/usr/lib/python3/dist-packages/cliff/interactive.py is in python3-cliff 1.15.0-2ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | """Application base class.
"""
import itertools
import logging
import logging.handlers
import shlex
import sys
import cmd2
LOG = logging.getLogger(__name__)
class InteractiveApp(cmd2.Cmd):
"""Provides "interactive mode" features.
Refer to the cmd2_ and cmd_ documentation for details
about subclassing and configuring this class.
.. _cmd2: http://packages.python.org/cmd2/index.html
.. _cmd: http://docs.python.org/library/cmd.html
:param parent_app: The calling application (expected to be derived
from :class:`cliff.main.App`).
:param command_manager: A :class:`cliff.commandmanager.CommandManager`
instance.
:param stdin: Standard input stream
:param stdout: Standard output stream
"""
use_rawinput = True
doc_header = "Shell commands (type help <topic>):"
app_cmd_header = "Application commands (type help <topic>):"
def __init__(self, parent_app, command_manager, stdin, stdout):
self.parent_app = parent_app
if not hasattr(sys.stdin, 'isatty') or sys.stdin.isatty():
self.prompt = '(%s) ' % parent_app.NAME
else:
# batch/pipe mode
self.prompt = ''
self.command_manager = command_manager
cmd2.Cmd.__init__(self, 'tab', stdin=stdin, stdout=stdout)
def default(self, line):
# Tie in the default command processor to
# dispatch commands known to the command manager.
# We send the message through our parent app,
# since it already has the logic for executing
# the subcommand.
line_parts = shlex.split(line.parsed.raw)
self.parent_app.run_subcommand(line_parts)
def completenames(self, text, *ignored):
"""Tab-completion for command prefix without completer delimiter.
This method returns cmd style and cliff style commands matching
provided command prefix (text).
"""
completions = cmd2.Cmd.completenames(self, text, *ignored)
completions += self._complete_prefix(text)
return completions
def completedefault(self, text, line, begidx, endidx):
"""Default tab-completion for command prefix with completer delimiter.
This method filters only cliff style commands matching provided
command prefix (line) as cmd2 style commands cannot contain spaces.
This method returns text + missing command part of matching commands.
This method does not handle options in cmd2/cliff style commands, you
must define complete_$method to handle them.
"""
return [x[begidx:] for x in self._complete_prefix(line)]
def _complete_prefix(self, prefix):
"""Returns cliff style commands with a specific prefix."""
if not prefix:
return [n for n, v in self.command_manager]
return [n for n, v in self.command_manager if n.startswith(prefix)]
def help_help(self):
# Use the command manager to get instructions for "help"
self.default('help help')
def do_help(self, arg):
if arg:
# Check if the arg is a builtin command or something
# coming from the command manager
arg_parts = shlex.split(arg)
method_name = '_'.join(
itertools.chain(
['do'],
itertools.takewhile(lambda x: not x.startswith('-'),
arg_parts)
)
)
# Have the command manager version of the help
# command produce the help text since cmd and
# cmd2 do not provide help for "help"
if hasattr(self, method_name):
return cmd2.Cmd.do_help(self, arg)
# Dispatch to the underlying help command,
# which knows how to provide help for extension
# commands.
self.default(self.parsed('help ' + arg))
else:
cmd2.Cmd.do_help(self, arg)
cmd_names = sorted([n for n, v in self.command_manager])
self.print_topics(self.app_cmd_header, cmd_names, 15, 80)
return
def get_names(self):
# Override the base class version to filter out
# things that look like they should be hidden
# from the user.
return [n
for n in cmd2.Cmd.get_names(self)
if not n.startswith('do__')
]
def precmd(self, statement):
# Pre-process the parsed command in case it looks like one of
# our subcommands, since cmd2 does not handle multi-part
# command names by default.
line_parts = shlex.split(statement.parsed.raw)
try:
the_cmd = self.command_manager.find_command(line_parts)
cmd_factory, cmd_name, sub_argv = the_cmd
except ValueError:
# Not a plugin command
pass
else:
statement.parsed.command = cmd_name
statement.parsed.args = ' '.join(sub_argv)
return statement
def cmdloop(self):
self._cmdloop()
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