mirror of
https://github.com/tahoe-lafs/tahoe-lafs.git
synced 2024-12-22 22:32:23 +00:00
862 lines
29 KiB
Python
862 lines
29 KiB
Python
__all__ = ['Distribution']
|
|
|
|
from distutils.core import Distribution as _Distribution
|
|
from setuptools.depends import Require
|
|
from setuptools.command.install import install
|
|
from setuptools.command.sdist import sdist
|
|
from setuptools.command.install_lib import install_lib
|
|
from distutils.errors import DistutilsOptionError, DistutilsPlatformError
|
|
from distutils.errors import DistutilsSetupError
|
|
import setuptools, pkg_resources, distutils.core, distutils.dist, distutils.cmd
|
|
import os, distutils.log, re
|
|
|
|
def _get_unpatched(cls):
|
|
"""Protect against re-patching the distutils if reloaded
|
|
|
|
Also ensures that no other distutils extension monkeypatched the distutils
|
|
first.
|
|
"""
|
|
while cls.__module__.startswith('setuptools'):
|
|
cls, = cls.__bases__
|
|
if not cls.__module__.startswith('distutils'):
|
|
raise AssertionError(
|
|
"distutils has already been patched by %r" % cls
|
|
)
|
|
return cls
|
|
|
|
_Distribution = _get_unpatched(_Distribution)
|
|
|
|
sequence = tuple, list
|
|
|
|
def check_importable(dist, attr, value):
|
|
try:
|
|
ep = pkg_resources.EntryPoint.parse('x='+value)
|
|
assert not ep.extras
|
|
except (TypeError,ValueError,AttributeError,AssertionError):
|
|
raise DistutilsSetupError(
|
|
"%r must be importable 'module:attrs' string (got %r)"
|
|
% (attr,value)
|
|
)
|
|
|
|
|
|
def assert_string_list(dist, attr, value):
|
|
"""Verify that value is a string list or None"""
|
|
try:
|
|
assert ''.join(value)!=value
|
|
except (TypeError,ValueError,AttributeError,AssertionError):
|
|
raise DistutilsSetupError(
|
|
"%r must be a list of strings (got %r)" % (attr,value)
|
|
)
|
|
|
|
def check_nsp(dist, attr, value):
|
|
"""Verify that namespace packages are valid"""
|
|
assert_string_list(dist,attr,value)
|
|
for nsp in value:
|
|
if not dist.has_contents_for(nsp):
|
|
raise DistutilsSetupError(
|
|
"Distribution contains no modules or packages for " +
|
|
"namespace package %r" % nsp
|
|
)
|
|
if '.' in nsp:
|
|
parent = '.'.join(nsp.split('.')[:-1])
|
|
if parent not in value:
|
|
distutils.log.warn(
|
|
"WARNING: %r is declared as a package namespace, but %r"
|
|
" is not: please correct this in setup.py", nsp, parent
|
|
)
|
|
|
|
def check_extras(dist, attr, value):
|
|
"""Verify that extras_require mapping is valid"""
|
|
try:
|
|
for k,v in value.items():
|
|
list(pkg_resources.parse_requirements(v))
|
|
except (TypeError,ValueError,AttributeError):
|
|
raise DistutilsSetupError(
|
|
"'extras_require' must be a dictionary whose values are "
|
|
"strings or lists of strings containing valid project/version "
|
|
"requirement specifiers."
|
|
)
|
|
|
|
|
|
|
|
|
|
def assert_bool(dist, attr, value):
|
|
"""Verify that value is True, False, 0, or 1"""
|
|
if bool(value) != value:
|
|
raise DistutilsSetupError(
|
|
"%r must be a boolean value (got %r)" % (attr,value)
|
|
)
|
|
def check_requirements(dist, attr, value):
|
|
"""Verify that install_requires is a valid requirements list"""
|
|
try:
|
|
list(pkg_resources.parse_requirements(value))
|
|
except (TypeError,ValueError):
|
|
raise DistutilsSetupError(
|
|
"%r must be a string or list of strings "
|
|
"containing valid project/version requirement specifiers" % (attr,)
|
|
)
|
|
def check_entry_points(dist, attr, value):
|
|
"""Verify that entry_points map is parseable"""
|
|
try:
|
|
pkg_resources.EntryPoint.parse_map(value)
|
|
except ValueError, e:
|
|
raise DistutilsSetupError(e)
|
|
|
|
def check_test_suite(dist, attr, value):
|
|
if not isinstance(value,basestring):
|
|
raise DistutilsSetupError("test_suite must be a string")
|
|
|
|
def check_package_data(dist, attr, value):
|
|
"""Verify that value is a dictionary of package names to glob lists"""
|
|
if isinstance(value,dict):
|
|
for k,v in value.items():
|
|
if not isinstance(k,str): break
|
|
try: iter(v)
|
|
except TypeError:
|
|
break
|
|
else:
|
|
return
|
|
raise DistutilsSetupError(
|
|
attr+" must be a dictionary mapping package names to lists of "
|
|
"wildcard patterns"
|
|
)
|
|
|
|
def check_packages(dist, attr, value):
|
|
for pkgname in value:
|
|
if not re.match(r'\w+(\.\w+)*', pkgname):
|
|
distutils.log.warn(
|
|
"WARNING: %r not a valid package name; please use only"
|
|
".-separated package names in setup.py", pkgname
|
|
)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class Distribution(_Distribution):
|
|
"""Distribution with support for features, tests, and package data
|
|
|
|
This is an enhanced version of 'distutils.dist.Distribution' that
|
|
effectively adds the following new optional keyword arguments to 'setup()':
|
|
|
|
'install_requires' -- a string or sequence of strings specifying project
|
|
versions that the distribution requires when installed, in the format
|
|
used by 'pkg_resources.require()'. They will be installed
|
|
automatically when the package is installed. If you wish to use
|
|
packages that are not available in PyPI, or want to give your users an
|
|
alternate download location, you can add a 'find_links' option to the
|
|
'[easy_install]' section of your project's 'setup.cfg' file, and then
|
|
setuptools will scan the listed web pages for links that satisfy the
|
|
requirements.
|
|
|
|
'extras_require' -- a dictionary mapping names of optional "extras" to the
|
|
additional requirement(s) that using those extras incurs. For example,
|
|
this::
|
|
|
|
extras_require = dict(reST = ["docutils>=0.3", "reSTedit"])
|
|
|
|
indicates that the distribution can optionally provide an extra
|
|
capability called "reST", but it can only be used if docutils and
|
|
reSTedit are installed. If the user installs your package using
|
|
EasyInstall and requests one of your extras, the corresponding
|
|
additional requirements will be installed if needed.
|
|
|
|
'features' -- a dictionary mapping option names to 'setuptools.Feature'
|
|
objects. Features are a portion of the distribution that can be
|
|
included or excluded based on user options, inter-feature dependencies,
|
|
and availability on the current system. Excluded features are omitted
|
|
from all setup commands, including source and binary distributions, so
|
|
you can create multiple distributions from the same source tree.
|
|
Feature names should be valid Python identifiers, except that they may
|
|
contain the '-' (minus) sign. Features can be included or excluded
|
|
via the command line options '--with-X' and '--without-X', where 'X' is
|
|
the name of the feature. Whether a feature is included by default, and
|
|
whether you are allowed to control this from the command line, is
|
|
determined by the Feature object. See the 'Feature' class for more
|
|
information.
|
|
|
|
'test_suite' -- the name of a test suite to run for the 'test' command.
|
|
If the user runs 'python setup.py test', the package will be installed,
|
|
and the named test suite will be run. The format is the same as
|
|
would be used on a 'unittest.py' command line. That is, it is the
|
|
dotted name of an object to import and call to generate a test suite.
|
|
|
|
'package_data' -- a dictionary mapping package names to lists of filenames
|
|
or globs to use to find data files contained in the named packages.
|
|
If the dictionary has filenames or globs listed under '""' (the empty
|
|
string), those names will be searched for in every package, in addition
|
|
to any names for the specific package. Data files found using these
|
|
names/globs will be installed along with the package, in the same
|
|
location as the package. Note that globs are allowed to reference
|
|
the contents of non-package subdirectories, as long as you use '/' as
|
|
a path separator. (Globs are automatically converted to
|
|
platform-specific paths at runtime.)
|
|
|
|
In addition to these new keywords, this class also has several new methods
|
|
for manipulating the distribution's contents. For example, the 'include()'
|
|
and 'exclude()' methods can be thought of as in-place add and subtract
|
|
commands that add or remove packages, modules, extensions, and so on from
|
|
the distribution. They are used by the feature subsystem to configure the
|
|
distribution for the included and excluded features.
|
|
"""
|
|
|
|
_patched_dist = None
|
|
|
|
def patch_missing_pkg_info(self, attrs):
|
|
# Fake up a replacement for the data that would normally come from
|
|
# PKG-INFO, but which might not yet be built if this is a fresh
|
|
# checkout.
|
|
#
|
|
if not attrs or 'name' not in attrs or 'version' not in attrs:
|
|
return
|
|
key = pkg_resources.safe_name(str(attrs['name'])).lower()
|
|
dist = pkg_resources.working_set.by_key.get(key)
|
|
if dist is not None and not dist.has_metadata('PKG-INFO'):
|
|
dist._version = pkg_resources.safe_version(str(attrs['version']))
|
|
self._patched_dist = dist
|
|
|
|
def __init__ (self, attrs=None):
|
|
have_package_data = hasattr(self, "package_data")
|
|
if not have_package_data:
|
|
self.package_data = {}
|
|
self.require_features = []
|
|
self.features = {}
|
|
self.dist_files = []
|
|
self.patch_missing_pkg_info(attrs)
|
|
# Make sure we have any eggs needed to interpret 'attrs'
|
|
if attrs is not None:
|
|
self.dependency_links = attrs.pop('dependency_links', [])
|
|
assert_string_list(self,'dependency_links',self.dependency_links)
|
|
if attrs and 'setup_requires' in attrs:
|
|
self.fetch_build_eggs(attrs.pop('setup_requires'))
|
|
for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
|
|
if not hasattr(self,ep.name):
|
|
setattr(self,ep.name,None)
|
|
_Distribution.__init__(self,attrs)
|
|
if isinstance(self.metadata.version, (int,long,float)):
|
|
# Some people apparently take "version number" too literally :)
|
|
self.metadata.version = str(self.metadata.version)
|
|
|
|
def parse_command_line(self):
|
|
"""Process features after parsing command line options"""
|
|
result = _Distribution.parse_command_line(self)
|
|
if self.features:
|
|
self._finalize_features()
|
|
return result
|
|
|
|
def _feature_attrname(self,name):
|
|
"""Convert feature name to corresponding option attribute name"""
|
|
return 'with_'+name.replace('-','_')
|
|
|
|
def fetch_build_eggs(self, requires):
|
|
"""Resolve pre-setup requirements"""
|
|
from pkg_resources import working_set, parse_requirements
|
|
for dist in working_set.resolve(
|
|
parse_requirements(requires), installer=self.fetch_build_egg
|
|
):
|
|
working_set.add(dist)
|
|
|
|
def finalize_options(self):
|
|
_Distribution.finalize_options(self)
|
|
if self.features:
|
|
self._set_global_opts_from_features()
|
|
|
|
for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
|
|
value = getattr(self,ep.name,None)
|
|
if value is not None:
|
|
ep.require(installer=self.fetch_build_egg)
|
|
ep.load()(self, ep.name, value)
|
|
|
|
def fetch_build_egg(self, req):
|
|
"""Fetch an egg needed for building"""
|
|
try:
|
|
cmd = self._egg_fetcher
|
|
except AttributeError:
|
|
from setuptools.command.easy_install import easy_install
|
|
dist = self.__class__({'script_args':['easy_install']})
|
|
dist.parse_config_files()
|
|
opts = dist.get_option_dict('easy_install')
|
|
keep = (
|
|
'find_links', 'site_dirs', 'index_url', 'optimize',
|
|
'site_dirs', 'allow_hosts'
|
|
)
|
|
for key in opts.keys():
|
|
if key not in keep:
|
|
del opts[key] # don't use any other settings
|
|
if self.dependency_links:
|
|
links = self.dependency_links[:]
|
|
if 'find_links' in opts:
|
|
links = opts['find_links'][1].split() + links
|
|
opts['find_links'] = ('setup', links)
|
|
cmd = easy_install(
|
|
dist, args=["x"], install_dir=os.curdir, exclude_scripts=True,
|
|
always_copy=False, build_directory=None, editable=False,
|
|
upgrade=False, multi_version=True, no_report = True
|
|
)
|
|
cmd.ensure_finalized()
|
|
self._egg_fetcher = cmd
|
|
return cmd.easy_install(req)
|
|
|
|
def _set_global_opts_from_features(self):
|
|
"""Add --with-X/--without-X options based on optional features"""
|
|
|
|
go = []
|
|
no = self.negative_opt.copy()
|
|
|
|
for name,feature in self.features.items():
|
|
self._set_feature(name,None)
|
|
feature.validate(self)
|
|
|
|
if feature.optional:
|
|
descr = feature.description
|
|
incdef = ' (default)'
|
|
excdef=''
|
|
if not feature.include_by_default():
|
|
excdef, incdef = incdef, excdef
|
|
|
|
go.append(('with-'+name, None, 'include '+descr+incdef))
|
|
go.append(('without-'+name, None, 'exclude '+descr+excdef))
|
|
no['without-'+name] = 'with-'+name
|
|
|
|
self.global_options = self.feature_options = go + self.global_options
|
|
self.negative_opt = self.feature_negopt = no
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _finalize_features(self):
|
|
"""Add/remove features and resolve dependencies between them"""
|
|
|
|
# First, flag all the enabled items (and thus their dependencies)
|
|
for name,feature in self.features.items():
|
|
enabled = self.feature_is_included(name)
|
|
if enabled or (enabled is None and feature.include_by_default()):
|
|
feature.include_in(self)
|
|
self._set_feature(name,1)
|
|
|
|
# Then disable the rest, so that off-by-default features don't
|
|
# get flagged as errors when they're required by an enabled feature
|
|
for name,feature in self.features.items():
|
|
if not self.feature_is_included(name):
|
|
feature.exclude_from(self)
|
|
self._set_feature(name,0)
|
|
|
|
|
|
def get_command_class(self, command):
|
|
"""Pluggable version of get_command_class()"""
|
|
if command in self.cmdclass:
|
|
return self.cmdclass[command]
|
|
|
|
for ep in pkg_resources.iter_entry_points('distutils.commands',command):
|
|
ep.require(installer=self.fetch_build_egg)
|
|
self.cmdclass[command] = cmdclass = ep.load()
|
|
return cmdclass
|
|
else:
|
|
return _Distribution.get_command_class(self, command)
|
|
|
|
def print_commands(self):
|
|
for ep in pkg_resources.iter_entry_points('distutils.commands'):
|
|
if ep.name not in self.cmdclass:
|
|
try:
|
|
cmdclass = ep.load(False) # don't require extras, we're not running
|
|
self.cmdclass[ep.name] = cmdclass
|
|
except ImportError:
|
|
pass # see https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1405
|
|
return _Distribution.print_commands(self)
|
|
|
|
|
|
def _set_feature(self,name,status):
|
|
"""Set feature's inclusion status"""
|
|
setattr(self,self._feature_attrname(name),status)
|
|
|
|
def feature_is_included(self,name):
|
|
"""Return 1 if feature is included, 0 if excluded, 'None' if unknown"""
|
|
return getattr(self,self._feature_attrname(name))
|
|
|
|
def include_feature(self,name):
|
|
"""Request inclusion of feature named 'name'"""
|
|
|
|
if self.feature_is_included(name)==0:
|
|
descr = self.features[name].description
|
|
raise DistutilsOptionError(
|
|
descr + " is required, but was excluded or is not available"
|
|
)
|
|
self.features[name].include_in(self)
|
|
self._set_feature(name,1)
|
|
|
|
def include(self,**attrs):
|
|
"""Add items to distribution that are named in keyword arguments
|
|
|
|
For example, 'dist.exclude(py_modules=["x"])' would add 'x' to
|
|
the distribution's 'py_modules' attribute, if it was not already
|
|
there.
|
|
|
|
Currently, this method only supports inclusion for attributes that are
|
|
lists or tuples. If you need to add support for adding to other
|
|
attributes in this or a subclass, you can add an '_include_X' method,
|
|
where 'X' is the name of the attribute. The method will be called with
|
|
the value passed to 'include()'. So, 'dist.include(foo={"bar":"baz"})'
|
|
will try to call 'dist._include_foo({"bar":"baz"})', which can then
|
|
handle whatever special inclusion logic is needed.
|
|
"""
|
|
for k,v in attrs.items():
|
|
include = getattr(self, '_include_'+k, None)
|
|
if include:
|
|
include(v)
|
|
else:
|
|
self._include_misc(k,v)
|
|
|
|
def exclude_package(self,package):
|
|
"""Remove packages, modules, and extensions in named package"""
|
|
|
|
pfx = package+'.'
|
|
if self.packages:
|
|
self.packages = [
|
|
p for p in self.packages
|
|
if p!=package and not p.startswith(pfx)
|
|
]
|
|
|
|
if self.py_modules:
|
|
self.py_modules = [
|
|
p for p in self.py_modules
|
|
if p!=package and not p.startswith(pfx)
|
|
]
|
|
|
|
if self.ext_modules:
|
|
self.ext_modules = [
|
|
p for p in self.ext_modules
|
|
if p.name!=package and not p.name.startswith(pfx)
|
|
]
|
|
|
|
|
|
def has_contents_for(self,package):
|
|
"""Return true if 'exclude_package(package)' would do something"""
|
|
|
|
pfx = package+'.'
|
|
|
|
for p in self.iter_distribution_names():
|
|
if p==package or p.startswith(pfx):
|
|
return True
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _exclude_misc(self,name,value):
|
|
"""Handle 'exclude()' for list/tuple attrs without a special handler"""
|
|
if not isinstance(value,sequence):
|
|
raise DistutilsSetupError(
|
|
"%s: setting must be a list or tuple (%r)" % (name, value)
|
|
)
|
|
try:
|
|
old = getattr(self,name)
|
|
except AttributeError:
|
|
raise DistutilsSetupError(
|
|
"%s: No such distribution setting" % name
|
|
)
|
|
if old is not None and not isinstance(old,sequence):
|
|
raise DistutilsSetupError(
|
|
name+": this setting cannot be changed via include/exclude"
|
|
)
|
|
elif old:
|
|
setattr(self,name,[item for item in old if item not in value])
|
|
|
|
def _include_misc(self,name,value):
|
|
"""Handle 'include()' for list/tuple attrs without a special handler"""
|
|
|
|
if not isinstance(value,sequence):
|
|
raise DistutilsSetupError(
|
|
"%s: setting must be a list (%r)" % (name, value)
|
|
)
|
|
try:
|
|
old = getattr(self,name)
|
|
except AttributeError:
|
|
raise DistutilsSetupError(
|
|
"%s: No such distribution setting" % name
|
|
)
|
|
if old is None:
|
|
setattr(self,name,value)
|
|
elif not isinstance(old,sequence):
|
|
raise DistutilsSetupError(
|
|
name+": this setting cannot be changed via include/exclude"
|
|
)
|
|
else:
|
|
setattr(self,name,old+[item for item in value if item not in old])
|
|
|
|
def exclude(self,**attrs):
|
|
"""Remove items from distribution that are named in keyword arguments
|
|
|
|
For example, 'dist.exclude(py_modules=["x"])' would remove 'x' from
|
|
the distribution's 'py_modules' attribute. Excluding packages uses
|
|
the 'exclude_package()' method, so all of the package's contained
|
|
packages, modules, and extensions are also excluded.
|
|
|
|
Currently, this method only supports exclusion from attributes that are
|
|
lists or tuples. If you need to add support for excluding from other
|
|
attributes in this or a subclass, you can add an '_exclude_X' method,
|
|
where 'X' is the name of the attribute. The method will be called with
|
|
the value passed to 'exclude()'. So, 'dist.exclude(foo={"bar":"baz"})'
|
|
will try to call 'dist._exclude_foo({"bar":"baz"})', which can then
|
|
handle whatever special exclusion logic is needed.
|
|
"""
|
|
for k,v in attrs.items():
|
|
exclude = getattr(self, '_exclude_'+k, None)
|
|
if exclude:
|
|
exclude(v)
|
|
else:
|
|
self._exclude_misc(k,v)
|
|
|
|
def _exclude_packages(self,packages):
|
|
if not isinstance(packages,sequence):
|
|
raise DistutilsSetupError(
|
|
"packages: setting must be a list or tuple (%r)" % (packages,)
|
|
)
|
|
map(self.exclude_package, packages)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _parse_command_opts(self, parser, args):
|
|
# Remove --with-X/--without-X options when processing command args
|
|
self.global_options = self.__class__.global_options
|
|
self.negative_opt = self.__class__.negative_opt
|
|
|
|
# First, expand any aliases
|
|
command = args[0]
|
|
aliases = self.get_option_dict('aliases')
|
|
while command in aliases:
|
|
src,alias = aliases[command]
|
|
del aliases[command] # ensure each alias can expand only once!
|
|
import shlex
|
|
args[:1] = shlex.split(alias,True)
|
|
command = args[0]
|
|
|
|
nargs = _Distribution._parse_command_opts(self, parser, args)
|
|
|
|
# Handle commands that want to consume all remaining arguments
|
|
cmd_class = self.get_command_class(command)
|
|
if getattr(cmd_class,'command_consumes_arguments',None):
|
|
self.get_option_dict(command)['args'] = ("command line", nargs)
|
|
if nargs is not None:
|
|
return []
|
|
|
|
return nargs
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def get_cmdline_options(self):
|
|
"""Return a '{cmd: {opt:val}}' map of all command-line options
|
|
|
|
Option names are all long, but do not include the leading '--', and
|
|
contain dashes rather than underscores. If the option doesn't take
|
|
an argument (e.g. '--quiet'), the 'val' is 'None'.
|
|
|
|
Note that options provided by config files are intentionally excluded.
|
|
"""
|
|
|
|
d = {}
|
|
|
|
for cmd,opts in self.command_options.items():
|
|
|
|
for opt,(src,val) in opts.items():
|
|
|
|
if src != "command line":
|
|
continue
|
|
|
|
opt = opt.replace('_','-')
|
|
|
|
if val==0:
|
|
cmdobj = self.get_command_obj(cmd)
|
|
neg_opt = self.negative_opt.copy()
|
|
neg_opt.update(getattr(cmdobj,'negative_opt',{}))
|
|
for neg,pos in neg_opt.items():
|
|
if pos==opt:
|
|
opt=neg
|
|
val=None
|
|
break
|
|
else:
|
|
raise AssertionError("Shouldn't be able to get here")
|
|
|
|
elif val==1:
|
|
val = None
|
|
|
|
d.setdefault(cmd,{})[opt] = val
|
|
|
|
return d
|
|
|
|
|
|
def iter_distribution_names(self):
|
|
"""Yield all packages, modules, and extension names in distribution"""
|
|
|
|
for pkg in self.packages or ():
|
|
yield pkg
|
|
|
|
for module in self.py_modules or ():
|
|
yield module
|
|
|
|
for ext in self.ext_modules or ():
|
|
if isinstance(ext,tuple):
|
|
name, buildinfo = ext
|
|
else:
|
|
name = ext.name
|
|
if name.endswith('module'):
|
|
name = name[:-6]
|
|
yield name
|
|
|
|
# Install it throughout the distutils
|
|
for module in distutils.dist, distutils.core, distutils.cmd:
|
|
module.Distribution = Distribution
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class Feature:
|
|
"""A subset of the distribution that can be excluded if unneeded/wanted
|
|
|
|
Features are created using these keyword arguments:
|
|
|
|
'description' -- a short, human readable description of the feature, to
|
|
be used in error messages, and option help messages.
|
|
|
|
'standard' -- if true, the feature is included by default if it is
|
|
available on the current system. Otherwise, the feature is only
|
|
included if requested via a command line '--with-X' option, or if
|
|
another included feature requires it. The default setting is 'False'.
|
|
|
|
'available' -- if true, the feature is available for installation on the
|
|
current system. The default setting is 'True'.
|
|
|
|
'optional' -- if true, the feature's inclusion can be controlled from the
|
|
command line, using the '--with-X' or '--without-X' options. If
|
|
false, the feature's inclusion status is determined automatically,
|
|
based on 'availabile', 'standard', and whether any other feature
|
|
requires it. The default setting is 'True'.
|
|
|
|
'require_features' -- a string or sequence of strings naming features
|
|
that should also be included if this feature is included. Defaults to
|
|
empty list. May also contain 'Require' objects that should be
|
|
added/removed from the distribution.
|
|
|
|
'remove' -- a string or list of strings naming packages to be removed
|
|
from the distribution if this feature is *not* included. If the
|
|
feature *is* included, this argument is ignored. This argument exists
|
|
to support removing features that "crosscut" a distribution, such as
|
|
defining a 'tests' feature that removes all the 'tests' subpackages
|
|
provided by other features. The default for this argument is an empty
|
|
list. (Note: the named package(s) or modules must exist in the base
|
|
distribution when the 'setup()' function is initially called.)
|
|
|
|
other keywords -- any other keyword arguments are saved, and passed to
|
|
the distribution's 'include()' and 'exclude()' methods when the
|
|
feature is included or excluded, respectively. So, for example, you
|
|
could pass 'packages=["a","b"]' to cause packages 'a' and 'b' to be
|
|
added or removed from the distribution as appropriate.
|
|
|
|
A feature must include at least one 'requires', 'remove', or other
|
|
keyword argument. Otherwise, it can't affect the distribution in any way.
|
|
Note also that you can subclass 'Feature' to create your own specialized
|
|
feature types that modify the distribution in other ways when included or
|
|
excluded. See the docstrings for the various methods here for more detail.
|
|
Aside from the methods, the only feature attributes that distributions look
|
|
at are 'description' and 'optional'.
|
|
"""
|
|
def __init__(self, description, standard=False, available=True,
|
|
optional=True, require_features=(), remove=(), **extras
|
|
):
|
|
|
|
self.description = description
|
|
self.standard = standard
|
|
self.available = available
|
|
self.optional = optional
|
|
if isinstance(require_features,(str,Require)):
|
|
require_features = require_features,
|
|
|
|
self.require_features = [
|
|
r for r in require_features if isinstance(r,str)
|
|
]
|
|
er = [r for r in require_features if not isinstance(r,str)]
|
|
if er: extras['require_features'] = er
|
|
|
|
if isinstance(remove,str):
|
|
remove = remove,
|
|
self.remove = remove
|
|
self.extras = extras
|
|
|
|
if not remove and not require_features and not extras:
|
|
raise DistutilsSetupError(
|
|
"Feature %s: must define 'require_features', 'remove', or at least one"
|
|
" of 'packages', 'py_modules', etc."
|
|
)
|
|
|
|
def include_by_default(self):
|
|
"""Should this feature be included by default?"""
|
|
return self.available and self.standard
|
|
|
|
def include_in(self,dist):
|
|
|
|
"""Ensure feature and its requirements are included in distribution
|
|
|
|
You may override this in a subclass to perform additional operations on
|
|
the distribution. Note that this method may be called more than once
|
|
per feature, and so should be idempotent.
|
|
|
|
"""
|
|
|
|
if not self.available:
|
|
raise DistutilsPlatformError(
|
|
self.description+" is required,"
|
|
"but is not available on this platform"
|
|
)
|
|
|
|
dist.include(**self.extras)
|
|
|
|
for f in self.require_features:
|
|
dist.include_feature(f)
|
|
|
|
|
|
|
|
def exclude_from(self,dist):
|
|
|
|
"""Ensure feature is excluded from distribution
|
|
|
|
You may override this in a subclass to perform additional operations on
|
|
the distribution. This method will be called at most once per
|
|
feature, and only after all included features have been asked to
|
|
include themselves.
|
|
"""
|
|
|
|
dist.exclude(**self.extras)
|
|
|
|
if self.remove:
|
|
for item in self.remove:
|
|
dist.exclude_package(item)
|
|
|
|
|
|
|
|
def validate(self,dist):
|
|
|
|
"""Verify that feature makes sense in context of distribution
|
|
|
|
This method is called by the distribution just before it parses its
|
|
command line. It checks to ensure that the 'remove' attribute, if any,
|
|
contains only valid package/module names that are present in the base
|
|
distribution when 'setup()' is called. You may override it in a
|
|
subclass to perform any other required validation of the feature
|
|
against a target distribution.
|
|
"""
|
|
|
|
for item in self.remove:
|
|
if not dist.has_contents_for(item):
|
|
raise DistutilsSetupError(
|
|
"%s wants to be able to remove %s, but the distribution"
|
|
" doesn't contain any packages or modules under %s"
|
|
% (self.description, item, item)
|
|
)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|