feat: add tag command

Signed-off-by: Jacob Lorenzen <jacob@lorenzen.me>

pkg/commands/image.go

@@ -2,6 +2,7 @@ package commands
 
 import (
 	"context"
+	"fmt"
 	"strings"
 
 	"github.com/docker/docker/api/types/image"
@@ -143,3 +144,8 @@ func (c *DockerCommand) PruneImages() error {
 	_, err := c.Client.ImagesPrune(context.Background(), filters.Args{})
 	return err
 }
+
+func (i *Image) String() string {
+    return fmt.Sprintf("%s:%s", i.Name, i.Tag)
+}
+

pkg/gui/confirmation_panel.go

@@ -62,13 +62,15 @@ func (gui *Gui) getConfirmationPanelDimensions(wrap bool, prompt string) (int, i
 		height/2 + panelHeight/2
 }
 
-func (gui *Gui) createPromptPanel(title string, handleConfirm func(*gocui.Gui, *gocui.View) error) error {
+func (gui *Gui) createPromptPanel(title string, prompt string, handleConfirm func(*gocui.Gui, *gocui.View) error) error {
 	gui.onNewPopupPanel()
-	err := gui.prepareConfirmationPanel(title, "")
+	err := gui.prepareConfirmationPanel(title, prompt)
 	if err != nil {
 		return err
 	}
 	gui.Views.Confirmation.Editable = true
+	gui.Views.Confirmation.SetContent(prompt)
+	gui.Views.Confirmation.SetCursor(len(prompt), 0)
 	return gui.setKeyBindings(gui.g, handleConfirm, nil)
 }
 

pkg/gui/gui.go

@@ -443,7 +443,7 @@ func (gui *Gui) openFile(filename string) error {
 }
 
 func (gui *Gui) handleCustomCommand(g *gocui.Gui, v *gocui.View) error {
-	return gui.createPromptPanel(gui.Tr.CustomCommandTitle, func(g *gocui.Gui, v *gocui.View) error {
+	return gui.createPromptPanel(gui.Tr.CustomCommandTitle, "", func(g *gocui.Gui, v *gocui.View) error {
 		command := gui.trimmedContent(v)
 		return gui.runSubprocess(gui.OSCommand.RunCustomCommand(command))
 	})

pkg/gui/images_panel.go

@@ -219,3 +219,29 @@ func (gui *Gui) handleImagesBulkCommand(g *gocui.Gui, v *gocui.View) error {
 
 	return gui.createBulkCommandMenu(bulkCommands, commandObject)
 }
+
+func (gui *Gui) handleImagesTagCommand(g *gocui.Gui, v *gocui.View) error {
+	image, err := gui.Panels.Images.GetSelectedItem()
+	if err != nil {
+		return nil
+	}
+
+	return gui.createPromptPanel(gui.Tr.NewTagCommand, image.String(), func(g *gocui.Gui, v *gocui.View) error {
+		newTag := gui.trimmedContent(v)
+
+		var cmd string
+		// if the user has provided a tag with a colon, we assume they've provided a full tag
+		if strings.Contains(newTag, ":") {
+			cmd = "docker tag " + image.String() + " " + newTag
+		} else {
+			cmd = "docker tag " + image.String() + " " + image.Name + ":" + newTag
+		}
+
+		err := gui.runSubprocess(gui.OSCommand.RunCustomCommand(cmd))
+		if err != nil {
+			return gui.createErrorPanel(err.Error())
+		}
+
+		return gui.reloadImages()
+	})
+}

pkg/gui/keybindings.go

@@ -388,6 +388,13 @@ func (gui *Gui) GetInitialKeybindings() []*Binding {
 			Handler:     gui.handleImagesBulkCommand,
 			Description: gui.Tr.ViewBulkCommands,
 		},
+		{
+			ViewName:    "images",
+			Key:         't',
+			Modifier:    gocui.ModNone,
+			Handler:     gui.handleImagesTagCommand,
+			Description: gui.Tr.ViewTagCommands,
+		},
 		{
 			ViewName:    "volumes",
 			Key:         'c',

pkg/i18n/english.go

@@ -106,6 +106,8 @@ type TranslationSet struct {
 	ExecShell                   string
 	RunCustomCommand            string
 	ViewBulkCommands            string
+	ViewTagCommands             string
+	NewTagCommand               string
 	FilterList                  string
 	OpenInBrowser               string
 	SortContainersByState       string
@@ -206,6 +208,8 @@ func englishSet() TranslationSet {
 		ExecShell:                   "exec shell",
 		RunCustomCommand:            "run predefined custom command",
 		ViewBulkCommands:            "view bulk commands",
+		ViewTagCommands:             "view tag commands",
+		NewTagCommand:               "new tag",
 		FilterList:                  "filter list",
 		OpenInBrowser:               "open in browser (first port is http)",
 		SortContainersByState:       "sort containers by state",