Stub out config sub-command

config_cmd.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/charmbracelet/charm/ui/common"
+	"github.com/spf13/cobra"
+)
+
+var configCmd = &cobra.Command{
+	Use:    "config",
+	Hidden: false,
+	Short:  "Edit the glow config file",
+	Long:   formatBlock(fmt.Sprintf("\n%s the glow config file. We’ll use EDITOR to determine which editor to use. If the config file doesn't exist, it will be created.", common.Keyword("Edit"))),
+	Args:   cobra.NoArgs,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if os.Getenv("EDITORS") == "" {
+			return errors.New("no EDITOR environment variable set")
+		}
+
+		return nil
+	},
+}

main.go

@@ -333,6 +333,8 @@ func init() {
 	stashCmd.PersistentFlags().StringVarP(&memo, "memo", "m", "", "memo/note for stashing")
 	rootCmd.AddCommand(stashCmd)
 
+	rootCmd.AddCommand(configCmd)
+
 	cobra.OnInitialize(initConfig)
 }