NixOS-trying-pdfium-build2

with import <nixpkgs> {};

with stdenv.lib;

let
  mkGnFlags =
    let
      # Serialize Nix types into GN types according to this document:
      # https://chromium.googlesource.com/chromium/src/+/master/tools/gn/docs/language.md
      mkGnString = value: "\"${escape ["\"" "$" "\\"] value}\"";
      sanitize = value:
        if value == true then "true"
        else if value == false then "false"
        else if isList value then "[${concatMapStringsSep ", " sanitize value}]"
        else if isInt value then toString value
        else if isString value then mkGnString value
        else throw "Unsupported type for GN value `${value}'.";
      toFlag = key: value: "${key}=${sanitize value}";
    in attrs: concatStringsSep " " (attrValues (mapAttrs toFlag attrs));

  gnFlags = mkGnFlags ({
      linux_use_bundled_binutils = false;
      use_gold = true;
      gold_path = "${stdenv.cc}/bin";
      is_debug = false;

      use_sysroot = false;

      treat_warnings_as_errors = false;
      is_clang = false;
      clang_use_chrome_plugins = false;
      remove_webcore_debug_symbols = true;
      use_gtk3 = true;
      enable_swiftshader = false;
      fieldtrial_testing_like_official_build = true;

      # Google API keys, see:
      #   http://www.chromium.org/developers/how-tos/api-keys
      # Note: These are for NixOS/nixpkgs use ONLY. For your own distribution,
      # please get your own set of keys.
      google_api_key = "AIzaSyDGi15Zwl11UNe6Y-5XW_upsfyw31qwZPI";
      google_default_client_id = "404761575300.apps.googleusercontent.com";
      google_default_client_secret = "9rIFQjfnkykEmqb6FfjJQD1D";
    });

  gnSystemLibraries = [
    "flac" "libwebp" "libxslt" "yasm" "opus" "snappy" "libpng" "zlib"
  ];

  # build paths and release info
  packageName = "pdfium"; # extraAttrs.packageName or extraAttrs.name;
  buildType = "Release";
  buildPath = "out/${buildType}";
  libExecPath = "$out/libexec/${packageName}";


base = rec {
  name = "pdfium.99.9";
  
configurePhase = ''
      runHook preConfigure
      # Build gn
      #python tools/gn/bootstrap/bootstrap.py -v -s --no-clean
      #PATH="$PWD/out/Release:$PATH"
      # This is to ensure expansion of $out.
      libExecPath="${libExecPath}"
      python build/linux/unbundle/replace_gn_files.py \
        --system-libraries ${toString gnSystemLibraries}
      gn gen --args=${gnFlags} out/Release
      runHook postConfigure
    '';


  buildInputs = [
stdenv
ninja
which
nodejs
#fetchurl
gnutar

# default dependencies
 bzip2 flac speex libopus
 libevent expat libjpeg snappy
 libpng libcap
 xdg_utils yasm minizip libwebp
 libusb1 pciutils nss re2 zlib libvpx

# python2Packages
perl
pkgconfig
bison
gperf
 glib gtk2 gtk3 dbus_glib
 protobuf speechd cups
 ffmpeg harfbuzz harfbuzz-icu libxslt libxml2

  ];


  src = pkgs.fetchgit {
        "url" = "https://pdfium.googlesource.com/pdfium";
        "rev" = "effa1b15ae2ab34ae15892787d5c1caa015bd2d4";
        "sha256" = "1w667clbn2akvwrjx965jm1qw3ffhinmlkk22mp21drjssqbm8aa";
        "fetchSubmodules" = true;
        leaveDotGit = true; 
        };
        
        
  buildCommand = ''
    cd ~/Repos/pdfium/build/pdfium*
    echo BEGINNING BUILD
    
    
    '';
    
#  outputs = ["out" ];
#  
}; 

in stdenv.mkDerivation (base)
                                 

Half way through trying to build pdfium under NixOS.