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nlohmann::json instance and JSON Schema for MemorySourceAccessor

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Also do a better JSON and testing for deep and shallow NAR listings.

As documented, this for file system objects themselves, since
`MemorySourceAccessor` is an implementation detail.
This commit is contained in:
John Ericson 2025-09-28 00:29:21 -04:00
parent c4906741a1
commit 7357a654de
26 changed files with 605 additions and 101 deletions
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48
src/libutil/nar-accessor.cc
View file

@ -324,52 +324,4 @@ ShallowNarListing listNarShallow(SourceAccessor & accessor, const CanonPath & pa
return listNarImpl<false>(accessor, path);
}
template<typename Listing>
static void to_json_impl(nlohmann::json & j, const Listing & listing)
{
std::visit(
overloaded{
[&](const typename Listing::Regular & r) {
j = nlohmann::json::object();
j["type"] = "regular";
if (r.contents.fileSize)
j["size"] = *r.contents.fileSize;
if (r.executable)
j["executable"] = true;
if (r.contents.narOffset)
j["narOffset"] = *r.contents.narOffset;
},
[&](const typename Listing::Directory & d) {
j = nlohmann::json::object();
j["type"] = "directory";
j["entries"] = nlohmann::json::object();
for (const auto & [name, child] : d.entries) {
if constexpr (std::is_same_v<Listing, NarListing>) {
to_json(j["entries"][name], child);
} else if constexpr (std::is_same_v<Listing, ShallowNarListing>) {
j["entries"][name] = nlohmann::json::object();
} else {
static_assert(false);
}
}
},
[&](const typename Listing::Symlink & s) {
j = nlohmann::json::object();
j["type"] = "symlink";
j["target"] = s.target;
},
},
listing.raw);
}
void to_json(nlohmann::json & j, const NarListing & listing)
{
to_json_impl(j, listing);
}
void to_json(nlohmann::json & j, const ShallowNarListing & listing)
{
to_json_impl(j, listing);
}
} // namespace nix