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#include "lockfile.hh"
#include "store-api.hh"
#include "fetchers/regex.hh"
#include <nlohmann/json.hpp>
namespace nix::flake {
LockedInput::LockedInput(const nlohmann::json & json)
: LockedInputs(json)
, ref(parseFlakeRef(json.value("url", json.value("uri", ""))))
, originalRef(parseFlakeRef(json.value("originalUrl", json.value("originalUri", ""))))
, narHash(Hash((std::string) json["narHash"]))
{
if (!ref.isImmutable())
throw Error("lockfile contains mutable flakeref '%s'", ref);
}
nlohmann::json LockedInput::toJson() const
{
auto json = LockedInputs::toJson();
json["url"] = ref.to_string();
json["originalUrl"] = originalRef.to_string();
json["narHash"] = narHash.to_string(SRI);
return json;
}
StorePath LockedInput::computeStorePath(Store & store) const
{
return store.makeFixedOutputPath(true, narHash, "source");
}
LockedInputs::LockedInputs(const nlohmann::json & json)
{
for (auto & i : json["inputs"].items())
inputs.insert_or_assign(i.key(), LockedInput(i.value()));
}
nlohmann::json LockedInputs::toJson() const
{
nlohmann::json json;
{
auto j = nlohmann::json::object();
for (auto & i : inputs)
j[i.first] = i.second.toJson();
json["inputs"] = std::move(j);
}
return json;
}
bool LockedInputs::isImmutable() const
{
for (auto & i : inputs)
if (!i.second.ref.isImmutable() || !i.second.isImmutable()) return false;
return true;
}
std::optional<LockedInput *> LockedInputs::findInput(const InputPath & path)
{
assert(!path.empty());
LockedInputs * pos = this;
for (auto & elem : path) {
auto i = pos->inputs.find(elem);
if (i == pos->inputs.end())
return {};
pos = &i->second;
}
return (LockedInput *) pos;
}
void LockedInputs::removeInput(const InputPath & path)
{
assert(!path.empty());
LockedInputs * pos = this;
for (size_t n = 0; n < path.size(); n++) {
auto i = pos->inputs.find(path[n]);
if (i == pos->inputs.end()) return;
if (n + 1 == path.size())
pos->inputs.erase(i);
else
pos = &i->second;
}
}
nlohmann::json LockFile::toJson() const
{
auto json = LockedInputs::toJson();
json["version"] = 3;
return json;
}
LockFile LockFile::read(const Path & path)
{
if (pathExists(path)) {
auto json = nlohmann::json::parse(readFile(path));
auto version = json.value("version", 0);
if (version != 3)
throw Error("lock file '%s' has unsupported version %d", path, version);
return LockFile(json);
} else
return LockFile();
}
std::ostream & operator <<(std::ostream & stream, const LockFile & lockFile)
{
stream << lockFile.toJson().dump(4); // '4' = indentation in json file
return stream;
}
void LockFile::write(const Path & path) const
{
createDirs(dirOf(path));
writeFile(path, fmt("%s\n", *this));
}
InputPath parseInputPath(std::string_view s)
{
InputPath path;
for (auto & elem : tokenizeString<std::vector<std::string>>(s, "/")) {
if (!std::regex_match(elem, fetchers::flakeIdRegex))
throw Error("invalid flake input path element '%s'", elem);
path.push_back(elem);
}
if (path.empty())
throw Error("flake input path is empty");
return path;
}
}
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