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"""distutils.command.bdist

Implements the Distutils 'bdist' command (create a built [binary]
distribution)."""

import os
import warnings

from ..core import Command
from ..errors import DistutilsOptionError, DistutilsPlatformError
from ..util import get_platform


def show_formats():
    """Print list of available formats (arguments to "--format" option)."""
    from ..fancy_getopt import FancyGetopt

    formats = []
    for format in bdist.format_commands:
        formats.append(("formats=" + format, None, bdist.format_commands[format][1]))
    pretty_printer = FancyGetopt(formats)
    pretty_printer.print_help("List of available distribution formats:")


class ListCompat(dict):
    # adapter to allow for Setuptools compatibility in format_commands
    def append(self, item):
        warnings.warn(
            """format_commands is now a dict. append is deprecated.""",
            DeprecationWarning,
            stacklevel=2,
        )


class bdist(Command):
    description = "create a built (binary) distribution"

    user_options = [
        ('bdist-base=', 'b', "temporary directory for creating built distributions"),
        (
            'plat-name=',
            'p',
            "platform name to embed in generated filenames "
            f"[default: {get_platform()}]",
        ),
        ('formats=', None, "formats for distribution (comma-separated list)"),
        (
            'dist-dir=',
            'd',
            "directory to put final built distributions in [default: dist]",
        ),
        ('skip-build', None, "skip rebuilding everything (for testing/debugging)"),
        (
            'owner=',
            'u',
            "Owner name used when creating a tar file [default: current user]",
        ),
        (
            'group=',
            'g',
            "Group name used when creating a tar file [default: current group]",
        ),
    ]

    boolean_options = ['skip-build']

    help_options = [
        ('help-formats', None, "lists available distribution formats", show_formats),
    ]

    # The following commands do not take a format option from bdist
    no_format_option = ('bdist_rpm',)

    # This won't do in reality: will need to distinguish RPM-ish Linux,
    # Debian-ish Linux, Solaris, FreeBSD, ..., Windows, Mac OS.
    default_format = {'posix': 'gztar', 'nt': 'zip'}

    # Define commands in preferred order for the --help-formats option
    format_commands = ListCompat({
        'rpm': ('bdist_rpm', "RPM distribution"),
        'gztar': ('bdist_dumb', "gzip'ed tar file"),
        'bztar': ('bdist_dumb', "bzip2'ed tar file"),
        'xztar': ('bdist_dumb', "xz'ed tar file"),
        'ztar': ('bdist_dumb', "compressed tar file"),
        'tar': ('bdist_dumb', "tar file"),
        'zip': ('bdist_dumb', "ZIP file"),
    })

    # for compatibility until consumers only reference format_commands
    format_command = format_commands

    def initialize_options(self):
        self.bdist_base = None
        self.plat_name = None
        self.formats = None
        self.dist_dir = None
        self.skip_build = False
        self.group = None
        self.owner = None

    def finalize_options(self):
        # have to finalize 'plat_name' before 'bdist_base'
        if self.plat_name is None:
            if self.skip_build:
                self.plat_name = get_platform()
            else:
                self.plat_name = self.get_finalized_command('build').plat_name

        # 'bdist_base' -- parent of per-built-distribution-format
        # temporary directories (eg. we'll probably have
        # "build/bdist.<plat>/dumb", "build/bdist.<plat>/rpm", etc.)
        if self.bdist_base is None:
            build_base = self.get_finalized_command('build').build_base
            self.bdist_base = os.path.join(build_base, 'bdist.' + self.plat_name)

        self.ensure_string_list('formats')
        if self.formats is None:
            try:
                self.formats = [self.default_format[os.name]]
            except KeyError:
                raise DistutilsPlatformError(
                    "don't know how to create built distributions "
                    f"on platform {os.name}"
                )

        if self.dist_dir is None:
            self.dist_dir = "dist"

    def run(self):
        # Figure out which sub-commands we need to run.
        commands = []
        for format in self.formats:
            try:
                commands.append(self.format_commands[format][0])
            except KeyError:
                raise DistutilsOptionError(f"invalid format '{format}'")

        # Reinitialize and run each command.
        for i in range(len(self.formats)):
            cmd_name = commands[i]
            sub_cmd = self.reinitialize_command(cmd_name)
            if cmd_name not in self.no_format_option:
                sub_cmd.format = self.formats[i]

            # passing the owner and group names for tar archiving
            if cmd_name == 'bdist_dumb':
                sub_cmd.owner = self.owner
                sub_cmd.group = self.group

            # If we're going to need to run this command again, tell it to
            # keep its temporary files around so subsequent runs go faster.
            if cmd_name in commands[i + 1 :]:
                sub_cmd.keep_temp = True
            self.run_command(cmd_name)