mirror of https://github.com/python/cpython.git
689 lines
26 KiB
Python
689 lines
26 KiB
Python
"""distutils.dist
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Provides the Distribution class, which represents the module distribution
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being built/installed/distributed."""
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# created 2000/04/03, Greg Ward
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# (extricated from core.py; actually dates back to the beginning)
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__revision__ = "$Id$"
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import sys, string, re
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from types import *
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from copy import copy
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from distutils.errors import *
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from distutils.fancy_getopt import FancyGetopt, longopt_xlate
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# Regex to define acceptable Distutils command names. This is not *quite*
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# the same as a Python NAME -- I don't allow leading underscores. The fact
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# that they're very similar is no coincidence; the default naming scheme is
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# to look for a Python module named after the command.
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command_re = re.compile (r'^[a-zA-Z]([a-zA-Z0-9_]*)$')
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class Distribution:
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"""The core of the Distutils. Most of the work hiding behind
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'setup' is really done within a Distribution instance, which
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farms the work out to the Distutils commands specified on the
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command line.
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Clients will almost never instantiate Distribution directly,
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unless the 'setup' function is totally inadequate to their needs.
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However, it is conceivable that a client might wish to subclass
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Distribution for some specialized purpose, and then pass the
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subclass to 'setup' as the 'distclass' keyword argument. If so,
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it is necessary to respect the expectations that 'setup' has of
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Distribution: it must have a constructor and methods
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'parse_command_line()' and 'run_commands()' with signatures like
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those described below."""
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# 'global_options' describes the command-line options that may be
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# supplied to the setup script prior to any actual commands.
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# Eg. "./setup.py -n" or "./setup.py --quiet" both take advantage of
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# these global options. This list should be kept to a bare minimum,
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# since every global option is also valid as a command option -- and we
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# don't want to pollute the commands with too many options that they
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# have minimal control over.
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global_options = [('verbose', 'v',
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"run verbosely (default)"),
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('quiet', 'q',
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"run quietly (turns verbosity off)"),
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('dry-run', 'n',
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"don't actually do anything"),
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('help', 'h',
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"show this help message, plus help for any commands " +
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"given on the command-line"),
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]
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# options that are not propagated to the commands
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display_options = [
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('help-commands', None,
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"list all available commands"),
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('name', None,
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"print package name"),
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('version', 'V',
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"print package version"),
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('fullname', None,
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"print <package name>-<version>"),
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('author', None,
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"print the author's name"),
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('author-email', None,
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"print the author's email address"),
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('maintainer', None,
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"print the maintainer's name"),
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('maintainer-email', None,
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"print the maintainer's email address"),
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('contact', None,
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"print the name of the maintainer if present, "
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"else author"),
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('contact-email', None,
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"print the email of the maintainer if present, "
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"else author"),
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('url', None,
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"print the URL for this package"),
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('licence', None,
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"print the licence of the package"),
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('license', None,
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"alias for --licence"),
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('description', None,
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"print the package description"),
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]
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display_option_names = map(lambda x: string.translate(x[0], longopt_xlate),
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display_options)
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# negative options are options that exclude other options
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negative_opt = {'quiet': 'verbose'}
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# -- Creation/initialization methods -------------------------------
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def __init__ (self, attrs=None):
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"""Construct a new Distribution instance: initialize all the
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attributes of a Distribution, and then uses 'attrs' (a
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dictionary mapping attribute names to values) to assign
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some of those attributes their "real" values. (Any attributes
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not mentioned in 'attrs' will be assigned to some null
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value: 0, None, an empty list or dictionary, etc.) Most
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importantly, initialize the 'command_obj' attribute
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to the empty dictionary; this will be filled in with real
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command objects by 'parse_command_line()'."""
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# Default values for our command-line options
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self.verbose = 1
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self.dry_run = 0
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self.help = 0
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for attr in self.display_option_names:
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setattr(self, attr, 0)
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# Store the distribution meta-data (name, version, author, and so
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# forth) in a separate object -- we're getting to have enough
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# information here (and enough command-line options) that it's
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# worth it. Also delegate 'get_XXX()' methods to the 'metadata'
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# object in a sneaky and underhanded (but efficient!) way.
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self.metadata = DistributionMetadata ()
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method_basenames = dir(self.metadata) + \
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['fullname', 'contact', 'contact_email']
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for basename in method_basenames:
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method_name = "get_" + basename
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setattr(self, method_name, getattr(self.metadata, method_name))
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# 'cmdclass' maps command names to class objects, so we
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# can 1) quickly figure out which class to instantiate when
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# we need to create a new command object, and 2) have a way
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# for the setup script to override command classes
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self.cmdclass = {}
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# These options are really the business of various commands, rather
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# than of the Distribution itself. We provide aliases for them in
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# Distribution as a convenience to the developer.
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self.packages = None
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self.package_dir = None
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self.py_modules = None
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self.libraries = None
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self.ext_modules = None
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self.ext_package = None
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self.include_dirs = None
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self.extra_path = None
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# And now initialize bookkeeping stuff that can't be supplied by
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# the caller at all. 'command_obj' maps command names to
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# Command instances -- that's how we enforce that every command
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# class is a singleton.
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self.command_obj = {}
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# 'have_run' maps command names to boolean values; it keeps track
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# of whether we have actually run a particular command, to make it
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# cheap to "run" a command whenever we think we might need to -- if
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# it's already been done, no need for expensive filesystem
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# operations, we just check the 'have_run' dictionary and carry on.
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# It's only safe to query 'have_run' for a command class that has
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# been instantiated -- a false value will be inserted when the
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# command object is created, and replaced with a true value when
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# the command is succesfully run. Thus it's probably best to use
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# '.get()' rather than a straight lookup.
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self.have_run = {}
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# Now we'll use the attrs dictionary (ultimately, keyword args from
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# the setup script) to possibly override any or all of these
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# distribution options.
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if attrs:
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# Pull out the set of command options and work on them
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# specifically. Note that this order guarantees that aliased
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# command options will override any supplied redundantly
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# through the general options dictionary.
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options = attrs.get ('options')
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if options:
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del attrs['options']
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for (command, cmd_options) in options.items():
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cmd_obj = self.find_command_obj (command)
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for (key, val) in cmd_options.items():
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cmd_obj.set_option (key, val)
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# loop over commands
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# if any command options
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# Now work on the rest of the attributes. Any attribute that's
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# not already defined is invalid!
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for (key,val) in attrs.items():
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if hasattr (self.metadata, key):
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setattr (self.metadata, key, val)
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elif hasattr (self, key):
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setattr (self, key, val)
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else:
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raise DistutilsSetupError, \
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"invalid distribution option '%s'" % key
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# __init__ ()
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def parse_command_line (self, args):
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"""Parse the setup script's command line: set any Distribution
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attributes tied to command-line options, create all command
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objects, and set their options from the command-line. 'args'
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must be a list of command-line arguments, most likely
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'sys.argv[1:]' (see the 'setup()' function). This list is first
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processed for "global options" -- options that set attributes of
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the Distribution instance. Then, it is alternately scanned for
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Distutils command and options for that command. Each new
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command terminates the options for the previous command. The
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allowed options for a command are determined by the 'options'
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attribute of the command object -- thus, we instantiate (and
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cache) every command object here, in order to access its
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'options' attribute. Any error in that 'options' attribute
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raises DistutilsGetoptError; any error on the command-line
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raises DistutilsArgError. If no Distutils commands were found
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on the command line, raises DistutilsArgError. Return true if
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command-line successfully parsed and we should carry on with
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executing commands; false if no errors but we shouldn't execute
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commands (currently, this only happens if user asks for
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help)."""
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# late import because of mutual dependence between these modules
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from distutils.cmd import Command
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from distutils.core import usage
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# We have to parse the command line a bit at a time -- global
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# options, then the first command, then its options, and so on --
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# because each command will be handled by a different class, and
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# the options that are valid for a particular class aren't
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# known until we instantiate the command class, which doesn't
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# happen until we know what the command is.
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self.commands = []
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parser = FancyGetopt (self.global_options + self.display_options)
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parser.set_negative_aliases (self.negative_opt)
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parser.set_aliases ({'license': 'licence'})
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args = parser.getopt (object=self)
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option_order = parser.get_option_order()
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# for display options we return immediately
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if self.handle_display_options(option_order):
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return
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while args:
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# Pull the current command from the head of the command line
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command = args[0]
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if not command_re.match (command):
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raise SystemExit, "invalid command name '%s'" % command
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self.commands.append (command)
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# Make sure we have a command object to put the options into
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# (this either pulls it out of a cache of command objects,
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# or finds and instantiates the command class).
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try:
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cmd_obj = self.find_command_obj (command)
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except DistutilsModuleError, msg:
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raise DistutilsArgError, msg
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# Require that the command class be derived from Command --
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# that way, we can be sure that we at least have the 'run'
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# and 'get_option' methods.
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if not isinstance (cmd_obj, Command):
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raise DistutilsClassError, \
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"command class %s must subclass Command" % \
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cmd_obj.__class__
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# Also make sure that the command object provides a list of its
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# known options
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if not (hasattr (cmd_obj, 'user_options') and
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type (cmd_obj.user_options) is ListType):
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raise DistutilsClassError, \
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("command class %s must provide " +
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"'user_options' attribute (a list of tuples)") % \
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cmd_obj.__class__
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# Poof! like magic, all commands support the global
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# options too, just by adding in 'global_options'.
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negative_opt = self.negative_opt
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if hasattr (cmd_obj, 'negative_opt'):
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negative_opt = copy (negative_opt)
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negative_opt.update (cmd_obj.negative_opt)
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parser.set_option_table (self.global_options +
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cmd_obj.user_options)
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parser.set_negative_aliases (negative_opt)
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args = parser.getopt (args[1:], cmd_obj)
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if cmd_obj.help:
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parser.set_option_table (self.global_options)
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parser.print_help ("Global options:")
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print
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parser.set_option_table (cmd_obj.user_options)
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parser.print_help ("Options for '%s' command:" % command)
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print
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print usage
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return
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self.command_obj[command] = cmd_obj
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self.have_run[command] = 0
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# while args
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# If the user wants help -- ie. they gave the "--help" option --
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# give it to 'em. We do this *after* processing the commands in
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# case they want help on any particular command, eg.
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# "setup.py --help foo". (This isn't the documented way to
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# get help on a command, but I support it because that's how
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# CVS does it -- might as well be consistent.)
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if self.help:
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parser.set_option_table (self.global_options)
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parser.print_help (
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"Global options (apply to all commands, " +
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"or can be used per command):")
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print
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if not self.commands:
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parser.set_option_table (self.display_options)
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parser.print_help (
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"Information display options (just display " +
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"information, ignore any commands)")
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print
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for command in self.commands:
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klass = self.find_command_class (command)
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parser.set_option_table (klass.user_options)
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parser.print_help ("Options for '%s' command:" % command)
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print
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print usage
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return
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# Oops, no commands found -- an end-user error
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if not self.commands:
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raise DistutilsArgError, "no commands supplied"
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# All is well: return true
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return 1
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# parse_command_line()
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def handle_display_options (self, option_order):
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"""If there were any non-global "display-only" options
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(--help-commands or the metadata display options) on the command
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line, display the requested info and return true; else return
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false."""
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from distutils.core import usage
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# User just wants a list of commands -- we'll print it out and stop
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# processing now (ie. if they ran "setup --help-commands foo bar",
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# we ignore "foo bar").
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if self.help_commands:
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self.print_commands ()
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print
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print usage
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return 1
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# If user supplied any of the "display metadata" options, then
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# display that metadata in the order in which the user supplied the
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# metadata options.
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any_display_options = 0
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is_display_option = {}
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for option in self.display_options:
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is_display_option[option[0]] = 1
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for (opt, val) in option_order:
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if val and is_display_option.get(opt):
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opt = string.translate (opt, longopt_xlate)
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print getattr(self.metadata, "get_"+opt)()
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any_display_options = 1
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return any_display_options
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# handle_display_options()
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def print_command_list (self, commands, header, max_length):
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"""Print a subset of the list of all commands -- used by
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'print_commands()'."""
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print header + ":"
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for cmd in commands:
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klass = self.cmdclass.get (cmd)
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if not klass:
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klass = self.find_command_class (cmd)
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try:
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description = klass.description
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except AttributeError:
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description = "(no description available)"
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print " %-*s %s" % (max_length, cmd, description)
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# print_command_list ()
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def print_commands (self):
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"""Print out a help message listing all available commands with
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a description of each. The list is divided into "standard
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commands" (listed in distutils.command.__all__) and "extra
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commands" (mentioned in self.cmdclass, but not a standard
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command). The descriptions come from the command class
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attribute 'description'."""
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import distutils.command
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std_commands = distutils.command.__all__
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is_std = {}
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for cmd in std_commands:
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is_std[cmd] = 1
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extra_commands = []
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for cmd in self.cmdclass.keys():
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if not is_std.get(cmd):
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extra_commands.append (cmd)
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max_length = 0
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for cmd in (std_commands + extra_commands):
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if len (cmd) > max_length:
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max_length = len (cmd)
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self.print_command_list (std_commands,
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"Standard commands",
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max_length)
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if extra_commands:
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print
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self.print_command_list (extra_commands,
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"Extra commands",
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max_length)
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# print_commands ()
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# -- Command class/object methods ----------------------------------
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# This is a method just so it can be overridden if desired; it doesn't
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# actually use or change any attributes of the Distribution instance.
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def find_command_class (self, command):
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"""Given a command, derives the names of the module and class
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expected to implement the command: eg. 'foo_bar' becomes
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'distutils.command.foo_bar' (the module) and 'FooBar' (the
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class within that module). Loads the module, extracts the
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class from it, and returns the class object.
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Raises DistutilsModuleError with a semi-user-targeted error
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message if the expected module could not be loaded, or the
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expected class was not found in it."""
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module_name = 'distutils.command.' + command
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klass_name = command
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try:
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__import__ (module_name)
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module = sys.modules[module_name]
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except ImportError:
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raise DistutilsModuleError, \
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"invalid command '%s' (no module named '%s')" % \
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(command, module_name)
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try:
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klass = vars(module)[klass_name]
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except KeyError:
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raise DistutilsModuleError, \
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"invalid command '%s' (no class '%s' in module '%s')" \
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% (command, klass_name, module_name)
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return klass
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# find_command_class ()
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def create_command_obj (self, command):
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"""Figure out the class that should implement a command,
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instantiate it, cache and return the new "command object".
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The "command class" is determined either by looking it up in
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the 'cmdclass' attribute (this is the mechanism whereby
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clients may override default Distutils commands or add their
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own), or by calling the 'find_command_class()' method (if the
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command name is not in 'cmdclass'."""
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# Determine the command class -- either it's in the command_class
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# dictionary, or we have to divine the module and class name
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klass = self.cmdclass.get(command)
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if not klass:
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klass = self.find_command_class (command)
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self.cmdclass[command] = klass
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# Found the class OK -- instantiate it
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cmd_obj = klass (self)
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return cmd_obj
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def find_command_obj (self, command, create=1):
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"""Look up and return a command object in the cache maintained by
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'create_command_obj()'. If none found, the action taken
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depends on 'create': if true (the default), create a new
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command object by calling 'create_command_obj()' and return
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it; otherwise, return None. If 'command' is an invalid
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command name, then DistutilsModuleError will be raised."""
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cmd_obj = self.command_obj.get (command)
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if not cmd_obj and create:
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cmd_obj = self.create_command_obj (command)
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self.command_obj[command] = cmd_obj
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return cmd_obj
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# -- Methods that operate on the Distribution ----------------------
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def announce (self, msg, level=1):
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"""Print 'msg' if 'level' is greater than or equal to the verbosity
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|
level recorded in the 'verbose' attribute (which, currently,
|
|
can be only 0 or 1)."""
|
|
|
|
if self.verbose >= level:
|
|
print 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 'create_command_obj()'."""
|
|
|
|
for cmd in self.commands:
|
|
self.run_command (cmd)
|
|
|
|
|
|
def get_option (self, option):
|
|
"""Return the value of a distribution option. Raise
|
|
AttributeError if 'option' is not known."""
|
|
return getattr (self, opt)
|
|
|
|
|
|
def get_options (self, *options):
|
|
"""Return (as a tuple) the values of several distribution
|
|
options. Raise AttributeError if any element of
|
|
'options' is not known."""
|
|
|
|
values = []
|
|
for opt in options:
|
|
values.append (getattr (self, opt))
|
|
|
|
return tuple (values)
|
|
|
|
|
|
# -- 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
|
|
|
|
self.announce ("running " + command)
|
|
cmd_obj = self.find_command_obj (command)
|
|
cmd_obj.ensure_ready ()
|
|
cmd_obj.run ()
|
|
self.have_run[command] = 1
|
|
|
|
|
|
def get_command_option (self, command, option):
|
|
"""Create a command object for 'command' if necessary, ensure that
|
|
its option values are all set to their final values, and return
|
|
the value of its 'option' option. Raise AttributeError if
|
|
'option' is not known for that 'command'."""
|
|
|
|
cmd_obj = self.find_command_obj (command)
|
|
cmd_obj.ensure_ready ()
|
|
return cmd_obj.get_option (option)
|
|
|
|
|
|
def get_command_options (self, command, *options):
|
|
"""Create a command object for 'command' if necessary, ensure that
|
|
its option values are all set to their final values, and return
|
|
a tuple containing the values of all the options listed in
|
|
'options' for that command. Raise DistutilsOptionError if any
|
|
invalid option is supplied in 'options'."""
|
|
|
|
cmd_obj = self.find_command_obj (command)
|
|
cmd_obj.ensure_ready ()
|
|
values = []
|
|
for opt in options:
|
|
values.append (getattr (cmd_obj, option))
|
|
|
|
return tuple (values)
|
|
|
|
|
|
# -- 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 is_pure (self):
|
|
return (self.has_pure_modules() and
|
|
not self.has_ext_modules() and
|
|
not self.has_c_libraries())
|
|
|
|
# -- Metadata query methods ----------------------------------------
|
|
|
|
# If you're looking for 'get_name()', 'get_version()', and so forth,
|
|
# they are defined in a sneaky way: the constructor binds self.get_XXX
|
|
# to self.metadata.get_XXX. The actual code is in the
|
|
# DistributionMetadata class, below.
|
|
|
|
# class Distribution
|
|
|
|
|
|
class DistributionMetadata:
|
|
"""Dummy class to hold the distribution meta-data: name, version,
|
|
author, and so forth."""
|
|
|
|
def __init__ (self):
|
|
self.name = None
|
|
self.version = None
|
|
self.author = None
|
|
self.author_email = None
|
|
self.maintainer = None
|
|
self.maintainer_email = None
|
|
self.url = None
|
|
self.licence = None
|
|
self.description = None
|
|
|
|
# -- Metadata query methods ----------------------------------------
|
|
|
|
def get_name (self):
|
|
return self.name or "UNKNOWN"
|
|
|
|
def get_version(self):
|
|
return self.version or "???"
|
|
|
|
def get_fullname (self):
|
|
return "%s-%s" % (self.get_name(), self.get_version())
|
|
|
|
def get_author(self):
|
|
return self.author or "UNKNOWN"
|
|
|
|
def get_author_email(self):
|
|
return self.author_email or "UNKNOWN"
|
|
|
|
def get_maintainer(self):
|
|
return self.maintainer or "UNKNOWN"
|
|
|
|
def get_maintainer_email(self):
|
|
return self.maintainer_email or "UNKNOWN"
|
|
|
|
def get_contact(self):
|
|
return (self.maintainer or
|
|
self.author or
|
|
"UNKNOWN")
|
|
|
|
def get_contact_email(self):
|
|
return (self.maintainer_email or
|
|
self.author_email or
|
|
"UNKNOWN")
|
|
|
|
def get_url(self):
|
|
return self.url or "UNKNOWN"
|
|
|
|
def get_licence(self):
|
|
return self.licence or "UNKNOWN"
|
|
|
|
def get_description(self):
|
|
return self.description or "UNKNOWN"
|
|
|
|
# class DistributionMetadata
|
|
|
|
if __name__ == "__main__":
|
|
dist = Distribution ()
|
|
print "ok"
|