+# Copyright (C) 2010-2012 W. Trevor King <wking@tremily.us>
+#
+# This file is part of Hooke.
+#
+# Hooke is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# Hooke is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with Hooke. If not, see <http://www.gnu.org/licenses/>.
+
+"""Defines :class:`CommandLine` for driving Hooke from the command
+line.
+"""
+
+import codecs
+import cmd
+import logging
+import optparse
+import pprint
+try:
+ import readline # including readline makes cmd.Cmd.cmdloop() smarter
+except ImportError, e:
+ import logging
+ logging.warn('could not import readline, bash-like line editing disabled.')
+import shlex
+import sys
+
+from ..command import CommandExit, Exit, Command, Argument, StoreValue
+from ..engine import CommandMessage, CloseEngine
+from ..interaction import EOFResponse, Request, ReloadUserInterfaceConfig
from ..ui import UserInterface
+from ..util.convert import from_string
+from ..util.encoding import get_input_encoding, get_output_encoding
+
+
+# Define a few helper classes.
+
+class EOF (EOFError):
+ """Raise upon reaching the end of the input file.
+
+ After this point, no more user interaction is possible.
+ """
+ pass
+
+class Default (object):
+ """Marker for options not given on the command line.
+ """
+ pass
+
+class CommandLineParser (optparse.OptionParser):
+ """Implement a command line syntax for a
+ :class:`hooke.command.Command`.
+ """
+ def __init__(self, command, name_fn):
+ optparse.OptionParser.__init__(self, prog=name_fn(command.name))
+ self.command = command
+ self.command_opts = []
+ self.command_args = []
+ for a in command.arguments:
+ if a.name == 'help':
+ continue # 'help' is a default OptionParser option
+ if a.optional == True:
+ name = name_fn(a.name)
+ type = a.type
+ if type == 'bool':
+ if a.default == True:
+ try:
+ self.add_option(
+ '--disable-%s' % name, dest=name,
+ default=Default, action='store_false',
+ help=self._argument_help(a))
+ except optparse.OptionConflictError, e:
+ logging.warn('error in %s: %s' % (command, e))
+ raise
+ self.command_opts.append(a)
+ continue
+ elif a.default == False:
+ try:
+ self.add_option(
+ '--enable-%s' % name, dest=name,
+ default=Default, action='store_true',
+ help=self._argument_help(a))
+ except optparse.OptionConflictError, e:
+ logging.warn('error in %s: %s' % (command, e))
+ raise
+ self.command_opts.append(a)
+ continue
+ else:
+ type = 'string'
+ elif type not in ['string', 'int', 'long', 'choice', 'float',
+ 'complex']:
+ type = 'string'
+ try:
+ self.add_option(
+ '--%s' % name, dest=name, type=type, default=Default,
+ help=self._argument_help(a))
+ except optparse.OptionConflictError, e:
+ logging.warn('error in %s: %s' % (command, e))
+ raise
+ self.command_opts.append(a)
+ else:
+ self.command_args.append(a)
+ infinite_counters = [a for a in self.command_args if a.count == -1]
+ assert len(infinite_counters) <= 1, \
+ 'Multiple infinite counts for %s: %s\nNeed a better CommandLineParser implementation.' \
+ % (command.name, ', '.join([a.name for a in infinite_counters]))
+ if len(infinite_counters) == 1: # move the big counter to the end.
+ infinite_counter = infinite_counters[0]
+ self.command_args.remove(infinite_counter)
+ self.command_args.append(infinite_counter)
+
+ def _argument_help(self, argument):
+ return '%s (%s)' % (argument._help, argument.default)
+ # default in the case of callbacks, config-backed values, etc.?
+
+ def exit(self, status=0, msg=None):
+ """Override :meth:`optparse.OptionParser.exit` which calls
+ :func:`sys.exit`.
+ """
+ if msg:
+ raise optparse.OptParseError(msg)
+ raise optparse.OptParseError('OptParse EXIT')
+
+class CommandMethod (object):
+ """Base class for method replacer.
+
+ The .__call__ methods of `CommandMethod` subclasses functions will
+ provide the `do_*`, `help_*`, and `complete_*` methods of
+ :class:`HookeCmd`.
+ """
+ def __init__(self, cmd, command, name_fn):
+ self.cmd = cmd
+ self.command = command
+ self.name_fn = name_fn
+
+ def __call__(self, *args, **kwargs):
+ raise NotImplementedError
+
+class DoCommand (CommandMethod):
+ def __init__(self, *args, **kwargs):
+ super(DoCommand, self).__init__(*args, **kwargs)
+ self.parser = CommandLineParser(self.command, self.name_fn)
+
+ def __call__(self, args):
+ try:
+ args = self._parse_args(args)
+ except optparse.OptParseError, e:
+ self.cmd.stdout.write(unicode(e).lstrip()+'\n')
+ self.cmd.stdout.write('Failure\n')
+ return
+ cm = CommandMessage(self.command.name, args)
+ self.cmd.ui._submit_command(cm, self.cmd.inqueue)
+ while True:
+ msg = self.cmd.outqueue.get()
+ if isinstance(msg, Exit):
+ return True
+ elif isinstance(msg, CommandExit):
+ self.cmd.stdout.write(msg.__class__.__name__+'\n')
+ self.cmd.stdout.write(unicode(msg).rstrip()+'\n')
+ break
+ elif isinstance(msg, ReloadUserInterfaceConfig):
+ self.cmd.ui.reload_config(msg.config)
+ continue
+ elif isinstance(msg, Request):
+ try:
+ self._handle_request(msg)
+ except EOF:
+ return True
+ continue
+ if isinstance(msg, dict):
+ text = pprint.pformat(msg)
+ else:
+ text = unicode(msg)
+ self.cmd.stdout.write(text.rstrip()+'\n')
+
+ def _parse_args(self, args):
+ options,args = self.parser.parse_args(args)
+ self._check_argument_length_bounds(args)
+ params = {}
+ for argument in self.parser.command_opts:
+ value = getattr(options, self.name_fn(argument.name))
+ if value != Default:
+ params[argument.name] = value
+ arg_index = 0
+ for argument in self.parser.command_args:
+ if argument.count == 1:
+ params[argument.name] = from_string(args[arg_index],
+ argument.type)
+ elif argument.count > 1:
+ params[argument.name] = [
+ from_string(a, argument.type)
+ for a in args[arg_index:arg_index+argument.count]]
+ else: # argument.count == -1:
+ params[argument.name] = [
+ from_string(a, argument.type) for a in args[arg_index:]]
+ arg_index += argument.count
+ return params
+
+ def _check_argument_length_bounds(self, arguments):
+ """Check that there are an appropriate number of arguments in
+ `args`.
+
+ If not, raise optparse.OptParseError().
+ """
+ min_args = 0
+ max_args = 0
+ for argument in self.parser.command_args:
+ if argument.optional == False and argument.count > 0:
+ min_args += argument.count
+ if max_args >= 0: # otherwise already infinite
+ if argument.count == -1:
+ max_args = -1
+ else:
+ max_args += argument.count
+ if len(arguments) < min_args \
+ or (max_args >= 0 and len(arguments) > max_args):
+ if min_args == max_args:
+ target_string = str(min_args)
+ elif max_args == -1:
+ target_string = 'more than %d' % min_args
+ else:
+ target_string = '%d to %d' % (min_args, max_args)
+ raise optparse.OptParseError(
+ '%d arguments given, but %s takes %s'
+ % (len(arguments), self.name_fn(self.command.name),
+ target_string))
+
+ def _handle_request(self, msg):
+ """Repeatedly try to get a response to `msg`.
+ """
+ prompt = getattr(self, '_%s_request_prompt' % msg.type, None)
+ if prompt == None:
+ raise NotImplementedError('_%s_request_prompt' % msg.type)
+ prompt_string = prompt(msg)
+ parser = getattr(self, '_%s_request_parser' % msg.type, None)
+ if parser == None:
+ raise NotImplementedError('_%s_request_parser' % msg.type)
+ error = None
+ while True:
+ if error != None:
+ self.cmd.stdout.write(''.join([
+ error.__class__.__name__, ': ', unicode(error), '\n']))
+ self.cmd.stdout.write(prompt_string)
+ stdin = sys.stdin
+ try:
+ sys.stdin = self.cmd.stdin
+ raw_response = raw_input()
+ except EOFError, e:
+ self.cmd.inqueue.put(EOFResponse())
+ self.cmd.inqueue.put(CloseEngine())
+ raise EOF
+ finally:
+ sys.stdin = stdin
+ value = parser(msg, raw_response)
+ try:
+ response = msg.response(value)
+ break
+ except ValueError, error:
+ continue
+ self.cmd.inqueue.put(response)
+
+ def _boolean_request_prompt(self, msg):
+ if msg.default == True:
+ yn = ' [Y/n] '
+ else:
+ yn = ' [y/N] '
+ return msg.msg + yn
+
+ def _boolean_request_parser(self, msg, response):
+ value = response.strip().lower()
+ if value.startswith('y'):
+ value = True
+ elif value.startswith('n'):
+ value = False
+ elif len(value) == 0:
+ value = msg.default
+ return value
+
+ def _string_request_prompt(self, msg):
+ if msg.default == None:
+ d = ' '
+ else:
+ d = ' [%s] ' % msg.default
+ return msg.msg + d
+
+ def _string_request_parser(self, msg, response):
+ response = response.strip()
+ if response == '':
+ return msg.default
+ return response.strip()
+
+ def _float_request_prompt(self, msg):
+ return self._string_request_prompt(msg)
+
+ def _float_request_parser(self, msg, resposne):
+ if response.strip() == '':
+ return msg.default
+ return float(response)
+
+ def _selection_request_prompt(self, msg):
+ options = []
+ for i,option in enumerate(msg.options):
+ options.append(' %d) %s' % (i,option))
+ options = ''.join(options)
+ if msg.default == None:
+ prompt = '? '
+ else:
+ prompt = '? [%d] ' % msg.default
+ return '\n'.join([msg.msg,options,prompt])
+
+ def _selection_request_parser(self, msg, response):
+ if response.strip() == '':
+ return msg.default
+ return int(response)
+
+ def _point_request_prompt(self, msg):
+ block = msg.curve.data[msg.block]
+ block_info = ('(curve: %s, block: %s, %d points)'
+ % (msg.curve.name,
+ block.info['name'],
+ block.shape[0]))
+
+ if msg.default == None:
+ prompt = '? '
+ else:
+ prompt = '? [%d] ' % msg.default
+ return ' '.join([msg.msg,block_info,prompt])
+
+ def _point_request_parser(self, msg, response):
+ if response.strip() == '':
+ return msg.default
+ return int(response)
+
+
+class HelpCommand (CommandMethod):
+ """Supersedes :class:`hooke.plugin.engine.HelpCommand`.
+ """
+ def __init__(self, *args, **kwargs):
+ super(HelpCommand, self).__init__(*args, **kwargs)
+ self.parser = CommandLineParser(self.command, self.name_fn)
+
+ def __call__(self):
+ blocks = [self.parser.format_help(),
+ self._command_message(),
+ '----',
+ 'Usage: ' + self._usage_string(),
+ '']
+ self.cmd.stdout.write('\n'.join(blocks))
+
+ def _command_message(self):
+ return self.command._help
+
+ def _usage_string(self):
+ if len(self.parser.command_opts) == 0:
+ options_string = ''
+ else:
+ options_string = '[options]'
+ arg_string = ' '.join(
+ [self.name_fn(arg.name) for arg in self.parser.command_args])
+ return ' '.join([x for x in [self.parser.prog,
+ options_string,
+ arg_string]
+ if x != ''])
+
+class CompleteCommand (CommandMethod):
+ def __call__(self, text, line, begidx, endidx):
+ pass
+
+
+
+# Now onto the main attraction.
+
+class HookeCmd (cmd.Cmd):
+ def __init__(self, ui, commands, inqueue, outqueue):
+ cmd.Cmd.__init__(self)
+ self.ui = ui
+ self.commands = commands
+ self.prompt = 'hooke> '
+ self._add_command_methods()
+ self.inqueue = inqueue
+ self.outqueue = outqueue
+
+ def _name_fn(self, name):
+ return name.replace(' ', '_')
+
+ def _add_command_methods(self):
+ for command in self.commands:
+ if command.name == 'exit':
+ command.aliases.extend(['quit', 'EOF'])
+ for name in [command.name] + command.aliases:
+ name = self._name_fn(name)
+ setattr(self.__class__, 'help_%s' % name,
+ HelpCommand(self, command, self._name_fn))
+ if name != 'help':
+ setattr(self.__class__, 'do_%s' % name,
+ DoCommand(self, command, self._name_fn))
+ setattr(self.__class__, 'complete_%s' % name,
+ CompleteCommand(self, command, self._name_fn))
+
+ def parseline(self, line):
+ """Override Cmd.parseline to use shlex.split.
+
+ Notes
+ -----
+ This allows us to handle comments cleanly. With the default
+ Cmd implementation, a pure comment line will call the .default
+ error message.
+
+ Since we use shlex to strip comments, we return a list of
+ split arguments rather than the raw argument string.
+ """
+ line = line.strip()
+ argv = shlex.split(line, comments=True, posix=True)
+ if len(argv) == 0:
+ return None, None, '' # return an empty line
+ cmd = argv[0]
+ args = argv[1:]
+ if cmd == '?':
+ cmd = 'help'
+ elif cmd == '!':
+ cmd = 'system'
+ return cmd, args, line
+
+ def do_help(self, arg):
+ """Wrap Cmd.do_help to handle our .parseline argument list.
+ """
+ if len(arg) == 0:
+ return cmd.Cmd.do_help(self, '')
+ return cmd.Cmd.do_help(self, arg[0])
+
+ def emptyline(self):
+ """Override Cmd.emptyline to not do anything.
+
+ Repeating the last non-empty command seems unwise. Explicit
+ is better than implicit.
+ """
+ pass
+
class CommandLine (UserInterface):
"""Command line interface. Simple and powerful.
"""
def __init__(self):
super(CommandLine, self).__init__(name='command line')
+
+ def _cmd(self, commands, ui_to_command_queue, command_to_ui_queue):
+ cmd = HookeCmd(self, commands,
+ inqueue=ui_to_command_queue,
+ outqueue=command_to_ui_queue)
+ #cmd.stdin = codecs.getreader(get_input_encoding())(cmd.stdin)
+ cmd.stdout = codecs.getwriter(get_output_encoding())(cmd.stdout)
+ return cmd
+
+ def run(self, commands, ui_to_command_queue, command_to_ui_queue):
+ cmd = self._cmd(commands, ui_to_command_queue, command_to_ui_queue)
+ cmd.cmdloop(self._splash_text(extra_info={
+ 'get-details':'run `license`',
+ }))
+
+ def run_lines(self, commands, ui_to_command_queue, command_to_ui_queue,
+ lines):
+ cmd = self._cmd(commands, ui_to_command_queue, command_to_ui_queue)
+ for line in lines:
+ cmd.onecmd(line)
projects / hooke.git / blobdiff