feat: discord channels for test/deployment failure notifications (#67)

cd/manager/notifs/discord.go

@@ -88,25 +88,36 @@ func parseDiscordWebhookUrl(urlEnv string) (webhook.Client, error) {
 	return nil, nil
 }
 
-func webhooksForLabels(labels []string) ([]webhook.Client, error) {
+func webhooksForLabels(labels []string) ([]webhook.Client, []webhook.Client, error) {
 	webhooks := make([]webhook.Client, 0)
+	failureWebhooks := make([]webhook.Client, 0)
 	for _, label := range labels {
 		switch label {
 		case job.WorkflowJobLabel_Test:
 			if t, err := parseDiscordWebhookUrl("DISCORD_TESTS_WEBHOOK"); err != nil {
-				return nil, err
+				return nil, nil, err
 			} else {
 				webhooks = append(webhooks, t)
 			}
+			if f, err := parseDiscordWebhookUrl("DISCORD_TEST_FAILURES_WEBHOOK"); err != nil {
+				return nil, nil, err
+			} else {
+				failureWebhooks = append(failureWebhooks, f)
+			}
 		case job.WorkflowJobLabel_Deploy:
 			if t, err := parseDiscordWebhookUrl("DISCORD_DEPLOYMENTS_WEBHOOK"); err != nil {
-				return nil, err
+				return nil, nil, err
 			} else {
 				webhooks = append(webhooks, t)
 			}
+			if f, err := parseDiscordWebhookUrl("DISCORD_DEPLOYMENT_FAILURES_WEBHOOK"); err != nil {
+				return nil, nil, err
+			} else {
+				failureWebhooks = append(failureWebhooks, f)
+			}
 		}
 	}
-	return webhooks, nil
+	return webhooks, failureWebhooks, nil
 }
 
 func (n JobNotifs) NotifyJob(jobs ...job.JobState) {

cd/manager/notifs/workflow.go

@@ -19,25 +19,29 @@ const (
 )
 
 type workflowNotif struct {
-	state            job.JobState
-	workflow         job.Workflow
-	workflowWebhooks []webhook.Client
+	state           job.JobState
+	workflow        job.Workflow
+	webhooks        []webhook.Client
+	failureWebhooks []webhook.Client
 }
 
 func newWorkflowNotif(jobState job.JobState) (jobNotif, error) {
 	if workflow, err := job.CreateWorkflowJob(jobState); err != nil {
 		return nil, err
-	} else if webhooks, err := webhooksForLabels(workflow.Labels); err != nil {
+	} else if webhooks, failureWebhooks, err := webhooksForLabels(workflow.Labels); err != nil {
 		return nil, err
 	} else {
-		return &workflowNotif{jobState, workflow, webhooks}, nil
+		return &workflowNotif{jobState, workflow, webhooks, failureWebhooks}, nil
 	}
 }
 
 func (w workflowNotif) getChannels() []webhook.Client {
+	if w.state.Stage == job.JobStage_Failed {
+		return w.failureWebhooks
+	} else
 	// Skip "started" notifications so that the channel doesn't get too noisy
 	if w.state.Stage != job.JobStage_Started {
-		return w.workflowWebhooks
+		return w.webhooks
 	}
 	return nil
 }