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
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26 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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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
40 from kamaki.cli.argument import _arguments, update_arguments
41 from kamaki.cli.utils import print_dict
42 from kamaki.cli.history import History
46 _arguments.pop('version', None)
47 _arguments.pop('options', None)
48 _arguments.pop('history', None)
52 """Kamaki interactive shell"""
57 undoc_header = 'interactive shell commands:'
59 def greet(self, version):
60 print('kamaki v%s - Interactive Shell\n\t(exit or ^D to exit)\n'\
63 def set_prompt(self, new_prompt):
64 self.prompt = '[%s]:' % new_prompt
66 def do_exit(self, line):
70 def do_shell(self, line):
71 output = popen(line).read()
81 def _register_method(self, method, name):
82 self.__dict__[name] = method
85 def _unregister_method(self, name):
87 self.__dict__.pop(name)
91 def _roll_command(self, cmd_path):
92 for subname in self.cmd_tree.get_subnames(cmd_path):
93 self._unregister_method('do_%s' % subname)
94 self._unregister_method('complete_%s' % subname)
95 self._unregister_method('help_%s' % subname)
99 return dict(self.__dict__)
102 def _restore(self, oldcontext):
103 self.__dict__ = oldcontext
105 def _push_in_command(self, cmd_path):
106 cmd = self.cmd_tree.get_command(cmd_path)
107 self.cmd_tree = self.cmd_tree
108 _history = self._history
110 def do_method(self, line):
111 """ Template for all cmd.Cmd methods of the form do_<cmd name>
112 Parse cmd + args and decide to execute or change context
113 <cmd> <term> <term> <args> is always parsed to most specific
114 even if cmd_term_term is not a terminal path
117 _history.add(' '.join([cmd.path.replace('_', ' '), line]))
118 subcmd, cmd_args = cmd.parse_out(line.split())
119 active_terms = [cmd.name] +\
120 subcmd.path.split('_')[len(cmd.path.split('_')):]
121 subname = '_'.join(active_terms)
122 cmd_parser = ArgumentParser(subname, add_help=False)
123 cmd_parser.description = subcmd.help
125 # exec command or change context
126 if subcmd.is_command: # exec command
127 cls = subcmd.get_class()
128 instance = cls(dict(_arguments))
129 cmd_parser.prog = '%s %s' % (cmd_parser.prog.replace('_', ' '),
131 update_arguments(cmd_parser, instance.arguments)
132 #_update_parser(cmd_parser, instance.arguments)
133 if '-h' in cmd_args or '--help' in cmd_args:
134 cmd_parser.print_help()
136 parsed, unparsed = cmd_parser.parse_known_args(cmd_args)
138 for name, arg in instance.arguments.items():
139 arg.value = getattr(parsed, name, arg.default)
140 _exec_cmd(instance, unparsed, cmd_parser.print_help)
141 elif ('-h' in cmd_args or '--help' in cmd_args) \
142 or len(cmd_args): # print options
143 print('%s: %s' % (subname, subcmd.help))
145 for sub in subcmd.get_subcommands():
146 options[sub.name] = sub.help
148 else: # change context
150 backup_context = self._backup()
151 old_prompt = self.prompt
152 new_context._roll_command(cmd.parent_path)
153 new_context.set_prompt(subcmd.path.replace('_', ' '))
154 newcmds = [subcmd for subcmd in subcmd.get_subcommands()]
155 for subcmd in newcmds:
156 new_context._push_in_command(subcmd.path)
157 new_context.cmdloop()
158 self.prompt = old_prompt
159 #when new context is over, roll back to the old one
160 self._restore(backup_context)
161 self._register_method(do_method, 'do_%s' % cmd.name)
163 def help_method(self):
164 print('%s (%s -h for more options)' % (cmd.help, cmd.name))
165 self._register_method(help_method, 'help_%s' % cmd.name)
167 def complete_method(self, text, line, begidx, endidx):
168 subcmd, cmd_args = cmd.parse_out(line.split()[1:])
169 if subcmd.is_command:
170 cls = subcmd.get_class()
171 instance = cls(dict(_arguments))
172 empty, sep, subname = subcmd.path.partition(cmd.path)
173 cmd_name = '%s %s' % (cmd.name, subname.replace('_', ' '))
174 print('\n%s\nSyntax:\t%s %s'\
175 % (cls.description, cmd_name, cls.syntax))
177 for arg in instance.arguments.values():
178 cmd_args[','.join(arg.parsed_name)] = arg.help
179 print_dict(cmd_args, ident=14)
180 stdout.write('%s %s' % (self.prompt, line))
181 return subcmd.get_subnames()
182 self._register_method(complete_method, 'complete_%s' % cmd.name)
185 def doc_header(self):
186 tmp_partition = self.prompt.partition(self._prefix)
187 tmp_partition = tmp_partition[2].partition(self._suffix)
188 hdr = tmp_partition[0].strip()
189 return '%s commands:' % hdr
191 def run(self, path=''):
192 self._history = History(_arguments['config'].get('history', 'file'))
194 cmd = self.cmd_tree.get_command(path)
195 intro = cmd.path.replace('_', ' ')
197 intro = self.cmd_tree.name
199 for subcmd in self.cmd_tree.get_subcommands(path):
200 self._push_in_command(subcmd.path)
202 self.set_prompt(intro)