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 _arguments, 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 _init_shell(exe_string, arguments):
47 arguments.pop('version', None)
48 arguments.pop('options', None)
49 arguments.pop('history', None)
51 shell.set_prompt(exe_string)
52 from kamaki import __version__ as version
54 shell.do_EOF = shell.do_exit
55 from kamaki.cli.command_tree import CommandTree
56 shell.cmd_tree = CommandTree(
57 'kamaki', 'A command line tool for poking clouds')
62 """Kamaki interactive shell"""
71 undoc_header = 'interactive shell commands:'
73 def postcmd(self, post, line):
74 if self._context_stack:
76 self.set_prompt(self._prompt_stack.pop()[1:-2])
77 self._restore(self._context_stack.pop())
79 return Cmd.postcmd(self, post, line)
81 def precmd(self, line):
82 if line.startswith('/'):
83 cur_cmd_path = self.prompt.replace(' ', '_')[1:-2]
84 if cur_cmd_path != self.cmd_tree.name:
85 cur_cmd = self.cmd_tree.get_command(cur_cmd_path)
86 self._context_stack.append(self._backup())
87 self._prompt_stack.append(self.prompt)
89 new_context._roll_command(cur_cmd.parent_path)
90 new_context.set_prompt(self.cmd_tree.name)
91 for grp_cmd in self.cmd_tree.get_subcommands():
92 self._register_command(grp_cmd.path)
96 def greet(self, version):
97 print('kamaki v%s - Interactive Shell\n\t(exit or ^D to exit)\n'\
100 def set_prompt(self, new_prompt):
101 self.prompt = '[%s]:' % new_prompt
103 def do_exit(self, line):
107 def do_shell(self, line):
108 output = popen(line).read()
114 return self._cmd.path
118 def _register_method(self, method, name):
119 self.__dict__[name] = method
122 def _unregister_method(self, name):
124 self.__dict__.pop(name)
128 def _roll_command(self, cmd_path=None):
129 for subname in self.cmd_tree.get_subnames(cmd_path):
130 self._unregister_method('do_%s' % subname)
131 self._unregister_method('complete_%s' % subname)
132 self._unregister_method('help_%s' % subname)
137 return dict(self.__dict__)
140 def _restore(self, oldcontext):
141 self.__dict__ = oldcontext
143 def _register_command(self, cmd_path):
144 cmd = self.cmd_tree.get_command(cmd_path)
145 arguments = self._arguments
147 def do_method(new_context, line):
148 """ Template for all cmd.Cmd methods of the form do_<cmd name>
149 Parse cmd + args and decide to execute or change context
150 <cmd> <term> <term> <args> is always parsed to most specific
151 even if cmd_term_term is not a terminal path
153 subcmd, cmd_args = cmd.parse_out(line.split())
155 self._history.add(' '.join([cmd.path.replace('_', ' '), line]))
156 cmd_parser = ArgumentParser(cmd.name, add_help=False)
157 cmd_parser.description = subcmd.help
159 # exec command or change context
160 if subcmd.is_command: # exec command
161 cls = subcmd.get_class()
162 instance = cls(dict(arguments))
163 cmd_parser.prog = '%s %s' % (cmd_parser.prog.replace('_', ' '),
165 update_arguments(cmd_parser, instance.arguments)
166 if '-h' in cmd_args or '--help' in cmd_args:
167 cmd_parser.print_help()
169 parsed, unparsed = cmd_parser.parse_known_args(cmd_args)
171 for name, arg in instance.arguments.items():
172 arg.value = getattr(parsed, name, arg.default)
174 _exec_cmd(instance, unparsed, cmd_parser.print_help)
175 except CLIError as err:
176 _print_error_message(err)
177 elif ('-h' in cmd_args or '--help' in cmd_args) \
178 or len(cmd_args): # print options
179 print('%s: %s' % (cmd.name, subcmd.help))
181 for sub in subcmd.get_subcommands():
182 options[sub.name] = sub.help
184 else: # change context
186 backup_context = self._backup()
187 old_prompt = self.prompt
188 new_context._roll_command(cmd.parent_path)
189 new_context.set_prompt(subcmd.path.replace('_', ' '))
190 newcmds = [subcmd for subcmd in subcmd.get_subcommands()]
191 for subcmd in newcmds:
192 new_context._register_command(subcmd.path)
193 new_context.cmdloop()
194 self.prompt = old_prompt
195 #when new context is over, roll back to the old one
196 self._restore(backup_context)
197 self._register_method(do_method, 'do_%s' % cmd.name)
199 def help_method(self):
200 print('%s (%s -h for more options)' % (cmd.help, cmd.name))
201 self._register_method(help_method, 'help_%s' % cmd.name)
203 def complete_method(self, text, line, begidx, endidx):
204 subcmd, cmd_args = cmd.parse_out(line.split()[1:])
205 if subcmd.is_command:
206 cls = subcmd.get_class()
207 instance = cls(dict(arguments))
208 empty, sep, subname = subcmd.path.partition(cmd.path)
209 cmd_name = '%s %s' % (cmd.name, subname.replace('_', ' '))
210 print('\n%s\nSyntax:\t%s %s'\
211 % (cls.description, cmd_name, cls.syntax))
213 for arg in instance.arguments.values():
214 cmd_args[','.join(arg.parsed_name)] = arg.help
215 print_dict(cmd_args, ident=2)
216 stdout.write('%s %s' % (self.prompt, line))
217 return subcmd.get_subnames()
218 self._register_method(complete_method, 'complete_%s' % cmd.name)
221 def doc_header(self):
222 tmp_partition = self.prompt.partition(self._prefix)
223 tmp_partition = tmp_partition[2].partition(self._suffix)
224 hdr = tmp_partition[0].strip()
225 return '%s commands:' % hdr
227 def run(self, arguments, path=''):
228 self._history = History(arguments['config'].get('history', 'file'))
229 self._arguments = arguments
231 cmd = self.cmd_tree.get_command(path)
232 intro = cmd.path.replace('_', ' ')
234 intro = self.cmd_tree.name
236 for subcmd in self.cmd_tree.get_subcommands(path):
237 self._register_command(subcmd.path)
239 self.set_prompt(intro)