Source

distutils2 / distutils2 / dist.py

Full commit
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
"""distutils.dist

Provides the Distribution class, which represents the module distribution
being built/installed/distributed.
"""

__revision__ = "$Id: dist.py 77717 2010-01-24 00:33:32Z tarek.ziade $"

import sys
import os
import re
import warnings

from distutils2.errors import (DistutilsOptionError, DistutilsArgError,
                               DistutilsModuleError, DistutilsClassError)
from distutils2.fancy_getopt import FancyGetopt
from distutils2.util import strtobool, resolve_name
from distutils2 import log
from distutils2.metadata import DistributionMetadata
from distutils2.config import Config

# 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(object):
    """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"),
                      ('no-user-cfg', None,
                       'ignore pydistutils.cfg in your home directory'),
    ]

    # '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"),
        ('classifier', 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"),
        ('use-2to3', None,
         "use 2to3 to make source python 3.x compatible"),
        ('convert-2to3-doctests', None,
         "use 2to3 to convert doctests in seperate text files"),
        ]
    display_option_names = [x[0].replace('-', '_') for x in 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 configuration
        self.config = Config(self)

        # Store the distribution metadata (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.
        self.metadata = DistributionMetadata()

        # '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 = []
        self.package_data = {}
        self.package_dir = None
        self.py_modules = []
        self.libraries = []
        self.headers = []
        self.ext_modules = []
        self.ext_package = None
        self.include_dirs = []
        self.extra_path = None
        self.scripts = []
        self.data_files = []
        self.password = ''
        self.use_2to3 = False
        self.convert_2to3_doctests = []

        # 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 is not None:
            # 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 is not None:
                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)

            # Now work on the rest of the attributes.  Any attribute that's
            # not already defined is invalid!
            for key, val in attrs.items():
                if self.metadata.is_metadata_field(key):
                    self.metadata[key] = val
                elif hasattr(self, key):
                    setattr(self, key, val)
                else:
                    msg = "Unknown distribution option: %r" % key
                    warnings.warn(msg)

        # no-user-cfg is handled before other command line args
        # because other args override the config files, and this
        # one is needed before we can load the config files.
        # If attrs['script_args'] wasn't passed, assume false.
        #
        # This also make sure we just look at the global options
        self.want_user_cfg = True

        if self.script_args is not None:
            for arg in self.script_args:
                if not arg.startswith('-'):
                    break
                if arg == '--no-user-cfg':
                    self.want_user_cfg = False
                    break

        self.finalize_options()

    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.
        """
        d = self.command_options.get(command)
        if d is None:
            d = self.command_options[command] = {}
        return d

    def get_fullname(self):
        return self.metadata.get_fullname()

    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:
            self.announce(indent + header)
            indent = indent + "  "

        if not commands:
            self.announce(indent + "no commands known yet")
            return

        for cmd_name in commands:
            opt_dict = self.command_options.get(cmd_name)
            if opt_dict is None:
                self.announce(indent +
                              "no option dict for '%s' command" % cmd_name)
            else:
                self.announce(indent +
                              "option dict for '%s' command:" % cmd_name)
                out = pformat(opt_dict)
                for line in out.split('\n'):
                    self.announce(indent + "  " + line)

    # -- Config file finding/parsing methods ---------------------------
    # XXX to be removed
    def parse_config_files(self, filenames=None):
        return self.config.parse_config_files(filenames)

    def find_config_files(self):
        return self.config.find_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()

        # 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

    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 distutils2.command.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.
        if not (hasattr(cmd_class, 'user_options') and
                isinstance(cmd_class.user_options, list)):
            raise DistutilsClassError(
                  ("command class %s must provide "
                   "'user_options' attribute (a list of tuples)") % cmd_class)

        # If the command class has a list of negative alias options,
        # merge it in with the global negative aliases.
        negative_opt = self.negative_opt
        if hasattr(cmd_class, 'negative_opt'):
            negative_opt = negative_opt.copy()
            negative_opt.update(cmd_class.negative_opt)

        # Check for help_options in command class.  They have a different
        # format (tuple of four) so we need to preprocess them here.
        if (hasattr(cmd_class, 'help_options') and
            isinstance(cmd_class.help_options, list)):
            help_options = fix_help_options(cmd_class.help_options)
        else:
            help_options = []

        # All commands support the global options too, just by adding
        # in 'global_options'.
        parser.set_option_table(self.global_options +
                                cmd_class.user_options +
                                help_options)
        parser.set_negative_aliases(negative_opt)
        (args, opts) = parser.getopt(args[1:])
        if hasattr(opts, 'help') and opts.help:
            self._show_help(parser, display_options=0, commands=[cmd_class])
            return

        if (hasattr(cmd_class, 'help_options') and
            isinstance(cmd_class.help_options, list)):
            help_option_found = 0
            for (help_option, short, desc, func) in cmd_class.help_options:
                if hasattr(opts, help_option.replace('-', '_')):
                    help_option_found = 1
                    if hasattr(func, '__call__'):
                        func()
                    else:
                        raise DistutilsClassError(
                            "invalid help function %r for help option '%s': "
                            "must be a callable object (function, etc.)"
                            % (func, help_option))

            if help_option_found:
                return

        # Put the options from the command line into their official
        # holding pen, the 'command_options' dictionary.
        opt_dict = self.get_option_dict(command)
        for (name, value) in vars(opts).items():
            opt_dict[name] = ("command line", value)

        return args

    def finalize_options(self):
        """Set final values for all the options on the Distribution
        instance, analogous to the .finalize_options() method of Command
        objects.
        """
        if getattr(self, 'convert_2to3_doctests', None):
            self.convert_2to3_doctests = [os.path.join(p)
                                for p in self.convert_2to3_doctests]
        else:
            self.convert_2to3_doctests = []

    def _show_help(self, parser, global_options=1, display_options=1,
                   commands=[]):
        """Show help for the setup script command line in the form of
        several lists of command-line options.  'parser' should be a
        FancyGetopt instance; do not expect it to be returned in the
        same state, as its option table will be reset to make it
        generate the correct help text.

        If 'global_options' is true, lists the global options:
        --verbose, --dry-run, etc.  If 'display_options' is true, lists
        the "display-only" options: --name, --version, etc.  Finally,
        lists per-command help for every command name or command class
        in 'commands'.
        """
        # late import because of mutual dependence between these modules
        from distutils2.core import gen_usage
        from distutils2.command.cmd import Command

        if global_options:
            if display_options:
                options = self._get_toplevel_options()
            else:
                options = self.global_options
            parser.set_option_table(options)
            parser.print_help(self.common_usage + "\nGlobal options:")
            print('')

        if display_options:
            parser.set_option_table(self.display_options)
            parser.print_help(
                "Information display options (just display " +
                "information, ignore any commands)")
            print('')

        for command in self.commands:
            if isinstance(command, type) and issubclass(command, Command):
                cls = command
            else:
                cls = self.get_command_class(command)
            if (hasattr(cls, 'help_options') and
                isinstance(cls.help_options, list)):
                parser.set_option_table(cls.user_options +
                                        fix_help_options(cls.help_options))
            else:
                parser.set_option_table(cls.user_options)
            parser.print_help("Options for '%s' command:" % cls.__name__)
            print('')

        print(gen_usage(self.script_name))

    def handle_display_options(self, option_order):
        """If there were any non-global "display-only" options
        (--help-commands or the metadata display options) on the command
        line, display the requested info and return true; else return
        false.
        """
        from distutils2.core import gen_usage

        # User just wants a list of commands -- we'll print it out and stop
        # processing now (ie. if they ran "setup --help-commands foo bar",
        # we ignore "foo bar").
        if self.help_commands:
            self.print_commands()
            print('')
            print(gen_usage(self.script_name))
            return 1

        # If user supplied any of the "display metadata" options, then
        # display that metadata in the order in which the user supplied the
        # metadata options.
        any_display_options = 0
        is_display_option = {}
        for option in self.display_options:
            is_display_option[option[0]] = 1

        for opt, val in option_order:
            if val and is_display_option.get(opt):
                opt = opt.replace('-', '_')
                value = self.metadata[opt]
                if opt in ['keywords', 'platform']:
                    print(','.join(value))
                elif opt in ('classifier', 'provides', 'requires',
                             'obsoletes'):
                    print('\n'.join(value))
                else:
                    print(value)
                any_display_options = 1

        return any_display_options

    def print_command_list(self, commands, header, max_length):
        """Print a subset of the list of all commands -- used by
        'print_commands()'.
        """
        print(header + ":")

        for cmd in commands:
            cls = self.cmdclass.get(cmd)
            if not cls:
                cls = self.get_command_class(cmd)
            try:
                description = cls.description
            except AttributeError:
                description = "(no description available)"

            print("  %-*s  %s" % (max_length, cmd, description))

    def _get_command_groups(self):
        """Helper function to retrieve all the command class names divided
        into standard commands (listed in distutils2.command.__all__)
        and extra commands (given in self.cmdclass and not standard
        commands).
        """
        from distutils2.command import __all__ as std_commands
        extra_commands = [cmd for cmd in self.cmdclass
                          if cmd not in std_commands]
        return std_commands, extra_commands

    def print_commands(self):
        """Print out a help message listing all available commands with a
        description of each.  The list is divided into standard commands
        (listed in distutils2.command.__all__) and extra commands
        (given in self.cmdclass and not standard commands).  The
        descriptions come from the command class attribute
        'description'.
        """
        std_commands, extra_commands = self._get_command_groups()
        max_length = 0
        for cmd in (std_commands + extra_commands):
            if len(cmd) > max_length:
                max_length = len(cmd)

        self.print_command_list(std_commands,
                                "Standard commands",
                                max_length)
        if extra_commands:
            print
            self.print_command_list(extra_commands,
                                    "Extra commands",
                                    max_length)

    def get_command_list(self):
        """Get a list of (command, description) tuples.

        The list is divided into standard commands (listed in
        distutils2.command.__all__) and extra commands (given in
        self.cmdclass and not standard commands).  The descriptions come
        from the command class attribute 'description'.
        """
        # Currently this is only used on Mac OS, for the Mac-only GUI
        # Distutils interface (by Jack Jansen)

        rv = []
        for cls in self.get_command_classes():
            try:
                description = cls.description
            except AttributeError:
                description = "(no description available)"
            rv.append((cmd, description))
        return rv

    # -- Command class/object methods ----------------------------------

    def get_command_packages(self):
        """Return a list of packages from which commands are loaded."""
        pkgs = self.command_packages
        if not isinstance(pkgs, list):
            if pkgs is None:
                pkgs = ''
            pkgs = [pkg.strip() for pkg in pkgs.split(',') if pkg != '']
            if "distutils2.command" not in pkgs:
                pkgs.insert(0, "distutils2.command")
            self.command_packages = pkgs
        return pkgs

    def get_command_names(self):
        """Return a list of all command names."""
        return [getattr(cls, 'command_name', cls.__name__)
                for cls in self.get_command_classes()]

    def get_command_classes(self):
        """Return a list of all command classes."""
        std_commands, extra_commands = self._get_command_groups()
        classes = []
        for cmd in (std_commands + extra_commands):
            try:
                cls = self.cmdclass[cmd]
            except KeyError:
                cls = self.get_command_class(cmd)
            classes.append(cls)
        return classes

    def get_command_class(self, command):
        """Return the class that implements the Distutils command named by
        'command'.  First we check the 'cmdclass' dictionary; if the
        command is mentioned there, we fetch the class object from the
        dictionary and return it.  Otherwise we load the command module
        ("distutils.command." + command) and fetch the command class from
        the module.  The loaded class is also stored in 'cmdclass'
        to speed future calls to 'get_command_class()'.

        Raises DistutilsModuleError if the expected module could not be
        found, or if that module does not define the expected class.
        """
        cls = self.cmdclass.get(command)
        if cls:
            return cls

        for pkgname in self.get_command_packages():
            module_name = "%s.%s" % (pkgname, command)
            class_name = command

            try:
                __import__(module_name)
                module = sys.modules[module_name]
            except ImportError:
                continue

            try:
                cls = getattr(module, class_name)
            except AttributeError:
                raise DistutilsModuleError(
                      "invalid command '%s' (no class '%s' in module '%s')" %
                      (command, class_name, module_name))

            self.cmdclass[command] = cls
            return cls

        raise DistutilsModuleError("invalid command '%s'" % command)

    def get_command_obj(self, command, create=1):
        """Return the command object for 'command'.  Normally this object
        is cached on a previous call to 'get_command_obj()'; if no command
        object for 'command' is in the cache, then we either create and
        return it (if 'create' is true) or return None.
        """
        cmd_obj = self.command_obj.get(command)
        if not cmd_obj and create:
            log.debug("Distribution.get_command_obj(): " \
                      "creating '%s' command object" % command)

            cls = self.get_command_class(command)
            cmd_obj = self.command_obj[command] = cls(self)
            self.have_run[command] = 0

            # Set any options that were supplied in config files
            # or on the command line.  (NB. support for error
            # reporting is lame here: any errors aren't reported
            # until 'finalize_options()' is called, which means
            # we won't report the source of the error.)
            options = self.command_options.get(command)
            if options:
                self._set_command_options(cmd_obj, options)

        return cmd_obj

    def _set_command_options(self, command_obj, option_dict=None):
        """Set the options for 'command_obj' from 'option_dict'.  Basically
        this means copying elements of a dictionary ('option_dict') to
        attributes of an instance ('command').

        'command_obj' must be a Command instance.  If 'option_dict' is not
        supplied, uses the standard option dictionary for this command
        (from 'self.command_options').
        """
        command_name = command_obj.get_command_name()
        if option_dict is None:
            option_dict = self.get_option_dict(command_name)

        log.debug("  setting options for '%s' command:" % command_name)

        for (option, (source, value)) in option_dict.items():
            log.debug("    %s = %s (from %s)" % (option, value,
                                                         source))
            try:
                bool_opts = [x.replace('-', '_')
                             for x in command_obj.boolean_options]
            except AttributeError:
                bool_opts = []
            try:
                neg_opt = command_obj.negative_opt
            except AttributeError:
                neg_opt = {}

            try:
                is_string = isinstance(value, str)
                if option in neg_opt and is_string:
                    setattr(command_obj, neg_opt[option], not strtobool(value))
                elif option in bool_opts and is_string:
                    setattr(command_obj, option, strtobool(value))
                elif hasattr(command_obj, option):
                    setattr(command_obj, option, value)
                else:
                    raise DistutilsOptionError(
                        "error in %s: command '%s' has no such option '%s'" %
                        (source, command_name, option))
            except ValueError, msg:
                raise DistutilsOptionError(msg)

    def get_reinitialized_command(self, command, reinit_subcommands=0):
        """Reinitializes a command to the state it was in when first
        returned by 'get_command_obj()': ie., initialized but not yet
        finalized.  This provides the opportunity to sneak option
        values in programmatically, overriding or supplementing
        user-supplied values from the config files and command line.
        You'll have to re-finalize the command object (by calling
        'finalize_options()' or 'ensure_finalized()') before using it for
        real.

        'command' should be a command name (string) or command object.  If
        'reinit_subcommands' is true, also reinitializes the command's
        sub-commands, as declared by the 'sub_commands' class attribute (if
        it has one).  See the "install" command for an example.  Only
        reinitializes the sub-commands that actually matter, ie. those
        whose test predicates return true.

        Returns the reinitialized command object.
        """
        from distutils2.command.cmd import Command
        if not isinstance(command, Command):
            command_name = command
            command = self.get_command_obj(command_name)
        else:
            command_name = command.get_command_name()

        if not command.finalized:
            return command
        command.initialize_options()
        command.finalized = 0
        self.have_run[command_name] = 0
        self._set_command_options(command)

        if reinit_subcommands:
            for sub in command.get_sub_commands():
                self.get_reinitialized_command(sub, reinit_subcommands)

        return command

    # -- Methods that operate on the Distribution ----------------------

    def announce(self, msg, level=log.INFO):
        log.log(level, msg)

    def run_commands(self):
        """Run each command that was seen on the setup script command line.
        Uses the list of commands found and cache of command objects
        created by 'get_command_obj()'.
        """
        for cmd in self.commands:
            self.run_command(cmd)

    # -- Methods that operate on its Commands --------------------------

    def run_command(self, command):
        """Do whatever it takes to run a command (including nothing at all,
        if the command has already been run).  Specifically: if we have
        already created and run the command named by 'command', return
        silently without doing anything.  If the command named by 'command'
        doesn't even have a command object yet, create one.  Then invoke
        'run()' on that command object (or an existing one).
        """
        # Already been here, done that? then return silently.
        if self.have_run.get(command):
            return

        cmd_obj = self.get_command_obj(command)
        cmd_obj.ensure_finalized()
        self.run_command_hooks(cmd_obj, 'pre_hook')
        log.info("running %s", command)
        cmd_obj.run()
        self.run_command_hooks(cmd_obj, 'post_hook')
        self.have_run[command] = 1

    def run_command_hooks(self, cmd_obj, hook_kind):
        """Run hooks registered for that command and phase.

        *cmd_obj* is a finalized command object; *hook_kind* is either
        'pre_hook' or 'post_hook'.
        """
        if hook_kind not in ('pre_hook', 'post_hook'):
            raise ValueError('invalid hook kind: %r' % hook_kind)

        hooks = getattr(cmd_obj, hook_kind)

        if hooks is None:
            return

        for hook in hooks.itervalues():
            if isinstance(hook, basestring):
                try:
                    hook_obj = resolve_name(hook)
                except ImportError, e:
                    raise DistutilsModuleError(e)
            else:
                hook_obj = hook

            if not hasattr(hook_obj, '__call__'):
                raise DistutilsOptionError('hook %r is not callable' % hook)

            log.info('running %s %s for command %s',
                     hook_kind, hook, cmd_obj.get_command_name())
            hook_obj(cmd_obj)

    # -- Distribution query methods ------------------------------------
    def has_pure_modules(self):
        return len(self.packages or self.py_modules or []) > 0

    def has_ext_modules(self):
        return self.ext_modules and len(self.ext_modules) > 0

    def has_c_libraries(self):
        return self.libraries and len(self.libraries) > 0

    def has_modules(self):
        return self.has_pure_modules() or self.has_ext_modules()

    def has_headers(self):
        return self.headers and len(self.headers) > 0

    def has_scripts(self):
        return self.scripts and len(self.scripts) > 0

    def has_data_files(self):
        return self.data_files and len(self.data_files) > 0

    def is_pure(self):
        return (self.has_pure_modules() and
                not self.has_ext_modules() and
                not self.has_c_libraries())


# XXX keep for compat or remove?

def fix_help_options(options):
    """Convert a 4-tuple 'help_options' list as found in various command
    classes to the 3-tuple form required by FancyGetopt.
    """
    new_options = []
    for help_tuple in options:
        new_options.append(help_tuple[0:3])
    return new_options