Merge pull request #8774 from NixLayeredStore/experimental-stores

Add infra for experimental store implementations
This commit is contained in:
Théophane Hufschmitt 2023-08-03 17:44:10 +02:00 committed by GitHub
commit 635df5ee95
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4 changed files with 39 additions and 4 deletions

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@ -137,12 +137,29 @@ let
storeDocs = storeDocs =
let let
showStore = name: { settings, doc }: showStore = name: { settings, doc, experimentalFeature }:
'' let
experimentalFeatureNote = optionalString (experimentalFeature != null) ''
> **Warning**
> This store is part of an
> [experimental feature](@docroot@/contributing/experimental-features.md).
To use this store, you need to make sure the corresponding experimental feature,
[`${experimentalFeature}`](@docroot@/contributing/experimental-features.md#xp-feature-${experimentalFeature}),
is enabled.
For example, include the following in [`nix.conf`](#):
```
extra-experimental-features = ${experimentalFeature}
```
'';
in ''
## ${name} ## ${name}
${doc} ${doc}
${experimentalFeatureNote}
**Settings**: **Settings**:
${showSettings { useAnchors = false; } settings} ${showSettings { useAnchors = false; } settings}

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@ -1496,6 +1496,7 @@ ref<Store> openStore(const std::string & uri_,
if (implem.uriSchemes.count(parsedUri.scheme)) { if (implem.uriSchemes.count(parsedUri.scheme)) {
auto store = implem.create(parsedUri.scheme, baseURI, params); auto store = implem.create(parsedUri.scheme, baseURI, params);
if (store) { if (store) {
experimentalFeatureSettings.require(store->experimentalFeature());
store->init(); store->init();
store->warnUnknownSettings(); store->warnUnknownSettings();
return ref<Store>(store); return ref<Store>(store);

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@ -109,13 +109,28 @@ struct StoreConfig : public Config
virtual ~StoreConfig() { } virtual ~StoreConfig() { }
/**
* The name of this type of store.
*/
virtual const std::string name() = 0; virtual const std::string name() = 0;
/**
* Documentation for this type of store.
*/
virtual std::string doc() virtual std::string doc()
{ {
return ""; return "";
} }
/**
* An experimental feature this type store is gated, if it is to be
* experimental.
*/
virtual std::optional<ExperimentalFeature> experimentalFeature() const
{
return std::nullopt;
}
const PathSetting storeDir_{this, settings.nixStore, const PathSetting storeDir_{this, settings.nixStore,
"store", "store",
R"( R"(

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@ -180,8 +180,10 @@ struct NixArgs : virtual MultiCommand, virtual MixCommonArgs
for (auto & implem : *Implementations::registered) { for (auto & implem : *Implementations::registered) {
auto storeConfig = implem.getConfig(); auto storeConfig = implem.getConfig();
auto storeName = storeConfig->name(); auto storeName = storeConfig->name();
stores[storeName]["doc"] = storeConfig->doc(); auto & j = stores[storeName];
stores[storeName]["settings"] = storeConfig->toJSON(); j["doc"] = storeConfig->doc();
j["settings"] = storeConfig->toJSON();
j["experimentalFeature"] = storeConfig->experimentalFeature();
} }
res["stores"] = std::move(stores); res["stores"] = std::move(stores);