wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-07-05 12:21:48 +02:00
Code Activity

Merge pull request #12292 from obsidiansystems/derivation-options

Browse source 
Introduce `DerivationOptions`
This commit is contained in:
John Ericson 2025-02-17 13:37:26 -05:00 • committed by GitHub
commit c003f3a4b4
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
14 changed files with 664 additions and 279 deletions
Download patch file Download diff file Expand all files Collapse all files

10
src/libutil/json-utils.cc
View file

@ -3,6 +3,7 @@
#include "types.hh"
#include <nlohmann/json_fwd.hpp>
#include <iostream>
#include <optional>
namespace nix {
@ -38,6 +39,15 @@ std::optional<nlohmann::json> optionalValueAt(const nlohmann::json::object_t & m
return std::optional { map.at(key) };
}
std::optional<nlohmann::json> nullableValueAt(const nlohmann::json::object_t & map, const std::string & key)
{
auto value = valueAt(map, key);
if (value.is_null())
return std::nullopt;
return std::optional { std::move(value) };
}
const nlohmann::json * getNullable(const nlohmann::json & value)
{

4
src/libutil/json-utils.hh
View file

@ -25,6 +25,7 @@ const nlohmann::json & valueAt(
const std::string & key);
std::optional<nlohmann::json> optionalValueAt(const nlohmann::json::object_t & value, const std::string & key);
std::optional<nlohmann::json> nullableValueAt(const nlohmann::json::object_t & value, const std::string & key);
/**
* Downcast the json object, failing with a nice error if the conversion fails.
@ -69,6 +70,9 @@ struct json_avoids_null<std::vector<T>> : std::true_type {};
template<typename T>
struct json_avoids_null<std::list<T>> : std::true_type {};
template<typename T>
struct json_avoids_null<std::set<T>> : std::true_type {};
template<typename K, typename V>
struct json_avoids_null<std::map<K, V>> : std::true_type {};