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|
"""distutils.dist
Provides the Distribution class, which represents the module distribution
being built/installed/distributed."""
# created 2000/04/03, Greg Ward
# (extricated from core.py; actually dates back to the beginning)
__revision__ = "$Id$"
import sys, os, string, re
from types import *
from copy import copy
from distutils.errors import *
from distutils import sysconfig
from distutils.fancy_getopt import FancyGetopt, longopt_xlate
from distutils.util import check_environ
# 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.
Clients will almost never instantiate Distribution directly,
unless the 'setup' function is totally inadequate to their needs.
However, it is conceivable that a client 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: it must have a constructor and methods
'parse_command_line()' and 'run_commands()' with signatures like
those described below."""
# '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.
global_options = [('verbose', 'v', "run verbosely (default)"),
('quiet', 'q', "run quietly (turns verbosity off)"),
('dry-run', 'n', "don't actually do anything"),
('help', 'h', "show detailed help message"),
]
# 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"),
('licence', None,
"print the licence of the package"),
('license', None,
"alias for --licence"),
('description', None,
"print the package description"),
('long-description', None,
"print the long package description"),
]
display_option_names = map(lambda x: string.translate(x[0], longopt_xlate),
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 uses '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 ()
method_basenames = dir(self.metadata) + \
['fullname', 'contact', 'contact_email']
for basename in 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_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 = {}
# 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_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 succesfully 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)
# 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, key):
setattr (self.metadata, key, val)
elif hasattr (self, key):
setattr (self, key, val)
else:
raise DistutilsSetupError, \
"invalid distribution option '%s'" % key
# __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
# -- 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).
On Unix, there are three possible config files: pydistutils.cfg in
the Distutils installation directory (ie. where the top-level
Distutils __inst__.py file lives), .pydistutils.cfg in the user's
home directory, and setup.cfg in the current directory.
On Windows and Mac OS, there are two possible config files:
pydistutils.cfg in the Python installation directory (sys.prefix)
and setup.cfg in the current directory.
"""
files = []
if os.name == "posix":
check_environ()
sys_dir = os.path.dirname(sys.modules['distutils'].__file__)
sys_file = os.path.join(sys_dir, "pydistutils.cfg")
if os.path.isfile(sys_file):
files.append(sys_file)
user_file = os.path.join(os.environ.get('HOME'),
".pydistutils.cfg")
if os.path.isfile(user_file):
files.append(user_file)
else:
sys_file = os.path.join (sysconfig.PREFIX, "pydistutils.cfg")
if os.path.isfile(sys_file):
files.append(sys_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()
print "Distribution.parse_config_files():"
parser = ConfigParser()
for filename in filenames:
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__':
opt_dict[opt] = (filename, parser.get(section,opt))
# Make the ConfigParser forget everything (so we retain
# the original filenames that options come from) -- gag,
# retch, puke -- another good reason for a distutils-
# specific config parser (sigh...)
parser.__init__()
# -- Command-line parsing methods ----------------------------------
def parse_command_line (self, args):
"""Parse the setup script's command line. 'args' must be a list
of command-line arguments, most likely 'sys.argv[1:]' (see the
'setup()' function). 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 were
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 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 (self.global_options + self.display_options)
parser.set_negative_aliases (self.negative_opt)
parser.set_aliases ({'license': 'licence'})
args = parser.getopt (object=self)
option_order = parser.get_option_order()
# 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:
print "showing 'global' help; commands=", self.commands
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 _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.
if not (hasattr (cmd_class, 'user_options') and
type (cmd_class.user_options) is ListType):
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 = copy (negative_opt)
negative_opt.update (cmd_class.negative_opt)
# All commands support the global options too, just by adding
# in 'global_options'.
parser.set_option_table (self.global_options +
cmd_class.user_options)
parser.set_negative_aliases (negative_opt)
(args, opts) = parser.getopt (args[1:])
if hasattr(opts, 'help') and opts.help:
print "showing help for command", cmd_class
self._show_help(parser, display_options=0, commands=[cmd_class])
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
# _parse_command_opts ()
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 distutils.core import usage
from distutils.cmd import Command
if global_options:
parser.set_option_table (self.global_options)
parser.print_help ("Global 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 type(command) is ClassType and issubclass(klass, Command):
klass = command
else:
klass = self.get_command_class (command)
parser.set_option_table (klass.user_options)
parser.print_help ("Options for '%s' command:" % klass.__name__)
print
print usage
return
# _show_help ()
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 distutils.core import 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 usage
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 = string.translate (opt, longopt_xlate)
print getattr(self.metadata, "get_"+opt)()
any_display_options = 1
return any_display_options
# handle_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:
klass = self.cmdclass.get (cmd)
if not klass:
klass = self.get_command_class (cmd)
try:
description = klass.description
except AttributeError:
description = "(no description available)"
print " %-*s %s" % (max_length, cmd, description)
# print_command_list ()
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 distutils.command.__all__) and "extra commands"
(mentioned in self.cmdclass, but not a standard command). The
descriptions come from the command class attribute
'description'.
"""
import distutils.command
std_commands = distutils.command.__all__
is_std = {}
for cmd in std_commands:
is_std[cmd] = 1
extra_commands = []
for cmd in self.cmdclass.keys():
if not is_std.get(cmd):
extra_commands.append (cmd)
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)
# print_commands ()
# -- Command class/object methods ----------------------------------
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.
"""
klass = self.cmdclass.get(command)
if klass:
return klass
module_name = 'distutils.command.' + command
klass_name = command
try:
__import__ (module_name)
module = sys.modules[module_name]
except ImportError:
raise DistutilsModuleError, \
"invalid command '%s' (no module named '%s')" % \
(command, module_name)
try:
klass = getattr(module, klass_name)
except AttributeError:
raise DistutilsModuleError, \
"invalid command '%s' (no class '%s' in module '%s')" \
% (command, klass_name, module_name)
self.cmdclass[command] = klass
return klass
# get_command_class ()
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 comand
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:
print "Distribution.get_command_obj(): " \
"creating '%s' command object" % command
klass = self.get_command_class(command)
cmd_obj = self.command_obj[command] = klass(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:
print " setting options:"
for (option, (source, value)) in options.items():
print " %s = %s (from %s)" % (option, value, source)
if not hasattr(cmd_obj, option):
raise DistutilsOptionError, \
("%s: command '%s' has no such option '%s'") % \
(source, command, option)
setattr(cmd_obj, option, value)
return cmd_obj
# -- Methods that operate on the Distribution ----------------------
def announce (self, msg, level=1):
"""Print 'msg' if 'level' is greater than or equal to the verbosity
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 '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
self.announce ("running " + command)
cmd_obj = self.get_command_obj (command)
cmd_obj.ensure_ready ()
cmd_obj.run ()
self.have_run[command] = 1
# -- 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())
# -- 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
self.long_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"
def get_long_description(self):
return self.long_description or "UNKNOWN"
# class DistributionMetadata
if __name__ == "__main__":
dist = Distribution ()
print "ok"
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