nil {
log.Error("delete webhook error:%v", err)
}
return nil
}
// deleteSCMWebhook deletes webhook from SCM repo.
func deleteSCMWebhook(scmSource *api.SCMSource, tenant, secret, repo string) error {
sp, err := scm.GetSCMProvider(scmSource)
if err != nil {
log.Errorf("Fail to get SCM provider for %s", scmSource.Server)
return err
}
return sp.DeleteWebhook(repo, generateWebhookURL(tenant, secret))
}
// LabelSCMTrigger add labels about scm trigger
func LabelSCMTrigger(wft *v1alpha1.WorkflowTrigger) {
if wft.Labels == nil {
wft.Labels = make(map[string]string)
}
wft.Labels[meta.LabelWftEventSource] = wft.Spec.SCM.Secret
}
// ListSCMWfts list all related SCM type workflow triggers
func ListSCMWfts(tenant, repo, integration string) (*v1alpha1.WorkflowTriggerList, error) {
labelMap := make(map[string]string)
// Did not use repo as a label since repo length may greater than the label length limit 64.
if integration != "" {
labelMap[meta.LabelWftEventSource] = integration
}
listOption := metav1.ListOptions{
LabelSelector: labels.Set(labelMap).String(),
}
originWfts, err := handler.K8sClient.CycloneV1alpha1().WorkflowTriggers(common.TenantNamespace(tenant)).List(listOption)
if err != nil {
return nil, err
}
wfts := originWfts.DeepCopy()
wfts.Items = make([]v1alpha1.WorkflowTrigger, 0)
for _, wft := range originWfts.Items {
if wft.Spec.SCM.Repo == repo {
wfts.Items = append(wfts.Items, wft)
}
}
return wfts, nil
}