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
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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"""
67 undoc_header = 'interactive shell commands:'
69 def precmd(self, line):
73 def greet(self, version):
74 print('kamaki v%s - Interactive Shell\n\t(exit or ^D to exit)\n'\
77 def set_prompt(self, new_prompt):
78 self.prompt = '[%s]:' % new_prompt
80 def do_exit(self, line):
84 def do_shell(self, line):
85 output = popen(line).read()
95 def _register_method(self, method, name):
96 self.__dict__[name] = method
99 def _unregister_method(self, name):
101 self.__dict__.pop(name)
105 def _roll_command(self, cmd_path):
106 for subname in self.cmd_tree.get_subnames(cmd_path):
107 self._unregister_method('do_%s' % subname)
108 self._unregister_method('complete_%s' % subname)
109 self._unregister_method('help_%s' % subname)
113 return dict(self.__dict__)
116 def _restore(self, oldcontext):
117 self.__dict__ = oldcontext
119 def _register_command(self, cmd_path):
120 cmd = self.cmd_tree.get_command(cmd_path)
121 _history = self._history
123 def do_method(self, line):
124 """ Template for all cmd.Cmd methods of the form do_<cmd name>
125 Parse cmd + args and decide to execute or change context
126 <cmd> <term> <term> <args> is always parsed to most specific
127 even if cmd_term_term is not a terminal path
130 _history.add(' '.join([cmd.path.replace('_', ' '), line]))
131 subcmd, cmd_args = cmd.parse_out(line.split())
132 active_terms = [cmd.name] +\
133 subcmd.path.split('_')[len(cmd.path.split('_')):]
134 subname = '_'.join(active_terms)
135 cmd_parser = ArgumentParser(subname, add_help=False)
136 cmd_parser.description = subcmd.help
138 # exec command or change context
139 if subcmd.is_command: # exec command
140 cls = subcmd.get_class()
141 instance = cls(dict(_arguments))
142 cmd_parser.prog = '%s %s' % (cmd_parser.prog.replace('_', ' '),
144 update_arguments(cmd_parser, instance.arguments)
145 #_update_parser(cmd_parser, instance.arguments)
146 if '-h' in cmd_args or '--help' in cmd_args:
147 cmd_parser.print_help()
149 parsed, unparsed = cmd_parser.parse_known_args(cmd_args)
151 for name, arg in instance.arguments.items():
152 arg.value = getattr(parsed, name, arg.default)
154 _exec_cmd(instance, unparsed, cmd_parser.print_help)
155 except CLIError as err:
156 _print_error_message(err)
157 elif ('-h' in cmd_args or '--help' in cmd_args) \
158 or len(cmd_args): # print options
159 print('%s: %s' % (subname, subcmd.help))
161 for sub in subcmd.get_subcommands():
162 options[sub.name] = sub.help
164 else: # change context
166 backup_context = self._backup()
167 old_prompt = self.prompt
168 new_context._roll_command(cmd.parent_path)
169 new_context.set_prompt(subcmd.path.replace('_', ' '))
170 newcmds = [subcmd for subcmd in subcmd.get_subcommands()]
171 for subcmd in newcmds:
172 new_context._register_command(subcmd.path)
173 new_context.cmdloop()
174 self.prompt = old_prompt
175 #when new context is over, roll back to the old one
176 self._restore(backup_context)
177 self._register_method(do_method, 'do_%s' % cmd.name)
179 def help_method(self):
180 print('%s (%s -h for more options)' % (cmd.help, cmd.name))
181 self._register_method(help_method, 'help_%s' % cmd.name)
183 def complete_method(self, text, line, begidx, endidx):
184 subcmd, cmd_args = cmd.parse_out(line.split()[1:])
185 if subcmd.is_command:
186 cls = subcmd.get_class()
187 instance = cls(dict(_arguments))
188 empty, sep, subname = subcmd.path.partition(cmd.path)
189 cmd_name = '%s %s' % (cmd.name, subname.replace('_', ' '))
190 print('\n%s\nSyntax:\t%s %s'\
191 % (cls.description, cmd_name, cls.syntax))
193 for arg in instance.arguments.values():
194 cmd_args[','.join(arg.parsed_name)] = arg.help
195 print_dict(cmd_args, ident=2)
196 stdout.write('%s %s' % (self.prompt, line))
197 return subcmd.get_subnames()
198 self._register_method(complete_method, 'complete_%s' % cmd.name)
201 def doc_header(self):
202 tmp_partition = self.prompt.partition(self._prefix)
203 tmp_partition = tmp_partition[2].partition(self._suffix)
204 hdr = tmp_partition[0].strip()
205 return '%s commands:' % hdr
207 def run(self, path=''):
208 self._history = History(_arguments['config'].get('history', 'file'))
210 cmd = self.cmd_tree.get_command(path)
211 intro = cmd.path.replace('_', ' ')
213 intro = self.cmd_tree.name
215 for subcmd in self.cmd_tree.get_subcommands(path):
216 self._register_command(subcmd.path)
218 self.set_prompt(intro)