Extern handles for embedded runtime

1 files changed, 190 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..2850520
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,190 @@
+{
+  description = "RelationalNT CMake build";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    picosha2 = {
+      url = "github:okdshin/PicoSHA2";
+      flake = false;
+    };
+  };
+
+  outputs = { self, nixpkgs, picosha2 }:
+    let
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+
+      forAllSystems = nixpkgs.lib.genAttrs systems;
+
+      # Shared per-system derivations used by both the package and the dev shell.
+      mkDeps = system:
+        let
+          pkgs = import nixpkgs { inherit system; };
+
+          # Maps the vcpkg-style unofficial::sqlite3::sqlite3 CMake
+          # target to the system SQLite3 package. Required because CMakeLists.txt
+          # calls target_link_libraries(... unofficial::sqlite3::sqlite3).
+          unofficialSqlite3Config = pkgs.writeTextDir
+            "share/unofficial-sqlite3/unofficial-sqlite3-config.cmake"
+            ''
+              include(CMakeFindDependencyMacro)
+              find_dependency(SQLite3 REQUIRED)
+
+              if(NOT TARGET unofficial::sqlite3::sqlite3)
+                add_library(unofficial::sqlite3::sqlite3 INTERFACE IMPORTED)
+                target_link_libraries(unofficial::sqlite3::sqlite3 INTERFACE SQLite::SQLite3)
+              endif()
+            '';
+
+          # PicoSHA2 is a single-header library; extract just the header.
+          picosha2Headers = pkgs.runCommand "picosha2-headers" { } ''
+            install -Dm644 ${picosha2}/picosha2.h $out/include/picosha2.h
+          '';
+
+        in { inherit pkgs unofficialSqlite3Config picosha2Headers; };
+
+    in
+    {
+      packages = forAllSystems (system:
+        let
+          inherit (mkDeps system) pkgs unofficialSqlite3Config picosha2Headers;
+        in
+        {
+          default = pkgs.stdenv.mkDerivation {
+            pname = "relationalnt";
+            version = "0.1.0";
+
+            src = self;
+
+            nativeBuildInputs = [
+              pkgs.cmake
+              pkgs.ninja
+            ];
+
+            buildInputs = [
+              pkgs.catch2_3
+              picosha2Headers
+              pkgs.sqlite
+              unofficialSqlite3Config
+            ];
+
+            cmakeFlags = [
+              "-DCMAKE_BUILD_TYPE=Release"
+            ];
+
+            doCheck = true;
+            checkPhase = ''
+              runHook preCheck
+              ctest --output-on-failure
+              runHook postCheck
+            '';
+
+            installPhase = ''
+              runHook preInstall
+              install -Dm755 RelationalNT "$out/bin/RelationalNT"
+              install -Dm755 RNT_tests "$out/bin/RNT_tests"
+              for lib in libRNT.so libRNT.dylib; do
+                if [ -f "$lib" ]; then
+                  install -Dm755 "$lib" "$out/lib/$lib"
+                fi
+              done
+              install -Dm644 ../include/RNT_C_API.h "$out/include/RNT_C_API.h"
+              runHook postInstall
+            '';
+
+            meta = {
+              description = "Experimental database kernel inspired by the Windows NT object manager";
+              mainProgram = "RelationalNT";
+            };
+          };
+        });
+
+      devShells = forAllSystems (system:
+        let
+          inherit (mkDeps system) pkgs unofficialSqlite3Config picosha2Headers;
+
+          # Wrapper that invokes clangd with the Nix toolchain's compiler paths,
+          # enabling accurate diagnostics in editors that use compile_commands.json.
+          clangdRnt = pkgs.writeShellScriptBin "clangd-rnt" ''
+            exec ${pkgs.clang-tools}/bin/clangd \
+              --query-driver='${pkgs.stdenv.cc}/bin/*,/usr/bin/clang,/usr/bin/clang++' \
+              "$@"
+          '';
+        in
+        {
+          default = pkgs.mkShell {
+            packages = [
+              pkgs.catch2_3
+              pkgs.clang-tools
+              pkgs.cmake
+              pkgs.lldb
+              pkgs.ninja
+              clangdRnt
+              picosha2Headers
+              pkgs.sqlite
+              unofficialSqlite3Config
+            ];
+
+            CC = "${pkgs.stdenv.cc}/bin/cc";
+            CXX = "${pkgs.stdenv.cc}/bin/c++";
+
+            CMAKE_PREFIX_PATH = pkgs.lib.makeSearchPathOutput "dev" "" [
+              picosha2Headers
+              pkgs.sqlite
+              unofficialSqlite3Config
+            ];
+
+            CMAKE_INCLUDE_PATH = pkgs.lib.makeSearchPathOutput "dev" "include" [
+              picosha2Headers
+              pkgs.sqlite
+            ];
+
+            CMAKE_LIBRARY_PATH = pkgs.lib.makeLibraryPath [
+              pkgs.sqlite
+            ];
+
+            CPATH = pkgs.lib.makeSearchPathOutput "dev" "include" [
+              picosha2Headers
+              pkgs.sqlite
+            ];
+
+            C_INCLUDE_PATH = pkgs.lib.makeSearchPathOutput "dev" "include" [
+              pkgs.sqlite
+            ];
+
+            CPLUS_INCLUDE_PATH = pkgs.lib.makeSearchPathOutput "dev" "include" [
+              picosha2Headers
+              pkgs.sqlite
+            ];
+
+            LIBRARY_PATH = pkgs.lib.makeLibraryPath [
+              pkgs.sqlite
+            ];
+
+            DYLD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [
+              pkgs.sqlite
+            ];
+
+            PKG_CONFIG_PATH = pkgs.lib.makeSearchPathOutput "dev" "lib/pkgconfig" [
+              pkgs.sqlite
+            ];
+
+            shellHook = ''
+              export NIX_CFLAGS_COMPILE="-I${picosha2Headers}/include -I${pkgs.sqlite.dev}/include $NIX_CFLAGS_COMPILE"
+              export NIX_LDFLAGS="-L${pkgs.sqlite.out}/lib $NIX_LDFLAGS"
+            '';
+          };
+        });
+
+      apps = forAllSystems (system: {
+        default = {
+          type = "app";
+          program = "${self.packages.${system}.default}/bin/RelationalNT";
+        };
+      });
+    };
+}