1 # Copyright 2012 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
37 from argparse import ArgumentParser
39 from kamaki.cli import _exec_cmd, _print_error_message
40 from kamaki.cli.argument import update_arguments
41 from kamaki.cli.utils import print_dict
42 from kamaki.cli.history import History
43 from kamaki.cli.errors import CLIError
46 def _split_input(line):
47 """Use regular expressions to split a line correctly
51 pattern = '[ ]["].*?["][ ]'
52 re_parser = re.compile(pattern)
53 trivial_parts = re_parser.split(line)
54 interesting_parts = re_parser.findall(line)
55 print('Trivial parts: %s' % trivial_parts)
56 print('Interesting parts: %s ' % interesting_parts)
58 for i, ipart in enumerate(interesting_parts):
59 terms += trivial_parts[i].split()
60 terms.append(ipart[2:-2])
61 terms += trivial_parts[-1].split()
65 def _init_shell(exe_string, arguments):
66 arguments.pop('version', None)
67 arguments.pop('options', None)
68 arguments.pop('history', None)
70 shell.set_prompt(exe_string)
71 from kamaki import __version__ as version
73 shell.do_EOF = shell.do_exit
74 from kamaki.cli.command_tree import CommandTree
75 shell.cmd_tree = CommandTree(
76 'kamaki', 'A command line tool for poking clouds')
81 """Kamaki interactive shell"""
90 undoc_header = 'interactive shell commands:'
92 def postcmd(self, post, line):
93 if self._context_stack:
95 self._restore(self._context_stack.pop())
96 self.set_prompt(self._prompt_stack.pop()[1:-2])
98 return Cmd.postcmd(self, post, line)
100 def precmd(self, line):
101 if line.startswith('/'):
102 cur_cmd_path = self.prompt.replace(' ', '_')[1:-2]
103 if cur_cmd_path != self.cmd_tree.name:
104 cur_cmd = self.cmd_tree.get_command(cur_cmd_path)
105 self._context_stack.append(self._backup())
106 self._prompt_stack.append(self.prompt)
108 self._roll_command(cur_cmd.path)
109 new_context.set_prompt(self.cmd_tree.name)
110 for grp_cmd in self.cmd_tree.get_subcommands():
111 self._register_command(grp_cmd.path)
115 def greet(self, version):
116 print('kamaki v%s - Interactive Shell\n\t(exit or ^D to exit)\n'\
119 def set_prompt(self, new_prompt):
120 self.prompt = '[%s]:' % new_prompt
122 def do_exit(self, line):
124 if self.prompt[1:-2] == self.cmd_tree.name:
128 def do_shell(self, line):
129 output = popen(line).read()
135 return self._cmd.path
139 def _register_method(self, method, name):
140 self.__dict__[name] = method
143 def _unregister_method(self, name):
145 self.__dict__.pop(name)
149 def _roll_command(self, cmd_path=None):
150 for subname in self.cmd_tree.get_subnames(cmd_path):
151 self._unregister_method('do_%s' % subname)
152 self._unregister_method('complete_%s' % subname)
153 self._unregister_method('help_%s' % subname)
157 return dict(self.__dict__)
160 def _restore(self, oldcontext):
161 self.__dict__ = oldcontext
163 def _register_command(self, cmd_path):
164 cmd = self.cmd_tree.get_command(cmd_path)
165 arguments = self._arguments
167 def do_method(new_context, line):
168 """ Template for all cmd.Cmd methods of the form do_<cmd name>
169 Parse cmd + args and decide to execute or change context
170 <cmd> <term> <term> <args> is always parsed to most specific
171 even if cmd_term_term is not a terminal path
173 subcmd, cmd_args = cmd.parse_out(_split_input(line))
175 self._history.add(' '.join([cmd.path.replace('_', ' '), line]))
176 cmd_parser = ArgumentParser(cmd.name, add_help=False)
177 cmd_parser.description = subcmd.help
179 # exec command or change context
180 if subcmd.is_command: # exec command
181 cls = subcmd.get_class()
182 instance = cls(dict(arguments))
183 cmd_parser.prog = '%s %s' % (cmd_parser.prog.replace('_', ' '),
185 update_arguments(cmd_parser, instance.arguments)
186 if '-h' in cmd_args or '--help' in cmd_args:
187 cmd_parser.print_help()
189 parsed, unparsed = cmd_parser.parse_known_args(cmd_args)
191 for name, arg in instance.arguments.items():
192 arg.value = getattr(parsed, name, arg.default)
194 _exec_cmd(instance, unparsed, cmd_parser.print_help)
195 except CLIError as err:
196 _print_error_message(err)
197 elif ('-h' in cmd_args or '--help' in cmd_args) \
198 or len(cmd_args): # print options
199 print('%s: %s' % (cmd.name, subcmd.help))
201 for sub in subcmd.get_subcommands():
202 options[sub.name] = sub.help
204 else: # change context
206 backup_context = self._backup()
207 old_prompt = self.prompt
208 new_context._roll_command(cmd.parent_path)
209 new_context.set_prompt(subcmd.path.replace('_', ' '))
210 newcmds = [subcmd for subcmd in subcmd.get_subcommands()]
211 for subcmd in newcmds:
212 new_context._register_command(subcmd.path)
213 new_context.cmdloop()
214 self.prompt = old_prompt
215 #when new context is over, roll back to the old one
216 self._restore(backup_context)
217 self._register_method(do_method, 'do_%s' % cmd.name)
219 def help_method(self):
220 print('%s (%s -h for more options)' % (cmd.help, cmd.name))
221 self._register_method(help_method, 'help_%s' % cmd.name)
223 def complete_method(self, text, line, begidx, endidx):
224 subcmd, cmd_args = cmd.parse_out(_split_input(line)[1:])
225 if subcmd.is_command:
226 cls = subcmd.get_class()
227 instance = cls(dict(arguments))
228 empty, sep, subname = subcmd.path.partition(cmd.path)
229 cmd_name = '%s %s' % (cmd.name, subname.replace('_', ' '))
230 print('\n%s\nSyntax:\t%s %s'\
231 % (cls.description, cmd_name, cls.syntax))
233 for arg in instance.arguments.values():
234 cmd_args[','.join(arg.parsed_name)] = arg.help
235 print_dict(cmd_args, ident=2)
236 stdout.write('%s %s' % (self.prompt, line))
237 return subcmd.get_subnames()
238 self._register_method(complete_method, 'complete_%s' % cmd.name)
241 def doc_header(self):
242 tmp_partition = self.prompt.partition(self._prefix)
243 tmp_partition = tmp_partition[2].partition(self._suffix)
244 hdr = tmp_partition[0].strip()
245 return '%s commands:' % hdr
247 def run(self, arguments, path=''):
248 self._history = History(arguments['config'].get('history', 'file'))
249 self._arguments = arguments
251 cmd = self.cmd_tree.get_command(path)
252 intro = cmd.path.replace('_', ' ')
254 intro = self.cmd_tree.name
256 for subcmd in self.cmd_tree.get_subcommands(path):
257 self._register_command(subcmd.path)
259 self.set_prompt(intro)