famistudio: .NET 7 -> 8 (NixOS#361867)

pkgs/by-name/fa/famistudio/build-native-wrapper.nix

@@ -0,0 +1,84 @@
+{
+  depname,
+  version,
+  src,
+  sourceRoot,
+  stdenv,
+  lib,
+  patches ? [ ],
+  extraPostPatch ? "",
+  buildInputs ? [ ],
+}:
+
+let
+  rebuildscriptName =
+    if stdenv.hostPlatform.isLinux then
+      "build_linux"
+    else if stdenv.hostPlatform.isDarwin then
+      "build_macos"
+    else
+      throw "Don't know how to rebuild FamiStudio's vendored ${depname} for ${stdenv.hostPlatform.system}";
+in
+stdenv.mkDerivation {
+  pname = "famistudio-nativedep-${depname}";
+  inherit
+    version
+    src
+    sourceRoot
+    patches
+    buildInputs
+    ;
+
+  postPatch =
+    let
+      libnameBase = lib.optionalString stdenv.hostPlatform.isLinux "lib" + depname;
+    in
+    ''
+      # Use one name for build script, eases with patching
+      mv ${rebuildscriptName}.sh build.sh
+
+      # Scripts use hardcoded compilers and try to copy built libraries into FamiStudio's build tree
+      # Not all scripts use the same compiler, so don't fail on replacing that
+      substituteInPlace build.sh \
+        --replace-fail '../../FamiStudio/' "$out/lib/" \
+        --replace-quiet 'g++' "$CXX"
+
+      # Replacing gcc via sed, would break -static-libgcc otherwise
+      sed -i -e "s/^gcc/$CC/g" build.sh
+    ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
+      # Darwin rebuild scripts try to make a universal2 dylib
+      # - build dylib for non-hostPlatform
+      # - copy built library into special directory for later packaging script
+      # - join two dylibs together into a universal2 dylib
+      # Remove everything we don't need
+      sed -ri \
+        -e '/-target ${if stdenv.hostPlatform.isx86_64 then "arm64" else "x86_64"}/d' \
+        -e '/..\/..\/Setup/d' \
+        build.sh
+
+      # Replace joining multi-arch dylibs with copying dylib for target arch
+      substituteInPlace build.sh \
+        --replace-fail 'lipo -create -output ${libnameBase}.dylib' 'cp ${libnameBase}_${
+          if stdenv.hostPlatform.isx86_64 then "x86_64" else "arm64"
+        }.dylib ${libnameBase}.dylib #'
+    ''
+    + extraPostPatch;
+
+  dontConfigure = true;
+  dontInstall = true; # rebuild script automatically installs
+
+  buildPhase = ''
+    runHook preBuild
+
+    mkdir -p $out/lib
+
+    # Delete all prebuilt libraries, make sure everything is rebuilt
+    find . -name '*.so' -or -name '*.dylib' -or -name '*.a' -delete
+
+    # When calling normally, an error won't cause derivation to fail
+    source ./build.sh
+
+    runHook postBuild
+  '';
+}