def parse_command_line(self):
"""Parse the setup script's command line, taken from the
'script_args' instance attribute (which defaults to 'sys.argv[1:]'
-- see 'setup()' in run.py). This list is first processed for
"global options" -- options that set attributes of the Distribution
instance. Then, it is alternately scanned for Packaging 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 PackagingGetoptError; any error on the
command line raises PackagingArgError. If no Packaging commands
were found on the command line, raises PackagingArgError. Return
true if command line was successfully parsed and we should carry
on with executing commands; false if no errors but we shouldn't
execute commands (currently, this only happens if user asks for
help).
"""
#
# We now have enough information to show the Macintosh dialog
# that allows the user to interactively specify the "command line".
#
toplevel_options = self._get_toplevel_options()
# We have to parse the command line a bit at a time -- global
# options, then the first command, then its options, and so on --
# because each command will be handled by a different class, and
# the options that are valid for a particular class aren't known
# until we have loaded the command class, which doesn't happen
# until we know what the command is.
self.commands = []
parser = FancyGetopt(toplevel_options + self.display_options)
parser.set_negative_aliases(self.negative_opt)
args = parser.getopt(args=self.script_args, 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.
# "pysetup run --help" and "pysetup run --help command ...". For the
# former, we show global options (--dry-run, etc.)
# and display-only options (--name, --version, etc.); for the
# latter, we omit the display-only options and show help for
# each command listed on the command line.
if self.help:
self._show_help(parser,
display_options=len(self.commands) == 0,
commands=self.commands)
return
return True
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