1 # Copyright (C) 2010 W. Trevor King <wking@drexel.edu>
3 # This file is part of Hooke.
5 # Hooke is free software: you can redistribute it and/or modify it
6 # under the terms of the GNU Lesser General Public License as
7 # published by the Free Software Foundation, either version 3 of the
8 # License, or (at your option) any later version.
10 # Hooke is distributed in the hope that it will be useful, but WITHOUT
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
13 # Public License for more details.
15 # You should have received a copy of the GNU Lesser General Public
16 # License along with Hooke. If not, see
17 # <http://www.gnu.org/licenses/>.
19 """Defines :class:`CommandLine` for driving Hooke from the command
28 import readline # including readline makes cmd.Cmd.cmdloop() smarter
29 except ImportError, e:
31 logging.warn('Could not import readline, bash-like line editing disabled.')
34 from ..command import CommandExit, Exit, Command, Argument, StoreValue
35 from ..engine import CommandMessage
36 from ..interaction import Request, ReloadUserInterfaceConfig
37 from ..ui import UserInterface
38 from ..util.convert import from_string
39 from ..util.encoding import get_input_encoding, get_output_encoding
42 # Define a few helper classes.
44 class Default (object):
45 """Marker for options not given on the command line.
49 class CommandLineParser (optparse.OptionParser):
50 """Implement a command line syntax for a
51 :class:`hooke.command.Command`.
53 def __init__(self, command, name_fn):
54 optparse.OptionParser.__init__(self, prog=name_fn(command.name))
55 self.command = command
56 self.command_opts = []
57 self.command_args = []
58 for a in command.arguments:
60 continue # 'help' is a default OptionParser option
61 if a.optional == True:
62 name = name_fn(a.name)
67 '--disable-%s' % name, dest=name, default=Default,
69 self.command_opts.append(a)
71 elif a.default == False:
73 '--enable-%s' % name, dest=name, default=Default,
75 self.command_opts.append(a)
79 elif type not in ['string', 'int', 'long', 'choice', 'float',
83 '--%s' % name, dest=name, type=type, default=Default)
84 self.command_opts.append(a)
86 self.command_args.append(a)
87 infinite_counters = [a for a in self.command_args if a.count == -1]
88 assert len(infinite_counters) <= 1, \
89 'Multiple infinite counts for %s: %s\nNeed a better CommandLineParser implementation.' \
90 % (command.name, ', '.join([a.name for a in infinite_counters]))
91 if len(infinite_counters) == 1: # move the big counter to the end.
92 infinite_counter = infinite_counters[0]
93 self.command_args.remove(infinite_counter)
94 self.command_args.append(infinite_counter)
96 def exit(self, status=0, msg=None):
97 """Override :meth:`optparse.OptionParser.exit` which calls
101 raise optparse.OptParseError(msg)
102 raise optparse.OptParseError('OptParse EXIT')
104 class CommandMethod (object):
105 """Base class for method replacer.
107 The .__call__ methods of `CommandMethod` subclasses functions will
108 provide the `do_*`, `help_*`, and `complete_*` methods of
111 def __init__(self, cmd, command, name_fn):
113 self.command = command
114 self.name_fn = name_fn
116 def __call__(self, *args, **kwargs):
117 raise NotImplementedError
119 class DoCommand (CommandMethod):
120 def __init__(self, *args, **kwargs):
121 super(DoCommand, self).__init__(*args, **kwargs)
122 self.parser = CommandLineParser(self.command, self.name_fn)
123 self.log = logging.getLogger('hooke')
125 def __call__(self, args):
127 args = self._parse_args(args)
128 except optparse.OptParseError, e:
129 self.cmd.stdout.write(str(e).lstrip()+'\n')
130 self.cmd.stdout.write('Failure\n')
132 self.log.debug('executing %s with %s' % (self.command.name, args))
133 self.cmd.inqueue.put(CommandMessage(self.command.name, args))
135 msg = self.cmd.outqueue.get()
136 if isinstance(msg, Exit):
138 elif isinstance(msg, CommandExit):
139 self.cmd.stdout.write(msg.__class__.__name__+'\n')
140 self.cmd.stdout.write(str(msg).rstrip()+'\n')
142 elif isinstance(msg, ReloadUserInterfaceConfig):
143 self.cmd.ui.reload_config(msg.config)
145 elif isinstance(msg, Request):
146 self._handle_request(msg)
148 self.cmd.stdout.write(str(msg).rstrip()+'\n')
150 def _parse_args(self, args):
151 options,args = self.parser.parse_args(args)
152 self._check_argument_length_bounds(args)
154 for argument in self.parser.command_opts:
155 value = getattr(options, self.name_fn(argument.name))
157 params[argument.name] = value
159 for argument in self.parser.command_args:
160 if argument.count == 1:
161 params[argument.name] = from_string(args[arg_index],
163 elif argument.count > 1:
164 params[argument.name] = [
165 from_string(a, argument.type)
166 for a in args[arg_index:arg_index+argument.count]]
167 else: # argument.count == -1:
168 params[argument.name] = [
169 from_string(a, argument.type) for a in args[arg_index:]]
170 arg_index += argument.count
173 def _check_argument_length_bounds(self, arguments):
174 """Check that there are an appropriate number of arguments in
177 If not, raise optparse.OptParseError().
181 for argument in self.parser.command_args:
182 if argument.optional == False and argument.count > 0:
183 min_args += argument.count
184 if max_args >= 0: # otherwise already infinite
185 if argument.count == -1:
188 max_args += argument.count
189 if len(arguments) < min_args \
190 or (max_args >= 0 and len(arguments) > max_args):
191 if min_args == max_args:
192 target_string = str(min_args)
194 target_string = 'more than %d' % min_args
196 target_string = '%d to %d' % (min_args, max_args)
197 raise optparse.OptParseError(
198 '%d arguments given, but %s takes %s'
199 % (len(arguments), self.name_fn(self.command.name),
202 def _handle_request(self, msg):
203 """Repeatedly try to get a response to `msg`.
205 prompt = getattr(self, '_%s_request_prompt' % msg.type, None)
207 raise NotImplementedError('_%s_request_prompt' % msg.type)
208 prompt_string = prompt(msg)
209 parser = getattr(self, '_%s_request_parser' % msg.type, None)
211 raise NotImplementedError('_%s_request_parser' % msg.type)
215 self.cmd.stdout.write(''.join([
216 error.__class__.__name__, ': ', str(error), '\n']))
217 self.cmd.stdout.write(prompt_string)
218 value = parser(msg, self.cmd.stdin.readline())
220 response = msg.response(value)
222 except ValueError, error:
224 self.cmd.inqueue.put(response)
226 def _boolean_request_prompt(self, msg):
227 if msg.default == True:
233 def _boolean_request_parser(self, msg, response):
234 value = response.strip().lower()
235 if value.startswith('y'):
237 elif value.startswith('n'):
239 elif len(value) == 0:
243 def _string_request_prompt(self, msg):
244 if msg.default == None:
247 d = ' [%s] ' % msg.default
250 def _string_request_parser(self, msg, response):
251 response = response.strip()
254 return response.strip()
256 def _float_request_prompt(self, msg):
257 return self._string_request_prompt(msg)
259 def _float_request_parser(self, msg, resposne):
260 if response.strip() == '':
262 return float(response)
264 def _selection_request_prompt(self, msg):
266 for i,option in enumerate(msg.options):
267 options.append(' %d) %s' % (i,option))
268 options = ''.join(options)
269 if msg.default == None:
272 prompt = '? [%d] ' % msg.default
273 return '\n'.join([msg.msg,options,prompt])
275 def _selection_request_parser(self, msg, response):
276 if response.strip() == '':
280 def _point_request_prompt(self, msg):
281 block = msg.curve.data[msg.block]
282 block_info = ('(curve: %s, block: %s, %d points)'
287 if msg.default == None:
290 prompt = '? [%d] ' % msg.default
291 return ' '.join([msg.msg,block_info,prompt])
293 def _point_request_parser(self, msg, response):
294 if response.strip() == '':
299 class HelpCommand (CommandMethod):
300 """Supersedes :class:`hooke.plugin.engine.HelpCommand`.
302 def __init__(self, *args, **kwargs):
303 super(HelpCommand, self).__init__(*args, **kwargs)
304 self.parser = CommandLineParser(self.command, self.name_fn)
307 blocks = [self.command.help(name_fn=self.name_fn),
309 'Usage: ' + self._usage_string(),
311 self.cmd.stdout.write('\n'.join(blocks))
314 return self.command.help(name_fn=self.name_fn)
316 def _usage_string(self):
317 if len(self.parser.command_opts) == 0:
320 options_string = '[options]'
321 arg_string = ' '.join(
322 [self.name_fn(arg.name) for arg in self.parser.command_args])
323 return ' '.join([x for x in [self.parser.prog,
328 class CompleteCommand (CommandMethod):
329 def __call__(self, text, line, begidx, endidx):
334 # Now onto the main attraction.
336 class HookeCmd (cmd.Cmd):
337 def __init__(self, ui, commands, inqueue, outqueue):
338 cmd.Cmd.__init__(self)
340 self.commands = commands
341 self.prompt = 'hooke> '
342 self._add_command_methods()
343 self.inqueue = inqueue
344 self.outqueue = outqueue
346 def _name_fn(self, name):
347 return name.replace(' ', '_')
349 def _add_command_methods(self):
350 for command in self.commands:
351 if command.name == 'exit':
352 command.aliases.extend(['quit', 'EOF'])
353 for name in [command.name] + command.aliases:
354 name = self._name_fn(name)
355 setattr(self.__class__, 'help_%s' % name,
356 HelpCommand(self, command, self._name_fn))
358 setattr(self.__class__, 'do_%s' % name,
359 DoCommand(self, command, self._name_fn))
360 setattr(self.__class__, 'complete_%s' % name,
361 CompleteCommand(self, command, self._name_fn))
363 def parseline(self, line):
364 """Override Cmd.parseline to use shlex.split.
368 This allows us to handle comments cleanly. With the default
369 Cmd implementation, a pure comment line will call the .default
372 Since we use shlex to strip comments, we return a list of
373 split arguments rather than the raw argument string.
376 argv = shlex.split(line, comments=True, posix=True)
378 return None, None, '' # return an empty line
385 return cmd, args, line
387 def do_help(self, arg):
388 """Wrap Cmd.do_help to handle our .parseline argument list.
391 return cmd.Cmd.do_help(self, '')
392 return cmd.Cmd.do_help(self, arg[0])
395 """Override Cmd.emptyline to not do anything.
397 Repeating the last non-empty command seems unwise. Explicit
398 is better than implicit.
403 class CommandLine (UserInterface):
404 """Command line interface. Simple and powerful.
407 super(CommandLine, self).__init__(name='command line')
409 def _cmd(self, commands, ui_to_command_queue, command_to_ui_queue):
410 cmd = HookeCmd(self, commands,
411 inqueue=ui_to_command_queue,
412 outqueue=command_to_ui_queue)
413 #cmd.stdin = codecs.getreader(get_input_encoding())(cmd.stdin)
414 cmd.stdout = codecs.getwriter(get_output_encoding())(cmd.stdout)
417 def run(self, commands, ui_to_command_queue, command_to_ui_queue):
418 cmd = self._cmd(commands, ui_to_command_queue, command_to_ui_queue)
419 cmd.cmdloop(self._splash_text(extra_info={
420 'get-details':'run `license`',
423 def run_lines(self, commands, ui_to_command_queue, command_to_ui_queue,
425 cmd = self._cmd(commands, ui_to_command_queue, command_to_ui_queue)