extract captions to const

pkg/config/app_config.go

@@ -22,6 +22,11 @@ import (
 	"github.com/jesseduffield/yaml"
 )
 
+const (
+	CPUCaption    = "CPU (%)"
+	MemoryCaption = "Memory (%)"
+)
+
 // UserConfig holds all of the user-configurable options
 type UserConfig struct {
 	// Gui is for configuring visual things like colors and whether we show or
@@ -460,12 +465,12 @@ func GetDefaultConfig() UserConfig {
 			MaxDuration: duration,
 			Graphs: []GraphConfig{
 				{
-					Caption:  "CPU (%)",
+					Caption:  CPUCaption,
 					StatPath: "DerivedStats.CPUPercentage",
 					Color:    "cyan",
 				},
 				{
-					Caption:  "Memory (%)",
+					Caption:  MemoryCaption,
 					StatPath: "DerivedStats.MemoryPercentage",
 					Color:    "green",
 				},

pkg/gui/presentation/container_stats.go

@@ -93,14 +93,14 @@ func plotGraph(container *commands.Container, spec config.GraphConfig, width int
 	memoryLimit := utils.FormatDecimalBytes(int(container.StatHistory[dataLength-1].DerivedStats.MemoryLimit))
 	var caption string
 	switch spec.Caption {
-	case "CPU (%)":
+	case config.CPUCaption:
 		caption = fmt.Sprintf(
 			"%s: %0.2f (%v)",
 			spec.Caption,
 			data[dataLength-1],
 			time.Since(container.StatHistory[0].RecordedAt).Round(time.Second),
 		)
-	case "Memory (%)":
+	case config.MemoryCaption:
 		caption = fmt.Sprintf(
 			"%s: %s / %s (%0.2f) (%v)",
 			spec.Caption,