nixpkgs/pkgs/development/compilers/flutter/flutter.nix

{ version
, patches
, dart
, src
}:

{ lib
, git
, stdenv
, which
}:

let
  self =
    stdenv.mkDerivation {
      name = "$flutter-${version}-unwrapped";

      buildInputs = [ git ];

      inherit src patches version;

      postPatch = ''
        patchShebangs --build ./bin/
      '';

      buildPhase = ''
        export FLUTTER_ROOT="$(pwd)"
        export FLUTTER_TOOLS_DIR="$FLUTTER_ROOT/packages/flutter_tools"
        export SCRIPT_PATH="$FLUTTER_TOOLS_DIR/bin/flutter_tools.dart"

        export SNAPSHOT_PATH="$FLUTTER_ROOT/bin/cache/flutter_tools.snapshot"
        export STAMP_PATH="$FLUTTER_ROOT/bin/cache/flutter_tools.stamp"

        export DART_SDK_PATH="${dart}"

        HOME=../.. # required for pub upgrade --offline, ~/.pub-cache
                   # path is relative otherwise it's replaced by /build/flutter

        pushd "$FLUTTER_TOOLS_DIR"
        ${dart}/bin/dart pub get --offline
        popd

        local revision="$(cd "$FLUTTER_ROOT"; git rev-parse HEAD)"
        ${dart}/bin/dart --snapshot="$SNAPSHOT_PATH" --packages="$FLUTTER_TOOLS_DIR/.dart_tool/package_config.json" "$SCRIPT_PATH"
        echo "$revision" > "$STAMP_PATH"
        echo -n "${version}" > version

        rm -r bin/cache/{artifacts,dart-sdk,downloads}
        rm bin/cache/*.stamp
      '';

      installPhase = ''
        runHook preInstall

        mkdir -p $out
        cp -r . $out
        mkdir -p $out/bin/cache/
        ln -sf ${dart} $out/bin/cache/dart-sdk

        runHook postInstall
      '';

      doInstallCheck = true;
      installCheckInputs = [ which ];
      installCheckPhase = ''
        runHook preInstallCheck

        export HOME="$(mktemp -d)"
        $out/bin/flutter config --android-studio-dir $HOME
        $out/bin/flutter config --android-sdk $HOME
        $out/bin/flutter --version | fgrep -q '${version}'

        runHook postInstallCheck
      '';

      passthru = {
        inherit dart;

        # The derivation containing the original Flutter SDK files.
        # When other derivations wrap this one, any unmodified files
        # found here should be included as-is, for tooling compatibility.
        sdk = self;
      };

      meta = with lib; {
        description = "Flutter is Google's SDK for building mobile, web and desktop with Dart";
        longDescription = ''
          Flutter is Google’s UI toolkit for building beautiful,
          natively compiled applications for mobile, web, and desktop from a single codebase.
        '';
        homepage = "https://flutter.dev";
        license = licenses.bsd3;
        platforms = [ "x86_64-linux" "aarch64-linux" ];
        maintainers = with maintainers; [ babariviere ericdallo ];
      };
    }
  ;
in
self