cpython/Lib/packaging/run.py

664 lines
22 KiB
Python

"""Main command line parser. Implements the pysetup script."""
import os
import re
import sys
import getopt
import logging
from packaging import logger
from packaging.dist import Distribution
from packaging.util import _is_archive_file, generate_setup_py
from packaging.command import get_command_class, STANDARD_COMMANDS
from packaging.install import install, install_local_project, remove
from packaging.database import get_distribution, get_distributions
from packaging.depgraph import generate_graph
from packaging.fancy_getopt import FancyGetopt
from packaging.errors import (PackagingArgError, PackagingError,
PackagingModuleError, PackagingClassError,
CCompilerError)
command_re = re.compile(r'^[a-zA-Z]([a-zA-Z0-9_]*)$')
common_usage = """\
Actions:
%(actions)s
To get more help on an action, use:
pysetup action --help
"""
global_options = [
# The fourth entry for verbose means that it can be repeated.
('verbose', 'v', "run verbosely (default)", True),
('quiet', 'q', "run quietly (turns verbosity off)"),
('dry-run', 'n', "don't actually do anything"),
('help', 'h', "show detailed help message"),
('no-user-cfg', None, 'ignore pydistutils.cfg in your home directory'),
('version', None, 'Display the version'),
]
negative_opt = {'quiet': 'verbose'}
display_options = [
('help-commands', None, "list all available commands"),
]
display_option_names = [x[0].replace('-', '_') for x in display_options]
def _parse_args(args, options, long_options):
"""Transform sys.argv input into a dict.
:param args: the args to parse (i.e sys.argv)
:param options: the list of options to pass to getopt
:param long_options: the list of string with the names of the long options
to be passed to getopt.
The function returns a dict with options/long_options as keys and matching
values as values.
"""
optlist, args = getopt.gnu_getopt(args, options, long_options)
optdict = {}
optdict['args'] = args
for k, v in optlist:
k = k.lstrip('-')
if k not in optdict:
optdict[k] = []
if v:
optdict[k].append(v)
else:
optdict[k].append(v)
return optdict
class action_help:
"""Prints a help message when the standard help flags: -h and --help
are used on the commandline.
"""
def __init__(self, help_msg):
self.help_msg = help_msg
def __call__(self, f):
def wrapper(*args, **kwargs):
f_args = args[1]
if '--help' in f_args or '-h' in f_args:
print(self.help_msg)
return
return f(*args, **kwargs)
return wrapper
@action_help("""\
Usage: pysetup create
or: pysetup create --help
Create a new Python project.
""")
def _create(distpatcher, args, **kw):
from packaging.create import main
return main()
@action_help("""\
Usage: pysetup generate-setup
or: pysetup generate-setup --help
Generate a setup.py script for backward-compatibility purposes.
""")
def _generate(distpatcher, args, **kw):
generate_setup_py()
logger.info('The setup.py was generated')
@action_help("""\
Usage: pysetup graph dist
or: pysetup graph --help
Print dependency graph for the distribution.
positional arguments:
dist installed distribution name
""")
def _graph(dispatcher, args, **kw):
name = args[1]
dist = get_distribution(name, use_egg_info=True)
if dist is None:
logger.warning('Distribution not found.')
return 1
else:
dists = get_distributions(use_egg_info=True)
graph = generate_graph(dists)
print(graph.repr_node(dist))
@action_help("""\
Usage: pysetup install [dist]
or: pysetup install [archive]
or: pysetup install [src_dir]
or: pysetup install --help
Install a Python distribution from the indexes, source directory, or sdist.
positional arguments:
archive path to source distribution (zip, tar.gz)
dist distribution name to install from the indexes
scr_dir path to source directory
""")
def _install(dispatcher, args, **kw):
# first check if we are in a source directory
if len(args) < 2:
# are we inside a project dir?
if os.path.isfile('setup.cfg') or os.path.isfile('setup.py'):
args.insert(1, os.getcwd())
else:
logger.warning('No project to install.')
return 1
target = args[1]
# installing from a source dir or archive file?
if os.path.isdir(target) or _is_archive_file(target):
return not install_local_project(target)
else:
# download from PyPI
return not install(target)
@action_help("""\
Usage: pysetup metadata [dist]
or: pysetup metadata [dist] [-f field ...]
or: pysetup metadata --help
Print metadata for the distribution.
positional arguments:
dist installed distribution name
optional arguments:
-f metadata field to print; omit to get all fields
""")
def _metadata(dispatcher, args, **kw):
opts = _parse_args(args[1:], 'f:', [])
if opts['args']:
name = opts['args'][0]
dist = get_distribution(name, use_egg_info=True)
if dist is None:
logger.warning('%r not installed', name)
return 1
elif os.path.isfile('setup.cfg'):
logger.info('searching local dir for metadata')
dist = Distribution() # XXX use config module
dist.parse_config_files()
else:
logger.warning('no argument given and no local setup.cfg found')
return 1
metadata = dist.metadata
if 'f' in opts:
keys = (k for k in opts['f'] if k in metadata)
else:
keys = metadata.keys()
for key in keys:
if key in metadata:
print(metadata._convert_name(key) + ':')
value = metadata[key]
if isinstance(value, list):
for v in value:
print(' ', v)
else:
print(' ', value.replace('\n', '\n '))
@action_help("""\
Usage: pysetup remove dist [-y]
or: pysetup remove --help
Uninstall a Python distribution.
positional arguments:
dist installed distribution name
optional arguments:
-y auto confirm distribution removal
""")
def _remove(distpatcher, args, **kw):
opts = _parse_args(args[1:], 'y', [])
if 'y' in opts:
auto_confirm = True
else:
auto_confirm = False
retcode = 0
for dist in set(opts['args']):
try:
remove(dist, auto_confirm=auto_confirm)
except PackagingError:
logger.warning('%r not installed', dist)
retcode = 1
return retcode
@action_help("""\
Usage: pysetup run [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
or: pysetup run --help
or: pysetup run --list-commands
or: pysetup run cmd --help
""")
def _run(dispatcher, args, **kw):
parser = dispatcher.parser
args = args[1:]
commands = STANDARD_COMMANDS # FIXME display extra commands
if args == ['--list-commands']:
print('List of available commands:')
for cmd in commands:
cls = dispatcher.cmdclass.get(cmd) or get_command_class(cmd)
desc = getattr(cls, 'description', '(no description available)')
print(' %s: %s' % (cmd, desc))
return
while args:
args = dispatcher._parse_command_opts(parser, args)
if args is None:
return
# create the Distribution class
# need to feed setup.cfg here !
dist = Distribution()
# Find and parse the config file(s): they will override options from
# the setup script, but be overridden by the command line.
# XXX still need to be extracted from Distribution
dist.parse_config_files()
for cmd in dispatcher.commands:
# FIXME need to catch MetadataMissingError here (from the check command
# e.g.)--or catch any exception, print an error message and exit with 1
dist.run_command(cmd, dispatcher.command_options[cmd])
return 0
@action_help("""\
Usage: pysetup list [dist ...]
or: pysetup list --help
Print name, version and location for the matching installed distributions.
positional arguments:
dist installed distribution name; omit to get all distributions
""")
def _list(dispatcher, args, **kw):
opts = _parse_args(args[1:], '', [])
dists = get_distributions(use_egg_info=True)
if opts['args']:
results = (d for d in dists if d.name.lower() in opts['args'])
listall = False
else:
results = dists
listall = True
number = 0
for dist in results:
print('%r %s (from %r)' % (dist.name, dist.version, dist.path))
number += 1
if number == 0:
if listall:
logger.info('Nothing seems to be installed.')
else:
logger.warning('No matching distribution found.')
return 1
else:
logger.info('Found %d projects installed.', number)
@action_help("""\
Usage: pysetup search [project] [--simple [url]] [--xmlrpc [url] [--fieldname value ...] --operator or|and]
or: pysetup search --help
Search the indexes for the matching projects.
positional arguments:
project the project pattern to search for
optional arguments:
--xmlrpc [url] whether to use the xmlrpc index or not. If an url is
specified, it will be used rather than the default one.
--simple [url] whether to use the simple index or not. If an url is
specified, it will be used rather than the default one.
--fieldname value Make a search on this field. Can only be used if
--xmlrpc has been selected or is the default index.
--operator or|and Defines what is the operator to use when doing xmlrpc
searchs with multiple fieldnames. Can only be used if
--xmlrpc has been selected or is the default index.
""")
def _search(dispatcher, args, **kw):
"""The search action.
It is able to search for a specific index (specified with --index), using
the simple or xmlrpc index types (with --type xmlrpc / --type simple)
"""
#opts = _parse_args(args[1:], '', ['simple', 'xmlrpc'])
# 1. what kind of index is requested ? (xmlrpc / simple)
logger.error('not implemented')
return 1
actions = [
('run', 'Run one or several commands', _run),
('metadata', 'Display the metadata of a project', _metadata),
('install', 'Install a project', _install),
('remove', 'Remove a project', _remove),
('search', 'Search for a project in the indexes', _search),
('list', 'List installed projects', _list),
('graph', 'Display a graph', _graph),
('create', 'Create a project', _create),
('generate-setup', 'Generate a backward-compatible setup.py', _generate),
]
class Dispatcher:
"""Reads the command-line options
"""
def __init__(self, args=None):
self.verbose = 1
self.dry_run = False
self.help = False
self.cmdclass = {}
self.commands = []
self.command_options = {}
for attr in display_option_names:
setattr(self, attr, False)
self.parser = FancyGetopt(global_options + display_options)
self.parser.set_negative_aliases(negative_opt)
# FIXME this parses everything, including command options (e.g. "run
# build -i" errors with "option -i not recognized")
args = self.parser.getopt(args=args, object=self)
# if first arg is "run", we have some commands
if len(args) == 0:
self.action = None
else:
self.action = args[0]
allowed = [action[0] for action in actions] + [None]
if self.action not in allowed:
msg = 'Unrecognized action "%s"' % self.action
raise PackagingArgError(msg)
self._set_logger()
self.args = args
# for display options we return immediately
if self.help or self.action is None:
self._show_help(self.parser, display_options_=False)
def _set_logger(self):
# setting up the logging level from the command-line options
# -q gets warning, error and critical
if self.verbose == 0:
level = logging.WARNING
# default level or -v gets info too
# XXX there's a bug somewhere: the help text says that -v is default
# (and verbose is set to 1 above), but when the user explicitly gives
# -v on the command line, self.verbose is incremented to 2! Here we
# compensate for that (I tested manually). On a related note, I think
# it's a good thing to use -q/nothing/-v/-vv on the command line
# instead of logging constants; it will be easy to add support for
# logging configuration in setup.cfg for advanced users. --merwok
elif self.verbose in (1, 2):
level = logging.INFO
else: # -vv and more for debug
level = logging.DEBUG
# setting up the stream handler
handler = logging.StreamHandler(sys.stderr)
handler.setLevel(level)
logger.addHandler(handler)
logger.setLevel(level)
def _parse_command_opts(self, parser, args):
# 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 %r" % (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 = get_command_class(command)
except PackagingModuleError as msg:
raise PackagingArgError(msg)
# XXX We want to push this in packaging.command
#
# Require that the command class be derived from Command -- want
# to be sure that the basic "command" interface is implemented.
for meth in ('initialize_options', 'finalize_options', 'run'):
if hasattr(cmd_class, meth):
continue
raise PackagingClassError(
'command %r must implement %r' % (cmd_class, meth))
# Also make sure that the command object provides a list of its
# known options.
if not (hasattr(cmd_class, 'user_options') and
isinstance(cmd_class.user_options, list)):
raise PackagingClassError(
"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 = negative_opt.copy()
if hasattr(cmd_class, 'negative_opt'):
_negative_opt.update(cmd_class.negative_opt)
# Check for help_options in command class. They have a different
# format (tuple of four) so we need to preprocess them here.
if (hasattr(cmd_class, 'help_options') and
isinstance(cmd_class.help_options, list)):
help_options = cmd_class.help_options[:]
else:
help_options = []
# All commands support the global options too, just by adding
# in 'global_options'.
parser.set_option_table(global_options +
cmd_class.user_options +
help_options)
parser.set_negative_aliases(_negative_opt)
args, opts = parser.getopt(args[1:])
if hasattr(opts, 'help') and opts.help:
self._show_command_help(cmd_class)
return
if (hasattr(cmd_class, 'help_options') and
isinstance(cmd_class.help_options, list)):
help_option_found = False
for help_option, short, desc, func in cmd_class.help_options:
if hasattr(opts, help_option.replace('-', '_')):
help_option_found = True
if callable(func):
func()
else:
raise PackagingClassError(
"invalid help function %r for help option %r: "
"must be a callable object (function, etc.)"
% (func, help_option))
if help_option_found:
return
# Put the options from the command line into their official
# holding pen, the 'command_options' dictionary.
opt_dict = self.get_option_dict(command)
for name, value in vars(opts).items():
opt_dict[name] = ("command line", value)
return args
def get_option_dict(self, command):
"""Get the option dictionary for a given command. If that
command's option dictionary hasn't been created yet, then create it
and return the new dictionary; otherwise, return the existing
option dictionary.
"""
d = self.command_options.get(command)
if d is None:
d = self.command_options[command] = {}
return d
def show_help(self):
self._show_help(self.parser)
def print_usage(self, parser):
parser.set_option_table(global_options)
actions_ = [' %s: %s' % (name, desc) for name, desc, __ in actions]
usage = common_usage % {'actions': '\n'.join(actions_)}
parser.print_help(usage + "\nGlobal options:")
def _show_help(self, parser, global_options_=True, display_options_=True,
commands=[]):
# late import because of mutual dependence between these modules
from packaging.command.cmd import Command
print('Usage: pysetup [options] action [action_options]')
print()
if global_options_:
self.print_usage(self.parser)
print()
if display_options_:
parser.set_option_table(display_options)
parser.print_help(
"Information display options (just display " +
"information, ignore any commands)")
print()
for command in commands:
if isinstance(command, type) and issubclass(command, Command):
cls = command
else:
cls = get_command_class(command)
if (hasattr(cls, 'help_options') and
isinstance(cls.help_options, list)):
parser.set_option_table(cls.user_options + cls.help_options)
else:
parser.set_option_table(cls.user_options)
parser.print_help("Options for %r command:" % cls.__name__)
print()
def _show_command_help(self, command):
if isinstance(command, str):
command = get_command_class(command)
desc = getattr(command, 'description', '(no description available)')
print('Description:', desc)
print()
if (hasattr(command, 'help_options') and
isinstance(command.help_options, list)):
self.parser.set_option_table(command.user_options +
command.help_options)
else:
self.parser.set_option_table(command.user_options)
self.parser.print_help("Options:")
print()
def _get_command_groups(self):
"""Helper function to retrieve all the command class names divided
into standard commands (listed in
packaging.command.STANDARD_COMMANDS) and extra commands (given in
self.cmdclass and not standard commands).
"""
extra_commands = [cmd for cmd in self.cmdclass
if cmd not in STANDARD_COMMANDS]
return STANDARD_COMMANDS, extra_commands
def print_commands(self):
"""Print out a help message listing all available commands with a
description of each. The list is divided into standard commands
(listed in packaging.command.STANDARD_COMMANDS) and extra commands
(given in self.cmdclass and not standard commands). The
descriptions come from the command class attribute
'description'.
"""
std_commands, extra_commands = self._get_command_groups()
max_length = max(len(command)
for commands in (std_commands, extra_commands)
for command in commands)
self.print_command_list(std_commands, "Standard commands", max_length)
if extra_commands:
print()
self.print_command_list(extra_commands, "Extra commands",
max_length)
def print_command_list(self, commands, header, max_length):
"""Print a subset of the list of all commands -- used by
'print_commands()'.
"""
print(header + ":")
for cmd in commands:
cls = self.cmdclass.get(cmd) or get_command_class(cmd)
description = getattr(cls, 'description',
'(no description available)')
print(" %-*s %s" % (max_length, cmd, description))
def __call__(self):
if self.action is None:
return
for action, desc, func in actions:
if action == self.action:
return func(self, self.args)
return -1
def main(args=None):
old_level = logger.level
old_handlers = list(logger.handlers)
try:
dispatcher = Dispatcher(args)
if dispatcher.action is None:
return
return dispatcher()
except KeyboardInterrupt:
logger.info('interrupted')
return 1
except (IOError, os.error, PackagingError, CCompilerError) as exc:
logger.exception(exc)
return 1
finally:
logger.setLevel(old_level)
logger.handlers[:] = old_handlers
if __name__ == '__main__':
sys.exit(main())