A .env file in the working directory is now optional

internal/cli/flags_test.go

@@ -73,11 +73,17 @@ func TestConfigFlag(t *testing.T) {
 	}
 }
 
-func TestMissingEnvFile(t *testing.T) {
+// A .env file is optional, but one that can't be parsed is an error.
+func TestEnvFile(t *testing.T) {
 	cmdtest.Setup(t, appConfig)
 	if err := os.Remove(".env"); err != nil {
 		t.Fatal(err)
 	}
+	if _, err := cmdtest.Run(t, newRoot, "", "level"); err != nil {
+		t.Errorf("without a .env file: %v; want no error", err)
+	}
+
+	cmdtest.WriteFile(t, ".env", "NOT VALID\n")
 	_, err := cmdtest.Run(t, newRoot, "", "level")
 	cmdtest.ErrContains(t, err, ".env")
 }