# FHS build environment for the LineageOS 14.1 (rubenslte) build.
# Same package set as shell.nix (TWRP env) plus a host gcc: the kernel kconfig
# host tools (`conf`) and kernel/scripts are compiled with the host compiler
# during the LOS build, while the omni 5.1 TWRP build only needs them from the
# device's arm-eabi toolchain.
#
# Intentionally kept as a separate file: the TWRP build is device-tested, so
# shell.nix is not touched. Keep the two packages sets in sync where possible.
let
  pkgs = import (fetchTarball {
    url = "https://github.com/NixOS/nixpkgs/archive/nixos-22.11.tar.gz";
  }) {};

  fhs = pkgs.buildFHSUserEnv {
    name = "android-env";

    targetPkgs = pkgs: with pkgs; [
      git         # the device/kernel clones (and `repo` plumbing)
      gitRepo     # AOSP `repo` multi-repo tool
      gnumake     # `mka` -> make for the bacon build
      gcc         # host C compiler for kernel kconfig host tools
      python2     # cm-14.1 era build scripts expect python2
      python3     # modern `repo` runs under python3
      curl        # tarball downloads
      openssl     # used by a few AOSP host tools
      procps      # `ps`/`pidof` referenced by build scripts
      util-linux  # uuidgen and friends used during image building
      android-tools # adb / fastboot for flashing and testing
      jdk8        # 14.1 needs java <=8 (signapk, dx, jack)
      schedtool   # legacy tool invoked by some build scripts
      m4 gperf bison flex   # classic AOSP host toolchain
      which       # jack-admin / diagnose helpers probe PATH
      perl        # kernel/scripting helper (timeconst.pl, etc.)
      libxml2     # xml libs used by host tools
      zip unzip   # packaging
      lzop        # legacy lzo support
      xz          # LZMA ramdisk compression
      gnupg       # gpg for repo manifest verification (optional)
      nettools    # minor networking helpers used by host scripts
    ];

    multiPkgs = pkgs: with pkgs; [
      zlib
      ncurses5
      pkgsi686Linux.gcc9
      pkgsi686Linux.libstdcxx5
    ];

    runScript = "bash";
    profile = "export ANDROID_JAVA_HOME=${pkgs.jdk8.home}";
  };
in pkgs.stdenv.mkDerivation {
  name = "android-env-shell";
  nativeBuildInputs = [ fhs ];
  shellHook = ''
    if [ -n "$BASH_EXECUTION_STRING" ]; then
      exec android-env -c "$BASH_EXECUTION_STRING"
    fi
    exec android-env
  '';
}