add destroy command

Makefile

@@ -5,7 +5,7 @@ run: lint
 
 build: lint
 	@echo "building binary..."
-	@go build -o $(BIN_NAME) -race main.go && echo "$(BIN_NAME) built"
+	@go build -o $(BIN_NAME) main.go && echo "$(BIN_NAME) built"
 
 install:
 	@$(shell whereis $(BIN_NAME) | cut -d ' ' -f2 | xargs rm -f)

README.md

@@ -15,12 +15,12 @@ You have an Nginx instance in front of a Docker Swarm instance (ip are here for
 |docker swarm             |          |nginx                    |             
 |                         |          |                         |             
 |ip: 10.0.0.2             |          |ip: 10.0.0.1             |             
-|                         |          |                         | HTTP Request           
-|                         +----------+                         |<-----------
-|                         |          |                         |            
-|                         |          |                         |            
-|                         |          |                         |            
 |                         |          |                         |             
+| +------+    +------+    +----------+                         |<----------- 
+| |app1  |    |app2  |    |          |                         | HTTP request
+| |      |    |      |    |          |                         |             
+| |:8080 |    |:8081 |    |          |                         |             
+| +------+    +------+    |          |                         |             
 |                         |          |                         |             
 |                         |          |                         |             
 +-------------------------+          +-------------------------+             
@@ -120,14 +120,18 @@ The binary is then installed in your **$GOPATH/bin**.
 # you can then launch the program directly
 hmdeploy
 
-# if you want the deploy a specific project
+# if you want to deploy a specific project
 # use --path to point the project dir where `.homeserver` is located
 hmdeploy --path /path/my-project
+
+# if you want to undeploy a specific project
+# do not worry, volumes are preserved
+hmdeploy --path /path/my-project --destroy
 ```
 
 ## Next steps
 * Improve the CLI arguments
-* Destroy
+* ~~Destroy~~
 * post-install script
 * Deals with bugs
 

deployers/commons.go

@@ -16,6 +16,7 @@ type IDeployer interface {
 	Type() DeployerType
 	Deploy() error
 	Build() error
+	Destroy() error
 	Clear() error
 	Error() error
 	Done() <-chan struct{}
@@ -65,7 +66,7 @@ func newDeployer(ctx context.Context, type_ DeployerType, project *models.Projec
 
 func (d *deployer) setDone(err error) {
 	d.chDone <- struct{}{}
-	d.errFlag = err
+	d.errFlag = errors.Join(d.ctx.Err(), err)
 	if err != nil && d.fnCancel != nil {
 		d.fnCancel()
 	}
@@ -110,6 +111,10 @@ func (d *deployer) Done() <-chan struct{} {
 
 				timeout := time.NewTicker(GracefulTimeout)
 				tick := time.NewTicker(time.Second)
+
+				defer tick.Stop()
+				defer timeout.Stop()
+
 				for {
 					select {
 					case <-timeout.C:

deployers/nginx.go

@@ -70,7 +70,7 @@ func (nd *NginxDeployer) Build() error {
 
 	select {
 	case <-nd.ctx.Done():
-		nd.errFlag = ErrContextDone
+		nd.setDone(nil)
 		return fmt.Errorf("%w, build nginx archive skipped", ErrContextDone)
 	default:
 	}
@@ -94,7 +94,7 @@ func (nd *NginxDeployer) Deploy() (err error) {
 
 	select {
 	case <-nd.ctx.Done():
-		nd.errFlag = ErrContextDone
+		nd.setDone(nil)
 		return fmt.Errorf("%w, nginx deployment skipped", ErrContextDone)
 	default:
 	}
@@ -119,3 +119,33 @@ func (nd *NginxDeployer) Deploy() (err error) {
 
 	return err
 }
+
+func (nd *NginxDeployer) Destroy() (err error) {
+	nd.processing.Store(true)
+	defer nd.processing.Store(false)
+
+	select {
+	case <-nd.ctx.Done():
+		nd.setDone(nil)
+		return fmt.Errorf("%w, nginx destroy skipped", ErrContextDone)
+	default:
+	}
+
+	nginxConf := nd.project.Name + ".conf"
+
+	log.Info().Str("nginx", nginxConf).Msg("destroying nginx conf...")
+
+	_, err = nd.conn.Execute(
+		fmt.Sprintf(
+			"unlink /etc/nginx/sites-enabled/%s",
+			nginxConf,
+		),
+	)
+	nd.setDone(err)
+
+	if err == nil {
+		log.Info().Str("nginx", nginxConf).Msg("nginx conf successfully destroyed")
+	}
+
+	return err
+}

deployers/swarm.go

@@ -56,7 +56,9 @@ func (sd *SwarmDeployer) close() error {
 }
 
 func (sd *SwarmDeployer) clean() (err error) {
-	defer os.Remove(sd.archivePath) //nolint: errcheck // defered
+	if err := os.Remove(sd.archivePath); err != nil {
+		log.Err(err).Str("archive", sd.archivePath).Msg("unable to clean local swarm archive file")
+	}
 	_, err = sd.conn.Execute(
 		fmt.Sprintf("rm -f %s %s *.tar.gz *.tar", models.ComposeFile, models.EnvFile),
 	)
@@ -89,7 +91,7 @@ func (sd *SwarmDeployer) Build() error {
 
 	select {
 	case <-sd.ctx.Done():
-		sd.errFlag = ErrContextDone
+		sd.setDone(nil)
 		return fmt.Errorf("%w, swarm project build skipped", ErrContextDone)
 	default:
 	}
@@ -148,7 +150,7 @@ func (sd *SwarmDeployer) Deploy() error {
 
 	select {
 	case <-sd.ctx.Done():
-		sd.errFlag = ErrContextDone
+		sd.setDone(nil)
 		return fmt.Errorf("%w, swarm deployment skipped", ErrContextDone)
 	default:
 	}
@@ -186,3 +188,19 @@ func (sd *SwarmDeployer) Deploy() error {
 	sd.setDone(nil)
 	return nil
 }
+
+func (sd *SwarmDeployer) Destroy() error {
+	sd.processing.Store(true)
+	defer sd.processing.Store(false)
+
+	log.Info().Str("project", sd.project.Name).Msg("destroying swarm project...")
+	if _, err := sd.conn.Execute(fmt.Sprintf("docker stack rm %s", sd.project.Name)); err != nil {
+		sd.setDone(err)
+		return err
+	}
+
+	log.Info().Msg("swarm undeployment done with success")
+
+	sd.setDone(nil)
+	return nil
+}

main.go

@@ -136,7 +136,7 @@ func initDeployers(
 // generateTasksTree returns a list of linked `Task` to submit.
 //
 // It's here that all tasks are linked each other to provide the deployment ordering.
-func generateTasksTree(deployers []deployers.IDeployer) ([]*scheduler.Task, error) {
+func generateTasksTree(deployers []deployers.IDeployer, destroy bool) ([]*scheduler.Task, error) {
 	if len(deployers) != MaxDeployers {
 		return nil, fmt.Errorf("%w, deployers len should be equals to 2", ErrGenerateTasksTree)
 	}
@@ -146,6 +146,13 @@ func generateTasksTree(deployers []deployers.IDeployer) ([]*scheduler.Task, erro
 
 	tasks := []*scheduler.Task{}
 
+	if destroy {
+		swarmDestroy := scheduler.NewTask("swarm-destroy", sd.Destroy)
+		destroyTask := scheduler.NewTask("nginx-destroy", nd.Destroy, swarmDestroy)
+		tasks = append(tasks, destroyTask)
+		return tasks, nil
+	}
+
 	var swarmTask *scheduler.Task
 	if nd != nil {
 		deployNginx := scheduler.NewTask("nginx-deploy", nd.Deploy)
@@ -164,7 +171,11 @@ func generateTasksTree(deployers []deployers.IDeployer) ([]*scheduler.Task, erro
 //
 // After the completion, deployers `Clear` methods are executed to clean all ressources.
 // Then the scheduler is stopped to terminate the engine.
-func waitForCompletion(deployers []deployers.IDeployer, s *scheduler.Scheduler) error {
+func waitForCompletion(
+	deployers []deployers.IDeployer,
+	s *scheduler.Scheduler,
+	destroy bool,
+) error {
 	var wg sync.WaitGroup
 
 	for idx := range deployers {
@@ -183,9 +194,11 @@ func waitForCompletion(deployers []deployers.IDeployer, s *scheduler.Scheduler)
 	for idx := range deployers {
 		if d := deployers[idx]; d != nil {
 			errs = append(errs, d.Error())
+			if !destroy {
 				s.Submit(scheduler.NewTask(string(d.Type()), d.Clear)) //nolint: errcheck // TODO
 			}
 		}
+	}
 
 	s.Stop()
 	<-s.Done()
@@ -204,6 +217,7 @@ func main() {
 	log.Info().Msg("hmdeploy started")
 
 	projectDir := flag.String("path", ".", "define the .homeserver project root dir")
+	destroy := flag.Bool("destroy", false, "delete the deployed project")
 	flag.Parse()
 
 	hmmap, err := loadHMMap()
@@ -225,7 +239,7 @@ func main() {
 		log.Fatal().Err(err).Msg("unable to init deployers")
 	}
 
-	tasks, err := generateTasksTree(deployers)
+	tasks, err := generateTasksTree(deployers, *destroy)
 	if err != nil {
 		log.Fatal().Err(err).Msg("unable to generate tasks tree")
 	}
@@ -237,7 +251,7 @@ func main() {
 		tasks...,
 	)
 
-	if err := waitForCompletion(deployers, s); err != nil {
+	if err := waitForCompletion(deployers, s, *destroy); err != nil {
 		log.Fatal().
 			Err(err).
 			Str("name", project.Name).