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"
@@ -15,6 +17,9 @@ import (
 
 const TemplateGitURL = "https://github.com/Argus-Labs/starter-game-template.git"
 
+// execCommand is a variable to allow mocking exec.Command in tests
+var execCommand = exec.Command
+
 /////////////////////////
 // Bubble Tea Commands //
 /////////////////////////
@@ -204,6 +209,11 @@ 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 +224,21 @@ Otherwise, it will prompt you to enter a directory name.`,
 
 	return createCmd
 }
+
+func checkGitConfig() error {
+	// Check Git user name
+	cmdUserName := execCommand("git", "config", "--get", "user.name")
+	userName, err := cmdUserName.Output()
+	if err != nil || (userName != nil && strings.TrimSpace(string(userName)) == "") {
+		return eris.New("retrieving Git user name, please set it using `git config --global user.name 'Your Name'`")
+	}
+
+	// Check Git user email
+	cmdUserEmail := execCommand("git", "config", "--get", "user.email")
+	userEmail, err := cmdUserEmail.Output()
+	if err != nil || (userEmail != nil && strings.TrimSpace(string(userEmail)) == "") {
+		return eris.New("retrieving Git user email, please set it using `git config --global user.email 'Your Email'`")
+	}
+
+	return nil
+}

cmd/world/root/root_test.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net"
 	"os"
+	"os/exec"
 	"strings"
 	"testing"
 	"time"
@@ -303,3 +304,61 @@ func TestEVMStart(t *testing.T) {
 	// Check and wait until evm is down
 	assert.Assert(t, evmIsDown(t), "EVM is not successfully shutdown")
 }
+
+func TestCheckGitConfig(t *testing.T) {
+	t.Run("Real Scenario", func(t *testing.T) {
+		// Test when both user name and email with real values
+		err := checkGitConfig()
+		if err != nil {
+			t.Fatalf("Expected no error, got %v", err)
+		}
+	})
+
+	t.Run("Error Username", func(t *testing.T) {
+		// Test when user name is not set
+		execCommand = fakeExecCommandGetGitUsername
+		err := checkGitConfig()
+		assert.Error(t, err, "retrieving Git user name, please set it using `git config --global user.name 'Your Name'`")
+	})
+
+	t.Run("Error Email", func(t *testing.T) {
+		// Test when user name is not set
+		execCommand = fakeExecCommandGetGitEmail
+		err := checkGitConfig()
+		assert.Error(t, err, "retrieving Git user email, please set it using `git config --global user.email 'Your Email'`")
+	})
+}
+
+// fakeExecCommand is a fake version of exec.Command that simulates git config output
+func fakeExecCommandGetGitUsername(command string, args ...string) *exec.Cmd {
+	commandStr := fmt.Sprintf("%s %s", command, strings.Join(args, " "))
+
+	var cmd *exec.Cmd
+	switch commandStr {
+	case "git config --get user.name":
+		cmd = exec.Command("echo")
+	case "git config --get user.email":
+		cmd = exec.Command("echo", "[email protected]")
+	default:
+		cmd = exec.Command("echo")
+	}
+
+	return cmd
+}
+
+// fakeExecCommand is a fake version of exec.Command that simulates git config output
+func fakeExecCommandGetGitEmail(command string, args ...string) *exec.Cmd {
+	commandStr := fmt.Sprintf("%s %s", command, strings.Join(args, " "))
+
+	var cmd *exec.Cmd
+	switch commandStr {
+	case "git config --get user.name":
+		cmd = exec.Command("echo", "Test User")
+	case "git config --get user.email":
+		cmd = exec.Command("echo")
+	default:
+		cmd = exec.Command("echo")
+	}
+
+	return cmd
+}