nixpkgs/pkgs/test/buildFHSEnv/default.nix

{ lib
, buildFHSEnv
, runCommand
, stdenv
, fetchurl
, dpkg
, glibc
, callPackage
}:

let
  getSharedObjectFromDebian = sharedObjectName: src: stdenv.mkDerivation  {
    name = "${sharedObjectName}-fetcher";
    inherit src;
    nativeBuildInputs = [
      dpkg
    ];
    dontBuild = true;
    dontConfigure = true;
    dontFixup = true;
    installPhase = ''
      echo shared objects found are:
      ls -l usr/lib/*/
      cp usr/lib/*/${sharedObjectName} $out
    '';
  };

  makeSharedObjectTest = sharedObject: targetPkgs: let
    lddFHSEnv = buildFHSEnv {
      name = "ldd-with-ncurses-FHS-env";
      inherit targetPkgs;
      runScript = "ldd";
    };
    ldd-in-FHS = "${lddFHSEnv}/bin/${lddFHSEnv.name}";
    ldd = "${lib.getBin glibc}/bin/ldd";
    find_libFHSEnv = buildFHSEnv {
      name = "ls-with-ncurses-FHS-env";
      targetPkgs = p: [
        p.ncurses5
      ];
      runScript = "find /lib/ -executable";
    };
    find_lib-in-FHS = "${find_libFHSEnv}/bin/${find_libFHSEnv.name}";
  in runCommand "FHS-lib-test" {} ''
    echo original ldd output is:
    ${ldd} ${sharedObject}
    lddOutput="$(${ldd-in-FHS} ${sharedObject})"
    echo ldd output inside FHS is:
    echo "$lddOutput"
    if echo $lddOutput | grep -q "not found"; then
      echo "shared object could not find all dependencies in the FHS!"
      echo The libraries below where found in the FHS:
      ${find_lib-in-FHS}
      exit 1
    else
      echo $lddOutput > $out
    fi
  '';

in {
  # This test proves an issue with buildFHSEnv - don't expect it to succeed,
  # this is discussed in https://github.com/NixOS/nixpkgs/pull/279844 .
  libtinfo = makeSharedObjectTest (getSharedObjectFromDebian "libedit.so.2.0.70" (fetchurl {
    url = "mirror://debian/pool/main/libe/libedit/libedit2_3.1-20221030-2_amd64.deb";
    hash = "sha256-HPFKvycW0yedsS0GV6VzfPcAdKHnHTvfcyBmJePInOY=";
  })) (p: let
    ncurses' = p.ncurses.overrideAttrs (old: {
      configureFlags = old.configureFlags ++ [ "--with-termlib" ];
      postFixup = "";
    });
  in [
    (ncurses'.override { unicodeSupport = false; })
    p.libbsd
  ]);

  liblzma = makeSharedObjectTest (getSharedObjectFromDebian "libxml2.so.2.9.14" (fetchurl {
    url = "mirror://debian/pool/main/libx/libxml2/libxml2_2.9.14+dfsg-1.3~deb12u1_amd64.deb";
    hash = "sha256-NbdstwOPwclAIEpPBfM/+3nQJzU85Gk5fZrc+Pmz4ac=";
  })) (p: [
    p.xz
    p.zlib
    p.icu72
  ]);
}