check git configuration before exec world create

cmd/world/root/create.go

@@ -2,10 +2,12 @@ package root
 
 import (
 	"io"
+	"os/exec"
 	"strings"
 
 	"github.com/charmbracelet/bubbles/textinput"
 	tea "github.com/charmbracelet/bubbletea"
+	"github.com/rotisserie/eris"
 	"github.com/spf13/cobra"
 
 	"pkg.world.dev/world-cli/common/teacmd"
@@ -204,6 +206,11 @@ Otherwise, it will prompt you to enter a directory name.`,
 		GroupID: "starter",
 		Args:    cobra.MaximumNArgs(1),
 		RunE: func(_ *cobra.Command, args []string) error {
+			err := checkGitConfig()
+			if err != nil {
+				return err
+			}
+
 			p := tea.NewProgram(NewWorldCreateModel(args), tea.WithOutput(writer))
 			if _, err := p.Run(); err != nil {
 				return err
@@ -214,3 +221,21 @@ Otherwise, it will prompt you to enter a directory name.`,
 
 	return createCmd
 }
+
+func checkGitConfig() error {
+	// Check Git user name
+	cmdUserName := exec.Command("git", "config", "--get", "user.name")
+	userName, err := cmdUserName.Output()
+	if err != nil || userName == nil {
+		return eris.New("retrieving Git user name, please set it using `git config --global user.name 'Your Name'`")
+	}
+
+	// Check Git user email
+	cmdUserEmail := exec.Command("git", "config", "--get", "user.email")
+	userEmail, err := cmdUserEmail.Output()
+	if err != nil || userEmail == nil {
+		return eris.New("retrieving Git user email, please set it using `git config --global user.email 'Your Email'`")
+	}
+
+	return nil
+}