Group string definitions and parse colors on intialization

We group templates and all the string variables separately and update the color tags in the init depending on if the output is a terminal

commands/cli/helptext.go

@@ -105,16 +105,22 @@ const shortHelpFormat = `USAGE:
 {{end}}
 `
 
-var usageTemplate *template.Template
-var longHelpTemplate *template.Template
-var shortHelpTemplate *template.Template
+var (
+	usageTemplate     *template.Template
+	longHelpTemplate  *template.Template
+	shortHelpTemplate *template.Template
+)
+
 var colorScheme c.Colorize
-var requiredArg string
-var subcommandPrefix string
-var optionalArg string
-var variadicArg string
-var optionFlag string
-var optionType string
+
+var (
+	requiredArg      = "[requiredArg]<%v>[DEFAULT]"
+	optionalArg      = "[optionalArg]<%v>[DEFAULT]"
+	variadicArg      = "[variadicArg]%v[DEFAULT]..."
+	optionFlag       = "[optionFlag]-%v[DEFAULT]"
+	optionType       = "[optionType]%v[DEFAULT]"
+	subcommandPrefix = "[USAGE]%v[DEFAULT]"
+)
 
 func init() {
 	colorScheme = c.Colorize{
@@ -135,12 +141,12 @@ func init() {
 		Disable: !isatty.IsTerminal(os.Stdout.Fd()),
 	}
 
-	requiredArg = colorScheme.Color("[requiredArg]<%v>[DEFAULT]")
-	optionalArg = colorScheme.Color("[optionalArg]<%v>[DEFAULT]")
-	variadicArg = colorScheme.Color("[variadicArg]%v[DEFAULT]...")
-	optionFlag = colorScheme.Color("[optionFlag]-%v[DEFAULT]")
-	optionType = colorScheme.Color("[optionType]%v[DEFAULT]")
-	subcommandPrefix = colorScheme.Color("[USAGE]%v[DEFAULT]")
+	requiredArg = colorScheme.Color(requiredArg)
+	optionalArg = colorScheme.Color(optionalArg)
+	variadicArg = colorScheme.Color(variadicArg)
+	optionFlag = colorScheme.Color(optionFlag)
+	optionType = colorScheme.Color(optionType)
+	subcommandPrefix = colorScheme.Color(subcommandPrefix)
 
 	usageTemplate = template.Must(template.New("usage").Parse(colorScheme.Color(usageFormat)))
 	longHelpTemplate = template.Must(usageTemplate.New("longHelp").Parse(colorScheme.Color(longHelpFormat)))