Add support for nix flakes (#1614)

* Add support for nix flakes * Added debug build type for flake.nix; Got rid of redundant version check in nix/default.nix * Added dev shell with compile_commands.json into flake.nix * Fixed issue with generated compile_commands.json while creating c3c derivation with nix. Deduced devShells in flake.nix to nix/shell.nix
2026-02-27 12:01:16 +00:00 · 2024-11-12 13:33:39 +02:00
parent a228eb020d
commit e6b6edefaf
5 changed files with 204 additions and 0 deletions
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -0,0 +1,85 @@
+{
+  lib,
+  llvmPackages,
+  cmake,
+  python3,
+  curl,
+  libxml2,
+  libffi,
+  xar,
+  debug ? false,
+  checks ? true,
+}: let 
+  inherit (builtins) baseNameOf toString readFile elemAt;
+  inherit (lib.sources) cleanSourceWith cleanSource; 
+  inherit (lib.lists) findFirst;
+  inherit (lib.asserts) assertMsg;
+  inherit (lib.strings) hasInfix hasSuffix splitString removeSuffix removePrefix optionalString;
+in 
+llvmPackages.stdenv.mkDerivation (finalAttrs: {
+  pname = "c3c${optionalString debug "-debug"}";
+  version = let
+    findLine = findFirst (x: hasInfix "COMPILER_VERSION" x) "none";
+    foundLine = findLine ( splitString "\n" ( readFile ../src/version.h ) );
+    version = removeSuffix "\"" ( removePrefix "\"" ( elemAt ( splitString " " foundLine ) 2 ) );
+  in 
+    assert assertMsg (foundLine != "none") "No COMPILER_VERSION substring was found in version.h";
+    version;
+
+  src = cleanSourceWith {
+    filter = _path: _type: !(hasSuffix ".nix" (baseNameOf(toString _path)));
+    src = cleanSource ../.;
+  };
+
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace-fail "\''${LLVM_LIBRARY_DIRS}" "${llvmPackages.lld.lib}/lib ${llvmPackages.llvm.lib}/lib"
+  '';
+
+  cmakeBuildType = if debug then "Debug" else "Release";
+
+  cmakeFlags = [
+    "-DC3_ENABLE_CLANGD_LSP=${if debug then "ON" else "OFF"}"
+  ];
+
+  nativeBuildInputs = [ cmake ];
+
+  postBuild = optionalString debug ''
+    mkdir $out
+    substituteInPlace compile_commands.json \
+      --replace "/build/source/" "$src/"
+    cp compile_commands.json $out/compile_commands.json
+  '';
+
+  buildInputs = [
+    llvmPackages.llvm
+    llvmPackages.lld
+    curl
+    libxml2
+    libffi
+  ] ++ lib.optionals llvmPackages.stdenv.hostPlatform.isDarwin [ xar ];
+
+  nativeCheckInputs = [ python3 ];
+
+  doCheck = llvmPackages.stdenv.system == "x86_64-linux" && checks;
+
+  checkPhase = ''
+    runHook preCheck
+    ( cd ../resources/testproject; ../../build/c3c build )
+    ( cd ../test; python src/tester.py ../build/c3c test_suite )
+    runHook postCheck
+  '';
+
+  meta = with lib; {
+    description = "Compiler for the C3 language";
+    homepage = "https://github.com/c3lang/c3c";
+    license = licenses.lgpl3Only;
+    maintainers = with maintainers; [
+      luc65r
+      anas
+    ];
+    platforms = platforms.all;
+    mainProgram = "c3c";
+  };
+})
+