{ stdenv
, fetchFromGitHub
, which
, cmake
, clang_35
, llvmPackages_36
, libunwind
, gettext
, openssl
, python2
, icu
, lttng-ust
, liburcu
, libuuid
, ed
, debug ? false
}:

stdenv.mkDerivation rec {
  name = "coreclr-${version}";
  version = "1.0.4";

  src = fetchFromGitHub {
    owner  = "dotnet";
    repo   = "coreclr";
    rev    = "v${version}";
    sha256 = "1wpig71q0kh2yrq162d32x00zlwrrs1wymkgijh49cqkn4cwkh91";
  };

  buildInputs = [
    which
    cmake
    clang_35
    llvmPackages_36.llvm
    llvmPackages_36.lldb
    libunwind
    gettext
    openssl
    python2
    icu
    lttng-ust
    liburcu
    libuuid
    ed
  ];

  configurePhase = ''
    # Prevent clang-3.5 (rather than just clang) from being selected as the compiler as that's
    # not wrapped
    substituteInPlace src/pal/tools/gen-buildsys-clang.sh --replace "which \"clang-\$" "which \"clang-DoNotFindThisOne\$"

    patchShebangs build.sh
    patchShebangs src/pal/tools/gen-buildsys-clang.sh

    # See https://github.com/dotnet/coreclr/issues/7573#issuecomment-253081323
    ed -v ./src/pal/src/include/pal/palinternal.h << EOF
    /^#undef memcpy
    -1
    d
    +1
    d
    w
    EOF
  '';

  BuildArch = if stdenv.is64bit then "x64" else "x86";
  BuildType = if debug then "Debug" else "Release";

  hardeningDisable = [ "strictoverflow" "format" ];
  NIX_CFLAGS_COMPILE = [ "-Wno-error=unused-result" ];

  buildPhase = ''
    ./build.sh $BuildArch $BuildType

    # Try to make some sensible hierarchy out of the output
    pushd bin/Product/Linux.$BuildArch.$BuildType
    mkdir lib2
    mv *.so *.so.dbg lib2
    mv bin lib3
    mkdir lib4
    mv Loader lib4
    mv inc include
    mv gcinfo include
    mkdir bin
    mkdir -p share/doc
    mv sosdocsunix.txt share/doc
    for f in * ; do test -f $f && mv -v $f bin; done
    popd
  '';

  installPhase = ''
    mkdir -p $out
    cp -rv bin/Product/Linux.$BuildArch.$BuildType/* $out
  '';

  meta = {
    homepage = http://dotnet.github.io/core/;
    description = ".NET is a general purpose development platform";
    platforms = [ "x86_64-linux" ];
    maintainers = with stdenv.lib.maintainers; [ obadz ];
    license = stdenv.lib.licenses.mit;
  };
}