zconfig | based configuration and dependency injection tool | Dependency Injection library

Remove them from the providers of your repository. For the classic processor, you want to do this:. First obvious way would be to use custom types implementing the encoding.TextUnmarshaller interface and do the check here. That would add being explicit in the configuration by having the advantage of not allowing inconsistent state. In the same web-form validation style, you could add additional validation tags to your struct and create a hook to check that the value matches the rules. Another way would be to do it in the Init() method of your field, so the initialization hook will handle the check. This has the advantage of not forcing custom types for the runtime types, and having the ability to cross-check multiple fields by using the parent's struct method. Of course. The Processor.Process() method is completely self-contained, and doesn't use any state from the Processor except the list of hooks to apply. Same thing goes for the Repository and the basic Provider of zconfig. What you want is a custom provider. If the set provided by zconfig itself doesn't cover your way of defining configuration, you can always add one to the default repository (or define your own). Here is a quick-and-dirty example you can use as basis for a provider getting its values from an arbitrary JSON file. The library tidwall/gjson is an alternative library for manipulating JSON that fits this use case particularly well: it doesn't parse the whole string, and only look for the field identified by the given key (whose format match the zconfig one.). Amongst the improvements possible, this provider could be constructed using a value retrieved from zconfig.Args or zconfig.Env so the path can be given on the command-line of your program.