feat(cli,sdk): add listen cds events (#3994)

Co-Authored-By: sguiheux <[email protected]>

Author: sguiheux

cli/cdsctl/events.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+
+	"github.com/spf13/cobra"
+
+	"github.com/ovh/cds/cli"
+	"github.com/ovh/cds/sdk"
+	"github.com/ovh/cds/sdk/cdsclient"
+)
+
+var eventsCmd = cli.Command{
+	Name:  "events",
+	Short: "Listen CDS Events",
+}
+
+func events() *cobra.Command {
+	return cli.NewCommand(eventsCmd, nil, []*cobra.Command{
+		cli.NewCommand(eventsListenCmd, eventsListenRun, nil, withAllCommandModifiers()...),
+	})
+}
+
+var eventsListenCmd = cli.Command{
+	Name:  "listen",
+	Short: "Listen CDS events",
+}
+
+func eventsListenRun(v cli.Values) error {
+	ctx := context.Background()
+	chanSSE := make(chan cdsclient.SSEvent)
+
+	sdk.GoRoutine(ctx, "EventsListenCmd", func(ctx context.Context) {
+		client.EventsListen(ctx, chanSSE)
+	})
+
+	for {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case evt := <-chanSSE:
+			var e sdk.Event
+			content, _ := ioutil.ReadAll(evt.Data)
+			_ = json.Unmarshal(content, &e)
+			if e.EventType == "" {
+				continue
+			}
+			fmt.Printf("%s: %s %s %s\n", e.EventType, e.ProjectKey, e.WorkflowName, e.Status)
+		}
+	}
+}

cli/cdsctl/main.go

@@ -31,6 +31,7 @@ func main() {
 		signup(),
 		application(),
 		environment(),
+		events(),
 		pipeline(),
 		group(),
 		health(),

sdk/cdsclient/client_events.go

@@ -0,0 +1,16 @@
+package cdsclient
+
+import (
+	"context"
+	"log"
+	"time"
+)
+
+func (c *client) EventsListen(ctx context.Context, chanSSEvt chan<- SSEvent) {
+	for ctx.Err() == nil {
+		if err := c.RequestSSEGet(ctx, "/events", chanSSEvt); err != nil {
+			log.Println("QueuePolling", err)
+		}
+		time.Sleep(1 * time.Second)
+	}
+}

sdk/cdsclient/interface.go

@@ -130,6 +130,12 @@ type EnvironmentVariableClient interface {
 	EnvironmentVariableUpdate(projectKey string, envName string, variable *sdk.Variable) error
 }
 
+// EventsClient listen SSE Events from CDS API
+type EventsClient interface {
+	// Must be  run in a go routine
+	EventsListen(ctx context.Context, chanSSEvt chan<- SSEvent)
+}
+
 // DownloadClient exposes download related functions
 type DownloadClient interface {
 	Download() ([]sdk.Download, error)
@@ -336,6 +342,7 @@ type Interface interface {
 	ConfigUser() (map[string]string, error)
 	DownloadClient
 	EnvironmentClient
+	EventsClient
 	ExportImportInterface
 	GroupClient
 	GRPCPluginsClient