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Merge remote-tracking branch 'origin/master' into libgit2

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This commit is contained in:
Eelco Dolstra 2023-11-02 16:16:37 +01:00
commit 39ea46abb1
85 changed files with 971 additions and 576 deletions
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79
src/libfetchers/fetchers.cc
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@ -6,12 +6,31 @@
namespace nix::fetchers {
std::unique_ptr<std::vector<std::shared_ptr<InputScheme>>> inputSchemes = nullptr;
using InputSchemeMap = std::map<std::string_view, std::shared_ptr<InputScheme>>;
std::unique_ptr<InputSchemeMap> inputSchemes = nullptr;
void registerInputScheme(std::shared_ptr<InputScheme> && inputScheme)
{
if (!inputSchemes) inputSchemes = std::make_unique<std::vector<std::shared_ptr<InputScheme>>>();
inputSchemes->push_back(std::move(inputScheme));
if (!inputSchemes)
inputSchemes = std::make_unique<InputSchemeMap>();
auto schemeName = inputScheme->schemeName();
if (inputSchemes->count(schemeName) > 0)
throw Error("Input scheme with name %s already registered", schemeName);
inputSchemes->insert_or_assign(schemeName, std::move(inputScheme));
}
nlohmann::json dumpRegisterInputSchemeInfo() {
using nlohmann::json;
auto res = json::object();
for (auto & [name, scheme] : *inputSchemes) {
auto & r = res[name] = json::object();
r["allowedAttrs"] = scheme->allowedAttrs();
}
return res;
}
Input Input::fromURL(const std::string & url, bool requireTree)
@ -34,7 +53,7 @@ static void fixupInput(Input & input)
Input Input::fromURL(const ParsedURL & url, bool requireTree)
{
for (auto & inputScheme : *inputSchemes) {
for (auto & [_, inputScheme] : *inputSchemes) {
auto res = inputScheme->inputFromURL(url, requireTree);
if (res) {
experimentalFeatureSettings.require(inputScheme->experimentalFeature());
@ -49,20 +68,44 @@ Input Input::fromURL(const ParsedURL & url, bool requireTree)
Input Input::fromAttrs(Attrs && attrs)
{
for (auto & inputScheme : *inputSchemes) {
auto res = inputScheme->inputFromAttrs(attrs);
if (res) {
experimentalFeatureSettings.require(inputScheme->experimentalFeature());
res->scheme = inputScheme;
fixupInput(*res);
return std::move(*res);
}
}
auto schemeName = ({
auto schemeNameOpt = maybeGetStrAttr(attrs, "type");
if (!schemeNameOpt)
throw Error("'type' attribute to specify input scheme is required but not provided");
*std::move(schemeNameOpt);
});
Input input;
input.attrs = attrs;
fixupInput(input);
return input;
auto raw = [&]() {
// Return an input without a scheme; most operations will fail,
// but not all of them. Doing this is to support those other
// operations which are supposed to be robust on
// unknown/uninterpretable inputs.
Input input;
input.attrs = attrs;
fixupInput(input);
return input;
};
std::shared_ptr<InputScheme> inputScheme = ({
auto i = inputSchemes->find(schemeName);
i == inputSchemes->end() ? nullptr : i->second;
});
if (!inputScheme) return raw();
experimentalFeatureSettings.require(inputScheme->experimentalFeature());
auto allowedAttrs = inputScheme->allowedAttrs();
for (auto & [name, _] : attrs)
if (name != "type" && allowedAttrs.count(name) == 0)
throw Error("input attribute '%s' not supported by scheme '%s'", name, schemeName);
auto res = inputScheme->inputFromAttrs(attrs);
if (!res) return raw();
res->scheme = inputScheme;
fixupInput(*res);
return std::move(*res);
}
ParsedURL Input::toURL() const
@ -325,7 +368,7 @@ std::pair<ref<InputAccessor>, Input> InputScheme::getAccessor(ref<Store> store,
throw UnimplementedError("InputScheme must implement fetch() or getAccessor()");
}
std::optional<ExperimentalFeature> InputScheme::experimentalFeature()
std::optional<ExperimentalFeature> InputScheme::experimentalFeature() const
{
return {};
}