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Separate store configs from the implems

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Rework the `Store` hierarchy so that there's now one hierarchy for the
store configs and one for the implementations (where each implementation
extends the corresponding config). So a class hierarchy like

```
StoreConfig-------->Store
    |                 |
    v                 v
SubStoreConfig----->SubStore
    |                 |
    v                 v
SubSubStoreConfig-->SubSubStore
```

(with virtual inheritance to prevent DDD).

The advantage of this architecture is that we can now introspect the configuration of a store without having to instantiate the store itself
This commit is contained in:
regnat 2020-09-10 10:55:51 +02:00
parent aa4eac3788
commit 22afa8fb4d
13 changed files with 120 additions and 83 deletions
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4
src/libstore/dummy-store.cc
View file

@ -2,6 +2,8 @@
namespace nix {
struct DummyStoreConfig : StoreConfig {};
struct DummyStore : public Store
{
DummyStore(const std::string uri, const Params & params)
@ -54,6 +56,6 @@ struct DummyStore : public Store
{ unsupported("buildDerivation"); }
};
static RegisterStoreImplementation<DummyStore> regStore;
static RegisterStoreImplementation<DummyStore, DummyStoreConfig> regStore;
}