Show stash name for selected stash (#4673)

- **PR Description**

In the Stash panel, show information about the selected stash above the
diff of the stash in the main view. This is useful for stash entries
with very long names that are not fully visible in the Stash panel.

Fixes #4662.

pkg/gui/controllers/files_controller.go

@@ -262,15 +262,14 @@ func (self *FilesController) GetOnRenderToMain() func() {
 				}
 				if node.File.ShortStatus == "DU" || node.File.ShortStatus == "UD" {
 					cmdObj := self.c.Git().Diff.DiffCmdObj([]string{"--base", "--", node.GetPath()})
-					task := types.NewRunPtyTask(cmdObj.GetCmd())
+					prefix := message + "\n\n"
-					task.Prefix = message + "\n\n"
 					if node.File.ShortStatus == "DU" {
-						task.Prefix += self.c.Tr.MergeConflictIncomingDiff
+						prefix += self.c.Tr.MergeConflictIncomingDiff
 					} else {
-						task.Prefix += self.c.Tr.MergeConflictCurrentDiff
+						prefix += self.c.Tr.MergeConflictCurrentDiff
 					}
-					task.Prefix += "\n\n"
+					prefix += "\n\n"
-					opts.Main.Task = task
+					opts.Main.Task = types.NewRunPtyTaskWithPrefix(cmdObj.GetCmd(), prefix)
 				} else {
 					opts.Main.Task = types.NewRenderStringTask(message)
 				}

pkg/gui/controllers/helpers/diff_helper.go

@@ -61,9 +61,8 @@ func (self *DiffHelper) GetUpdateTaskForRenderingCommitsDiff(commit *models.Comm
 			args = append(args, path)
 		}
 		cmdObj := self.c.Git().Diff.DiffCmdObj(args)
-		task := types.NewRunPtyTask(cmdObj.GetCmd())
+		prefix := style.FgYellow.Sprintf("%s %s-%s\n\n", self.c.Tr.ShowingDiffForRange, from.ShortRefName(), to.ShortRefName())
-		task.Prefix = style.FgYellow.Sprintf("%s %s-%s\n\n", self.c.Tr.ShowingDiffForRange, from.ShortRefName(), to.ShortRefName())
+		return types.NewRunPtyTaskWithPrefix(cmdObj.GetCmd(), prefix)
-		return task
 	}
 
 	cmdObj := self.c.Git().Commit.ShowCmdObj(commit.Hash(), self.c.Modes().Filtering.GetPath())
@@ -79,12 +78,12 @@ func (self *DiffHelper) ExitDiffMode() error {
 func (self *DiffHelper) RenderDiff() {
 	args := self.DiffArgs()
 	cmdObj := self.c.Git().Diff.DiffCmdObj(args)
-	task := types.NewRunPtyTask(cmdObj.GetCmd())
+	prefix := style.FgMagenta.Sprintf(
-	task.Prefix = style.FgMagenta.Sprintf(
 		"%s %s\n\n",
 		self.c.Tr.ShowingGitDiff,
 		"git diff "+strings.Join(args, " "),
 	)
+	task := types.NewRunPtyTaskWithPrefix(cmdObj.GetCmd(), prefix)
 
 	self.c.RenderToMainViews(types.RefreshMainOpts{
 		Pair: self.c.MainViewPairs().Normal,

pkg/gui/controllers/stash_controller.go

@@ -3,6 +3,7 @@ package controllers
 import (
 	"github.com/jesseduffield/lazygit/pkg/commands/models"
 	"github.com/jesseduffield/lazygit/pkg/gui/context"
+	"github.com/jesseduffield/lazygit/pkg/gui/style"
 	"github.com/jesseduffield/lazygit/pkg/gui/types"
 	"github.com/jesseduffield/lazygit/pkg/utils"
 )
@@ -82,8 +83,10 @@ func (self *StashController) GetOnRenderToMain() func() {
 			if stashEntry == nil {
 				task = types.NewRenderStringTask(self.c.Tr.NoStashEntries)
 			} else {
-				task = types.NewRunPtyTask(
+				prefix := style.FgYellow.Sprintf("%s\n\n", stashEntry.Description())
+				task = types.NewRunPtyTaskWithPrefix(
 					self.c.Git().Stash.ShowStashEntryCmdObj(stashEntry.Index).GetCmd(),
+					prefix,
 				)
 			}
 

pkg/gui/types/rendering.go

@@ -94,3 +94,7 @@ func (t *RunPtyTask) IsUpdateTask() {}
 func NewRunPtyTask(cmd *exec.Cmd) *RunPtyTask {
 	return &RunPtyTask{Cmd: cmd}
 }
+
+func NewRunPtyTaskWithPrefix(cmd *exec.Cmd, prefix string) *RunPtyTask {
+	return &RunPtyTask{Cmd: cmd, Prefix: prefix}
+}