Add the initial rough skeleton for a config tool.

internal/configparser/configparser.go

@@ -50,7 +50,7 @@ func getConfigFilePaths(directory string) ([]string, error) {
 		if err != nil {
 			return nil, errors.New("failed to create config directory at " + directory)
 		} else {
-			return nil, errors.New("no config files found at " + directory)
+			return nil, &EmptyConfigError{directory}
 		}
 	}
 
@@ -63,5 +63,9 @@ func getConfigFilePaths(directory string) ([]string, error) {
 		paths = append(paths, filepath.Join(directory, file.Name()))
 	}
 
+	if len(paths) == 0 {
+		return nil, &EmptyConfigError{directory}
+	}
+
 	return paths, nil
 }

internal/configparser/errors.go

@@ -0,0 +1,11 @@
+package configparser
+
+import "fmt"
+
+type EmptyConfigError struct {
+	directory string
+}
+
+func (e *EmptyConfigError) Error() string {
+	return fmt.Sprintf("no config files found at %s", e.directory)
+}