fix this insane CPU usage issue

pkg/commands/container.go

@@ -9,6 +9,7 @@ import (
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/client"
 	"github.com/fatih/color"
+	"github.com/go-errors/errors"
 	"github.com/jesseduffield/lazydocker/pkg/utils"
 	"github.com/sirupsen/logrus"
 	"golang.org/x/xerrors"
@@ -298,9 +299,14 @@ func (c *Container) RestartService() error {
 }
 
 // Attach attaches the container
-func (c *Container) Attach() *exec.Cmd {
+func (c *Container) Attach() (*exec.Cmd, error) {
+	// verify that we can in fact attach to this container
+	if !c.Details.Config.AttachStdin {
+		return nil, errors.New("Container does not support attaching. You must either run the service with the '-it' flag or use `stdin_open: true, tty: true` in the docker-compose.yml file")
+	}
+
 	cmd := c.OSCommand.PrepareSubProcess("docker", "attach", "--sig-proxy=false", c.ID)
-	return cmd
+	return cmd, nil
 }
 
 // Top returns process information

pkg/commands/docker.go

@@ -78,16 +78,22 @@ func (c *DockerCommand) UpdateContainerStats(containers []*Container) ([]*Contai
 }
 
 // GetContainersAndServices returns a slice of docker containers
-func (c *DockerCommand) GetContainersAndServices() ([]*Container, []*Service, error) {
+func (c *DockerCommand) GetContainersAndServices(currentServices []*Service) ([]*Container, []*Service, error) {
 
 	containers, err := c.GetContainers()
 	if err != nil {
 		return nil, nil, err
 	}
 
-	services, err := c.GetServices()
-	if err != nil {
-		return nil, nil, err
+	var services []*Service
+	// we only need to get these services once because they won't change in the runtime of the program
+	if currentServices != nil {
+		services = currentServices
+	} else {
+		services, err = c.GetServices()
+		if err != nil {
+			return nil, nil, err
+		}
 	}
 
 	// find out which services have corresponding containers and assign them
@@ -170,8 +176,10 @@ func (c *DockerCommand) GetServices() ([]*Service, error) {
 	for i, str := range lines {
 		arr := strings.Split(str, " ")
 		services[i] = &Service{
-			Name: arr[0],
-			ID:   arr[1],
+			Name:      arr[0],
+			ID:        arr[1],
+			OSCommand: c.OSCommand,
+			Log:       c.Log,
 		}
 	}
 

pkg/commands/service.go

@@ -11,12 +11,11 @@ import (
 
 // Service : A docker Service
 type Service struct {
-	Name          string
-	ID            string
-	DisplayString string
-	OSCommand     *OSCommand
-	Log           *logrus.Entry
-	Container     *Container
+	Name      string
+	ID        string
+	OSCommand *OSCommand
+	Log       *logrus.Entry
+	Container *Container
 }
 
 // GetDisplayStrings returns the dispaly string of Container
@@ -50,7 +49,7 @@ func (s *Service) Restart() error {
 }
 
 // Attach attaches to the service
-func (s *Service) Attach() *exec.Cmd {
+func (s *Service) Attach() (*exec.Cmd, error) {
 	// TODO: if you have a custom command for attaching to a service here is the place to use it
 
 	return s.Container.Attach()

pkg/config/app_config.go

@@ -102,6 +102,7 @@ type CommandTemplatesConfig struct {
 	RestartService string `yaml:"restartService,omitempty"`
 	DockerCompose  string `yaml:"dockerCompose,omitempty"`
 	StopService    string `yaml:"stopService,omitempty"`
+	ServiceLogs    string `yaml:"serviceLogs,omitempty"`
 }
 
 type OSConfig struct {
@@ -132,6 +133,7 @@ func GetDefaultConfig() UserConfig {
 			RestartService: "docker-compose restart {{ .Name }}",
 			DockerCompose:  "apdev compose",
 			StopService:    "apdev stop {{ .Name }}",
+			ServiceLogs:    "apdev logs {{ .Name }}",
 		},
 		OS: GetPlatformDefaultConfig(),
 		Update: UpdateConfig{

pkg/gui/containers_panel.go

@@ -220,13 +220,11 @@ func (gui *Gui) renderLogsForTTYContainer(mainView *gocui.View, container *comma
 	}
 
 	go func() {
-		for {
-			s := bufio.NewScanner(r)
-			s.Split(bufio.ScanLines)
-			for s.Scan() {
-				// I might put a check on the stopped channel here. Would mean more code duplication though
-				mainView.Write(append(s.Bytes(), '\n'))
-			}
+		s := bufio.NewScanner(r)
+		s.Split(bufio.ScanLines)
+		for s.Scan() {
+			// I might put a check on the stopped channel here. Would mean more code duplication though
+			mainView.Write(append(s.Bytes(), '\n'))
 		}
 	}()
 
@@ -297,7 +295,7 @@ func (gui *Gui) refreshContainersAndServices() error {
 }
 
 func (gui *Gui) refreshStateContainersAndServices() error {
-	containers, services, err := gui.DockerCommand.GetContainersAndServices()
+	containers, services, err := gui.DockerCommand.GetContainersAndServices(gui.State.Services)
 	if err != nil {
 		return err
 	}
@@ -457,7 +455,10 @@ func (gui *Gui) handleContainerAttach(g *gocui.Gui, v *gocui.View) error {
 		return nil
 	}
 
-	c := container.Attach()
+	c, err := container.Attach()
+	if err != nil {
+		return gui.createErrorPanel(gui.g, err.Error())
+	}
 
 	gui.SubProcess = c
 	return gui.Errors.ErrSubProcess

pkg/gui/gui.go

@@ -155,7 +155,7 @@ func NewGui(log *logrus.Entry, dockerCommand *commands.DockerCommand, oSCommand
 		Config:        config,
 		Tr:            tr,
 		statusManager: &statusManager{},
-		T:             tasks.NewTaskManager(),
+		T:             tasks.NewTaskManager(log),
 	}
 
 	gui.GenerateSentinelErrors()
@@ -415,7 +415,7 @@ func (gui *Gui) layout(g *gocui.Gui) error {
 			return err
 		}
 
-		if err := gui.switchFocus(gui.g, nil, gui.getContainersView()); err != nil {
+		if err := gui.switchFocus(gui.g, nil, gui.getServicesView()); err != nil {
 			return err
 		}
 	}

pkg/gui/services_panel.go

@@ -119,7 +119,16 @@ func (gui *Gui) renderServiceStats(mainView *gocui.View, service *commands.Servi
 }
 
 func (gui *Gui) renderServiceLogs(mainView *gocui.View, service *commands.Service) error {
-	return nil
+	service, err := gui.getSelectedService(gui.g)
+	if err != nil {
+		return nil
+	}
+
+	if service.Container == nil {
+		return nil
+	}
+
+	return gui.renderContainerLogs(gui.getMainView(), service.Container)
 }
 
 func (gui *Gui) handleServicesNextLine(g *gocui.Gui, v *gocui.View) error {
@@ -255,7 +264,10 @@ func (gui *Gui) handleServiceAttach(g *gocui.Gui, v *gocui.View) error {
 		return nil
 	}
 
-	c := service.Attach()
+	c, err := service.Attach()
+	if err != nil {
+		return gui.createErrorPanel(gui.g, err.Error())
+	}
 
 	gui.SubProcess = c
 	return gui.Errors.ErrSubProcess

pkg/gui/status_panel.go

@@ -7,15 +7,10 @@ import (
 	"github.com/jesseduffield/gocui"
 )
 
-func (gui *Gui) refreshStatus(g *gocui.Gui) error {
-	v, err := g.View("status")
-	if err != nil {
-		panic(err)
-	}
-	// for some reason if this isn't wrapped in an update the clear seems to
-	// be applied after the other things or something like that; the panel's
-	// contents end up cleared
-	g.Update(func(*gocui.Gui) error {
+func (gui *Gui) refreshStatus() error {
+	v := gui.getStatusView()
+
+	gui.g.Update(func(*gocui.Gui) error {
 		v.Clear()
 		fmt.Fprint(v, "lazydocker")
 		return nil

pkg/gui/view_helpers.go

@@ -19,6 +19,10 @@ func (gui *Gui) refreshSidePanels(g *gocui.Gui) error {
 	if err := gui.refreshImages(); err != nil {
 		return err
 	}
+	if err := gui.refreshStatus(); err != nil {
+		return err
+	}
+
 	return nil
 }
 
@@ -245,6 +249,11 @@ func (gui *Gui) getMainView() *gocui.View {
 	return v
 }
 
+func (gui *Gui) getStatusView() *gocui.View {
+	v, _ := gui.g.View("status")
+	return v
+}
+
 func (gui *Gui) trimmedContent(v *gocui.View) string {
 	return strings.TrimSpace(v.Buffer())
 }

pkg/tasks/tasks.go

@@ -1,27 +1,38 @@
 package tasks
 
-import "sync"
+import (
+	"sync"
+
+	"github.com/sirupsen/logrus"
+)
 
 type TaskManager struct {
 	waitingTasks []*Task
 	currentTask  *Task
 	waitingMutex sync.Mutex
+	Log          *logrus.Entry
 }
 
 type Task struct {
 	stop          chan struct{}
 	notifyStopped chan struct{}
+	Log           *logrus.Entry
 }
 
-func NewTaskManager() *TaskManager {
-	return &TaskManager{}
+func NewTaskManager(log *logrus.Entry) *TaskManager {
+	return &TaskManager{Log: log}
 }
 
 func (t *TaskManager) NewTask(f func(stop chan struct{})) error {
+	t.Log.Warn("new task")
+
 	t.waitingMutex.Lock()
 	defer t.waitingMutex.Unlock()
 
+	t.Log.Warn("locked mutex")
+
 	if t.currentTask != nil {
+		t.Log.Warn("about to ask current task to stop")
 		t.currentTask.Stop()
 	}
 
@@ -31,9 +42,11 @@ func (t *TaskManager) NewTask(f func(stop chan struct{})) error {
 	t.currentTask = &Task{
 		stop:          stop,
 		notifyStopped: notifyStopped,
+		Log:           t.Log,
 	}
 
 	go func() {
+		t.Log.Warn("running new task")
 		f(stop)
 		notifyStopped <- struct{}{}
 	}()
@@ -44,5 +57,6 @@ func (t *TaskManager) NewTask(f func(stop chan struct{})) error {
 func (t *Task) Stop() {
 	t.stop <- struct{}{}
 	<-t.notifyStopped
+	t.Log.Warn("task successfully stopped")
 	return
 }