[Issue-447] Prevent project name from starting with a number (#472)

Author: theterminalguy

internal/init/prompts.go

@@ -94,13 +94,13 @@ func ValidateSAK(input string) error {
 // ValidateProjectName validates Project Name field user input.
 func ValidateProjectName(input string) error {
 	// the first 62 char out of base64 and -
-	var pName = regexp.MustCompile(`^[A-Za-z0-9-]{1,16}$`)
+	var pName = regexp.MustCompile(`^[a-zA-Z][A-Za-z0-9-]{1,16}$`)
 	if !pName.MatchString(input) {
 		// error if char len is greater than 16
 		if len(input) > constants.MaxPnameLength {
 			return errors.New("Invalid, Project Name: (cannot exceed a max length of 16)")
 		}
-		return errors.New("Invalid, Project Name: (can only contain alphanumeric chars & '-')")
+		return errors.New("invalid, Project Name: (can only contain alphanumeric chars & '-') and must start with a letter")
 	}
 	return nil
 }

internal/init/prompts_test.go

@@ -194,3 +194,20 @@ func TestGetParam(t *testing.T) {
 		assert.Equal(t, "Unsupported custom prompt type random-type.", err.Error())
 	})
 }
+
+func TestValidateProjectNam(t *testing.T) {
+	t.Run("Should return error upon invalid project name", func(t *testing.T) {
+		err := initPrompts.ValidateProjectName("0invalid")
+		assert.Error(t, err, "Project name should not start with a number")
+	})
+
+	t.Run("Should return error upon invalid project name length", func(t *testing.T) {
+		err := initPrompts.ValidateProjectName("invalid name with more than 30 characters")
+		assert.Error(t, err, "Project name should not be longer than 30 characters")
+	})
+
+	t.Run("Should return nil upon valid project name", func(t *testing.T) {
+		err := initPrompts.ValidateProjectName("valid-name")
+		assert.Nil(t, err)
+	})
+}