# Copyright 2018 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/config/chrome_build.gni")
import("//build/config/chromeos/args.gni")
import("//build/config/chromeos/ui_mode.gni")
import("//build/config/gclient_args.gni")
import("//build/config/python.gni")
import("//build/util/generate_wrapper.gni")

assert((is_chromeos_ash || is_chromeos_lacros) && is_chromeos_device)

# Determine the real paths for various items in the SDK, which may be used
# in the 'generate_runner_script' template below. We do so outside the template
# to confine exec_script to a single invocation.
if (cros_sdk_version != "") {
  # Ideally these should be maps, however, gn doesn't support map, so using a
  # list of list to simulate a map:
  # [key1, [value1, value2, ...]], [key2, [value1, value2, ...]], where
  # the keys are boards and values are symlinks or symlink targets, and the
  # mapping shouldn't be used for anything else.
  #
  # A sample usage is:
  # foreach(m, _symlink_targets_map) {
  #   if(m[0] == target_key) {
  #     target_value = m[1]
  #   }
  # }
  #
  _symlink_map = []
  _symlink_targets_map = []

  if (is_chromeos_ash) {
    _potential_test_boards = [ cros_board ]
  } else {
    _potential_test_boards = []
    if (cros_boards != "") {
      _potential_test_boards += string_split(cros_boards, ":")
    }
    if (cros_boards_with_qemu_images != "") {
      _potential_test_boards += string_split(cros_boards_with_qemu_images, ":")
    }
  }

  foreach(b, _potential_test_boards) {
    _cache_path_prefix =
        "//build/cros_cache/chrome-sdk/symlinks/${b}+${cros_sdk_version}"

    _cros_is_vm = false
    foreach(b1, string_split(cros_boards_with_qemu_images, ":")) {
      if (b == b1) {
        _cros_is_vm = true
      }
    }

    _symlinks = []
    _symlinks = [
      # Tast harness & test data.
      rebase_path("${_cache_path_prefix}+chromeos-base/tast-cmd"),
      rebase_path("${_cache_path_prefix}+chromeos-base/tast-remote-tests-cros"),

      # Binutils (and other toolchain tools) used to deploy Chrome to the device.
      rebase_path(
          "${_cache_path_prefix}+environment_chromeos-base_chromeos-chrome.tar.xz"),
      rebase_path("${_cache_path_prefix}+target_toolchain"),
    ]
    if (_cros_is_vm) {
      # VM-related tools.
      _symlinks += [
        rebase_path("${_cache_path_prefix}+sys-firmware/seabios"),
        rebase_path("${_cache_path_prefix}+chromiumos_qemu_image.tar.xz"),
        rebase_path("${_cache_path_prefix}+app-emulation/qemu"),
      ]
    }
    _symlink_map += [ [
          b,
          _symlinks,
        ] ]
  }

  _all_symlinks = []
  foreach(m, _symlink_map) {
    _all_symlinks += m[1]
  }
  _all_symlink_targets =
      exec_script("//build/get_symlink_targets.py", _all_symlinks, "list lines")
  _index = 0
  foreach(m, _symlink_map) {
    _symlink_targets = []
    foreach(_, m[1]) {
      _symlink_targets += [ _all_symlink_targets[_index] ]
      _index += 1
    }

    _symlink_targets_map += [ [
          m[0],
          _symlink_targets,
        ] ]
  }
}

# Creates a script at $generated_script that can be used to launch a cros VM
# and optionally run a test within it.
# Args:
#   test_exe: Name of test binary located in the out dir. This will get copied
#       to the VM and executed there.
#   tast_attr_expr: Tast expression to pass to local_test_runner on the VM.
#   tast_tests: List of Tast tests to run on the VM. Note that when this is
#       specified, the target name used to invoke this template will be
#       designated as the "name" of this test and will primarly used for test
#       results tracking and displaying (eg: flakiness dashboard).
#   generated_script: Path to place the generated script.
#   deploy_chrome: If true, deploys a locally built chrome located in the root
#       build dir to the VM or DUT after launching it.
#   deploy_lacros: If true, deploys a locally built Lacros located in the root
#       build dir to the VM or DUT after launching it.
#   runtime_deps_file: Path to file listing runtime deps for the test. If set,
#       all files listed will be copied to the VM before testing.
#   skip_generating_board_args: By default, this template generates an '--board'
#       arg with corresponding '--flash' or '--use-vm' args for device and vm
#       respectively. This argument instructs the template to skip generating
#       them, and it's designed for use cases where one builds for one board
#       (e.g. amd64-generic), but tests on a different board (e.g. eve).
#   tast_vars: A list of "key=value" runtime variable pairs to pass to invoke
#       the Tast tests. For more details, please see:
#       https://chromium.googlesource.com/chromiumos/platform/tast/+/HEAD/docs/writing_tests.md#Runtime-variables
template("generate_runner_script") {
  forward_variables_from(invoker,
                         [
                           "deploy_chrome",
                           "deploy_lacros",
                           "generated_script",
                           "runtime_deps_file",
                           "skip_generating_board_args",
                           "tast_attr_expr",
                           "tast_tests",
                           "tast_vars",
                           "testonly",
                           "test_exe",
                         ])

  if (!defined(skip_generating_board_args)) {
    skip_generating_board_args = false
  }

  if (skip_generating_board_args) {
    # cros_board is not needed, so setting it to empty to avoid being used
    # accidentally below.
    cros_board = ""
    not_needed([ cros_board ])
  }

  if (!defined(deploy_chrome)) {
    deploy_chrome = false
  }
  if (!defined(deploy_lacros)) {
    deploy_lacros = false
  }
  assert(!(deploy_chrome && deploy_lacros),
         "deploy_chrome and deploy_lacros are exclusive.")

  is_tast = defined(tast_attr_expr) || defined(tast_tests)
  assert(!(is_tast && defined(test_exe)),
         "Tast tests are invoked from binaries shipped with the VM image. " +
             "There should be no locally built binary needed.")
  assert(is_tast || !defined(tast_vars),
         "tast_vars is only support for Tast tests")

  # If we're in the cros chrome-sdk (and not the raw ebuild), the test will
  # need some additional runtime data located in the SDK cache.
  _sdk_data = []
  if (cros_sdk_version != "") {
    assert(defined(generated_script),
           "Must specify where to place generated test launcher script via " +
               "'generated_script'")

    foreach(b, _potential_test_boards) {
      _cros_is_vm = false
      foreach(b1, string_split(cros_boards_with_qemu_images, ":")) {
        if (b == b1) {
          _cros_is_vm = true
        }
      }

      # Determine the real paths for various items in the SDK, which may be used
      # in the 'generate_runner_script' template below.
      if (is_tast || _cros_is_vm || deploy_chrome) {
        _symlink_targets = []
        foreach(m, _symlink_targets_map) {
          if (b == m[0]) {
            _symlink_targets = []
            _symlink_targets = m[1]
          }
        }

        if (is_tast) {
          # Add tast sdk items.
          _sdk_data += [
            _symlink_targets[0],
            _symlink_targets[1],
          ]
        }
        if (deploy_chrome) {
          # To deploy chrome to the VM, it needs to be stripped down to fit into
          # the VM. This is done by using binutils in the toolchain. So add the
          # toolchain to the data.
          _sdk_data += [
            _symlink_targets[2],
            _symlink_targets[3],
          ]
        }
        if (_cros_is_vm) {
          # Add vm sdk items.
          _sdk_data += [
            _symlink_targets[4],
            _symlink_targets[5],
            _symlink_targets[6],
          ]
        }
      }
    }
  }

  generate_wrapper(target_name) {
    executable = "//build/chromeos/test_runner.py"
    use_vpython3 = true
    wrapper_script = generated_script
    executable_args = []

    if (defined(runtime_deps_file)) {
      write_runtime_deps = runtime_deps_file
    }

    # Build executable_args for the three different test types: GTest, Tast,
    # and host-side commands (eg telemetry).
    if (defined(test_exe)) {
      executable_args += [
        "gtest",
        "--test-exe",
        test_exe,
      ]
      if (defined(runtime_deps_file)) {
        executable_args += [
          "--runtime-deps-path",
          rebase_path(runtime_deps_file, root_build_dir),
        ]
      }
    } else if (is_tast) {
      # When --tast-tests is specified, test_runner.py will call
      # local_test_runner on the VM to run the set of tests.
      executable_args += [
        "tast",
        "--suite-name",
        target_name,
      ]
      if (defined(tast_attr_expr)) {
        executable_args += [
          "--attr-expr",
          tast_attr_expr,
        ]
      } else {
        foreach(test, tast_tests) {
          executable_args += [
            "-t",
            test,
          ]
        }
      }
      if (defined(tast_vars)) {
        foreach(var, tast_vars) {
          executable_args += [
            "--tast-var",
            var,
          ]
        }
      }
    } else {
      executable_args += [ "host-cmd" ]
    }
    executable_args += [
      "--cros-cache",
      "build/cros_cache/",
      "--path-to-outdir",
      rebase_path(root_out_dir, "//"),
      "-v",
    ]

    if (!skip_generating_board_args) {
      executable_args += [
        "--board",
        cros_board,
      ]

      _cros_is_vm = false
      foreach(b, string_split(cros_boards_with_qemu_images, ":")) {
        if (cros_board == b) {
          _cros_is_vm = true
        }
      }
      if (_cros_is_vm) {
        executable_args += [ "--use-vm" ]
      } else {
        executable_args += [ "--flash" ]
      }
    }

    # If we have public Chromium builds, use public Chromium OS images when
    # flashing the test device.
    if (!is_chrome_branded) {
      executable_args += [ "--public-image" ]
    }

    if (deploy_lacros) {
      executable_args += [ "--deploy-lacros" ]
    }

    if (deploy_chrome && !defined(test_exe) && !is_tast) {
      executable_args += [ "--deploy-chrome" ]
    }

    # executable_args should be finished, now build the data and deps lists.
    deps = [ "//testing/buildbot/filters:chromeos_filters" ]
    if (defined(invoker.deps)) {
      deps += invoker.deps
    }
    data = [
      "//.vpython",
      "//.vpython3",

      # We use android test-runner's results libs to construct gtest output
      # json.
      "//build/android/pylib/__init__.py",
      "//build/android/pylib/base/",
      "//build/android/pylib/results/",
      "//build/chromeos/",

      # Needed for various SDK components used below.
      "//build/cros_cache/chrome-sdk/misc/",
      "//build/cros_cache/chrome-sdk/symlinks/",

      # The LKGM file controls what version of the VM image to download. Add it
      # as data here so that changes to it will trigger analyze.
      "//chromeos/CHROMEOS_LKGM",
      "//third_party/chromite/",
    ]

    data += _sdk_data

    if (defined(invoker.data)) {
      data += invoker.data
    }

    data_deps = [ "//testing:test_scripts_shared" ]
    if (defined(invoker.data_deps)) {
      data_deps += invoker.data_deps
    }
  }
}

template("tast_test") {
  forward_variables_from(invoker, "*")

  # Default the expression to match any chrome-related test.
  if (!defined(tast_attr_expr) && !defined(tast_tests)) {
    # The following expression filters out all non-critical tests. See the link
    # below for more details:
    # https://chromium.googlesource.com/chromiumos/platform/tast/+/master/docs/test_attributes.md
    tast_attr_expr = "\"group:mainline\" && \"dep:chrome\""

    if (defined(enable_tast_informational_tests) &&
        enable_tast_informational_tests) {
      tast_attr_expr += " && informational"
    } else {
      tast_attr_expr += " && !informational"
    }
    if (!is_chrome_branded) {
      tast_attr_expr += " && !\"dep:chrome_internal\""
    }
  } else {
    assert(defined(tast_attr_expr) != defined(tast_tests),
           "Specify one of tast_tests or tast_attr_expr.")
  }

  # Append any disabled tests to the expression.
  if (defined(tast_disabled_tests)) {
    assert(defined(tast_attr_expr),
           "tast_attr_expr must be used when specifying tast_disabled_tests.")
    foreach(test, tast_disabled_tests) {
      tast_attr_expr += " && !\"name:${test}\""
    }
  }
  if (defined(tast_attr_expr)) {
    tast_attr_expr = "( " + tast_attr_expr + " )"
  }
  generate_runner_script(target_name) {
    testonly = true
    generated_script = "$root_build_dir/bin/run_${target_name}"
    runtime_deps_file = "$root_out_dir/${target_name}.runtime_deps"
    deploy_chrome = true
    data_deps = [
      "//:chromiumos_preflight",  # Builds the browser.
      "//chromeos:cros_chrome_deploy",  # Adds additional browser run-time deps.

      # Tools used to symbolize Chrome crash dumps.
      # TODO(crbug.com/1156772): Remove these if/when all tests pick them up by
      # default.
      "//third_party/breakpad:dump_syms",
      "//third_party/breakpad:minidump_dump",
      "//third_party/breakpad:minidump_stackwalk",
    ]

    data = [ "//components/crash/content/tools/generate_breakpad_symbols.py" ]
  }
}

template("lacros_tast_tests") {
  forward_variables_from(invoker,
                         [
                           "tast_attr_expr",
                           "tast_disabled_tests",
                           "tast_tests",
                         ])
  assert(defined(tast_attr_expr) != defined(tast_tests),
         "Specify one of tast_tests or tast_attr_expr.")

  # Append any disabled tests to the expression.
  if (defined(tast_disabled_tests)) {
    assert(defined(tast_attr_expr),
           "tast_attr_expr must be used when specifying tast_disabled_tests.")
    foreach(test, tast_disabled_tests) {
      tast_attr_expr += " && !\"name:${test}\""
    }
  }
  if (defined(tast_attr_expr)) {
    tast_attr_expr = "( " + tast_attr_expr + " )"
  }

  generate_runner_script(target_name) {
    testonly = true
    deploy_lacros = true
    generated_script = "$root_build_dir/bin/run_${target_name}"
    runtime_deps_file = "$root_out_dir/${target_name}.runtime_deps"

    # At build time, Lacros tests don't know whether they'll run on VM or HW,
    # and instead, these flags are specified at runtime when invoking the
    # generated runner script.
    skip_generating_board_args = true

    # By default, tast tests download a lacros-chrome from a gcs location and
    # use it for testing. To support running lacros tast tests from Chromium CI,
    # a Var is added to support pointing the tast tests to use a specified
    # pre-deployed lacros-chrome. The location is decided by:
    # https://source.chromium.org/chromium/chromium/src/+/master:third_party/chromite/scripts/deploy_chrome.py;l=80;drc=86f1234a4be8e9574442e076cdc835897f7bea61
    tast_vars = [ "lacrosDeployedBinary=/usr/local/lacros-chrome" ]

    # Lacros tast tests may have different test expectations based on whether
    # they're for Chromium or Chrome.
    tast_vars += [ "lacrosIsChromeBranded=$is_chrome_branded" ]

    data_deps = [
      "//chrome",  # Builds the browser.

      # Tools used to symbolize Chrome crash dumps.
      # TODO(crbug.com/1156772): Remove these if/when all tests pick them up by
      # default.
      "//third_party/breakpad:dump_syms",
      "//third_party/breakpad:minidump_dump",
      "//third_party/breakpad:minidump_stackwalk",
    ]

    data = [
      "//components/crash/content/tools/generate_breakpad_symbols.py",

      # A script needed to launch Lacros in Lacros Tast tests.
      "//build/lacros/mojo_connection_lacros_launcher.py",
    ]
  }
}