"""distutils.dist

Provides the Distribution class, which represents the module distribution

being built/installed/distributed.

"""

# This module should be kept compatible with Python 2.1.

__revision__ = "$Id: dist.py 38697 2005-03-23 18:54:36Z loewis $"

import sys, os, string, re

from types import *

from copy import copy

try:

    import warnings

except ImportError:

    warnings = None

from distutils.errors import *

from distutils.fancy_getopt import FancyGetopt, translate_longopt

from distutils.util import check_environ, strtobool, rfc822_escape

from distutils import log

from distutils.debug import DEBUG

# Regex to define acceptable Distutils command names.  This is not *quite*

# the same as a Python NAME -- I don't allow leading underscores.  The fact

# that they're very similar is no coincidence; the default naming scheme is

# to look for a Python module named after the command.

command_re = re.compile (r'^[a-zA-Z]([a-zA-Z0-9_]*)$')

class Distribution:

    """The core of the Distutils.  Most of the work hiding behind 'setup'

    is really done within a Distribution instance, which farms the work out

    to the Distutils commands specified on the command line.

    Setup scripts will almost never instantiate Distribution directly,

    unless the 'setup()' function is totally inadequate to their needs.

    However, it is conceivable that a setup script might wish to subclass

    Distribution for some specialized purpose, and then pass the subclass

    to 'setup()' as the 'distclass' keyword argument.  If so, it is

    necessary to respect the expectations that 'setup' has of Distribution.

    See the code for 'setup()', in core.py, for details.

    """

    # 'global_options' describes the command-line options that may be

    # supplied to the setup script prior to any actual commands.

    # Eg. "./setup.py -n" or "./setup.py --quiet" both take advantage of

    # these global options.  This list should be kept to a bare minimum,

    # since every global option is also valid as a command option -- and we

    # don't want to pollute the commands with too many options that they

    # have minimal control over.

    # The fourth entry for verbose means that it can be repeated.

    global_options = [('verbose', 'v', "run verbosely (default)", 1),

                      ('quiet', 'q', "run quietly (turns verbosity off)"),

                      ('dry-run', 'n', "don't actually do anything"),

                      ('help', 'h', "show detailed help message"),

                     ]

    # 'common_usage' is a short (2-3 line) string describing the common

    # usage of the setup script.

    common_usage = """\

Common commands: (see '--help-commands' for more)

  setup.py build      will build the package underneath 'build/'

  setup.py install    will install the package

"""

    # options that are not propagated to the commands

    display_options = [

        ('help-commands', None,

         "list all available commands"),

        ('name', None,

         "print package name"),

        ('version', 'V',

         "print package version"),

        ('fullname', None,

         "print <package name>-<version>"),

        ('author', None,

         "print the author's name"),

        ('author-email', None,

         "print the author's email address"),

        ('maintainer', None,

         "print the maintainer's name"),

        ('maintainer-email', None,

         "print the maintainer's email address"),

        ('contact', None,

         "print the maintainer's name if known, else the author's"),

        ('contact-email', None,

         "print the maintainer's email address if known, else the author's"),

        ('url', None,

         "print the URL for this package"),

        ('license', None,

         "print the license of the package"),

        ('licence', None,

         "alias for --license"),

        ('description', None,

         "print the package description"),

        ('long-description', None,

         "print the long package description"),

        ('platforms', None,

         "print the list of platforms"),

        ('classifiers', None,

         "print the list of classifiers"),

        ('keywords', None,

         "print the list of keywords"),

        ('provides', None,

         "print the list of packages/modules provided"),

        ('requires', None,

         "print the list of packages/modules required"),

        ('obsoletes', None,

         "print the list of packages/modules made obsolete")

        ]

    display_option_names = map(lambda x: translate_longopt(x[0]),

                               display_options)

    # negative options are options that exclude other options

    negative_opt = {'quiet': 'verbose'}

    # -- Creation/initialization methods -------------------------------

    def __init__ (self, attrs=None):

        """Construct a new Distribution instance: initialize all the

        attributes of a Distribution, and then use 'attrs' (a dictionary

        mapping attribute names to values) to assign some of those

        attributes their "real" values.  (Any attributes not mentioned in

        'attrs' will be assigned to some null value: 0, None, an empty list

        or dictionary, etc.)  Most importantly, initialize the

        'command_obj' attribute to the empty dictionary; this will be

        filled in with real command objects by 'parse_command_line()'.

        """

        # Default values for our command-line options

        self.verbose = 1

        self.dry_run = 0

        self.help = 0

        for attr in self.display_option_names:

            setattr(self, attr, 0)

        # Store the distribution meta-data (name, version, author, and so

        # forth) in a separate object -- we're getting to have enough

        # information here (and enough command-line options) that it's

        # worth it.  Also delegate 'get_XXX()' methods to the 'metadata'

        # object in a sneaky and underhanded (but efficient!) way.

        self.metadata = DistributionMetadata()

        for basename in self.metadata._METHOD_BASENAMES:

            method_name = "get_" + basename

            setattr(self, method_name, getattr(self.metadata, method_name))

        # 'cmdclass' maps command names to class objects, so we

        # can 1) quickly figure out which class to instantiate when

        # we need to create a new command object, and 2) have a way

        # for the setup script to override command classes

        self.cmdclass = {}

        # 'command_packages' is a list of packages in which commands

        # are searched for.  The factory for command 'foo' is expected

        # to be named 'foo' in the module 'foo' in one of the packages

        # named here.  This list is searched from the left; an error

        # is raised if no named package provides the command being

        # searched for.  (Always access using get_command_packages().)

        self.command_packages = None

        # 'script_name' and 'script_args' are usually set to sys.argv[0]

        # and sys.argv[1:], but they can be overridden when the caller is

        # not necessarily a setup script run from the command-line.

        self.script_name = None

        self.script_args = None

        # 'command_options' is where we store command options between

        # parsing them (from config files, the command-line, etc.) and when

        # they are actually needed -- ie. when the command in question is

        # instantiated.  It is a dictionary of dictionaries of 2-tuples:

        #   command_options = { command_name : { option : (source, value) } }

        self.command_options = {}

        # 'dist_files' is the list of (command, pyversion, file) that

        # have been created by any dist commands run so far. This is

        # filled regardless of whether the run is dry or not. pyversion

        # gives sysconfig.get_python_version() if the dist file is

        # specific to a Python version, 'any' if it is good for all

        # Python versions on the target platform, and '' for a source

        # file. pyversion should not be used to specify minimum or

        # maximum required Python versions; use the metainfo for that

        # instead.

        self.dist_files = []

        # These options are really the business of various commands, rather

        # than of the Distribution itself.  We provide aliases for them in

        # Distribution as a convenience to the developer.

        self.packages = None

        self.package_data = {}

        self.package_dir = None

        self.py_modules = None

        self.libraries = None

        self.headers = None

        self.ext_modules = None

        self.ext_package = None

        self.include_dirs = None

        self.extra_path = None

        self.scripts = None

        self.data_files = None

        # And now initialize bookkeeping stuff that can't be supplied by

        # the caller at all.  'command_obj' maps command names to

        # Command instances -- that's how we enforce that every command

        # class is a singleton.

        self.command_obj = {}

        # 'have_run' maps command names to boolean values; it keeps track

        # of whether we have actually run a particular command, to make it

        # cheap to "run" a command whenever we think we might need to -- if

        # it's already been done, no need for expensive filesystem

        # operations, we just check the 'have_run' dictionary and carry on.

        # It's only safe to query 'have_run' for a command class that has

        # been instantiated -- a false value will be inserted when the

        # command object is created, and replaced with a true value when

        # the command is successfully run.  Thus it's probably best to use

        # '.get()' rather than a straight lookup.

        self.have_run = {}

        # Now we'll use the attrs dictionary (ultimately, keyword args from

        # the setup script) to possibly override any or all of these

        # distribution options.

        if attrs:

            # Pull out the set of command options and work on them

            # specifically.  Note that this order guarantees that aliased

            # command options will override any supplied redundantly

            # through the general options dictionary.

            options = attrs.get('options')

            if options:

                del attrs['options']

                for (command, cmd_options) in options.items():

                    opt_dict = self.get_option_dict(command)

                    for (opt, val) in cmd_options.items():

                        opt_dict[opt] = ("setup script", val)

            if attrs.has_key('licence'):

                attrs['license'] = attrs['licence']

                del attrs['licence']

                msg = "'licence' distribution option is deprecated; use 'license'"

                if warnings is not None:

                    warnings.warn(msg)

                else:

                    sys.stderr.write(msg + "\n")

            # Now work on the rest of the attributes.  Any attribute that's

            # not already defined is invalid!

            for (key,val) in attrs.items():

                if hasattr(self.metadata, "set_" + key):

                    getattr(self.metadata, "set_" + key)(val)

                elif hasattr(self.metadata, key):

                    setattr(self.metadata, key, val)

                elif hasattr(self, key):

                    setattr(self, key, val)

                else:

                    msg = "Unknown distribution option: %s" % repr(key)

                    if warnings is not None:

                        warnings.warn(msg)

                    else:

                        sys.stderr.write(msg + "\n")

        self.finalize_options()

    # __init__ ()

    def get_option_dict (self, command):

        """Get the option dictionary for a given command.  If that

        command's option dictionary hasn't been created yet, then create it

        and return the new dictionary; otherwise, return the existing

        option dictionary.

        """

        dict = self.command_options.get(command)

        if dict is None:

            dict = self.command_options[command] = {}

        return dict

    def dump_option_dicts (self, header=None, commands=None, indent=""):

        from pprint import pformat

        if commands is None:             # dump all command option dicts

            commands = self.command_options.keys()

            commands.sort()

        if header is not None:

            print indent + header

            indent = indent + "  "

        if not commands:

            print indent + "no commands known yet"

            return

        for cmd_name in commands:

            opt_dict = self.command_options.get(cmd_name)

            if opt_dict is None:

                print indent + "no option dict for '%s' command" % cmd_name

            else:

                print indent + "option dict for '%s' command:" % cmd_name

                out = pformat(opt_dict)

                for line in string.split(out, "\n"):

                    print indent + "  " + line

    # dump_option_dicts ()

    # -- Config file finding/parsing methods ---------------------------

    def find_config_files (self):

        """Find as many configuration files as should be processed for this

        platform, and return a list of filenames in the order in which they

        should be parsed.  The filenames returned are guaranteed to exist

        (modulo nasty race conditions).

        There are three possible config files: distutils.cfg in the

        Distutils installation directory (ie. where the top-level

        Distutils __inst__.py file lives), a file in the user's home

        directory named .pydistutils.cfg on Unix and pydistutils.cfg

        on Windows/Mac, and setup.cfg in the current directory.

        """

        files = []

        check_environ()

        # Where to look for the system-wide Distutils config file

        sys_dir = os.path.dirname(sys.modules['distutils'].__file__)

        # Look for the system config file

        sys_file = os.path.join(sys_dir, "distutils.cfg")

        if os.path.isfile(sys_file):

            files.append(sys_file)

        # What to call the per-user config file

        if os.name == 'posix':

            user_filename = ".pydistutils.cfg"

        else:

            user_filename = "pydistutils.cfg"

        # And look for the user config file

        if os.environ.has_key('HOME'):

            user_file = os.path.join(os.environ.get('HOME'), user_filename)

            if os.path.isfile(user_file):

                files.append(user_file)

        # All platforms support local setup.cfg

        local_file = "setup.cfg"

        if os.path.isfile(local_file):

            files.append(local_file)

        return files

    # find_config_files ()

    def parse_config_files (self, filenames=None):

        from ConfigParser import ConfigParser

        if filenames is None:

            filenames = self.find_config_files()

        if DEBUG: print "Distribution.parse_config_files():"

        parser = ConfigParser()

        for filename in filenames:

            if DEBUG: print "  reading", filename

            parser.read(filename)

            for section in parser.sections():

                options = parser.options(section)

                opt_dict = self.get_option_dict(section)

                for opt in options:

                    if opt != '__name__':

                        val = parser.get(section,opt)

                        opt = string.replace(opt, '-', '_')

                        opt_dict[opt] = (filename, val)

            # Make the ConfigParser forget everything (so we retain

            # the original filenames that options come from)

            parser.__init__()

        # If there was a "global" section in the config file, use it

        # to set Distribution options.

        if self.command_options.has_key('global'):

            for (opt, (src, val)) in self.command_options['global'].items():

                alias = self.negative_opt.get(opt)

                try:

                    if alias:

                        setattr(self, alias, not strtobool(val))

                    elif opt in ('verbose', 'dry_run'): # ugh!

                        setattr(self, opt, strtobool(val))

                    else:

                        setattr(self, opt, val)

                except ValueError, msg:

                    raise DistutilsOptionError, msg

    # parse_config_files ()

    # -- Command-line parsing methods ----------------------------------

    def parse_command_line (self):

        """Parse the setup script's command line, taken from the

        'script_args' instance attribute (which defaults to 'sys.argv[1:]'

        -- see 'setup()' in core.py).  This list is first processed for

        "global options" -- options that set attributes of the Distribution

        instance.  Then, it is alternately scanned for Distutils commands

        and options for that command.  Each new command terminates the

        options for the previous command.  The allowed options for a

        command are determined by the 'user_options' attribute of the

        command class -- thus, we have to be able to load command classes

        in order to parse the command line.  Any error in that 'options'

        attribute raises DistutilsGetoptError; any error on the

        command-line raises DistutilsArgError.  If no Distutils commands

        were found on the command line, raises DistutilsArgError.  Return

        true if command-line was successfully parsed and we should carry

        on with executing commands; false if no errors but we shouldn't

        execute commands (currently, this only happens if user asks for

        help).

        """

        #

        # We now have enough information to show the Macintosh dialog

        # that allows the user to interactively specify the "command line".

        #

        toplevel_options = self._get_toplevel_options()

        if sys.platform == 'mac':

            import EasyDialogs

            cmdlist = self.get_command_list()

            self.script_args = EasyDialogs.GetArgv(

                toplevel_options + self.display_options, cmdlist)

        # We have to parse the command line a bit at a time -- global

        # options, then the first command, then its options, and so on --

        # because each command will be handled by a different class, and

        # the options that are valid for a particular class aren't known

        # until we have loaded the command class, which doesn't happen

        # until we know what the command is.

        self.commands = []

        parser = FancyGetopt(toplevel_options + self.display_options)

        parser.set_negative_aliases(self.negative_opt)

        parser.set_aliases({'licence': 'license'})

        args = parser.getopt(args=self.script_args, object=self)

        option_order = parser.get_option_order()

        log.set_verbosity(self.verbose)

        # for display options we return immediately

        if self.handle_display_options(option_order):

            return

        while args:

            args = self._parse_command_opts(parser, args)

            if args is None:            # user asked for help (and got it)

                return

        # Handle the cases of --help as a "global" option, ie.

        # "setup.py --help" and "setup.py --help command ...".  For the

        # former, we show global options (--verbose, --dry-run, etc.)

        # and display-only options (--name, --version, etc.); for the

        # latter, we omit the display-only options and show help for

        # each command listed on the command line.

        if self.help:

            self._show_help(parser,

                            display_options=len(self.commands) == 0,

                            commands=self.commands)

            return

        # Oops, no commands found -- an end-user error

        if not self.commands:

            raise DistutilsArgError, "no commands supplied"

        # All is well: return true

        return 1

    # parse_command_line()

    def _get_toplevel_options (self):

        """Return the non-display options recognized at the top level.

        This includes options that are recognized *only* at the top

        level as well as options recognized for commands.

        """

        return self.global_options + [

            ("command-packages=", None,

             "list of packages that provide distutils commands"),

            ]

    def _parse_command_opts (self, parser, args):

        """Parse the command-line options for a single command.

        'parser' must be a FancyGetopt instance; 'args' must be the list

        of arguments, starting with the current command (whose options

        we are about to parse).  Returns a new version of 'args' with

        the next command at the front of the list; will be the empty

        list if there are no more commands on the command line.  Returns

        None if the user asked for help on this command.

        """

        # late import because of mutual dependence between these modules

        from distutils.cmd import Command

        # Pull the current command from the head of the command line

        command = args[0]

        if not command_re.match(command):

            raise SystemExit, "invalid command name '%s'" % command

        self.commands.append(command)

        # Dig up the command class that implements this command, so we

        # 1) know that it's a valid command, and 2) know which options

        # it takes.

        try:

            cmd_class = self.get_command_class(command)

        except DistutilsModuleError, msg:

            raise DistutilsArgError, msg

        # Require that the command class be derived from Command -- want

        # to be sure that the basic "command" interface is implemented.

        if not issubclass(cmd_class, Command):

            raise DistutilsClassError, \

                  "command class %s must subclass Command" % cmd_class

        # Also make sure that the command object provides a list of its

        # known options.