Import nhlomann/json

It is the single_include/json.hpp file from https://github.com/nlohmann/json/releases/tag/v3.10.2

CMakeLists.txt

@@ -43,7 +43,6 @@ include(EthCcache)
 # Let's find our dependencies
 include(EthDependencies)
 include(fmtlib)
-include(nlohmann-json)
 include(range-v3)
 
 find_package(Threads)

cmake/nlohmann-json.cmake

@@ -1,13 +0,0 @@
-include(FetchContent)
-
-FetchContent_Declare(
-    fmtlib
-    PREFIX "${CMAKE_BINARY_DIR}/deps"
-    DOWNLOAD_DIR "${CMAKE_SOURCE_DIR}/deps/nlohmann/json"
-    DOWNLOAD_NAME json.hpp
-    DOWNLOAD_NO_EXTRACT 1
-    URL https://github.com/nlohmann/json/releases/download/v3.10.2/json.hpp
-    URL_HASH SHA256=059743e48b37e41579ee3a92e82e984bfa0d2a9a2b20b175d04db8089f46f047
-)
-
-include_directories(SYSTEM ${CMAKE_SOURCE_DIR}/deps/nlohmann)

libsolutil/CMakeLists.txt

@@ -23,6 +23,7 @@ set(sources
 	Keccak256.h
 	LazyInit.h
 	LEB128.h
+	nlohmannjson.hpp
 	Numeric.cpp
 	Numeric.h
 	picosha2.h

libsolutil/JSON.h

@@ -23,7 +23,7 @@
 
 #pragma once
 
-#include <json/json.hpp>
+#include <libsolutil/nlohmannjson.hpp>
 
 #include <string>
 

scripts/check_style.sh

@@ -6,6 +6,7 @@ ERROR_LOG="$(mktemp -t check_style_XXXXXX.log)"
 
 EXCLUDE_FILES=(
     "libsolutil/picosha2.h"
+    "libsolutil/nlohmannjson.hpp"
     "test/cmdlineTests/strict_asm_only_cr/input.yul"
     "test/cmdlineTests/strict_asm_only_cr/err"
     "test/libsolutil/UTF8.cpp"

scripts/release_ppa.sh

@@ -127,7 +127,6 @@ mv solidity solc
 mkdir -p ./solc/deps/downloads/ 2>/dev/null || true
 wget -O ./solc/deps/downloads/range-v3-0.12.0.tar.gz https://github.com/ericniebler/range-v3/archive/0.12.0.tar.gz
 wget -O ./solc/deps/downloads/fmt-8.0.1.tar.gz https://github.com/fmtlib/fmt/archive/8.0.1.tar.gz
-wget -O ./solc/deps/nlohmann/json/json.hpp https://github.com/nlohmann/json/releases/download/v3.10.2/json.hpp
 
 # Determine version
 cd solc