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

"""setup_board builds the sysroot for a board.

The setup_board process includes the simple directory creations, installs
several configuration files, sets up portage command wrappers and configs,
and installs the toolchain and some core dependency packages (e.g. kernel
headers, gcc-libs).
"""

import argparse

from chromite.lib import build_target_lib
from chromite.lib import commandline
from chromite.lib import cros_build_lib
from chromite.lib import portage_util
from chromite.service import sysroot


def GetParser():
    """Build the argument parser."""
    # TODO(crbug.com/922144) Remove underscore separated arguments and the
    # deprecated message after 2019-06-01.
    deprecated = "Argument will be removed 2019-06-01. Use %s instead."
    parser = commandline.ArgumentParser(description=__doc__)

    parser.add_argument(
        "-b",
        "--board",
        "--build-target",
        required=True,
        dest="board",
        help="The name of the board to set up.",
    )
    parser.add_argument(
        "--default",
        action="store_true",
        default=False,
        help="Set the board to the default board in your chroot.",
    )
    parser.add_argument(
        "--force",
        action="store_true",
        default=False,
        help="Force re-creating the board root.",
    )
    # The positive and negative versions of the arguments are used.
    # TODO(saklein) Simplify usages to a single version of the argument.
    parser.add_argument(
        "--usepkg",
        action="store_true",
        default=True,
        dest="usepkg",
        help="Use binary packages to bootstrap.",
    )
    parser.add_argument(
        "--nousepkg",
        action="store_false",
        default=True,
        dest="usepkg",
        help="Do not use binary packages to bootstrap.",
    )

    advanced = parser.add_argument_group("Advanced Options")
    advanced.add_argument(
        "--accept-licenses", help="Licenses to append to the accept list."
    )

    # Build target related arguments.
    target = parser.add_argument_group("Advanced Build Target Options")
    target.add_argument(
        "--profile",
        help="The portage configuration profile to use. Profile "
        "must be located in overlay-board/profiles.",
    )
    target.add_argument("--variant", help="Board variant.")
    target.add_argument("--board-root", type="path", help="Board root.")

    # Arguments related to the build itself.
    build = parser.add_argument_group("Advanced Build Modification Options")
    build.add_argument(
        "--jobs",
        type=int,
        help="Maximum number of packages to build in parallel.",
    )
    build.add_argument(
        "--regen-configs",
        action="store_true",
        default=False,
        help="Regenerate all config files (useful for "
        "modifying profiles without rebuild).",
    )
    build.add_argument(
        "--quiet",
        action="store_true",
        default=False,
        help="Don't print warnings when board already exists.",
    )
    build.add_argument(
        "--skip-toolchain-update",
        action="store_true",
        default=False,
        help="Don't update toolchain automatically.",
    )
    # TODO(build): Delete by end of 2023.
    build.add_argument(
        "--skip_toolchain_update",
        action="store_true",
        default=False,
        deprecated=deprecated % "--skip-toolchain-update",
        help="Deprecated form of --skip-toolchain-update.",
    )
    build.add_argument(
        "--skip-chroot-upgrade",
        action="store_true",
        default=False,
        help="Don't run the chroot upgrade automatically; use with care.",
    )
    # TODO(build): Delete by end of 2023.
    build.add_argument(
        "--skip_chroot_upgrade",
        action="store_true",
        default=False,
        deprecated=deprecated % "--skip-chroot-upgrade",
        help="Deprecated form of --skip-chroot-upgrade.",
    )
    build.add_argument(
        "--skip-board-pkg-init",
        action="store_true",
        default=False,
        help="Don't emerge any packages during setup_board into "
        "the board root.",
    )
    build.add_argument(
        "--reuse-pkgs-from-local-boards",
        dest="reuse_local",
        action="store_true",
        default=False,
        help="Bootstrap from local packages instead of remote packages.",
    )
    build.add_argument(
        "--backtrack",
        type=int,
        default=sysroot.BACKTRACK_DEFAULT,
        help="See emerge --backtrack.",
    )

    parser.add_argument(
        "--fewer-binhosts",
        dest="expanded_binhost_inheritance",
        default=True,
        action="store_false",
        help=argparse.SUPPRESS,
    )

    return parser


def _ParseArgs(args):
    """Parse and validate arguments."""
    parser = GetParser()
    opts = parser.parse_args(args)

    # Translate raw options to config objects.
    name = "%s_%s" % (opts.board, opts.variant) if opts.variant else opts.board
    opts.build_target = build_target_lib.BuildTarget(
        name, build_root=opts.board_root, profile=opts.profile
    )

    opts.run_config = sysroot.SetupBoardRunConfig(
        set_default=opts.default,
        force=opts.force,
        usepkg=opts.usepkg,
        jobs=opts.jobs,
        regen_configs=opts.regen_configs,
        quiet=opts.quiet,
        update_toolchain=not opts.skip_toolchain_update,
        upgrade_chroot=not opts.skip_chroot_upgrade,
        init_board_pkgs=not opts.skip_board_pkg_init,
        local_build=opts.reuse_local,
        expanded_binhost_inheritance=opts.expanded_binhost_inheritance,
        use_cq_prebuilts=opts.usepkg,
        backtrack=opts.backtrack,
    )

    opts.Freeze()
    return opts


def main(argv):
    commandline.RunInsideChroot()
    opts = _ParseArgs(argv)
    try:
        sysroot.SetupBoard(
            opts.build_target, opts.accept_licenses, opts.run_config
        )
    except portage_util.MissingOverlayError as e:
        # Add a bit more user friendly message as people can typo names easily.
        cros_build_lib.Die(
            "%s\n"
            "Double check the --board setting and make sure you're syncing the "
            "right manifest (internal-vs-external).",
            e,
        )
    except sysroot.Error as e:
        cros_build_lib.Die(e)