1 # Copyright 2012-2013 GRNET S.A. All rights reserved.
3 # Redistribution and use in source and binary forms, with or
4 # without modification, are permitted provided that the following
7 # 1. Redistributions of source code must retain the above
8 # copyright notice, this list of conditions and the following
11 # 2. Redistributions in binary form must reproduce the above
12 # copyright notice, this list of conditions and the following
13 # disclaimer in the documentation and/or other materials
14 # provided with the distribution.
16 # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
17 # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
20 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
26 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 # POSSIBILITY OF SUCH DAMAGE.
29 # The views and conclusions contained in the software and
30 # documentation are those of the authors and should not be
31 # interpreted as representing official policies, either expressed
32 # or implied, of GRNET S.A.
36 from sys import stdout
38 from kamaki.cli import exec_cmd, print_error_message, print_subcommands_help
39 from kamaki.cli.argument import ArgumentParseManager
40 from kamaki.cli.utils import print_dict, split_input
41 from kamaki.cli.history import History
42 from kamaki.cli.errors import CLIError
43 from kamaki.clients import ClientError
44 from kamaki.cli.logger import add_file_logger
46 log = add_file_logger(__name__)
49 def _init_shell(exe_string, parser, username='', userid=''):
50 parser.arguments.pop('version', None)
52 shell.set_prompt(exe_string)
53 from kamaki import __version__ as version
54 shell.greet(version, username, userid)
55 shell.do_EOF = shell.do_exit
56 from kamaki.cli.command_tree import CommandTree
57 shell.cmd_tree = CommandTree(
58 'kamaki', 'A command line tool for poking clouds')
63 """Kamaki interactive shell"""
74 undoc_header = 'interactive shell commands:'
79 def postcmd(self, post, line):
80 if self._context_stack:
82 self._restore(self._context_stack.pop())
84 self._prompt_stack.pop()[len(self._prefix):-len(self._suffix)])
86 return Cmd.postcmd(self, post, line)
88 def precmd(self, line):
89 if line.startswith('/'):
90 start, end = len(self._prefix), -len(self._suffix)
91 cur_cmd_path = self.prompt.replace(' ', '_')[start:end]
92 if cur_cmd_path != self.cmd_tree.name:
93 cur_cmd = self.cmd_tree.get_command(cur_cmd_path)
94 self._context_stack.append(self._backup())
95 self._prompt_stack.append(self.prompt)
97 self._roll_command(cur_cmd.path)
98 new_context.set_prompt(self.cmd_tree.name)
99 for grp_cmd in self.cmd_tree.get_subcommands():
100 self._register_command(grp_cmd.path)
104 def greet(self, version, username='', userid=''):
105 print('kamaki v%s - Interactive Shell\n' % version)
106 print('\t/exit \tterminate kamaki')
107 print('\texit or ^D\texit context')
108 print('\t? or help \tavailable commands')
109 print('\t?command \thelp on command')
110 print('\t!<command>\texecute OS shell command')
112 if username or userid:
113 print('Session user is %s (uuid: %s)' % (username, userid))
115 def set_prompt(self, new_prompt):
116 self.prompt = '%s%s%s' % (self._prefix, new_prompt, self._suffix)
122 except KeyboardInterrupt:
123 print(' - interrupted')
127 def do_exit(self, line):
129 start, end = len(self._prefix), -len(self._suffix)
130 if self.prompt[start:end] == self.cmd_tree.name:
134 def do_shell(self, line):
135 output = popen(line).read()
141 return self._cmd.path
145 def _register_method(self, method, name):
146 self.__dict__[name] = method
149 def _unregister_method(self, name):
151 self.__dict__.pop(name)
155 def _roll_command(self, cmd_path=None):
156 for subname in self.cmd_tree.subnames(cmd_path):
157 self._unregister_method('do_%s' % subname)
158 self._unregister_method('complete_%s' % subname)
159 self._unregister_method('help_%s' % subname)
163 return dict(self.__dict__)
166 def _restore(self, oldcontext):
167 self.__dict__ = oldcontext
170 def _create_help_method(cmd_name, args, descr, syntax):
171 tmp_args = dict(args)
172 #tmp_args.pop('options', None)
173 tmp_args.pop('cloud', None)
174 tmp_args.pop('debug', None)
175 tmp_args.pop('verbose', None)
176 tmp_args.pop('silent', None)
177 tmp_args.pop('config', None)
178 help_parser = ArgumentParseManager(cmd_name, tmp_args)
179 help_parser.parser.description = descr
180 help_parser.syntax = syntax
181 return help_parser.parser.print_help
183 def _register_command(self, cmd_path):
184 cmd = self.cmd_tree.get_command(cmd_path)
185 arguments = self._parser.arguments
187 def do_method(new_context, line):
188 """ Template for all cmd.Cmd methods of the form do_<cmd name>
189 Parse cmd + args and decide to execute or change context
190 <cmd> <term> <term> <args> is always parsed to most specific
191 even if cmd_term_term is not a terminal path
193 subcmd, cmd_args = cmd.parse_out(split_input(line))
194 self._history.add(' '.join([cmd.path.replace('_', ' '), line]))
195 cmd_parser = ArgumentParseManager(
196 cmd.name, dict(self._parser.arguments))
197 cmd_parser.parser.description = subcmd.help
199 # exec command or change context
200 if subcmd.is_command: # exec command
202 cls = subcmd.cmd_class
203 ldescr = getattr(cls, 'long_description', '')
204 if subcmd.path == 'history_run':
206 dict(cmd_parser.arguments), self.auth_base,
207 cmd_tree=self.cmd_tree)
210 dict(cmd_parser.arguments),
211 self.auth_base, self.cloud)
212 cmd_parser.update_arguments(instance.arguments)
213 cmd_parser.arguments = instance.arguments
214 cmd_parser.syntax = '%s %s' % (
215 subcmd.path.replace('_', ' '), cls.syntax)
216 help_method = self._create_help_method(
217 cmd.name, cmd_parser.arguments,
218 subcmd.help, cmd_parser.syntax)
219 if '-h' in cmd_args or '--help' in cmd_args:
225 cmd_parser.parse(cmd_args)
227 for name, arg in instance.arguments.items():
229 cmd_parser.parsed, name, arg.default)
231 exec_cmd(instance, cmd_parser.unparsed, help_method)
232 #[term for term in cmd_parser.unparsed\
233 # if not term.startswith('-')],
234 except (ClientError, CLIError) as err:
235 print_error_message(err)
236 elif ('-h' in cmd_args or '--help' in cmd_args) or len(cmd_args):
238 print('%s' % cmd.help)
239 print_subcommands_help(cmd)
240 else: # change context
242 backup_context = self._backup()
243 old_prompt = self.prompt
244 new_context._roll_command(cmd.parent_path)
245 new_context.set_prompt(subcmd.path.replace('_', ' '))
246 newcmds = [subcmd for subcmd in subcmd.subcommands.values()]
247 for subcmd in newcmds:
248 new_context._register_command(subcmd.path)
249 new_context.cmdloop()
250 self.prompt = old_prompt
251 #when new context is over, roll back to the old one
252 self._restore(backup_context)
253 self._register_method(do_method, 'do_%s' % cmd.name)
255 def help_method(self):
256 print('%s (%s -h for more options)' % (cmd.help, cmd.name))
259 ldescr = getattr(cls, 'long_description', '')
260 #_construct_command_syntax(cls)
261 plist = self.prompt[len(self._prefix):-len(self._suffix)]
262 plist = plist.split(' ')
263 clist = cmd.path.split('_')
267 for i, term in enumerate(plist):
273 print('Syntax: %s %s' % (' '.join(clist[upto:]), cls.syntax))
275 print_subcommands_help(cmd)
277 self._register_method(help_method, 'help_%s' % cmd.name)
279 def complete_method(self, text, line, begidx, endidx):
280 subcmd, cmd_args = cmd.parse_out(split_input(line)[1:])
281 if subcmd.is_command:
282 cls = subcmd.cmd_class
283 instance = cls(dict(arguments))
284 empty, sep, subname = subcmd.path.partition(cmd.path)
285 cmd_name = '%s %s' % (cmd.name, subname.replace('_', ' '))
286 print('\n%s\nSyntax:\t%s %s' % (
287 cls.help, cmd_name, cls.syntax))
289 for arg in instance.arguments.values():
290 cmd_args[','.join(arg.parsed_name)] = arg.help
291 print_dict(cmd_args, indent=2)
292 stdout.write('%s %s' % (self.prompt, line))
293 return subcmd.subnames()
294 self._register_method(complete_method, 'complete_%s' % cmd.name)
297 def doc_header(self):
298 tmp_partition = self.prompt.partition(self._prefix)
299 tmp_partition = tmp_partition[2].partition(self._suffix)
300 hdr = tmp_partition[0].strip()
301 return '%s commands:' % hdr
303 def run(self, auth_base, cloud, parser, path=''):
304 self.auth_base = auth_base
306 self._parser = parser
307 self._history = History(
308 parser.arguments['config'].get('global', 'history_file'))
310 cmd = self.cmd_tree.get_command(path)
311 intro = cmd.path.replace('_', ' ')
313 intro = self.cmd_tree.name
315 acceptable = parser.arguments['config'].groups
316 total = self.cmd_tree.groups.keys()
317 self.cmd_tree.exclude(set(total).difference(acceptable))
319 for subcmd in self.cmd_tree.get_subcommands(path):
320 self._register_command(subcmd.path)
322 self.set_prompt(intro)
326 except Exception as e:
328 from traceback import print_stack