feat: error on non-matching configuration entries

1 files changed, 5 insertions, 0 deletions

diff --git a/internal/config/config.go b/internal/config/config.go
index 88bc006..6837ea7 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -191,12 +191,17 @@ func GetConfig(filename string) (*Config, error) {
 		defer f.Close()
 
 		dec := toml.NewDecoder(f)
+		dec.DisallowUnknownFields()
 		err = dec.Decode(&config)
 		if err != nil {
 			var tomlError *toml.DecodeError
 			if errors.As(err, &tomlError) {
 				return nil, errors.WithMessage(err, tomlError.Error())
 			}
+			var missingConfigError *toml.StrictMissingError
+			if errors.As(err, &missingConfigError) {
+				return nil, errors.Errorf("unexpected config: %s", missingConfigError.String())
+			}
 
 			return nil, errors.Wrap(err, "config error")
 		}