Updating structs to use labels, adding tests for env stuff

flag.go

@@ -9,13 +9,21 @@ import (
 )
 
 // This flag enables bash-completion for all commands and subcommands
-var BashCompletionFlag = BoolFlag{"generate-bash-completion", "", ""}
+var BashCompletionFlag = BoolFlag{
+	Name: "generate-bash-completion",
+}
 
 // This flag prints the version for the application
-var VersionFlag = BoolFlag{"version, v", "print the version", ""}
+var VersionFlag = BoolFlag{
+	Name:  "version, v",
+	Usage: "print the version",
+}
 
 // This flag prints the help for all commands and subcommands
-var HelpFlag = BoolFlag{"help, h", "show help", ""}
+var HelpFlag = BoolFlag{
+	Name:  "help, h",
+	Usage: "show help",
+}
 
 // Flag is a common interface related to parsing flags in cli.
 // For more advanced flag parsing techniques, it is recomended that