# Make sure that the "with-gce" flag is set when building `google-cloud-sdk`
# for GCE hosts. This flag prevents "google-compute-engine" from being a
# default dependency which is undesirable because this package is
#
#   1) available only on GNU/Linux (requires `systemd` in particular)
#   2) intended only for GCE guests (and is useless elsewhere)
#   3) used by `google-cloud-sdk` only on GCE guests
#

{ stdenv, lib, fetchurl, makeWrapper, python, openssl, jq, callPackage, installShellFiles, with-gce ? false }:

let
  pythonEnv = python.withPackages (p: with p; [
    cffi
    cryptography
    pyopenssl
    crcmod
    numpy
  ] ++ lib.optional (with-gce) google-compute-engine);

  data = import ./data.nix { };
  sources = system:
    data.googleCloudSdkPkgs.${system} or (throw "Unsupported system: ${system}");

  components = callPackage ./components.nix {
    snapshotPath = ./components.json;
  };

  withExtraComponents = callPackage ./withExtraComponents.nix { inherit components; };

in stdenv.mkDerivation rec {
  pname = "google-cloud-sdk";
  inherit (data) version;

  src = fetchurl (sources stdenv.hostPlatform.system);

  buildInputs = [ python ];

  nativeBuildInputs = [ jq makeWrapper installShellFiles ];

  patches = [
    # For kubectl configs, don't store the absolute path of the `gcloud` binary as it can be garbage-collected
    ./gcloud-path.patch
    # Disable checking for updates for the package
    ./gsutil-disable-updates.patch
  ];

  installPhase = ''
    runHook preInstall

    mkdir -p $out/google-cloud-sdk
    if [ -d .install/platform/bundledpythonunix ]; then
      rm -r .install/platform/bundledpythonunix
    fi
    cp -R * .install $out/google-cloud-sdk/

    mkdir -p $out/google-cloud-sdk/lib/surface/{alpha,beta}
    cp ${./alpha__init__.py} $out/google-cloud-sdk/lib/surface/alpha/__init__.py
    cp ${./beta__init__.py} $out/google-cloud-sdk/lib/surface/beta/__init__.py

    # create wrappers with correct env
    for program in gcloud bq gsutil git-credential-gcloud.sh docker-credential-gcloud; do
        programPath="$out/google-cloud-sdk/bin/$program"
        binaryPath="$out/bin/$program"
        wrapProgram "$programPath" \
            --set CLOUDSDK_PYTHON "${pythonEnv}/bin/python" \
            --prefix PYTHONPATH : "${pythonEnv}/${python.sitePackages}" \
            --prefix PATH : "${openssl.bin}/bin"

        mkdir -p $out/bin
        ln -s $programPath $binaryPath
    done

    # disable component updater and update check
    substituteInPlace $out/google-cloud-sdk/lib/googlecloudsdk/core/config.json \
      --replace-fail "\"disable_updater\": false" "\"disable_updater\": true"
    echo "
    [component_manager]
    disable_update_check = true" >> $out/google-cloud-sdk/properties

    # setup bash completion
    mkdir -p $out/share/bash-completion/completions
    mv $out/google-cloud-sdk/completion.bash.inc $out/share/bash-completion/completions/gcloud
    ln -s $out/share/bash-completion/completions/gcloud $out/share/bash-completion/completions/gsutil

    # setup zsh completion
    mkdir -p $out/share/zsh/site-functions
    mv $out/google-cloud-sdk/completion.zsh.inc $out/share/zsh/site-functions/_gcloud
    ln -s $out/share/zsh/site-functions/_gcloud $out/share/zsh/site-functions/_gsutil
    # zsh doesn't load completions from $FPATH without #compdef as the first line
    sed -i '1 i #compdef gcloud' $out/share/zsh/site-functions/_gcloud

    # setup fish completion
    installShellCompletion --cmd gcloud \
      --fish <(echo "complete -c gcloud -f -a '(__fish_argcomplete_complete gcloud)'")
    installShellCompletion --cmd gsutil \
      --fish <(echo "complete -c gsutil -f -a '(__fish_argcomplete_complete gsutil)'")

    # This directory contains compiled mac binaries. We used crcmod from
    # nixpkgs instead.
    rm -r $out/google-cloud-sdk/platform/gsutil/third_party/crcmod \
          $out/google-cloud-sdk/platform/gsutil/third_party/crcmod_osx

    # remove tests and test data
    find $out -name tests -type d -exec rm -rf '{}' +
    rm $out/google-cloud-sdk/platform/gsutil/gslib/commands/test.py

    # compact all the JSON
    find $out -name \*.json | while read path; do
      jq -c . $path > $path.min
      mv $path.min $path
    done

    runHook postInstall
  '';

  doInstallCheck = true;
  installCheckPhase = ''
    # Avoid trying to write logs to homeless-shelter
    export HOME=$(mktemp -d)
    $out/bin/gcloud version --format json | jq '."Google Cloud SDK"' | grep "${version}"
  '';

  passthru = {
    inherit components withExtraComponents;
    updateScript = ./update.sh;
  };

  meta = with lib; {
    description = "Tools for the google cloud platform";
    longDescription = "The Google Cloud SDK for GCE hosts. Used by `google-cloud-sdk` only on GCE guests.";
    sourceProvenance = with sourceTypes; [
      fromSource
      binaryNativeCode  # anthoscli and possibly more
    ];
    # This package contains vendored dependencies. All have free licenses.
    license = licenses.free;
    homepage = "https://cloud.google.com/sdk/";
    changelog = "https://cloud.google.com/sdk/docs/release-notes";
    maintainers = with maintainers; [ iammrinal0 marcusramberg pradyuman stephenmw zimbatm ];
    platforms = builtins.attrNames data.googleCloudSdkPkgs;
    mainProgram = "gcloud";
  };
}
