scripts/build_packages.py

# Copyright 2022 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""build_packages updates the set of binary packages needed by Chrome OS.

The build_packages process cross compiles all packages that have been
updated into the given sysroot and builds binary packages as a side-effect.
The output packages will be used by the build_image script to create a
bootable Chrome OS image.

If packages are specified in cli, only build those specific packages and any
dependencies they might need.

For the fastest builds, use --nowithautotest --noworkon.
"""

import argparse
import logging
import os
from typing import List, Optional, Tuple
import urllib.error
import urllib.request

from chromite.lib import build_target_lib
from chromite.lib import commandline
from chromite.lib import cros_build_lib
from chromite.lib import sysroot_lib
from chromite.service import sysroot
from chromite.utils import timer


def build_shell_bool_style_args(
    parser: commandline.ArgumentParser,
    name: str,
    default_val: bool,
    help_str: str,
    deprecation_note: str,
    alternate_name: Optional[str] = None,
) -> None:
    """Build the shell boolean input argument equivalent.

    There are two cases which we will need to handle,
    case 1: A shell boolean arg, which doesn't need to be re-worded in python.
    case 2: A shell boolean arg, which needs to be re-worded in python.
    Example below.
    For Case 1, for a given input arg name 'argA', we create three python
    arguments.
    --argA, --noargA, --no-argA. The arguments --argA and --no-argA will be
    retained after deprecating --noargA.
    For Case 2, for a given input arg name 'arg_A' we need to use alternate
    argument name 'arg-A'. we create four python arguments in this case.
    --arg_A, --noarg_A, --arg-A, --no-arg-A. The first two arguments will be
    deprecated later.
    TODO(b/218522717): Remove the creation of --noargA in case 1 and --arg_A and
    --noarg_A in case 2.

    Args:
      parser: The parser to update.
      name: The input argument name. This will be used as 'dest' variable name.
      default_val: The default value to assign.
      help_str: The help string for the input argument.
      deprecation_note: A deprecation note to use.
      alternate_name: Alternate argument to be used after deprecation.
    """
    arg = f"--{name}"
    shell_narg = f"--no{name}"
    py_narg = f"--no-{name}"
    alt_arg = f"--{alternate_name}" if alternate_name else None
    alt_py_narg = f"--no-{alternate_name}" if alternate_name else None
    default_val_str = f"{help_str} (Default: %(default)s)."

    if alternate_name:
        parser.add_argument(
            alt_arg,
            action="store_true",
            default=default_val,
            dest=name,
            help=default_val_str,
        )
        parser.add_argument(
            alt_py_narg,
            action="store_false",
            dest=name,
            help="Don't " + help_str.lower(),
        )

    parser.add_argument(
        arg,
        action="store_true",
        default=default_val,
        dest=name,
        deprecated=deprecation_note % alt_arg if alternate_name else None,
        help=default_val_str if not alternate_name else argparse.SUPPRESS,
    )
    parser.add_argument(
        shell_narg,
        action="store_false",
        dest=name,
        deprecated=deprecation_note % alt_py_narg
        if alternate_name
        else py_narg,
        help=argparse.SUPPRESS,
    )

    if not alternate_name:
        parser.add_argument(
            py_narg,
            action="store_false",
            dest=name,
            help="Don't " + help_str.lower(),
        )


def get_parser() -> commandline.ArgumentParser:
    """Creates the cmdline argparser, populates the options and description.

    Returns:
      Argument parser.
    """
    deprecation_note = "Argument will be removed July, 2022. Use %s instead."
    parser = commandline.ArgumentParser(description=__doc__)

    parser.add_argument(
        "-b",
        "--board",
        "--build-target",
        dest="board",
        default=cros_build_lib.GetDefaultBoard(),
        help="The board to build packages for.",
    )

    build_shell_bool_style_args(
        parser,
        "usepkg",
        True,
        "Use binary packages to bootstrap when possible.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        parser,
        "usepkgonly",
        False,
        "Use binary packages only to bootstrap; abort if any are missing.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        parser, "workon", True, "Force-build workon packages.", deprecation_note
    )
    build_shell_bool_style_args(
        parser,
        "withrevdeps",
        True,
        "Calculate reverse dependencies on changed ebuilds.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        parser,
        "cleanbuild",
        False,
        "Perform a clean build; delete sysroot if it exists before building.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        parser,
        "pretend",
        False,
        "Pretend building packages, just display which packages would have "
        "been installed.",
        deprecation_note,
    )

    # The --sysroot flag specifies the environment variables ROOT and PKGDIR.
    # This allows fetching and emerging of all packages to specified sysroot.
    # Note that --sysroot will setup the board normally in /build/$BOARD, if
    # it's not setup yet. It also expects the toolchain to already be installed
    # in the sysroot.
    # --usepkgonly and --norebuild are required, because building is not
    # supported when board_root is set.
    parser.add_argument(
        "--sysroot", type="path", help="Emerge packages to sysroot."
    )
    parser.add_argument(
        "--board_root",
        type="path",
        dest="sysroot",
        deprecated=deprecation_note % "--sysroot",
        help=argparse.SUPPRESS,
    )

    # CPU Governor related options.
    group = parser.add_argument_group("CPU Governor Options")
    build_shell_bool_style_args(
        group,
        "autosetgov",
        False,
        "Automatically set cpu governor to 'performance'.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        group,
        "autosetgov_sticky",
        False,
        "Remember --autosetgov setting for future runs.",
        deprecation_note,
        alternate_name="autosetgov-sticky",
    )

    # Chrome building related options.
    group = parser.add_argument_group("Chrome Options")
    build_shell_bool_style_args(
        group,
        "use_any_chrome",
        True,
        "Use any Chrome prebuilt available, even if the prebuilt doesn't "
        "match exactly.",
        deprecation_note,
        alternate_name="use-any-chrome",
    )
    build_shell_bool_style_args(
        group,
        "internal",
        False,
        "Build the internal version of chrome (set the chrome_internal USE "
        "flag).",
        deprecation_note,
    )
    build_shell_bool_style_args(
        group,
        "chrome",
        False,
        "Ensure chrome instead of chromium. Alias for "
        "--internal --no-use-any-chrome.",
        deprecation_note,
    )

    # Setup board related options.
    group = parser.add_argument_group("Setup Board Config Options")
    build_shell_bool_style_args(
        group,
        "skip_chroot_upgrade",
        False,
        "Skip the automatic chroot upgrade; use with care.",
        deprecation_note,
        alternate_name="skip-chroot-upgrade",
    )
    build_shell_bool_style_args(
        group,
        "skip_toolchain_update",
        False,
        "Skip automatic toolchain update",
        deprecation_note,
        alternate_name="skip-toolchain-update",
    )
    build_shell_bool_style_args(
        group,
        "skip_setup_board",
        False,
        "Skip running setup_board. Implies "
        "--skip-chroot-upgrade --skip-toolchain-update.",
        deprecation_note,
        alternate_name="skip-setup-board",
    )

    # Image Type selection related options.
    group = parser.add_argument_group("Image Type Options")
    build_shell_bool_style_args(
        group,
        "withdev",
        True,
        "Build useful developer friendly utilities.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        group,
        "withdebug",
        True,
        "Build debug versions of Chromium-OS-specific packages.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        group, "withfactory", True, "Build factory installer.", deprecation_note
    )
    build_shell_bool_style_args(
        group,
        "withtest",
        True,
        "Build packages required for testing.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        group,
        "withautotest",
        True,
        "Build autotest client code.",
        deprecation_note,
    )
    build_shell_bool_style_args(
        group,
        "withdebugsymbols",
        False,
        "Install the debug symbols for all packages.",
        deprecation_note,
    )

    # Advanced Options.
    group = parser.add_argument_group("Advanced Options")
    group.add_argument(
        "--accept-licenses", help="Licenses to append to the accept list."
    )
    group.add_argument(
        "--accept_licenses",
        deprecated=deprecation_note % "--accept-licenses",
        help=argparse.SUPPRESS,
    )
    build_shell_bool_style_args(
        group,
        "eclean",
        True,
        "Run eclean to delete old binpkgs.",
        deprecation_note,
    )
    group.add_argument(
        "--jobs",
        type=int,
        default=os.cpu_count(),
        help="Number of packages to build in parallel. "
        "(Default: %(default)s)",
    )
    build_shell_bool_style_args(
        group,
        "rebuild",
        True,
        "Automatically rebuild dependencies.",
        deprecation_note,
    )
    # TODO(b/218522717): Remove the --nonorebuild argument support.
    group.add_argument(
        "--nonorebuild",
        action="store_true",
        dest="rebuild",
        deprecated=deprecation_note % "--rebuild",
        help=argparse.SUPPRESS,
    )
    build_shell_bool_style_args(
        group,
        "expandedbinhosts",
        True,
        "Allow expanded binhost inheritance.",
        deprecation_note,
    )
    group.add_argument(
        "--backtrack",
        type=int,
        default=sysroot.BACKTRACK_DEFAULT,
        help="See emerge --backtrack.",
    )

    # The --reuse-pkgs-from-local-boards flag tells Portage to share binary
    # packages between boards that are built locally, so that the total time
    # required to build several boards is reduced. This flag is only useful
    # when you are not able to use remote binary packages, since remote binary
    # packages are usually more up to date than anything you have locally.
    build_shell_bool_style_args(
        group,
        "reuse_pkgs_from_local_boards",
        False,
        "Bootstrap from local packages instead of remote packages.",
        deprecation_note,
        alternate_name="reuse-pkgs-from-local-boards",
    )

    # --run-goma option is designed to be used on bots.
    # If you're trying to build packages with goma in your local dev env, this
    # is *not* the option you're looking for. Please see comments below.
    # This option; 1) starts goma, 2) builds packages (expecting that goma is
    # used), then 3) stops goma explicitly.
    # 4) is a request from the goma team, so that stats/logs can be taken.
    # Note: GOMA_DIR is expected to be passed via env var.
    #
    # In local dev env cases, compiler_proxy is expected to keep running.
    # In such a case;
    #   $ python ${GOMA_DIR}/goma_ctl.py ensure_start
    #   $ build_packages (... and options without --run-goma ...)
    # is an expected commandline sequence. If you set --run-goma flag while
    # compiler_proxy is already running, the existing compiler_proxy will be
    # stopped.
    build_shell_bool_style_args(
        group,
        "run_goma",
        False,
        "When set, (re)starts goma, builds packages, and then stops goma.",
        deprecation_note,
        alternate_name="run-goma",
    )
    # This option is for building chrome remotely.
    # 1) starts reproxy 2) builds chrome with reproxy and 3) stops reproxy so
    # logs/stats can be collected.
    # Note: RECLIENT_DIR and REPROXY_CFG env var will be deprecated July, 2022.
    # Use --reclient-dir and --reproxy-cfg input options instead.
    build_shell_bool_style_args(
        group,
        "run_remoteexec",
        False,
        "If set to true, starts RBE reproxy, builds packages, and then stops "
        "reproxy.",
        deprecation_note,
    )

    parser.add_argument("packages", nargs="*", help="Packages to build.")
    return parser


def parse_args(
    argv: List[str],
) -> Tuple[commandline.ArgumentParser, commandline.ArgumentNamespace]:
    """Parse and validate CLI arguments.

    Args:
      argv: Arguments passed via CLI.

    Returns:
      Tuple having the below two,
      Argument Parser
      Validated argument namespace.
    """
    parser = get_parser()
    opts = parser.parse_args(argv)

    if opts.chrome:
        opts.internal_chrome = True
        opts.use_any_chrome = False

    opts.setup_board_run_config = sysroot.SetupBoardRunConfig(
        force=opts.cleanbuild,
        usepkg=opts.usepkg,
        jobs=opts.jobs,
        quiet=True,
        update_toolchain=not opts.skip_toolchain_update,
        upgrade_chroot=not opts.skip_chroot_upgrade,
        local_build=opts.reuse_pkgs_from_local_boards,
        expanded_binhost_inheritance=opts.expandedbinhosts,
        backtrack=opts.backtrack,
    )
    opts.build_run_config = sysroot.BuildPackagesRunConfig(
        usepkg=opts.usepkg,
        install_debug_symbols=opts.withdebugsymbols,
        packages=opts.packages,
        use_goma=opts.run_goma,
        use_remoteexec=opts.run_remoteexec,
        incremental_build=opts.withrevdeps,
        dryrun=opts.pretend,
        usepkgonly=opts.usepkgonly,
        workon=opts.workon,
        install_auto_test=opts.withautotest,
        autosetgov=opts.autosetgov,
        autosetgov_sticky=opts.autosetgov_sticky,
        use_any_chrome=opts.use_any_chrome,
        internal_chrome=opts.internal,
        clean_build=opts.cleanbuild,
        eclean=opts.eclean,
        rebuild_dep=opts.rebuild,
        jobs=opts.jobs,
        local_pkg=opts.reuse_pkgs_from_local_boards,
        dev_image=opts.withdev,
        factory_image=opts.withfactory,
        test_image=opts.withtest,
        debug_version=opts.withdebug,
        backtrack=opts.backtrack,
    )
    opts.Freeze()
    return parser, opts


@timer.timed("Elapsed time (build_packages)")
def main(argv: Optional[List[str]] = None) -> Optional[int]:
    commandline.RunInsideChroot()
    parser, opts = parse_args(argv)

    # If the opts.board is not set, then it means user hasn't specified a
    # default board in 'src/scripts/.default_board' and didn't specify it as
    # input argument.
    if not opts.board:
        parser.error("--board is required")

    build_target = build_target_lib.BuildTarget(
        opts.board, build_root=opts.sysroot
    )
    board_root = sysroot_lib.Sysroot(build_target.root)

    try:
        # TODO(xcl): Update run_configs to have a common base set of configs for
        # setup_board and build_packages.
        if not opts.skip_setup_board:
            sysroot.SetupBoard(
                build_target,
                accept_licenses=opts.accept_licenses,
                run_configs=opts.setup_board_run_config,
            )

        sysroot.BuildPackages(build_target, board_root, opts.build_run_config)
    except sysroot_lib.PackageInstallError as e:
        try:
            with urllib.request.urlopen(
                "https://chromiumos-status.appspot.com/current?format=raw"
            ) as request:
                logging.notice("Tree Status: %s", request.read().decode())
        except urllib.error.HTTPError:
            pass
        cros_build_lib.Die(e)