# Copyright 2010-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

__all__ = ["doebuild", "doebuild_environment", "spawn", "spawnebuild"]

import grp
import gzip
import errno
import fnmatch
import io
from itertools import chain
import logging
import os as _os
import platform
import pwd
import re
import signal
import stat
import sys
import tempfile
from textwrap import wrap
import time
import warnings
import zlib

import portage

portage.proxy.lazyimport.lazyimport(
    globals(),
    "portage.package.ebuild.config:check_config_instance",
    "portage.package.ebuild.digestcheck:digestcheck",
    "portage.package.ebuild.digestgen:digestgen",
    "portage.package.ebuild.fetch:_drop_privs_userfetch,_want_userfetch,fetch",
    "portage.package.ebuild.prepare_build_dirs:_prepare_fake_distdir",
    "portage.package.ebuild._ipc.QueryCommand:QueryCommand",
    "portage.dep._slot_operator:evaluate_slot_operator_equal_deps",
    "portage.package.ebuild._spawn_nofetch:spawn_nofetch",
    "portage.util.elf.header:ELFHeader",
    "portage.dep.soname.multilib_category:compute_multilib_category",
    "portage.util._desktop_entry:validate_desktop_entry",
    "portage.util._dyn_libs.NeededEntry:NeededEntry",
    "portage.util._dyn_libs.soname_deps:SonameDepsProcessor",
    "portage.util._async.SchedulerInterface:SchedulerInterface",
    "portage.util._eventloop.global_event_loop:global_event_loop",
    "portage.util.ExtractKernelVersion:ExtractKernelVersion",
)

from portage import (
    bsd_chflags,
    eapi_is_supported,
    merge,
    os,
    selinux,
    shutil,
    unmerge,
    _encodings,
    _os_merge,
    _shell_quote,
    _unicode_decode,
    _unicode_encode,
)
from portage.const import (
    EBUILD_SH_ENV_FILE,
    EBUILD_SH_ENV_DIR,
    EBUILD_SH_BINARY,
    INVALID_ENV_FILE,
    MISC_SH_BINARY,
    PORTAGE_PYM_PACKAGES,
)
from portage.data import portage_gid, portage_uid, secpass, uid, userpriv_groups
from portage.dbapi.porttree import _parse_uri_map
from portage.dep import (
    Atom,
    check_required_use,
    human_readable_required_use,
    paren_enclose,
    use_reduce,
)
from portage.eapi import (
    eapi_exports_KV,
    eapi_exports_merge_type,
    eapi_exports_replace_vars,
    eapi_exports_REPOSITORY,
    eapi_has_required_use,
    eapi_has_src_prepare_and_src_configure,
    eapi_has_pkg_pretend,
    _get_eapi_attrs,
)
from portage.elog import elog_process, _preload_elog_modules
from portage.elog.messages import eerror, eqawarn
from portage.exception import (
    DigestException,
    FileNotFound,
    IncorrectParameter,
    InvalidData,
    InvalidDependString,
    PermissionDenied,
    UnsupportedAPIException,
)
from portage.localization import _
from portage.output import colormap
from portage.package.ebuild.prepare_build_dirs import prepare_build_dirs
from portage.process import find_binary
from portage.util import (
    apply_recursive_permissions,
    apply_secpass_permissions,
    noiselimit,
    shlex_split,
    varexpand,
    writemsg,
    writemsg_stdout,
    write_atomic,
)
from portage.util.cpuinfo import get_cpu_count
from portage.util.lafilefixer import rewrite_lafile
from portage.util.compression_probe import _compressors
from portage.util.futures import asyncio
from portage.util.futures.executor.fork import ForkExecutor
from portage.util.path import first_existing
from portage.util.socks5 import get_socks5_proxy
from portage.util._dyn_libs.dyn_libs import check_dyn_libs_inconsistent
from portage.versions import _pkgsplit
from _emerge.BinpkgEnvExtractor import BinpkgEnvExtractor
from _emerge.EbuildBuildDir import EbuildBuildDir
from _emerge.EbuildPhase import EbuildPhase
from _emerge.EbuildSpawnProcess import EbuildSpawnProcess
from _emerge.Package import Package
from _emerge.RootConfig import RootConfig

_unsandboxed_phases = frozenset(
    [
        "clean",
        "cleanrm",
        "config",
        "help",
        "info",
        "postinst",
        "preinst",
        "pretend",
        "postrm",
        "prerm",
        "setup",
    ]
)

# phases in which IPC with host is allowed
_ipc_phases = frozenset(
    [
        "setup",
        "pretend",
        "config",
        "info",
        "preinst",
        "postinst",
        "prerm",
        "postrm",
    ]
)

# phases which execute in the global PID namespace
_global_pid_phases = frozenset(
    ["config", "depend", "preinst", "prerm", "postinst", "postrm"]
)

_phase_func_map = {
    "config": "pkg_config",
    "setup": "pkg_setup",
    "nofetch": "pkg_nofetch",
    "unpack": "src_unpack",
    "prepare": "src_prepare",
    "configure": "src_configure",
    "compile": "src_compile",
    "test": "src_test",
    "install": "src_install",
    "preinst": "pkg_preinst",
    "postinst": "pkg_postinst",
    "prerm": "pkg_prerm",
    "postrm": "pkg_postrm",
    "info": "pkg_info",
    "pretend": "pkg_pretend",
}

_vdb_use_conditional_keys = Package._dep_keys + (
    "LICENSE",
    "PROPERTIES",
    "RESTRICT",
)


def _doebuild_spawn(phase, settings, actionmap=None, **kwargs):
    """
    All proper ebuild phases which execute ebuild.sh are spawned
    via this function. No exceptions.
    """

    if phase in _unsandboxed_phases:
        kwargs["free"] = True

    kwargs["ipc"] = "ipc-sandbox" not in settings.features or phase in _ipc_phases
    kwargs["mountns"] = "mount-sandbox" in settings.features
    kwargs["networked"] = (
        "network-sandbox" not in settings.features
        or (phase == "unpack" and "live" in settings["PORTAGE_PROPERTIES"].split())
        or (
            phase == "test" and "test_network" in settings["PORTAGE_PROPERTIES"].split()
        )
        or phase in _ipc_phases
        or "network-sandbox" in settings["PORTAGE_RESTRICT"].split()
    )
    kwargs["pidns"] = (
        "pid-sandbox" in settings.features and phase not in _global_pid_phases
    )

    if phase == "depend":
        kwargs["droppriv"] = "userpriv" in settings.features
        # It's not necessary to close_fds for this phase, since
        # it should not spawn any daemons, and close_fds is
        # best avoided since it can interact badly with some
        # garbage collectors (see _setup_pipes docstring).
        kwargs["close_fds"] = False

    if actionmap is not None and phase in actionmap:
        kwargs.update(actionmap[phase]["args"])
        cmd = actionmap[phase]["cmd"] % phase
    else:
        if phase == "cleanrm":
            ebuild_sh_arg = "clean"
        else:
            ebuild_sh_arg = phase

        cmd = "%s %s" % (
            _shell_quote(
                os.path.join(
                    settings["PORTAGE_BIN_PATH"], os.path.basename(EBUILD_SH_BINARY)
                )
            ),
            ebuild_sh_arg,
        )

    settings["EBUILD_PHASE"] = phase
    try:
        return spawn(cmd, settings, **kwargs)
    finally:
        settings.pop("EBUILD_PHASE", None)


def _spawn_phase(
    phase, settings, actionmap=None, returnpid=False, logfile=None, **kwargs
):

    if returnpid:
        return _doebuild_spawn(
            phase,
            settings,
            actionmap=actionmap,
            returnpid=returnpid,
            logfile=logfile,
            **kwargs
        )

    # The logfile argument is unused here, since EbuildPhase uses
    # the PORTAGE_LOG_FILE variable if set.
    ebuild_phase = EbuildPhase(
        actionmap=actionmap,
        background=False,
        phase=phase,
        scheduler=SchedulerInterface(asyncio._safe_loop()),
        settings=settings,
        **kwargs
    )

    ebuild_phase.start()
    ebuild_phase.wait()
    return ebuild_phase.returncode


def _doebuild_path(settings, eapi=None):
    """
    Generate the PATH variable.
    """

    # Note: PORTAGE_BIN_PATH may differ from the global constant
    # when portage is reinstalling itself.
    portage_bin_path = [settings["PORTAGE_BIN_PATH"]]
    if portage_bin_path[0] != portage.const.PORTAGE_BIN_PATH:
        # Add a fallback path for restarting failed builds (bug 547086)
        portage_bin_path.append(portage.const.PORTAGE_BIN_PATH)
    prerootpath = [x for x in settings.get("PREROOTPATH", "").split(":") if x]
    rootpath = [x for x in settings.get("ROOTPATH", "").split(":") if x]
    rootpath_set = frozenset(rootpath)
    overrides = [
        x for x in settings.get("__PORTAGE_TEST_PATH_OVERRIDE", "").split(":") if x
    ]

    prefixes = []
    # settings["EPREFIX"] should take priority over portage.const.EPREFIX
    if portage.const.EPREFIX != settings["EPREFIX"] and settings["ROOT"] == os.sep:
        prefixes.append(settings["EPREFIX"])
    prefixes.append(portage.const.EPREFIX)

    path = overrides

    if "xattr" in settings.features:
        for x in portage_bin_path:
            path.append(os.path.join(x, "ebuild-helpers", "xattr"))

    if (
        uid != 0
        and "unprivileged" in settings.features
        and "fakeroot" not in settings.features
    ):
        for x in portage_bin_path:
            path.append(os.path.join(x, "ebuild-helpers", "unprivileged"))

    if settings.get("USERLAND", "GNU") != "GNU":
        for x in portage_bin_path:
            path.append(os.path.join(x, "ebuild-helpers", "bsd"))

    for x in portage_bin_path:
        path.append(os.path.join(x, "ebuild-helpers"))
    path.extend(prerootpath)

    for prefix in prefixes:
        prefix = prefix if prefix else "/"
        for x in (
            "usr/local/sbin",
            "usr/local/bin",
            "usr/sbin",
            "usr/bin",
            "sbin",
            "bin",
        ):
            # Respect order defined in ROOTPATH
            x_abs = os.path.join(prefix, x)
            if x_abs not in rootpath_set:
                path.append(x_abs)

    path.extend(rootpath)
    settings["PATH"] = ":".join(path)


def doebuild_environment(
    myebuild, mydo, myroot=None, settings=None, debug=False, use_cache=None, db=None
):
    """
    Create and store environment variable in the config instance
    that's passed in as the "settings" parameter. This will raise
    UnsupportedAPIException if the given ebuild has an unsupported
    EAPI. All EAPI dependent code comes last, so that essential
    variables like PORTAGE_BUILDDIR are still initialized even in
    cases when UnsupportedAPIException needs to be raised, which
    can be useful when uninstalling a package that has corrupt
    EAPI metadata.
    The myroot and use_cache parameters are unused.
    """

    if settings is None:
        raise TypeError("settings argument is required")

    if db is None:
        raise TypeError("db argument is required")

    mysettings = settings
    mydbapi = db
    ebuild_path = os.path.abspath(myebuild)
    pkg_dir = os.path.dirname(ebuild_path)
    mytree = os.path.dirname(os.path.dirname(pkg_dir))
    mypv = os.path.basename(ebuild_path)[:-7]
    mysplit = _pkgsplit(mypv, eapi=mysettings.configdict["pkg"].get("EAPI"))
    if mysplit is None:
        raise IncorrectParameter(_("Invalid ebuild path: '%s'") % myebuild)

    if (
        mysettings.mycpv is not None
        and mysettings.configdict["pkg"].get("PF") == mypv
        and "CATEGORY" in mysettings.configdict["pkg"]
    ):
        # Assume that PF is enough to assume that we've got
        # the correct CATEGORY, though this is not really
        # a solid assumption since it's possible (though
        # unlikely) that two packages in different
        # categories have the same PF. Callers should call
        # setcpv or create a clean clone of a locked config
        # instance in order to ensure that this assumption
        # does not fail like in bug #408817.
        cat = mysettings.configdict["pkg"]["CATEGORY"]
        mycpv = mysettings.mycpv
    elif os.path.basename(pkg_dir) in (mysplit[0], mypv):
        # portdbapi or vardbapi
        cat = os.path.basename(os.path.dirname(pkg_dir))
        mycpv = cat + "/" + mypv
    else:
        raise AssertionError("unable to determine CATEGORY")

    # Make a backup of PORTAGE_TMPDIR prior to calling config.reset()
    # so that the caller can override it.
    tmpdir = mysettings["PORTAGE_TMPDIR"]

    if mydo == "depend":
        if mycpv != mysettings.mycpv:
            # Don't pass in mydbapi here since the resulting aux_get
            # call would lead to infinite 'depend' phase recursion.
            mysettings.setcpv(mycpv)
    else:
        # If EAPI isn't in configdict["pkg"], it means that setcpv()
        # hasn't been called with the mydb argument, so we have to
        # call it here (portage code always calls setcpv properly,
        # but api consumers might not).
        if mycpv != mysettings.mycpv or "EAPI" not in mysettings.configdict["pkg"]:
            # Reload env.d variables and reset any previous settings.
            mysettings.reload()
            mysettings.reset()
            mysettings.setcpv(mycpv, mydb=mydbapi)

    # config.reset() might have reverted a change made by the caller,
    # so restore it to its original value. Sandbox needs canonical
    # paths, so realpath it.
    mysettings["PORTAGE_TMPDIR"] = os.path.realpath(tmpdir)

    mysettings.pop("EBUILD_PHASE", None)  # remove from backupenv
    mysettings["EBUILD_PHASE"] = mydo

    # Set requested Python interpreter for Portage helpers.
    mysettings["PORTAGE_PYTHON"] = portage._python_interpreter

    # This is used by assert_sigpipe_ok() that's used by the ebuild
    # unpack() helper. SIGPIPE is typically 13, but its better not
    # to assume that.
    mysettings["PORTAGE_SIGPIPE_STATUS"] = str(128 + signal.SIGPIPE)

    # We are disabling user-specific bashrc files.
    mysettings["BASH_ENV"] = INVALID_ENV_FILE

    if debug:  # Otherwise it overrides emerge's settings.
        # We have no other way to set debug... debug can't be passed in
        # due to how it's coded... Don't overwrite this so we can use it.
        mysettings["PORTAGE_DEBUG"] = "1"

    mysettings["EBUILD"] = ebuild_path
    mysettings["O"] = pkg_dir
    mysettings.configdict["pkg"]["CATEGORY"] = cat
    mysettings["PF"] = mypv

    if hasattr(mydbapi, "repositories"):
        repo = mydbapi.repositories.get_repo_for_location(mytree)
        mysettings["PORTDIR"] = repo.eclass_db.porttrees[0]
        mysettings["PORTAGE_ECLASS_LOCATIONS"] = repo.eclass_db.eclass_locations_string
        mysettings.configdict["pkg"]["PORTAGE_REPO_NAME"] = repo.name

    mysettings["PORTDIR"] = os.path.realpath(mysettings["PORTDIR"])
    mysettings.pop("PORTDIR_OVERLAY", None)
    mysettings["DISTDIR"] = os.path.realpath(mysettings["DISTDIR"])
    mysettings["RPMDIR"] = os.path.realpath(mysettings["RPMDIR"])

    mysettings["ECLASSDIR"] = mysettings["PORTDIR"] + "/eclass"

    mysettings["PORTAGE_BASHRC_FILES"] = "\n".join(mysettings._pbashrc)

    mysettings["P"] = mysplit[0] + "-" + mysplit[1]
    mysettings["PN"] = mysplit[0]
    mysettings["PV"] = mysplit[1]
    mysettings["PR"] = mysplit[2]

    if noiselimit < 0:
        mysettings["PORTAGE_QUIET"] = "1"

    if mysplit[2] == "r0":
        mysettings["PVR"] = mysplit[1]
    else:
        mysettings["PVR"] = mysplit[1] + "-" + mysplit[2]

    # All temporary directories should be subdirectories of
    # $PORTAGE_TMPDIR/portage, since it's common for /tmp and /var/tmp
    # to be mounted with the "noexec" option (see bug #346899).
    mysettings["BUILD_PREFIX"] = mysettings["PORTAGE_TMPDIR"] + "/portage"
    mysettings["PKG_TMPDIR"] = mysettings["BUILD_PREFIX"] + "/._unmerge_"

    # Package {pre,post}inst and {pre,post}rm may overlap, so they must have separate
    # locations in order to prevent interference.
    if mydo in ("unmerge", "prerm", "postrm", "cleanrm"):
        mysettings["PORTAGE_BUILDDIR"] = os.path.join(
            mysettings["PKG_TMPDIR"], mysettings["CATEGORY"], mysettings["PF"]
        )
    else:
        mysettings["PORTAGE_BUILDDIR"] = os.path.join(
            mysettings["BUILD_PREFIX"], mysettings["CATEGORY"], mysettings["PF"]
        )

    mysettings["HOME"] = os.path.join(mysettings["PORTAGE_BUILDDIR"], "homedir")
    mysettings["WORKDIR"] = os.path.join(mysettings["PORTAGE_BUILDDIR"], "work")
    mysettings["D"] = os.path.join(mysettings["PORTAGE_BUILDDIR"], "image") + os.sep
    mysettings["T"] = os.path.join(mysettings["PORTAGE_BUILDDIR"], "temp")
    mysettings["SANDBOX_LOG"] = os.path.join(mysettings["T"], "sandbox.log")
    mysettings["FILESDIR"] = os.path.join(settings["PORTAGE_BUILDDIR"], "files")

    # Prefix forward compatability
    eprefix_lstrip = mysettings["EPREFIX"].lstrip(os.sep)
    mysettings["ED"] = (
        os.path.join(mysettings["D"], eprefix_lstrip).rstrip(os.sep) + os.sep
    )

    mysettings["PORTAGE_BASHRC"] = os.path.join(
        mysettings["PORTAGE_CONFIGROOT"], EBUILD_SH_ENV_FILE
    )
    mysettings["PM_EBUILD_HOOK_DIR"] = os.path.join(
        mysettings["PORTAGE_CONFIGROOT"], EBUILD_SH_ENV_DIR
    )

    # Allow color.map to control colors associated with einfo, ewarn, etc...
    mysettings["PORTAGE_COLORMAP"] = colormap()

    if "COLUMNS" not in mysettings:
        # Set COLUMNS, in order to prevent unnecessary stty calls
        # inside the set_colors function of isolated-functions.sh.
        # We cache the result in os.environ, in order to avoid
        # multiple stty calls in cases when get_term_size() falls
        # back to stty due to a missing or broken curses module.
        columns = os.environ.get("COLUMNS")
        if columns is None:
            rows, columns = portage.output.get_term_size()
            if columns < 1:
                # Force a sane value for COLUMNS, so that tools
                # like ls don't complain (see bug #394091).
                columns = 80
            columns = str(columns)
            os.environ["COLUMNS"] = columns
        mysettings["COLUMNS"] = columns

    # EAPI is always known here, even for the "depend" phase, because
    # EbuildMetadataPhase gets it from _parse_eapi_ebuild_head().
    eapi = mysettings.configdict["pkg"]["EAPI"]
    _doebuild_path(mysettings, eapi=eapi)

    # All EAPI dependent code comes last, so that essential variables like
    # PATH and PORTAGE_BUILDDIR are still initialized even in cases when
    # UnsupportedAPIException needs to be raised, which can be useful
    # when uninstalling a package that has corrupt EAPI metadata.
    if not eapi_is_supported(eapi):
        raise UnsupportedAPIException(mycpv, eapi)

    if (
        eapi_exports_REPOSITORY(eapi)
        and "PORTAGE_REPO_NAME" in mysettings.configdict["pkg"]
    ):
        mysettings.configdict["pkg"]["REPOSITORY"] = mysettings.configdict["pkg"][
            "PORTAGE_REPO_NAME"
        ]

    if mydo != "depend":
        if hasattr(mydbapi, "getFetchMap") and (
            "A" not in mysettings.configdict["pkg"]
            or "AA" not in mysettings.configdict["pkg"]
        ):
            src_uri = mysettings.configdict["pkg"].get("SRC_URI")
            if src_uri is None:
                (src_uri,) = mydbapi.aux_get(
                    mysettings.mycpv, ["SRC_URI"], mytree=mytree
                )
            metadata = {
                "EAPI": eapi,
                "SRC_URI": src_uri,
            }
            use = frozenset(mysettings["PORTAGE_USE"].split())
            try:
                uri_map = _parse_uri_map(mysettings.mycpv, metadata, use=use)
            except InvalidDependString:
                mysettings.configdict["pkg"]["A"] = ""
            else:
                mysettings.configdict["pkg"]["A"] = " ".join(uri_map)

            try:
                uri_map = _parse_uri_map(mysettings.mycpv, metadata)
            except InvalidDependString:
                mysettings.configdict["pkg"]["AA"] = ""
            else:
                mysettings.configdict["pkg"]["AA"] = " ".join(uri_map)

        ccache = "ccache" in mysettings.features
        distcc = "distcc" in mysettings.features
        icecream = "icecream" in mysettings.features

        if ccache or distcc or icecream:
            libdir = None
            default_abi = mysettings.get("DEFAULT_ABI")
            if default_abi:
                libdir = mysettings.get("LIBDIR_" + default_abi)
            if not libdir:
                libdir = "lib"

            # The installation locations use to vary between versions...
            # Safer to look them up rather than assuming
            possible_libexecdirs = (libdir, "lib", "libexec")
            masquerades = []
            if distcc:
                masquerades.append(("distcc", "distcc"))
            if icecream:
                masquerades.append(("icecream", "icecc"))
            if ccache:
                masquerades.append(("ccache", "ccache"))

            for feature, m in masquerades:
                for l in possible_libexecdirs:
                    p = os.path.join(os.sep, eprefix_lstrip, "usr", l, m, "bin")
                    if os.path.isdir(p):
                        mysettings["PATH"] = p + ":" + mysettings["PATH"]
                        break
                else:
                    writemsg(
                        (
                            "Warning: %s requested but no masquerade dir "
                            "can be found in /usr/lib*/%s/bin\n"
                        )
                        % (m, m)
                    )
                    mysettings.features.remove(feature)

        if "MAKEOPTS" not in mysettings:
            nproc = get_cpu_count()
            if nproc:
                mysettings["MAKEOPTS"] = "-j%d" % (nproc)

        if not eapi_exports_KV(eapi):
            # Discard KV for EAPIs that don't support it. Cached KV is restored
            # from the backupenv whenever config.reset() is called.
            mysettings.pop("KV", None)
        elif "KV" not in mysettings and mydo in (
            "compile",
            "config",
            "configure",
            "info",
            "install",
            "nofetch",
            "postinst",
            "postrm",
            "preinst",
            "prepare",
            "prerm",
            "setup",
            "test",
            "unpack",
        ):
            mykv, err1 = ExtractKernelVersion(
                os.path.join(mysettings["EROOT"], "usr/src/linux")
            )
            if mykv:
                # Regular source tree
                mysettings["KV"] = mykv
            else:
                mysettings["KV"] = ""
            mysettings.backup_changes("KV")

        binpkg_compression = mysettings.get("BINPKG_COMPRESS", "bzip2")
        try:
            compression = _compressors[binpkg_compression]
        except KeyError as e:
            if binpkg_compression:
                writemsg(
                    "Warning: Invalid or unsupported compression method: %s\n"
                    % e.args[0]
                )
            else:
                # Empty BINPKG_COMPRESS disables compression.
                mysettings["PORTAGE_COMPRESSION_COMMAND"] = "cat"
        else:
            try:
                compression_binary = shlex_split(
                    varexpand(compression["compress"], mydict=settings)
                )[0]
            except IndexError as e:
                writemsg(
                    "Warning: Invalid or unsupported compression method: %s\n"
                    % e.args[0]
                )
            else:
                if find_binary(compression_binary) is None:
                    missing_package = compression["package"]
                    writemsg(
                        "Warning: File compression unsupported %s. Missing package: %s\n"
                        % (binpkg_compression, missing_package)
                    )
                else:
                    cmd = [
                        varexpand(x, mydict=settings)
                        for x in shlex_split(compression["compress"])
                    ]
                    # Filter empty elements
                    cmd = [x for x in cmd if x != ""]
                    mysettings["PORTAGE_COMPRESSION_COMMAND"] = " ".join(cmd)


_doebuild_manifest_cache = None
_doebuild_broken_ebuilds = set()
_doebuild_broken_manifests = set()
_doebuild_commands_without_builddir = (
    "clean",
    "cleanrm",
    "depend",
    "digest",
    "fetch",
    "fetchall",
    "help",
    "manifest",
)


def doebuild(
    myebuild,
    mydo,
    _unused=DeprecationWarning,
    settings=None,
    debug=0,
    listonly=0,
    fetchonly=0,
    cleanup=0,
    use_cache=1,
    fetchall=0,
    tree=None,
    mydbapi=None,
    vartree=None,
    prev_mtimes=None,
    fd_pipes=None,
    returnpid=False,
):
    """
    Wrapper function that invokes specific ebuild phases through the spawning
    of ebuild.sh

    @param myebuild: name of the ebuild to invoke the phase on (CPV)
    @type myebuild: String
    @param mydo: Phase to run
    @type mydo: String
    @param _unused: Deprecated (use settings["ROOT"] instead)
    @type _unused: String
    @param settings: Portage Configuration
    @type settings: instance of portage.config
    @param debug: Turns on various debug information (eg, debug for spawn)
    @type debug: Boolean
    @param listonly: Used to wrap fetch(); passed such that fetch only lists files required.
    @type listonly: Boolean
    @param fetchonly: Used to wrap fetch(); passed such that files are only fetched (no other actions)
    @type fetchonly: Boolean
    @param cleanup: Passed to prepare_build_dirs (TODO: what does it do?)
    @type cleanup: Boolean
    @param use_cache: Enables the cache
    @type use_cache: Boolean
    @param fetchall: Used to wrap fetch(), fetches all URIs (even ones invalid due to USE conditionals)
    @type fetchall: Boolean
    @param tree: Which tree to use ('vartree','porttree','bintree', etc..), defaults to 'porttree'
    @type tree: String
    @param mydbapi: a dbapi instance to pass to various functions; this should be a portdbapi instance.
    @type mydbapi: portdbapi instance
    @param vartree: A instance of vartree; used for aux_get calls, defaults to db[myroot]['vartree']
    @type vartree: vartree instance
    @param prev_mtimes: A dict of { filename:mtime } keys used by merge() to do config_protection
    @type prev_mtimes: dictionary
    @param fd_pipes: A dict of mapping for pipes, { '0': stdin, '1': stdout }
            for example.
    @type fd_pipes: Dictionary
    @param returnpid: Return a list of process IDs for a successful spawn, or
            an integer value if spawn is unsuccessful. NOTE: This requires the
            caller clean up all returned PIDs.
    @type returnpid: Boolean
    @rtype: Boolean
    @return:
    1. 0 for success
    2. 1 for error

    Most errors have an accompanying error message.

    listonly and fetchonly are only really necessary for operations involving 'fetch'
    prev_mtimes are only necessary for merge operations.
    Other variables may not be strictly required, many have defaults that are set inside of doebuild.

    """

    if settings is None:
        raise TypeError("settings parameter is required")
    mysettings = settings
    myroot = settings["EROOT"]

    if _unused is not DeprecationWarning:
        warnings.warn(
            "The third parameter of the "
            "portage.doebuild() is deprecated. Instead "
            "settings['EROOT'] is used.",
            DeprecationWarning,
            stacklevel=2,
        )

    if not tree:
        writemsg("Warning: tree not specified to doebuild\n")
        tree = "porttree"

    # chunked out deps for each phase, so that ebuild binary can use it
    # to collapse targets down.
    actionmap_deps = {
        "pretend": [],
        "setup": ["pretend"],
        "unpack": ["setup"],
        "prepare": ["unpack"],
        "configure": ["prepare"],
        "compile": ["configure"],
        "test": ["compile"],
        "install": ["test"],
        "instprep": ["install"],
        "rpm": ["install"],
        "package": ["install"],
        "merge": ["install"],
    }

    if mydbapi is None:
        mydbapi = portage.db[myroot][tree].dbapi

    if vartree is None and mydo in ("merge", "qmerge", "unmerge"):
        vartree = portage.db[myroot]["vartree"]

    features = mysettings.features

    clean_phases = ("clean", "cleanrm")
    validcommands = [
        "help",
        "clean",
        "prerm",
        "postrm",
        "cleanrm",
        "preinst",
        "postinst",
        "config",
        "info",
        "setup",
        "depend",
        "pretend",
        "fetch",
        "fetchall",
        "digest",
        "unpack",
        "prepare",
        "configure",
        "compile",
        "test",
        "install",
        "instprep",
        "rpm",
        "qmerge",
        "merge",
        "package",
        "unmerge",
        "manifest",
        "nofetch",
    ]

    if mydo not in validcommands:
        validcommands.sort()
        writemsg(
            "!!! doebuild: '%s' is not one of the following valid commands:" % mydo,
            noiselevel=-1,
        )
        for vcount in range(len(validcommands)):
            if vcount % 6 == 0:
                writemsg("\n!!! ", noiselevel=-1)
            writemsg(validcommands[vcount].ljust(11), noiselevel=-1)
        writemsg("\n", noiselevel=-1)
        return 1

    if returnpid and mydo != "depend":
        # This case is not supported, since it bypasses the EbuildPhase class
        # which implements important functionality (including post phase hooks
        # and IPC for things like best/has_version and die).
        warnings.warn(
            "portage.doebuild() called "
            "with returnpid parameter enabled. This usage will "
            "not be supported in the future.",
            DeprecationWarning,
            stacklevel=2,
        )

    if mydo == "fetchall":
        fetchall = 1
        mydo = "fetch"

    if mydo not in clean_phases and not os.path.exists(myebuild):
        writemsg(
            "!!! doebuild: %s not found for %s\n" % (myebuild, mydo), noiselevel=-1
        )
        return 1

    global _doebuild_manifest_cache
    pkgdir = os.path.dirname(myebuild)
    manifest_path = os.path.join(pkgdir, "Manifest")
    if tree == "porttree":
        repo_config = mysettings.repositories.get_repo_for_location(
            os.path.dirname(os.path.dirname(pkgdir))
        )
    else:
        repo_config = None

    mf = None
    if (
        "strict" in features
        and "digest" not in features
        and tree == "porttree"
        and not repo_config.thin_manifest
        and mydo not in ("digest", "manifest", "help")
        and not portage._doebuild_manifest_exempt_depend
        and not (
            repo_config.allow_missing_manifest and not os.path.exists(manifest_path)
        )
    ):
        # Always verify the ebuild checksums before executing it.
        global _doebuild_broken_ebuilds

        if myebuild in _doebuild_broken_ebuilds:
            return 1

        # Avoid checking the same Manifest several times in a row during a
        # regen with an empty cache.
        if (
            _doebuild_manifest_cache is None
            or _doebuild_manifest_cache.getFullname() != manifest_path
        ):
            _doebuild_manifest_cache = None
            if not os.path.exists(manifest_path):
                out = portage.output.EOutput()
                out.eerror(_("Manifest not found for '%s'") % (myebuild,))
                _doebuild_broken_ebuilds.add(myebuild)
                return 1
            mf = repo_config.load_manifest(pkgdir, mysettings["DISTDIR"])

        else:
            mf = _doebuild_manifest_cache

        try:
            mf.checkFileHashes("EBUILD", os.path.basename(myebuild))
        except KeyError:
            if not (
                mf.allow_missing
                and os.path.basename(myebuild) not in mf.fhashdict["EBUILD"]
            ):
                out = portage.output.EOutput()
                out.eerror(_("Missing digest for '%s'") % (myebuild,))
                _doebuild_broken_ebuilds.add(myebuild)
                return 1
        except FileNotFound:
            out = portage.output.EOutput()
            out.eerror(
                _("A file listed in the Manifest " "could not be found: '%s'")
                % (myebuild,)
            )
            _doebuild_broken_ebuilds.add(myebuild)
            return 1
        except DigestException as e:
            out = portage.output.EOutput()
            out.eerror(_("Digest verification failed:"))
            out.eerror("%s" % e.value[0])
            out.eerror(_("Reason: %s") % e.value[1])
            out.eerror(_("Got: %s") % e.value[2])
            out.eerror(_("Expected: %s") % e.value[3])
            _doebuild_broken_ebuilds.add(myebuild)
            return 1

        if mf.getFullname() in _doebuild_broken_manifests:
            return 1

        if mf is not _doebuild_manifest_cache and not mf.allow_missing:

            # Make sure that all of the ebuilds are
            # actually listed in the Manifest.
            for f in os.listdir(pkgdir):
                pf = None
                if f[-7:] == ".ebuild":
                    pf = f[:-7]
                if pf is not None and not mf.hasFile("EBUILD", f):
                    f = os.path.join(pkgdir, f)
                    if f not in _doebuild_broken_ebuilds:
                        out = portage.output.EOutput()
                        out.eerror(
                            _("A file is not listed in the " "Manifest: '%s'") % (f,)
                        )
                    _doebuild_broken_manifests.add(manifest_path)
                    return 1

        # We cache it only after all above checks succeed.
        _doebuild_manifest_cache = mf

    logfile = None
    builddir_lock = None
    tmpdir = None
    tmpdir_orig = None

    try:
        if mydo in ("digest", "manifest", "help"):
            # Temporarily exempt the depend phase from manifest checks, in case
            # aux_get calls trigger cache generation.
            portage._doebuild_manifest_exempt_depend += 1

        # If we don't need much space and we don't need a constant location,
        # we can temporarily override PORTAGE_TMPDIR with a random temp dir
        # so that there's no need for locking and it can be used even if the
        # user isn't in the portage group.
        if not returnpid and mydo in ("info",):
            tmpdir = tempfile.mkdtemp()
            tmpdir_orig = mysettings["PORTAGE_TMPDIR"]
            mysettings["PORTAGE_TMPDIR"] = tmpdir

        doebuild_environment(
            myebuild, mydo, myroot, mysettings, debug, use_cache, mydbapi
        )

        if mydo in clean_phases:
            builddir_lock = None
            if not returnpid and "PORTAGE_BUILDDIR_LOCKED" not in mysettings:
                builddir_lock = EbuildBuildDir(
                    scheduler=asyncio._safe_loop(), settings=mysettings
                )
                builddir_lock.scheduler.run_until_complete(builddir_lock.async_lock())
            try:
                return _spawn_phase(
                    mydo, mysettings, fd_pipes=fd_pipes, returnpid=returnpid
                )
            finally:
                if builddir_lock is not None:
                    builddir_lock.scheduler.run_until_complete(
                        builddir_lock.async_unlock()
                    )

        # get possible slot information from the deps file
        if mydo == "depend":
            if not returnpid:
                raise TypeError("returnpid must be True for depend phase")
            return _spawn_phase(
                mydo, mysettings, fd_pipes=fd_pipes, returnpid=returnpid
            )

        if mydo == "nofetch":

            if returnpid:
                writemsg(
                    "!!! doebuild: %s\n"
                    % _("returnpid is not supported for phase '%s'\n" % mydo),
                    noiselevel=-1,
                )

            return spawn_nofetch(
                mydbapi, myebuild, settings=mysettings, fd_pipes=fd_pipes
            )

        if tree == "porttree":

            if not returnpid:
                # Validate dependency metadata here to ensure that ebuilds with
                # invalid data are never installed via the ebuild command. Skip
                # this when returnpid is True (assume the caller handled it).
                rval = _validate_deps(mysettings, myroot, mydo, mydbapi)
                if rval != os.EX_OK:
                    return rval

        else:
            # FEATURES=noauto only makes sense for porttree, and we don't want
            # it to trigger redundant sourcing of the ebuild for API consumers
            # that are using binary packages
            if "noauto" in mysettings.features:
                mysettings.features.discard("noauto")

        # If we are not using a private temp dir, then check access
        # to the global temp dir.
        if tmpdir is None and mydo not in _doebuild_commands_without_builddir:
            rval = _check_temp_dir(mysettings)
            if rval != os.EX_OK:
                return rval

        if mydo == "unmerge":
            if returnpid:
                writemsg(
                    "!!! doebuild: %s\n"
                    % _("returnpid is not supported for phase '%s'\n" % mydo),
                    noiselevel=-1,
                )
            return unmerge(
                mysettings["CATEGORY"],
                mysettings["PF"],
                myroot,
                mysettings,
                vartree=vartree,
            )

        phases_to_run = set()
        if returnpid or "noauto" in mysettings.features or mydo not in actionmap_deps:
            phases_to_run.add(mydo)
        else:
            phase_stack = [mydo]
            while phase_stack:
                x = phase_stack.pop()
                if x in phases_to_run:
                    continue
                phases_to_run.add(x)
                phase_stack.extend(actionmap_deps.get(x, []))
            del phase_stack

        alist = set(mysettings.configdict["pkg"].get("A", "").split())

        unpacked = False
        if tree != "porttree" or mydo in _doebuild_commands_without_builddir:
            pass
        elif "unpack" not in phases_to_run:
            unpacked = os.path.exists(
                os.path.join(mysettings["PORTAGE_BUILDDIR"], ".unpacked")
            )
        else:
            try:
                workdir_st = os.stat(mysettings["WORKDIR"])
            except OSError:
                pass
            else:
                newstuff = False
                if not os.path.exists(
                    os.path.join(mysettings["PORTAGE_BUILDDIR"], ".unpacked")
                ):
                    writemsg_stdout(
                        _(">>> Not marked as unpacked; recreating WORKDIR...\n")
                    )
                    newstuff = True
                else:
                    for x in alist:
                        writemsg_stdout(">>> Checking %s's mtime...\n" % x)
                        try:
                            x_st = os.stat(os.path.join(mysettings["DISTDIR"], x))
                        except OSError:
                            # file deleted
                            x_st = None

                        if x_st is not None and x_st.st_mtime > workdir_st.st_mtime:
                            writemsg_stdout(
                                _(
                                    ">>> Timestamp of "
                                    "%s has changed; recreating WORKDIR...\n"
                                )
                                % x
                            )
                            newstuff = True
                            break

                if newstuff:
                    if (
                        builddir_lock is None
                        and "PORTAGE_BUILDDIR_LOCKED" not in mysettings
                    ):
                        builddir_lock = EbuildBuildDir(
                            scheduler=asyncio._safe_loop(), settings=mysettings
                        )
                        builddir_lock.scheduler.run_until_complete(
                            builddir_lock.async_lock()
                        )
                    try:
                        _spawn_phase("clean", mysettings)
                    finally:
                        if builddir_lock is not None:
                            builddir_lock.scheduler.run_until_complete(
                                builddir_lock.async_unlock()
                            )
                            builddir_lock = None
                else:
                    writemsg_stdout(_(">>> WORKDIR is up-to-date, keeping...\n"))
                    unpacked = True

        # Build directory creation isn't required for any of these.
        # In the fetch phase, the directory is needed only for RESTRICT=fetch
        # in order to satisfy the sane $PWD requirement (from bug #239560)
        # when pkg_nofetch is spawned.
        have_build_dirs = False
        if mydo not in ("digest", "fetch", "help", "manifest"):
            if not returnpid and "PORTAGE_BUILDDIR_LOCKED" not in mysettings:
                builddir_lock = EbuildBuildDir(
                    scheduler=asyncio._safe_loop(), settings=mysettings
                )
                builddir_lock.scheduler.run_until_complete(builddir_lock.async_lock())
            mystatus = prepare_build_dirs(myroot, mysettings, cleanup)
            if mystatus:
                return mystatus
            have_build_dirs = True

            # emerge handles logging externally
            if not returnpid:
                # PORTAGE_LOG_FILE is set by the
                # above prepare_build_dirs() call.
                logfile = mysettings.get("PORTAGE_LOG_FILE")

        if have_build_dirs:
            rval = _prepare_env_file(mysettings)
            if rval != os.EX_OK:
                return rval

        if (
            eapi_exports_merge_type(mysettings["EAPI"])
            and "MERGE_TYPE" not in mysettings.configdict["pkg"]
        ):
            if tree == "porttree":
                mysettings.configdict["pkg"]["MERGE_TYPE"] = "source"
            elif tree == "bintree":
                mysettings.configdict["pkg"]["MERGE_TYPE"] = "binary"

        if tree == "porttree":
            mysettings.configdict["pkg"]["EMERGE_FROM"] = "ebuild"
        elif tree == "bintree":
            mysettings.configdict["pkg"]["EMERGE_FROM"] = "binary"

        # NOTE: It's not possible to set REPLACED_BY_VERSION for prerm
        #       and postrm here, since we don't necessarily know what
        #       versions are being installed. This could be a problem
        #       for API consumers if they don't use dblink.treewalk()
        #       to execute prerm and postrm.
        if eapi_exports_replace_vars(mysettings["EAPI"]) and (
            mydo in ("postinst", "preinst", "pretend", "setup")
            or (
                "noauto" not in features
                and not returnpid
                and (mydo in actionmap_deps or mydo in ("merge", "package", "qmerge"))
            )
        ):
            if not vartree:
                writemsg(
                    "Warning: vartree not given to doebuild. "
                    + "Cannot set REPLACING_VERSIONS in pkg_{pretend,setup}\n"
                )
            else:
                vardb = vartree.dbapi
                cpv = mysettings.mycpv
                cpv_slot = "%s%s%s" % (cpv.cp, portage.dep._slot_separator, cpv.slot)
                mysettings["REPLACING_VERSIONS"] = " ".join(
                    set(
                        portage.versions.cpv_getversion(match)
                        for match in vardb.match(cpv_slot) + vardb.match("=" + cpv)
                    )
                )

        # if any of these are being called, handle them -- running them out of
        # the sandbox -- and stop now.
        if mydo in (
            "config",
            "help",
            "info",
            "postinst",
            "preinst",
            "pretend",
            "postrm",
            "prerm",
        ):
            if mydo in ("preinst", "postinst"):
                env_file = os.path.join(
                    os.path.dirname(mysettings["EBUILD"]), "environment.bz2"
                )
                if os.path.isfile(env_file):
                    mysettings["PORTAGE_UPDATE_ENV"] = env_file
            try:
                return _spawn_phase(
                    mydo,
                    mysettings,
                    fd_pipes=fd_pipes,
                    logfile=logfile,
                    returnpid=returnpid,
                )
            finally:
                mysettings.pop("PORTAGE_UPDATE_ENV", None)

        mycpv = "/".join((mysettings["CATEGORY"], mysettings["PF"]))

        # Only try and fetch the files if we are going to need them ...
        # otherwise, if user has FEATURES=noauto and they run `ebuild clean
        # unpack compile install`, we will try and fetch 4 times :/
        need_distfiles = (
            tree == "porttree"
            and not unpacked
            and (
                mydo in ("fetch", "unpack")
                or mydo not in ("digest", "manifest")
                and "noauto" not in features
            )
        )
        if need_distfiles:

            src_uri = mysettings.configdict["pkg"].get("SRC_URI")
            if src_uri is None:
                (src_uri,) = mydbapi.aux_get(
                    mysettings.mycpv,
                    ["SRC_URI"],
                    mytree=os.path.dirname(os.path.dirname(os.path.dirname(myebuild))),
                )
            metadata = {
                "EAPI": mysettings["EAPI"],
                "SRC_URI": src_uri,
            }
            use = frozenset(mysettings["PORTAGE_USE"].split())
            try:
                alist = _parse_uri_map(mysettings.mycpv, metadata, use=use)
                aalist = _parse_uri_map(mysettings.mycpv, metadata)
            except InvalidDependString as e:
                writemsg("!!! %s\n" % str(e), noiselevel=-1)
                writemsg(_("!!! Invalid SRC_URI for '%s'.\n") % mycpv, noiselevel=-1)
                del e
                return 1

            if "mirror" in features or fetchall:
                fetchme = aalist
            else:
                fetchme = alist

            dist_digests = None
            if mf is not None:
                dist_digests = mf.getTypeDigests("DIST")

            def _fetch_subprocess(fetchme, mysettings, listonly, dist_digests):
                # For userfetch, drop privileges for the entire fetch call, in
                # order to handle DISTDIR on NFS with root_squash for bug 601252.
                if _want_userfetch(mysettings):
                    _drop_privs_userfetch(mysettings)

                return fetch(
                    fetchme,
                    mysettings,
                    listonly=listonly,
                    fetchonly=fetchonly,
                    allow_missing_digests=False,
                    digests=dist_digests,
                )

            loop = asyncio._safe_loop()
            if loop.is_running():
                # Called by EbuildFetchonly for emerge --pretend --fetchonly.
                success = fetch(
                    fetchme,
                    mysettings,
                    listonly=listonly,
                    fetchonly=fetchonly,
                    allow_missing_digests=False,
                    digests=dist_digests,
                )
            else:
                success = loop.run_until_complete(
                    loop.run_in_executor(
                        ForkExecutor(loop=loop),
                        _fetch_subprocess,
                        fetchme,
                        mysettings,
                        listonly,
                        dist_digests,
                    )
                )
            if not success:
                # Since listonly mode is called by emerge --pretend in an
                # asynchronous context, spawn_nofetch would trigger event loop
                # recursion here, therefore delegate execution of pkg_nofetch
                # to the caller (bug 657360).
                if not listonly:
                    spawn_nofetch(
                        mydbapi, myebuild, settings=mysettings, fd_pipes=fd_pipes
                    )
                return 1

        if need_distfiles:
            # Files are already checked inside fetch(),
            # so do not check them again.
            checkme = []
        elif unpacked:
            # The unpack phase is marked as complete, so it
            # would be wasteful to check distfiles again.
            checkme = []
        else:
            checkme = alist

        if mydo == "fetch" and listonly:
            return 0

        try:
            if mydo == "manifest":
                mf = None
                _doebuild_manifest_cache = None
                return not digestgen(mysettings=mysettings, myportdb=mydbapi)
            if mydo == "digest":
                mf = None
                _doebuild_manifest_cache = None
                return not digestgen(mysettings=mysettings, myportdb=mydbapi)
            if "digest" in mysettings.features:
                mf = None
                _doebuild_manifest_cache = None
                digestgen(mysettings=mysettings, myportdb=mydbapi)
        except PermissionDenied as e:
            writemsg(_("!!! Permission Denied: %s\n") % (e,), noiselevel=-1)
            if mydo in ("digest", "manifest"):
                return 1

        if mydo == "fetch":
            # Return after digestgen for FEATURES=digest support.
            # Return before digestcheck, since fetch() already
            # checked any relevant digests.
            return 0

        # See above comment about fetching only when needed
        if tree == "porttree" and not digestcheck(
            checkme, mysettings, "strict" in features, mf=mf
        ):
            return 1

        # remove PORTAGE_ACTUAL_DISTDIR once cvs/svn is supported via SRC_URI
        if tree == "porttree" and (
            (mydo != "setup" and "noauto" not in features)
            or mydo in ("install", "unpack")
        ):
            _prepare_fake_distdir(mysettings, alist)

        # initial dep checks complete; time to process main commands
        actionmap = _spawn_actionmap(mysettings)

        # merge the deps in so we have again a 'full' actionmap
        # be glad when this can die.
        for x in actionmap:
            if len(actionmap_deps.get(x, [])):
                actionmap[x]["dep"] = " ".join(actionmap_deps[x])

        regular_actionmap_phase = mydo in actionmap

        if regular_actionmap_phase:
            bintree = None
            if mydo == "package":
                # Make sure the package directory exists before executing
                # this phase. This can raise PermissionDenied if
                # the current user doesn't have write access to $PKGDIR.
                if hasattr(portage, "db"):
                    bintree = portage.db[mysettings["EROOT"]]["bintree"]
                    binpkg_tmpfile_dir = os.path.join(
                        bintree.pkgdir, mysettings["CATEGORY"]
                    )
                    bintree._ensure_dir(binpkg_tmpfile_dir)
                    with tempfile.NamedTemporaryFile(
                        prefix=mysettings["PF"],
                        suffix=".tbz2." + str(portage.getpid()),
                        dir=binpkg_tmpfile_dir,
                        delete=False,
                    ) as binpkg_tmpfile:
                        mysettings["PORTAGE_BINPKG_TMPFILE"] = binpkg_tmpfile.name
                else:
                    parent_dir = os.path.join(
                        mysettings["PKGDIR"], mysettings["CATEGORY"]
                    )
                    portage.util.ensure_dirs(parent_dir)
                    if not os.access(parent_dir, os.W_OK):
                        raise PermissionDenied("access('%s', os.W_OK)" % parent_dir)
            retval = spawnebuild(
                mydo,
                actionmap,
                mysettings,
                debug,
                logfile=logfile,
                fd_pipes=fd_pipes,
                returnpid=returnpid,
            )

            if returnpid and isinstance(retval, list):
                return retval

            if retval == os.EX_OK:
                if mydo == "package" and bintree is not None:
                    pkg = bintree.inject(
                        mysettings.mycpv, filename=mysettings["PORTAGE_BINPKG_TMPFILE"]
                    )
                    if pkg is not None:
                        infoloc = os.path.join(
                            mysettings["PORTAGE_BUILDDIR"], "build-info"
                        )
                        build_info = {
                            "BINPKGMD5": "%s\n" % pkg._metadata["MD5"],
                        }
                        if pkg.build_id is not None:
                            build_info["BUILD_ID"] = "%s\n" % pkg.build_id
                        for k, v in build_info.items():
                            with io.open(
                                _unicode_encode(
                                    os.path.join(infoloc, k),
                                    encoding=_encodings["fs"],
                                    errors="strict",
                                ),
                                mode="w",
                                encoding=_encodings["repo.content"],
                                errors="strict",
                            ) as f:
                                f.write(v)
            else:
                if "PORTAGE_BINPKG_TMPFILE" in mysettings:
                    try:
                        os.unlink(mysettings["PORTAGE_BINPKG_TMPFILE"])
                    except OSError:
                        pass

        elif returnpid:
            writemsg(
                "!!! doebuild: %s\n"
                % _("returnpid is not supported for phase '%s'\n" % mydo),
                noiselevel=-1,
            )

        if regular_actionmap_phase:
            # handled above
            pass
        elif mydo == "qmerge":
            # check to ensure install was run.  this *only* pops up when users
            # forget it and are using ebuild
            if not os.path.exists(
                os.path.join(mysettings["PORTAGE_BUILDDIR"], ".installed")
            ):
                writemsg(
                    _("!!! mydo=qmerge, but the install phase has not been run\n"),
                    noiselevel=-1,
                )
                return 1
            # qmerge is a special phase that implies noclean.
            if "noclean" not in mysettings.features:
                mysettings.features.add("noclean")
            _handle_self_update(mysettings, vartree.dbapi)
            # qmerge is specifically not supposed to do a runtime dep check
            retval = merge(
                mysettings["CATEGORY"],
                mysettings["PF"],
                mysettings["D"],
                os.path.join(mysettings["PORTAGE_BUILDDIR"], "build-info"),
                myroot,
                mysettings,
                myebuild=mysettings["EBUILD"],
                mytree=tree,
                mydbapi=mydbapi,
                vartree=vartree,
                prev_mtimes=prev_mtimes,
                fd_pipes=fd_pipes,
            )
        elif mydo == "merge":
            retval = spawnebuild(
                "install",
                actionmap,
                mysettings,
                debug,
                alwaysdep=1,
                logfile=logfile,
                fd_pipes=fd_pipes,
                returnpid=returnpid,
            )
            if retval != os.EX_OK:
                # The merge phase handles this already.  Callers don't know how
                # far this function got, so we have to call elog_process() here
                # so that it's only called once.
                elog_process(mysettings.mycpv, mysettings)
            if retval == os.EX_OK:
                _handle_self_update(mysettings, vartree.dbapi)
                retval = merge(
                    mysettings["CATEGORY"],
                    mysettings["PF"],
                    mysettings["D"],
                    os.path.join(mysettings["PORTAGE_BUILDDIR"], "build-info"),
                    myroot,
                    mysettings,
                    myebuild=mysettings["EBUILD"],
                    mytree=tree,
                    mydbapi=mydbapi,
                    vartree=vartree,
                    prev_mtimes=prev_mtimes,
                    fd_pipes=fd_pipes,
                )

        else:
            writemsg_stdout(_("!!! Unknown mydo: %s\n") % mydo, noiselevel=-1)
            return 1

        return retval

    finally:

        if builddir_lock is not None:
            builddir_lock.scheduler.run_until_complete(builddir_lock.async_unlock())
        if tmpdir:
            mysettings["PORTAGE_TMPDIR"] = tmpdir_orig
            shutil.rmtree(tmpdir)

        mysettings.pop("REPLACING_VERSIONS", None)

        if logfile and not returnpid:
            try:
                if os.stat(logfile).st_size == 0:
                    os.unlink(logfile)
            except OSError:
                pass

        if mydo in ("digest", "manifest", "help"):
            # If necessary, depend phase has been triggered by aux_get calls
            # and the exemption is no longer needed.
            portage._doebuild_manifest_exempt_depend -= 1


def _check_temp_dir(settings):
    if "PORTAGE_TMPDIR" not in settings or not os.path.isdir(
        settings["PORTAGE_TMPDIR"]
    ):
        writemsg(
            _(
                "The directory specified in your "
                "PORTAGE_TMPDIR variable, '%s',\n"
                "does not exist.  Please create this directory or "
                "correct your PORTAGE_TMPDIR setting.\n"
            )
            % settings.get("PORTAGE_TMPDIR", ""),
            noiselevel=-1,
        )
        return 1

    # as some people use a separate PORTAGE_TMPDIR mount
    # we prefer that as the checks below would otherwise be pointless
    # for those people.
    checkdir = first_existing(os.path.join(settings["PORTAGE_TMPDIR"], "portage"))

    if not os.access(checkdir, os.W_OK):
        writemsg(
            _(
                "%s is not writable.\n"
                "Likely cause is that you've mounted it as readonly.\n"
            )
            % checkdir,
            noiselevel=-1,
        )
        return 1

    with tempfile.NamedTemporaryFile(prefix="exectest-", dir=checkdir) as fd:
        os.chmod(fd.name, 0o755)
        if not os.access(fd.name, os.X_OK):
            writemsg(
                _(
                    "Can not execute files in %s\n"
                    "Likely cause is that you've mounted it with one of the\n"
                    "following mount options: 'noexec', 'user', 'users'\n\n"
                    "Please make sure that portage can execute files in this directory.\n"
                )
                % checkdir,
                noiselevel=-1,
            )
            return 1

    return os.EX_OK


def _prepare_env_file(settings):
    """
    Extract environment.bz2 if it exists, but only if the destination
    environment file doesn't already exist. There are lots of possible
    states when doebuild() calls this function, and we want to avoid
    clobbering an existing environment file.
    """

    env_extractor = BinpkgEnvExtractor(
        background=False, scheduler=asyncio._safe_loop(), settings=settings
    )

    if env_extractor.dest_env_exists():
        # There are lots of possible states when doebuild()
        # calls this function, and we want to avoid
        # clobbering an existing environment file.
        return os.EX_OK

    if not env_extractor.saved_env_exists():
        # If the environment.bz2 doesn't exist, then ebuild.sh will
        # source the ebuild as a fallback.
        return os.EX_OK

    env_extractor.start()
    env_extractor.wait()
    return env_extractor.returncode


def _spawn_actionmap(settings):
    features = settings.features
    restrict = settings["PORTAGE_RESTRICT"].split()
    nosandbox = (
        ("userpriv" in features)
        and ("usersandbox" not in features)
        and "userpriv" not in restrict
        and "nouserpriv" not in restrict
    )

    if not portage.process.sandbox_capable:
        nosandbox = True

    sesandbox = settings.selinux_enabled() and "sesandbox" in features

    droppriv = "userpriv" in features and "userpriv" not in restrict and secpass >= 2

    fakeroot = "fakeroot" in features

    portage_bin_path = settings["PORTAGE_BIN_PATH"]
    ebuild_sh_binary = os.path.join(
        portage_bin_path, os.path.basename(EBUILD_SH_BINARY)
    )
    misc_sh_binary = os.path.join(portage_bin_path, os.path.basename(MISC_SH_BINARY))
    ebuild_sh = _shell_quote(ebuild_sh_binary) + " %s"
    misc_sh = _shell_quote(misc_sh_binary) + " __dyn_%s"

    # args are for the to spawn function
    actionmap = {
        "pretend": {
            "cmd": ebuild_sh,
            "args": {"droppriv": 0, "free": 1, "sesandbox": 0, "fakeroot": 0},
        },
        "setup": {
            "cmd": ebuild_sh,
            "args": {"droppriv": 0, "free": 1, "sesandbox": 0, "fakeroot": 0},
        },
        "unpack": {
            "cmd": ebuild_sh,
            "args": {
                "droppriv": droppriv,
                "free": 0,
                "sesandbox": sesandbox,
                "fakeroot": 0,
            },
        },
        "prepare": {
            "cmd": ebuild_sh,
            "args": {
                "droppriv": droppriv,
                "free": 0,
                "sesandbox": sesandbox,
                "fakeroot": 0,
            },
        },
        "configure": {
            "cmd": ebuild_sh,
            "args": {
                "droppriv": droppriv,
                "free": nosandbox,
                "sesandbox": sesandbox,
                "fakeroot": 0,
            },
        },
        "compile": {
            "cmd": ebuild_sh,
            "args": {
                "droppriv": droppriv,
                "free": nosandbox,
                "sesandbox": sesandbox,
                "fakeroot": 0,
            },
        },
        "test": {
            "cmd": ebuild_sh,
            "args": {
                "droppriv": droppriv,
                "free": nosandbox,
                "sesandbox": sesandbox,
                "fakeroot": 0,
            },
        },
        "install": {
            "cmd": ebuild_sh,
            "args": {
                "droppriv": 0,
                "free": 0,
                "sesandbox": sesandbox,
                "fakeroot": fakeroot,
            },
        },
        "instprep": {
            "cmd": misc_sh,
            "args": {
                "droppriv": 0,
                "free": 0,
                "sesandbox": sesandbox,
                "fakeroot": fakeroot,
            },
        },
        "rpm": {
            "cmd": misc_sh,
            "args": {"droppriv": 0, "free": 0, "sesandbox": 0, "fakeroot": fakeroot},
        },
        "package": {
            "cmd": misc_sh,
            "args": {"droppriv": 0, "free": 0, "sesandbox": 0, "fakeroot": fakeroot},
        },
    }

    return actionmap


def _validate_deps(mysettings, myroot, mydo, mydbapi):

    invalid_dep_exempt_phases = set(["clean", "cleanrm", "help", "prerm", "postrm"])
    all_keys = set(Package.metadata_keys)
    all_keys.add("SRC_URI")
    all_keys = tuple(all_keys)
    metadata = mysettings.configdict["pkg"]
    if all(k in metadata for k in ("PORTAGE_REPO_NAME", "SRC_URI")):
        metadata = dict(
            ((k, metadata[k]) for k in all_keys if k in metadata),
            repository=metadata["PORTAGE_REPO_NAME"],
        )
    else:
        metadata = dict(
            zip(
                all_keys,
                mydbapi.aux_get(
                    mysettings.mycpv,
                    all_keys,
                    myrepo=mysettings.get("PORTAGE_REPO_NAME"),
                ),
            )
        )

    class FakeTree:
        def __init__(self, mydb):
            self.dbapi = mydb

    root_config = RootConfig(mysettings, {"porttree": FakeTree(mydbapi)}, None)

    pkg = Package(
        built=False,
        cpv=mysettings.mycpv,
        metadata=metadata,
        root_config=root_config,
        type_name="ebuild",
    )

    msgs = []
    if pkg.invalid:
        for k, v in pkg.invalid.items():
            for msg in v:
                msgs.append("  %s\n" % (msg,))

    if msgs:
        portage.util.writemsg_level(
            _("Error(s) in metadata for '%s':\n") % (mysettings.mycpv,),
            level=logging.ERROR,
            noiselevel=-1,
        )
        for x in msgs:
            portage.util.writemsg_level(x, level=logging.ERROR, noiselevel=-1)
        if mydo not in invalid_dep_exempt_phases:
            return 1

    if (
        not pkg.built
        and mydo not in ("digest", "help", "manifest")
        and pkg._metadata["REQUIRED_USE"]
        and eapi_has_required_use(pkg.eapi)
    ):
        result = check_required_use(
            pkg._metadata["REQUIRED_USE"],
            pkg.use.enabled,
            pkg.iuse.is_valid_flag,
            eapi=pkg.eapi,
        )
        if not result:
            reduced_noise = result.tounicode()
            writemsg(
                "\n  %s\n"
                % _(
                    "The following REQUIRED_USE flag" + " constraints are unsatisfied:"
                ),
                noiselevel=-1,
            )
            writemsg("    %s\n" % reduced_noise, noiselevel=-1)
            normalized_required_use = " ".join(pkg._metadata["REQUIRED_USE"].split())
            if reduced_noise != normalized_required_use:
                writemsg(
                    "\n  %s\n"
                    % _(
                        "The above constraints "
                        + "are a subset of the following complete expression:"
                    ),
                    noiselevel=-1,
                )
                writemsg(
                    "    %s\n" % human_readable_required_use(normalized_required_use),
                    noiselevel=-1,
                )
            writemsg("\n", noiselevel=-1)
            return 1

    return os.EX_OK


# XXX This would be to replace getstatusoutput completely.
# XXX Issue: cannot block execution. Deadlock condition.


def spawn(
    mystring,
    mysettings,
    debug=False,
    free=False,
    droppriv=False,
    sesandbox=False,
    fakeroot=False,
    networked=True,
    ipc=True,
    mountns=False,
    pidns=False,
    **keywords
):
    """
    Spawn a subprocess with extra portage-specific options.
    Optiosn include:

    Sandbox: Sandbox means the spawned process will be limited in its ability t
    read and write files (normally this means it is restricted to ${D}/)
    SElinux Sandbox: Enables sandboxing on SElinux
    Reduced Privileges: Drops privilages such that the process runs as portage:portage
    instead of as root.

    Notes: os.system cannot be used because it messes with signal handling.  Instead we
    use the portage.process spawn* family of functions.

    This function waits for the process to terminate.

    @param mystring: Command to run
    @type mystring: String
    @param mysettings: Either a Dict of Key,Value pairs or an instance of portage.config
    @type mysettings: Dictionary or config instance
    @param debug: Ignored
    @type debug: Boolean
    @param free: Enable sandboxing for this process
    @type free: Boolean
    @param droppriv: Drop to portage:portage when running this command
    @type droppriv: Boolean
    @param sesandbox: Enable SELinux Sandboxing (toggles a context switch)
    @type sesandbox: Boolean
    @param fakeroot: Run this command with faked root privileges
    @type fakeroot: Boolean
    @param networked: Run this command with networking access enabled
    @type networked: Boolean
    @param ipc: Run this command with host IPC access enabled
    @type ipc: Boolean
    @param mountns: Run this command inside mount namespace
    @type mountns: Boolean
    @param pidns: Run this command in isolated PID namespace
    @type pidns: Boolean
    @param keywords: Extra options encoded as a dict, to be passed to spawn
    @type keywords: Dictionary
    @rtype: Integer
    @return:
    1. The return code of the spawned process.
    """

    check_config_instance(mysettings)

    fd_pipes = keywords.get("fd_pipes")
    if fd_pipes is None:
        fd_pipes = {
            0: portage._get_stdin().fileno(),
            1: sys.__stdout__.fileno(),
            2: sys.__stderr__.fileno(),
        }
    # In some cases the above print statements don't flush stdout, so
    # it needs to be flushed before allowing a child process to use it
    # so that output always shows in the correct order.
    stdout_filenos = (sys.__stdout__.fileno(), sys.__stderr__.fileno())
    for fd in fd_pipes.values():
        if fd in stdout_filenos:
            sys.__stdout__.flush()
            sys.__stderr__.flush()
            break

    features = mysettings.features

    # Use Linux namespaces if available
    if uid == 0 and platform.system() == "Linux":
        keywords["unshare_net"] = not networked
        keywords["unshare_ipc"] = not ipc
        keywords["unshare_mount"] = mountns
        keywords["unshare_pid"] = pidns

        if (
            not networked
            and mysettings.get("EBUILD_PHASE") != "nofetch"
            and ("network-sandbox-proxy" in features or "distcc" in features)
        ):
            # Provide a SOCKS5-over-UNIX-socket proxy to escape sandbox
            # Don't do this for pkg_nofetch, since the spawn_nofetch
            # function creates a private PORTAGE_TMPDIR.
            try:
                proxy = get_socks5_proxy(mysettings)
            except NotImplementedError:
                pass
            else:
                mysettings["PORTAGE_SOCKS5_PROXY"] = proxy
                mysettings["DISTCC_SOCKS_PROXY"] = proxy

    # TODO: Enable fakeroot to be used together with droppriv.  The
    # fake ownership/permissions will have to be converted to real
    # permissions in the merge phase.
    fakeroot = fakeroot and uid != 0 and portage.process.fakeroot_capable
    portage_build_uid = os.getuid()
    portage_build_gid = os.getgid()
    logname = None
    if uid == 0 and portage_uid and portage_gid and hasattr(os, "setgroups"):
        if droppriv:
            logname = portage.data._portage_username
            keywords.update(
                {
                    "uid": portage_uid,
                    "gid": portage_gid,
                    "groups": userpriv_groups,
                    "umask": 0o22,
                }
            )

            # Adjust pty ownership so that subprocesses
            # can directly access /dev/fd/{1,2}.
            stdout_fd = fd_pipes.get(1)
            if stdout_fd is not None:
                try:
                    subprocess_tty = _os.ttyname(stdout_fd)
                except OSError:
                    pass
                else:
                    try:
                        parent_tty = _os.ttyname(sys.__stdout__.fileno())
                    except OSError:
                        parent_tty = None

                    if subprocess_tty != parent_tty:
                        _os.chown(subprocess_tty, int(portage_uid), int(portage_gid))

        if (
            "userpriv" in features
            and "userpriv" not in mysettings["PORTAGE_RESTRICT"].split()
            and secpass >= 2
        ):
            # Since Python 3.4, getpwuid and getgrgid
            # require int type (no proxies).
            portage_build_uid = int(portage_uid)
            portage_build_gid = int(portage_gid)

    if "PORTAGE_BUILD_USER" not in mysettings:
        user = None
        try:
            user = pwd.getpwuid(portage_build_uid).pw_name
        except KeyError:
            if portage_build_uid == 0:
                user = "root"
            elif portage_build_uid == portage_uid:
                user = portage.data._portage_username
        if user is not None:
            mysettings["PORTAGE_BUILD_USER"] = user

    if "PORTAGE_BUILD_GROUP" not in mysettings:
        group = None
        try:
            group = grp.getgrgid(portage_build_gid).gr_name
        except KeyError:
            if portage_build_gid == 0:
                group = "root"
            elif portage_build_gid == portage_gid:
                group = portage.data._portage_grpname
        if group is not None:
            mysettings["PORTAGE_BUILD_GROUP"] = group

    if not free:
        free = (droppriv and "usersandbox" not in features) or (
            not droppriv
            and "sandbox" not in features
            and "usersandbox" not in features
            and not fakeroot
        )

    if not free and not (fakeroot or portage.process.sandbox_capable):
        free = True

    if mysettings.mycpv is not None:
        keywords["opt_name"] = "[%s]" % mysettings.mycpv
    else:
        keywords["opt_name"] = "[%s/%s]" % (
            mysettings.get("CATEGORY", ""),
            mysettings.get("PF", ""),
        )

    if free or "SANDBOX_ACTIVE" in os.environ:
        keywords["opt_name"] += " bash"
        spawn_func = portage.process.spawn_bash
    elif fakeroot:
        keywords["opt_name"] += " fakeroot"
        keywords["fakeroot_state"] = os.path.join(mysettings["T"], "fakeroot.state")
        spawn_func = portage.process.spawn_fakeroot
    else:
        keywords["opt_name"] += " sandbox"
        spawn_func = portage.process.spawn_sandbox

    if sesandbox:
        spawn_func = selinux.spawn_wrapper(spawn_func, mysettings["PORTAGE_SANDBOX_T"])

    logname_backup = None
    if logname is not None:
        logname_backup = mysettings.configdict["env"].get("LOGNAME")
        mysettings.configdict["env"]["LOGNAME"] = logname

    try:
        if keywords.get("returnpid"):
            return spawn_func(mystring, env=mysettings.environ(), **keywords)

        proc = EbuildSpawnProcess(
            background=False,
            args=mystring,
            scheduler=SchedulerInterface(asyncio._safe_loop()),
            spawn_func=spawn_func,
            settings=mysettings,
            **keywords
        )

        proc.start()
        proc.wait()

        return proc.returncode

    finally:
        if logname is None:
            pass
        elif logname_backup is None:
            mysettings.configdict["env"].pop("LOGNAME", None)
        else:
            mysettings.configdict["env"]["LOGNAME"] = logname_backup


# parse actionmap to spawn ebuild with the appropriate args


def spawnebuild(
    mydo,
    actionmap,
    mysettings,
    debug,
    alwaysdep=0,
    logfile=None,
    fd_pipes=None,
    returnpid=False,
):

    if returnpid:
        warnings.warn(
            "portage.spawnebuild() called "
            "with returnpid parameter enabled. This usage will "
            "not be supported in the future.",
            DeprecationWarning,
            stacklevel=2,
        )

    if not returnpid and (alwaysdep or "noauto" not in mysettings.features):
        # process dependency first
        if "dep" in actionmap[mydo]:
            retval = spawnebuild(
                actionmap[mydo]["dep"],
                actionmap,
                mysettings,
                debug,
                alwaysdep=alwaysdep,
                logfile=logfile,
                fd_pipes=fd_pipes,
                returnpid=returnpid,
            )
            if retval:
                return retval

    eapi = mysettings["EAPI"]

    if mydo in ("configure", "prepare") and not eapi_has_src_prepare_and_src_configure(
        eapi
    ):
        return os.EX_OK

    if mydo == "pretend" and not eapi_has_pkg_pretend(eapi):
        return os.EX_OK

    if not (mydo == "install" and "noauto" in mysettings.features):
        check_file = os.path.join(
            mysettings["PORTAGE_BUILDDIR"], ".%sed" % mydo.rstrip("e")
        )
        if os.path.exists(check_file):
            writemsg_stdout(
                _(
                    ">>> It appears that "
                    "'%(action)s' has already executed for '%(pkg)s'; skipping.\n"
                )
                % {"action": mydo, "pkg": mysettings["PF"]}
            )
            writemsg_stdout(
                _(">>> Remove '%(file)s' to force %(action)s.\n")
                % {"file": check_file, "action": mydo}
            )
            return os.EX_OK

    return _spawn_phase(
        mydo,
        mysettings,
        actionmap=actionmap,
        logfile=logfile,
        fd_pipes=fd_pipes,
        returnpid=returnpid,
    )


_post_phase_cmds = {
    "install": ["install_qa_check", "install_symlink_html_docs", "install_hooks"],
    "preinst": (
        (
            # Since SELinux does not allow LD_PRELOAD across domain transitions,
            # disable the LD_PRELOAD sandbox for preinst_selinux_labels.
            {
                "ld_preload_sandbox": False,
                "selinux_only": True,
            },
            [
                "preinst_selinux_labels",
            ],
        ),
        (
            {},
            [
                "preinst_sfperms",
                "preinst_suid_scan",
                "preinst_qa_check",
            ],
        ),
    ),
    "postinst": ["postinst_qa_check"],
}


def _post_phase_userpriv_perms(mysettings):
    if "userpriv" in mysettings.features and secpass >= 2:
        """Privileged phases may have left files that need to be made
        writable to a less privileged user."""
        for path in (mysettings["HOME"], mysettings["T"]):
            apply_recursive_permissions(
                path,
                uid=portage_uid,
                gid=portage_gid,
                dirmode=0o700,
                dirmask=0,
                filemode=0o600,
                filemask=0,
            )


def _post_phase_emptydir_cleanup(mysettings):
    empty_dir = os.path.join(mysettings["PORTAGE_BUILDDIR"], "empty")
    shutil.rmtree(empty_dir, ignore_errors=True)


def _check_build_log(mysettings, out=None):
    """
    Search the content of $PORTAGE_LOG_FILE if it exists
    and generate the following QA Notices when appropriate:

      * Automake "maintainer mode"
      * command not found
      * Unrecognized configure options
    """
    logfile = mysettings.get("PORTAGE_LOG_FILE")
    if logfile is None:
        return
    try:
        f = open(
            _unicode_encode(logfile, encoding=_encodings["fs"], errors="strict"),
            mode="rb",
        )
    except EnvironmentError:
        return

    f_real = None
    if logfile.endswith(".gz"):
        f_real = f
        f = gzip.GzipFile(filename="", mode="rb", fileobj=f)

    am_maintainer_mode = []
    bash_command_not_found = []
    bash_command_not_found_re = re.compile(
        r"(.*): line (\d*): (.*): command not found$"
    )
    command_not_found_exclude_re = re.compile(r"/configure: line ")
    helper_missing_file = []
    helper_missing_file_re = re.compile(r"^!!! (do|new).*: .* does not exist$")

    configure_opts_warn = []
    configure_opts_warn_re = re.compile(
        r"^configure: WARNING: [Uu]nrecognized options: (.*)"
    )

    qa_configure_opts = ""
    try:
        with io.open(
            _unicode_encode(
                os.path.join(
                    mysettings["PORTAGE_BUILDDIR"], "build-info", "QA_CONFIGURE_OPTIONS"
                ),
                encoding=_encodings["fs"],
                errors="strict",
            ),
            mode="r",
            encoding=_encodings["repo.content"],
            errors="replace",
        ) as qa_configure_opts_f:
            qa_configure_opts = qa_configure_opts_f.read()
    except IOError as e:
        if e.errno not in (errno.ENOENT, errno.ESTALE):
            raise

    qa_configure_opts = qa_configure_opts.split()
    if qa_configure_opts:
        if len(qa_configure_opts) > 1:
            qa_configure_opts = "|".join("(%s)" % x for x in qa_configure_opts)
            qa_configure_opts = "^(%s)$" % qa_configure_opts
        else:
            qa_configure_opts = "^%s$" % qa_configure_opts[0]
        qa_configure_opts = re.compile(qa_configure_opts)

    qa_am_maintainer_mode = []
    try:
        with io.open(
            _unicode_encode(
                os.path.join(
                    mysettings["PORTAGE_BUILDDIR"],
                    "build-info",
                    "QA_AM_MAINTAINER_MODE",
                ),
                encoding=_encodings["fs"],
                errors="strict",
            ),
            mode="r",
            encoding=_encodings["repo.content"],
            errors="replace",
        ) as qa_am_maintainer_mode_f:
            qa_am_maintainer_mode = [
                x for x in qa_am_maintainer_mode_f.read().splitlines() if x
            ]
    except IOError as e:
        if e.errno not in (errno.ENOENT, errno.ESTALE):
            raise

    if qa_am_maintainer_mode:
        if len(qa_am_maintainer_mode) > 1:
            qa_am_maintainer_mode = "|".join("(%s)" % x for x in qa_am_maintainer_mode)
            qa_am_maintainer_mode = "^(%s)$" % qa_am_maintainer_mode
        else:
            qa_am_maintainer_mode = "^%s$" % qa_am_maintainer_mode[0]
        qa_am_maintainer_mode = re.compile(qa_am_maintainer_mode)

    # Exclude output from dev-libs/yaz-3.0.47 which looks like this:
    #
    # Configuration:
    #  Automake:                   ${SHELL} /var/tmp/portage/dev-libs/yaz-3.0.47/work/yaz-3.0.47/config/missing --run automake-1.10
    am_maintainer_mode_re = re.compile(r"/missing --run ")
    am_maintainer_mode_exclude_re = re.compile(
        r"(/missing --run (autoheader|autotest|help2man|makeinfo)|^\s*Automake:\s)"
    )

    make_jobserver_re = re.compile(r"g?make\[\d+\]: warning: jobserver unavailable:")
    make_jobserver = []

    # we deduplicate these since they is repeated for every setup.py call
    setuptools_warn = set()
    setuptools_warn_re = re.compile(r".*\/setuptools\/.*: .*Warning: (.*)")
    # skip useless version normalization warnings
    setuptools_warn_ignore_re = [
        re.compile(r"Normalizing .*"),
        re.compile(r"setup.py install is deprecated"),
    ]

    def _eerror(lines):
        for line in lines:
            eerror(line, phase="install", key=mysettings.mycpv, out=out)

    try:
        for line in f:
            line = _unicode_decode(line)
            if (
                am_maintainer_mode_re.search(line) is not None
                and am_maintainer_mode_exclude_re.search(line) is None
                and (
                    not qa_am_maintainer_mode
                    or qa_am_maintainer_mode.search(line) is None
                )
            ):
                am_maintainer_mode.append(line.rstrip("\n"))

            if (
                bash_command_not_found_re.match(line) is not None
                and command_not_found_exclude_re.search(line) is None
            ):
                bash_command_not_found.append(line.rstrip("\n"))

            if helper_missing_file_re.match(line) is not None:
                helper_missing_file.append(line.rstrip("\n"))

            m = configure_opts_warn_re.match(line)
            if m is not None:
                for x in m.group(1).split(", "):
                    if not qa_configure_opts or qa_configure_opts.match(x) is None:
                        configure_opts_warn.append(x)

            if make_jobserver_re.match(line) is not None:
                make_jobserver.append(line.rstrip("\n"))

            m = setuptools_warn_re.match(line)
            if m is not None:
                warn_text = m.group(1)
                for ign in setuptools_warn_ignore_re:
                    if ign.match(warn_text):
                        break
                else:
                    setuptools_warn.add(warn_text)

    except (EOFError, zlib.error) as e:
        _eerror(
            [
                "portage encountered a zlib error: '%s'" % (e,),
                "while reading the log file: '%s'" % logfile,
            ]
        )
    finally:
        f.close()

    def _eqawarn(lines):
        for line in lines:
            eqawarn(line, phase="install", key=mysettings.mycpv, out=out)

    wrap_width = 70

    if am_maintainer_mode:
        msg = [_('QA Notice: Automake "maintainer mode" detected:')]
        msg.append("")
        msg.extend("\t" + line for line in am_maintainer_mode)
        msg.append("")
        msg.extend(
            wrap(
                _(
                    "If you patch Makefile.am, "
                    "configure.in,  or configure.ac then you "
                    "should use autotools.eclass and "
                    "eautomake or eautoreconf. Exceptions "
                    "are limited to system packages "
                    "for which it is impossible to run "
                    "autotools during stage building. "
                    "See https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Autotools_failures"
                    " for more information."
                ),
                wrap_width,
            )
        )
        _eqawarn(msg)

    if bash_command_not_found:
        msg = [_("QA Notice: command not found:")]
        msg.append("")
        msg.extend("\t" + line for line in bash_command_not_found)
        _eqawarn(msg)

    if helper_missing_file:
        msg = [_("QA Notice: file does not exist:")]
        msg.append("")
        msg.extend("\t" + line[4:] for line in helper_missing_file)
        _eqawarn(msg)

    if configure_opts_warn:
        msg = [_("QA Notice: Unrecognized configure options:")]
        msg.append("")
        msg.extend("\t%s" % x for x in configure_opts_warn)
        _eqawarn(msg)

    if make_jobserver:
        msg = [_("QA Notice: make jobserver unavailable:")]
        msg.append("")
        msg.extend("\t" + line for line in make_jobserver)
        _eqawarn(msg)

    if setuptools_warn:
        msg = [_("QA Notice: setuptools warnings detected:")]
        msg.append("")
        msg.extend("\t" + line for line in sorted(setuptools_warn))
        _eqawarn(msg)

    f.close()
    if f_real is not None:
        f_real.close()


def _post_src_install_write_metadata(settings):
    """
    It's possible that the ebuild has changed the
    CHOST variable, so revert it to the initial
    setting. Also, revert IUSE in case it's corrupted
    due to local environment settings like in bug #386829.
    """

    eapi_attrs = _get_eapi_attrs(settings.configdict["pkg"]["EAPI"])

    build_info_dir = os.path.join(settings["PORTAGE_BUILDDIR"], "build-info")

    metadata_keys = ["IUSE"]
    if eapi_attrs.iuse_effective:
        metadata_keys.append("IUSE_EFFECTIVE")

    for k in metadata_keys:
        v = settings.configdict["pkg"].get(k)
        if v is not None:
            write_atomic(os.path.join(build_info_dir, k), v + "\n")

    for k in ("CHOST",):
        v = settings.get(k)
        if v is not None:
            write_atomic(os.path.join(build_info_dir, k), v + "\n")

    with io.open(
        _unicode_encode(
            os.path.join(build_info_dir, "BUILD_TIME"),
            encoding=_encodings["fs"],
            errors="strict",
        ),
        mode="w",
        encoding=_encodings["repo.content"],
        errors="strict",
    ) as f:
        f.write("%.0f\n" % (time.time(),))

    use = frozenset(settings["PORTAGE_USE"].split())
    for k in _vdb_use_conditional_keys:
        v = settings.configdict["pkg"].get(k)
        filename = os.path.join(build_info_dir, k)
        if v is None:
            try:
                os.unlink(filename)
            except OSError:
                pass
            continue

        if k.endswith("DEPEND"):
            if eapi_attrs.slot_operator:
                continue
            token_class = Atom
        else:
            token_class = None

        v = use_reduce(v, uselist=use, token_class=token_class)
        v = paren_enclose(v)
        if not v:
            try:
                os.unlink(filename)
            except OSError:
                pass
            continue
        with io.open(
            _unicode_encode(
                os.path.join(build_info_dir, k),
                encoding=_encodings["fs"],
                errors="strict",
            ),
            mode="w",
            encoding=_encodings["repo.content"],
            errors="strict",
        ) as f:
            f.write("%s\n" % v)

    if eapi_attrs.slot_operator:
        deps = evaluate_slot_operator_equal_deps(settings, use, QueryCommand.get_db())
        for k, v in deps.items():
            filename = os.path.join(build_info_dir, k)
            if not v:
                try:
                    os.unlink(filename)
                except OSError:
                    pass
                continue
            with io.open(
                _unicode_encode(
                    os.path.join(build_info_dir, k),
                    encoding=_encodings["fs"],
                    errors="strict",
                ),
                mode="w",
                encoding=_encodings["repo.content"],
                errors="strict",
            ) as f:
                f.write("%s\n" % v)


def _preinst_bsdflags(mysettings):
    if bsd_chflags:
        # Save all the file flags for restoration later.
        os.system(
            "mtree -c -p %s -k flags > %s"
            % (
                _shell_quote(mysettings["D"]),
                _shell_quote(os.path.join(mysettings["T"], "bsdflags.mtree")),
            )
        )

        # Remove all the file flags to avoid EPERM errors.
        os.system(
            "chflags -R noschg,nouchg,nosappnd,nouappnd %s"
            % (_shell_quote(mysettings["D"]),)
        )
        os.system(
            "chflags -R nosunlnk,nouunlnk %s 2>/dev/null"
            % (_shell_quote(mysettings["D"]),)
        )


def _postinst_bsdflags(mysettings):
    if bsd_chflags:
        # Restore all of the flags saved above.
        os.system(
            "mtree -e -p %s -U -k flags < %s > /dev/null"
            % (
                _shell_quote(mysettings["ROOT"]),
                _shell_quote(os.path.join(mysettings["T"], "bsdflags.mtree")),
            )
        )


def _post_src_install_uid_fix(mysettings, out):
    """
    Files in $D with user and group bits that match the "portage"
    user or group are automatically mapped to PORTAGE_INST_UID and
    PORTAGE_INST_GID if necessary. The chown system call may clear
    S_ISUID and S_ISGID bits, so those bits are restored if
    necessary.
    """

    os = _os_merge

    inst_uid = int(mysettings["PORTAGE_INST_UID"])
    inst_gid = int(mysettings["PORTAGE_INST_GID"])

    _preinst_bsdflags(mysettings)

    destdir = mysettings["D"]
    ed_len = len(mysettings["ED"])
    unicode_errors = []
    desktop_file_validate = (
        portage.process.find_binary("desktop-file-validate") is not None
    )
    xdg_dirs = mysettings.get("XDG_DATA_DIRS", "/usr/share").split(":")
    xdg_dirs = tuple(os.path.join(i, "applications") + os.sep for i in xdg_dirs if i)

    qa_desktop_file = ""
    try:
        with io.open(
            _unicode_encode(
                os.path.join(
                    mysettings["PORTAGE_BUILDDIR"], "build-info", "QA_DESKTOP_FILE"
                ),
                encoding=_encodings["fs"],
                errors="strict",
            ),
            mode="r",
            encoding=_encodings["repo.content"],
            errors="replace",
        ) as f:
            qa_desktop_file = f.read()
    except IOError as e:
        if e.errno not in (errno.ENOENT, errno.ESTALE):
            raise

    qa_desktop_file = qa_desktop_file.split()
    if qa_desktop_file:
        if len(qa_desktop_file) > 1:
            qa_desktop_file = "|".join("(%s)" % x for x in qa_desktop_file)
            qa_desktop_file = "^(%s)$" % qa_desktop_file
        else:
            qa_desktop_file = "^%s$" % qa_desktop_file[0]
        qa_desktop_file = re.compile(qa_desktop_file)

    while True:

        unicode_error = False
        size = 0
        counted_inodes = set()
        fixlafiles_announced = False
        fixlafiles = "fixlafiles" in mysettings.features
        desktopfile_errors = []

        for parent, dirs, files in os.walk(destdir):
            try:
                parent = _unicode_decode(
                    parent, encoding=_encodings["merge"], errors="strict"
                )
            except UnicodeDecodeError:
                new_parent = _unicode_decode(
                    parent, encoding=_encodings["merge"], errors="replace"
                )
                new_parent = _unicode_encode(
                    new_parent, encoding="ascii", errors="backslashreplace"
                )
                new_parent = _unicode_decode(
                    new_parent, encoding=_encodings["merge"], errors="replace"
                )
                os.rename(parent, new_parent)
                unicode_error = True
                unicode_errors.append(new_parent[ed_len:])
                break

            for fname in chain(dirs, files):
                try:
                    fname = _unicode_decode(
                        fname, encoding=_encodings["merge"], errors="strict"
                    )
                except UnicodeDecodeError:
                    fpath = _os.path.join(parent.encode(_encodings["merge"]), fname)
                    new_fname = _unicode_decode(
                        fname, encoding=_encodings["merge"], errors="replace"
                    )
                    new_fname = _unicode_encode(
                        new_fname, encoding="ascii", errors="backslashreplace"
                    )
                    new_fname = _unicode_decode(
                        new_fname, encoding=_encodings["merge"], errors="replace"
                    )
                    new_fpath = os.path.join(parent, new_fname)
                    os.rename(fpath, new_fpath)
                    unicode_error = True
                    unicode_errors.append(new_fpath[ed_len:])
                    fname = new_fname
                    fpath = new_fpath
                else:
                    fpath = os.path.join(parent, fname)

                fpath_relative = fpath[ed_len - 1 :]
                if (
                    desktop_file_validate
                    and fname.endswith(".desktop")
                    and os.path.isfile(fpath)
                    and fpath_relative.startswith(xdg_dirs)
                    and not (
                        qa_desktop_file
                        and qa_desktop_file.match(fpath_relative.strip(os.sep))
                        is not None
                    )
                ):

                    desktop_validate = validate_desktop_entry(fpath)
                    if desktop_validate:
                        desktopfile_errors.extend(desktop_validate)

                if fixlafiles and fname.endswith(".la") and os.path.isfile(fpath):
                    f = open(
                        _unicode_encode(
                            fpath, encoding=_encodings["merge"], errors="strict"
                        ),
                        mode="rb",
                    )
                    has_lafile_header = b".la - a libtool library file" in f.readline()
                    f.seek(0)
                    contents = f.read()
                    f.close()
                    try:
                        needs_update, new_contents = rewrite_lafile(contents)
                    except portage.exception.InvalidData as e:
                        needs_update = False
                        if not fixlafiles_announced:
                            fixlafiles_announced = True
                            writemsg("Fixing .la files\n", fd=out)

                        # Suppress warnings if the file does not have the
                        # expected header (bug #340725). Even if the header is
                        # missing, we still call rewrite_lafile() since some
                        # valid libtool archives may not have the header.
                        msg = (
                            "   %s is not a valid libtool archive, skipping\n"
                            % fpath[len(destdir) :]
                        )
                        qa_msg = "QA Notice: invalid .la file found: %s, %s" % (
                            fpath[len(destdir) :],
                            e,
                        )
                        if has_lafile_header:
                            writemsg(msg, fd=out)
                            eqawarn(qa_msg, key=mysettings.mycpv, out=out)

                    if needs_update:
                        if not fixlafiles_announced:
                            fixlafiles_announced = True
                            writemsg("Fixing .la files\n", fd=out)
                        writemsg("   %s\n" % fpath[len(destdir) :], fd=out)
                        # write_atomic succeeds even in some cases in which
                        # a normal write might fail due to file permission
                        # settings on some operating systems such as HP-UX
                        write_atomic(
                            _unicode_encode(
                                fpath, encoding=_encodings["merge"], errors="strict"
                            ),
                            new_contents,
                            mode="wb",
                        )

                mystat = os.lstat(fpath)
                if stat.S_ISREG(mystat.st_mode) and mystat.st_ino not in counted_inodes:
                    counted_inodes.add(mystat.st_ino)
                    size += mystat.st_size
                if mystat.st_uid != portage_uid and mystat.st_gid != portage_gid:
                    continue
                myuid = -1
                mygid = -1
                if mystat.st_uid == portage_uid:
                    myuid = inst_uid
                if mystat.st_gid == portage_gid:
                    mygid = inst_gid
                apply_secpass_permissions(
                    _unicode_encode(fpath, encoding=_encodings["merge"]),
                    uid=myuid,
                    gid=mygid,
                    mode=mystat.st_mode,
                    stat_cached=mystat,
                    follow_links=False,
                )

            if unicode_error:
                break

        if not unicode_error:
            break

    if desktopfile_errors:
        for l in _merge_desktopfile_error(desktopfile_errors):
            l = l.replace(mysettings["ED"], "/")
            eqawarn(l, phase="install", key=mysettings.mycpv, out=out)

    if unicode_errors:
        for l in _merge_unicode_error(unicode_errors):
            eqawarn(l, phase="install", key=mysettings.mycpv, out=out)

    build_info_dir = os.path.join(mysettings["PORTAGE_BUILDDIR"], "build-info")

    f = io.open(
        _unicode_encode(
            os.path.join(build_info_dir, "SIZE"),
            encoding=_encodings["fs"],
            errors="strict",
        ),
        mode="w",
        encoding=_encodings["repo.content"],
        errors="strict",
    )
    f.write("%d\n" % size)
    f.close()

    _reapply_bsdflags_to_image(mysettings)


def _reapply_bsdflags_to_image(mysettings):
    """
    Reapply flags saved and removed by _preinst_bsdflags.
    """
    if bsd_chflags:
        os.system(
            "mtree -e -p %s -U -k flags < %s > /dev/null"
            % (
                _shell_quote(mysettings["D"]),
                _shell_quote(os.path.join(mysettings["T"], "bsdflags.mtree")),
            )
        )


def _post_src_install_soname_symlinks(mysettings, out):
    """
    Check that libraries in $D have corresponding soname symlinks.
    If symlinks are missing then create them and trigger a QA Notice.
    This requires $PORTAGE_BUILDDIR/build-info/NEEDED.ELF.2 for
    operation.
    """

    image_dir = mysettings["D"]
    needed_filename = os.path.join(
        mysettings["PORTAGE_BUILDDIR"], "build-info", "NEEDED.ELF.2"
    )

    f = None
    try:
        f = io.open(
            _unicode_encode(
                needed_filename, encoding=_encodings["fs"], errors="strict"
            ),
            mode="r",
            encoding=_encodings["repo.content"],
            errors="replace",
        )
        lines = f.readlines()
    except IOError as e:
        if e.errno not in (errno.ENOENT, errno.ESTALE):
            raise
        return
    finally:
        if f is not None:
            f.close()

    metadata = {}
    for k in ("QA_PREBUILT", "QA_SONAME_NO_SYMLINK"):
        try:
            with io.open(
                _unicode_encode(
                    os.path.join(mysettings["PORTAGE_BUILDDIR"], "build-info", k),
                    encoding=_encodings["fs"],
                    errors="strict",
                ),
                mode="r",
                encoding=_encodings["repo.content"],
                errors="replace",
            ) as f:
                v = f.read()
        except IOError as e:
            if e.errno not in (errno.ENOENT, errno.ESTALE):
                raise
        else:
            metadata[k] = v

    qa_prebuilt = metadata.get("QA_PREBUILT", "").strip()
    if qa_prebuilt:
        qa_prebuilt = re.compile(
            "|".join(
                fnmatch.translate(x.lstrip(os.sep))
                for x in portage.util.shlex_split(qa_prebuilt)
            )
        )

    qa_soname_no_symlink = metadata.get("QA_SONAME_NO_SYMLINK", "").split()
    if qa_soname_no_symlink:
        if len(qa_soname_no_symlink) > 1:
            qa_soname_no_symlink = "|".join("(%s)" % x for x in qa_soname_no_symlink)
            qa_soname_no_symlink = "^(%s)$" % qa_soname_no_symlink
        else:
            qa_soname_no_symlink = "^%s$" % qa_soname_no_symlink[0]
        qa_soname_no_symlink = re.compile(qa_soname_no_symlink)

    libpaths = set(portage.util.getlibpaths(mysettings["ROOT"], env=mysettings))
    libpath_inodes = set()
    for libpath in libpaths:
        libdir = os.path.join(mysettings["ROOT"], libpath.lstrip(os.sep))
        try:
            s = os.stat(libdir)
        except OSError:
            continue
        else:
            libpath_inodes.add((s.st_dev, s.st_ino))

    is_libdir_cache = {}

    def is_libdir(obj_parent):
        try:
            return is_libdir_cache[obj_parent]
        except KeyError:
            pass

        rval = False
        if obj_parent in libpaths:
            rval = True
        else:
            parent_path = os.path.join(mysettings["ROOT"], obj_parent.lstrip(os.sep))
            try:
                s = os.stat(parent_path)
            except OSError:
                pass
            else:
                if (s.st_dev, s.st_ino) in libpath_inodes:
                    rval = True

        is_libdir_cache[obj_parent] = rval
        return rval

    build_info_dir = os.path.join(mysettings["PORTAGE_BUILDDIR"], "build-info")
    try:
        with io.open(
            _unicode_encode(
                os.path.join(build_info_dir, "PROVIDES_EXCLUDE"),
                encoding=_encodings["fs"],
                errors="strict",
            ),
            mode="r",
            encoding=_encodings["repo.content"],
            errors="replace",
        ) as f:
            provides_exclude = f.read()
    except IOError as e:
        if e.errno not in (errno.ENOENT, errno.ESTALE):
            raise
        provides_exclude = ""

    try:
        with io.open(
            _unicode_encode(
                os.path.join(build_info_dir, "REQUIRES_EXCLUDE"),
                encoding=_encodings["fs"],
                errors="strict",
            ),
            mode="r",
            encoding=_encodings["repo.content"],
            errors="replace",
        ) as f:
            requires_exclude = f.read()
    except IOError as e:
        if e.errno not in (errno.ENOENT, errno.ESTALE):
            raise
        requires_exclude = ""

    missing_symlinks = []
    unrecognized_elf_files = []
    soname_deps = SonameDepsProcessor(provides_exclude, requires_exclude)

    # Parse NEEDED.ELF.2 like LinkageMapELF.rebuild() does, and
    # rewrite it to include multilib categories.
    needed_file = portage.util.atomic_ofstream(
        needed_filename, encoding=_encodings["repo.content"], errors="strict"
    )

    for l in lines:
        l = l.rstrip("\n")
        if not l:
            continue
        try:
            entry = NeededEntry.parse(needed_filename, l)
        except InvalidData as e:
            portage.util.writemsg_level(
                "\n%s\n\n" % (e,), level=logging.ERROR, noiselevel=-1
            )
            continue

        filename = os.path.join(image_dir, entry.filename.lstrip(os.sep))
        with open(
            _unicode_encode(filename, encoding=_encodings["fs"], errors="strict"), "rb"
        ) as f:
            elf_header = ELFHeader.read(f)

        # Compute the multilib category and write it back to the file.
        entry.multilib_category = compute_multilib_category(elf_header)
        needed_file.write(str(entry))

        if entry.multilib_category is None:
            if (
                not qa_prebuilt
                or qa_prebuilt.match(
                    entry.filename[len(mysettings["EPREFIX"]) :].lstrip(os.sep)
                )
                is None
            ):
                unrecognized_elf_files.append(entry)
        else:
            soname_deps.add(entry)

        obj = entry.filename
        soname = entry.soname

        if not soname:
            continue
        if not is_libdir(os.path.dirname(obj)):
            continue
        if (
            qa_soname_no_symlink
            and qa_soname_no_symlink.match(obj.strip(os.sep)) is not None
        ):
            continue

        obj_file_path = os.path.join(image_dir, obj.lstrip(os.sep))
        sym_file_path = os.path.join(os.path.dirname(obj_file_path), soname)
        try:
            os.lstat(sym_file_path)
        except OSError as e:
            if e.errno not in (errno.ENOENT, errno.ESTALE):
                raise
        else:
            continue

        missing_symlinks.append((obj, soname))

    needed_file.close()

    if soname_deps.requires is not None:
        with io.open(
            _unicode_encode(
                os.path.join(build_info_dir, "REQUIRES"),
                encoding=_encodings["fs"],
                errors="strict",
            ),
            mode="w",
            encoding=_encodings["repo.content"],
            errors="strict",
        ) as f:
            f.write(soname_deps.requires)

    if soname_deps.provides is not None:
        with io.open(
            _unicode_encode(
                os.path.join(build_info_dir, "PROVIDES"),
                encoding=_encodings["fs"],
                errors="strict",
            ),
            mode="w",
            encoding=_encodings["repo.content"],
            errors="strict",
        ) as f:
            f.write(soname_deps.provides)
    else:
        if check_dyn_libs_inconsistent(image_dir, soname_deps.provides):
            eerror(
                "Error! Installing dynamic libraries (.so) with blank PROVIDES!",
                phase="install",
                key=mysettings.mycpv,
                out=out,
            )

    if unrecognized_elf_files:
        qa_msg = ["QA Notice: Unrecognized ELF file(s):"]
        qa_msg.append("")
        qa_msg.extend("\t%s" % str(entry).rstrip() for entry in unrecognized_elf_files)
        qa_msg.append("")
        for line in qa_msg:
            eqawarn(line, key=mysettings.mycpv, out=out)

    if not missing_symlinks:
        return

    qa_msg = ["QA Notice: Missing soname symlink(s):"]
    qa_msg.append("")
    qa_msg.extend(
        "\t%s -> %s"
        % (
            os.path.join(os.path.dirname(obj).lstrip(os.sep), soname),
            os.path.basename(obj),
        )
        for obj, soname in missing_symlinks
    )
    qa_msg.append("")
    for line in qa_msg:
        eqawarn(line, key=mysettings.mycpv, out=out)


def _merge_desktopfile_error(errors):
    lines = []

    msg = _(
        "QA Notice: This package installs one or more .desktop files "
        "that do not pass validation."
    )
    lines.extend(wrap(msg, 72))

    lines.append("")
    errors.sort()
    lines.extend("\t" + x for x in errors)
    lines.append("")

    return lines


def _merge_unicode_error(errors):
    lines = []

    msg = _(
        "QA Notice: This package installs one or more file names "
        "containing characters that are not encoded with the UTF-8 encoding."
    )
    lines.extend(wrap(msg, 72))

    lines.append("")
    errors.sort()
    lines.extend("\t" + x for x in errors)
    lines.append("")

    return lines


def _prepare_self_update(settings):
    """
    Call this when portage is updating itself, in order to create
    temporary copies of PORTAGE_BIN_PATH and PORTAGE_PYM_PATH, since
    the new versions may be incompatible. An atexit hook will
    automatically clean up the temporary copies.
    """

    # sanity check: ensure that that this routine only runs once
    if portage._bin_path != portage.const.PORTAGE_BIN_PATH:
        return

    # Load lazily referenced portage submodules into memory,
    # so imports won't fail during portage upgrade/downgrade.
    _preload_elog_modules(settings)
    portage.proxy.lazyimport._preload_portage_submodules()

    # Make the temp directory inside $PORTAGE_TMPDIR/portage, since
    # it's common for /tmp and /var/tmp to be mounted with the
    # "noexec" option (see bug #346899).
    build_prefix = os.path.join(settings["PORTAGE_TMPDIR"], "portage")
    portage.util.ensure_dirs(build_prefix)
    base_path_tmp = tempfile.mkdtemp("", "._portage_reinstall_.", build_prefix)
    portage.process.atexit_register(shutil.rmtree, base_path_tmp)

    orig_bin_path = portage._bin_path
    portage._bin_path = os.path.join(base_path_tmp, "bin")
    shutil.copytree(orig_bin_path, portage._bin_path, symlinks=True)

    orig_pym_path = portage._pym_path
    portage._pym_path = os.path.join(base_path_tmp, "lib")
    os.mkdir(portage._pym_path)
    for pmod in PORTAGE_PYM_PACKAGES:
        shutil.copytree(
            os.path.join(orig_pym_path, pmod),
            os.path.join(portage._pym_path, pmod),
            symlinks=True,
        )

    for dir_path in (base_path_tmp, portage._bin_path, portage._pym_path):
        os.chmod(dir_path, 0o755)


def _handle_self_update(settings, vardb):
    cpv = settings.mycpv
    if settings["ROOT"] == "/" and portage.dep.match_from_list(
        portage.const.PORTAGE_PACKAGE_ATOM, [cpv]
    ):
        _prepare_self_update(settings)
        return True
    return False