allow showing TOP of a container/service

pkg/commands/container.go

@@ -418,3 +418,13 @@ func (c *Container) TTYLogsCommand() *exec.Cmd {
 func (c *Container) Inspect() (types.ContainerJSON, error) {
 	return c.Client.ContainerInspect(context.Background(), c.ID)
 }
+
+// RenderTop returns details about the container
+func (c *Container) RenderTop() (string, error) {
+	result, err := c.Client.ContainerTop(context.Background(), c.ID, []string{})
+	if err != nil {
+		return "", err
+	}
+
+	return utils.RenderTable(append([][]string{result.Titles}, result.Processes...))
+}

pkg/commands/service.go

@@ -78,3 +78,14 @@ func (s *Service) ViewLogs() (*exec.Cmd, error) {
 
 	return cmd, nil
 }
+
+// RenderTop renders the process list of the service
+func (s *Service) RenderTop() (string, error) {
+	templateString := s.OSCommand.Config.UserConfig.CommandTemplates.ServiceTop
+	command := utils.ApplyTemplate(
+		templateString,
+		s.DockerCommand.NewCommandObject(CommandObject{Service: s}),
+	)
+
+	return s.OSCommand.RunCommandWithOutput(command)
+}

pkg/config/app_config.go

@@ -118,6 +118,7 @@ type CommandTemplatesConfig struct {
 	ViewAllLogs              string `yaml:"viewAlLogs,omitempty"`
 	DockerComposeConfig      string `yaml:"dockerComposeConfig,omitempty"`
 	CheckDockerComposeConfig string `yaml:"checkDockerComposeConfig,omitempty"`
+	ServiceTop               string `yaml:"serviceTop,omitempty"`
 }
 
 type OSConfig struct {
@@ -188,6 +189,7 @@ func GetDefaultConfig() UserConfig {
 			ContainerLogs:            "docker logs --timestamps --follow --tail=100 {{ .Container.ID }}",
 			ViewContainerLogs:        "docker logs --timestamps --follow --tail=100 {{ .Container.ID }}",
 			ContainerTTYLogs:         "docker logs --follow --tail=100 {{ .Container.ID }}",
+			ServiceTop:               "{{ .DockerCompose }} top {{ .Service.Name }}",
 		},
 		CustomCommands: CustomCommands{
 			Containers: []CustomCommand{

pkg/gui/containers_panel.go

@@ -18,11 +18,11 @@ import (
 // list panel functions
 
 func (gui *Gui) getContainerContexts() []string {
-	return []string{"logs", "stats", "config"}
+	return []string{"logs", "stats", "config", "top"}
 }
 
 func (gui *Gui) getContainerContextTitles() []string {
-	return []string{gui.Tr.LogsTitle, gui.Tr.StatsTitle, gui.Tr.ConfigTitle}
+	return []string{gui.Tr.LogsTitle, gui.Tr.StatsTitle, gui.Tr.ConfigTitle, gui.Tr.TopTitle}
 }
 
 func (gui *Gui) getSelectedContainer() (*commands.Container, error) {
@@ -101,6 +101,10 @@ func (gui *Gui) handleContainerSelect(g *gocui.Gui, v *gocui.View) error {
 		if err := gui.renderContainerStats(container); err != nil {
 			return err
 		}
+	case "top":
+		if err := gui.renderContainerTop(container); err != nil {
+			return err
+		}
 	default:
 		return errors.New("Unknown context for containers panel")
 	}
@@ -142,6 +146,21 @@ func (gui *Gui) renderContainerStats(container *commands.Container) error {
 	})
 }
 
+func (gui *Gui) renderContainerTop(container *commands.Container) error {
+	mainView := gui.getMainView()
+	mainView.Autoscroll = false
+	mainView.Wrap = false
+
+	return gui.T.NewTickerTask(time.Second, func(stop chan struct{}) { gui.clearMainView() }, func(stop, notifyStopped chan struct{}) {
+		contents, err := container.RenderTop()
+		if err != nil {
+			gui.reRenderString(gui.g, "main", err.Error())
+		}
+
+		gui.reRenderString(gui.g, "main", contents)
+	})
+}
+
 func (gui *Gui) renderContainerLogs(container *commands.Container) error {
 	mainView := gui.getMainView()
 	mainView.Autoscroll = true

pkg/gui/services_panel.go

@@ -2,6 +2,7 @@ package gui
 
 import (
 	"fmt"
+	"time"
 
 	"github.com/fatih/color"
 	"github.com/go-errors/errors"
@@ -13,11 +14,11 @@ import (
 // list panel functions
 
 func (gui *Gui) getServiceContexts() []string {
-	return []string{"logs", "stats", "container-config"}
+	return []string{"logs", "stats", "container-config", "top"}
 }
 
 func (gui *Gui) getServiceContextTitles() []string {
-	return []string{gui.Tr.LogsTitle, gui.Tr.StatsTitle, gui.Tr.ContainerConfigTitle}
+	return []string{gui.Tr.LogsTitle, gui.Tr.StatsTitle, gui.Tr.ContainerConfigTitle, gui.Tr.TopTitle}
 }
 
 func (gui *Gui) getSelectedService() (*commands.Service, error) {
@@ -95,6 +96,10 @@ func (gui *Gui) handleServiceSelect(g *gocui.Gui, v *gocui.View) error {
 		if err := gui.renderContainerConfig(service.Container); err != nil {
 			return err
 		}
+	case "top":
+		if err := gui.renderServiceTop(service); err != nil {
+			return err
+		}
 	default:
 		return errors.New("Unknown context for services panel")
 	}
@@ -110,6 +115,21 @@ func (gui *Gui) renderServiceStats(service *commands.Service) error {
 	return gui.renderContainerStats(service.Container)
 }
 
+func (gui *Gui) renderServiceTop(service *commands.Service) error {
+	mainView := gui.getMainView()
+	mainView.Autoscroll = false
+	mainView.Wrap = false
+
+	return gui.T.NewTickerTask(time.Second, func(stop chan struct{}) { gui.clearMainView() }, func(stop, notifyStopped chan struct{}) {
+		contents, err := service.RenderTop()
+		if err != nil {
+			gui.reRenderString(gui.g, "main", err.Error())
+		}
+
+		gui.reRenderString(gui.g, "main", contents)
+	})
+}
+
 func (gui *Gui) renderServiceLogs(service *commands.Service) error {
 	service, err := gui.getSelectedService()
 	if err != nil {

pkg/i18n/english.go

@@ -44,6 +44,7 @@ type TranslationSet struct {
 	ServicesTitle                              string
 	ContainersTitle                            string
 	StandaloneContainersTitle                  string
+	TopTitle                                   string
 	ImagesTitle                                string
 	VolumesTitle                               string
 	NoContainers                               string
@@ -128,6 +129,7 @@ func englishSet() TranslationSet {
 		ErrorTitle:                "Error",
 		LogsTitle:                 "Logs",
 		ConfigTitle:               "Config",
+		TopTitle:                  "Top",
 		StatsTitle:                "Stats",
 		CreditsTitle:              "About",
 		ContainerConfigTitle:      "Container Config",

pkg/utils/utils.go

@@ -157,6 +157,11 @@ func renderDisplayableList(items []Displayable, config RenderListConfig) (string
 		stringArrays = append([][]string{config.Header}, stringArrays...)
 	}
 
+	return RenderTable(stringArrays)
+}
+
+// RenderTable takes an array of string arrays and returns a table containing the values
+func RenderTable(stringArrays [][]string) (string, error) {
 	if !displayArraysAligned(stringArrays) {
 		return "", errors.New("Each item must return the same number of strings to display")
 	}