exerr [WIP]

(cherry picked from commit c0443af63b)

exerr/errinit.go

@@ -0,0 +1,50 @@
+package exerr
+
+type ErrorPackageConfig struct {
+	ZeroLogTraces   bool        // autom print zerolog logs on CreateError
+	RecursiveErrors bool        // errors contains their Origin-Error
+	Types           []ErrorType // all available error-types
+}
+
+type ErrorPackageConfigInit struct {
+	LogTraces       bool
+	RecursiveErrors bool
+	InitTypes       func(_ func(_ string) ErrorType)
+}
+
+var initialized = false
+
+var pkgconfig = ErrorPackageConfig{
+	ZeroLogTraces:   true,
+	RecursiveErrors: true,
+	Types:           []ErrorType{TypeInternal},
+}
+
+// Init initializes the exerr packages
+// Must be called at the program start, before (!) any errors
+// Is not thread-safe
+func Init(cfg ErrorPackageConfigInit) {
+	if initialized {
+		panic("Cannot re-init error package")
+	}
+
+	types := pkgconfig.Types
+
+	fnAddType := func(v string) ErrorType {
+		et := ErrorType{v}
+		types = append(types, et)
+		return et
+	}
+
+	if cfg.InitTypes != nil {
+		cfg.InitTypes(fnAddType)
+	}
+
+	pkgconfig = ErrorPackageConfig{
+		ZeroLogTraces:   cfg.LogTraces,
+		RecursiveErrors: cfg.RecursiveErrors,
+		Types:           types,
+	}
+
+	initialized = true
+}