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annotate libervia/cli/cmd_shell.py @ 4306:94e0968987cd

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plugin XEP-0033: code modernisation, improve delivery, data validation: - Code has been rewritten using Pydantic models and `async` coroutines for data validation and cleaner element parsing/generation. - Delivery has been completely rewritten. It now works even if server doesn't support multicast, and send to local multicast service first. Delivering to local multicast service first is due to bad support of XEP-0033 in server (notably Prosody which has an incomplete implementation), and the current impossibility to detect if a sub-domain service handles fully multicast or only for local domains. This is a workaround to have a good balance between backward compatilibity and use of bandwith, and to make it work with the incoming email gateway implementation (the gateway will only deliver to entities of its own domain). - disco feature checking now uses `async` corountines. `host` implementation still use Deferred return values for compatibility with legacy code. rel 450
author Goffi <goffi@goffi.org>
date Thu, 26 Sep 2024 16:12:01 +0200
parents 0d7bb4df2343
children
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1 #!/usr/bin/env python3
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2
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3
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4 # Libervia CLI
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20
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21 import cmd
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22 import sys
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23 import shlex
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24 import subprocess
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25 from . import base
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26 from libervia.backend.core.i18n import _
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27 from libervia.backend.core import exceptions
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28 from libervia.cli.constants import Const as C
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29 from libervia.cli import arg_tools
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30 from libervia.backend.tools.common.ansi import ANSI as A
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31
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32 __commands__ = ["Shell"]
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33 INTRO = _(
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34 """Welcome to {app_name} shell, the Salut à Toi shell !
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35
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36 This enrironment helps you using several {app_name} commands with similar parameters.
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37
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38 To quit, just enter "quit" or press C-d.
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39 Enter "help" or "?" to know what to do
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40 """
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41 ).format(app_name=C.APP_NAME)
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42
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43
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44 class Shell(base.CommandBase, cmd.Cmd):
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45 def __init__(self, host):
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46 base.CommandBase.__init__(
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47 self, host, "shell", help=_("launch libervia-cli in shell (REPL) mode")
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48 )
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49 cmd.Cmd.__init__(self)
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50
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51 def parse_args(self, args):
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52 """parse line arguments"""
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53 return shlex.split(args, posix=True)
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54
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55 def update_path(self):
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56 self._cur_parser = self.host.parser
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57 self.help = ""
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58 for idx, path_elt in enumerate(self.path):
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59 try:
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60 self._cur_parser = arg_tools.get_cmd_choices(path_elt, self._cur_parser)
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61 except exceptions.NotFound:
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62 self.disp(_("bad command path"), error=True)
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63 self.path = self.path[:idx]
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64 break
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65 else:
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66 self.help = self._cur_parser
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67
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68 self.prompt = A.color(C.A_PROMPT_PATH, "/".join(self.path)) + A.color(
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69 C.A_PROMPT_SUF, "> "
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70 )
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71 try:
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72 self.actions = list(arg_tools.get_cmd_choices(parser=self._cur_parser).keys())
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73 except exceptions.NotFound:
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74 self.actions = []
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75
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76 def add_parser_options(self):
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77 pass
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78
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79 def format_args(self, args):
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80 """format argument to be printed with quotes if needed"""
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81 for arg in args:
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82 if " " in arg:
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83 yield arg_tools.escape(arg)
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84 else:
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85 yield arg
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86
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87 def run_cmd(self, args, external=False):
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88 """run command and retur exit code
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89
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90 @param args[list[string]]: arguments of the command
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91 must not include program name
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92 @param external(bool): True if it's an external command (i.e. not libervia-cli)
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93 @return (int): exit code (0 success, any other int failure)
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94 """
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95 # FIXME: we have to use subprocess
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96 # and relaunch whole python for now
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97 # because if host.quit() is called in D-Bus callback
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98 # GLib quit the whole app without possibility to stop it
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99 # didn't found a nice way to work around it so far
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100 # Situation should be better when we'll move away from python-dbus
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101 if self.verbose:
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102 self.disp(
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103 _("COMMAND {external}=> {args}").format(
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104 external=_("(external) ") if external else "",
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105 args=" ".join(self.format_args(args)),
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106 )
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107 )
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108 if not external:
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109 args = sys.argv[0:1] + args
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110 ret_code = subprocess.call(args)
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111 # XXX: below is a way to launch the command without creating a new process
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112 # may be used when a solution to the aforementioned issue is there
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113 # try:
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114 # self.host._run(args)
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115 # except SystemExit as e:
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116 # ret_code = e.code
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117 # except Exception as e:
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118 # self.disp(A.color(C.A_FAILURE, u'command failed with an exception: {msg}'.format(msg=e)), error=True)
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119 # ret_code = 1
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120 # else:
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121 # ret_code = 0
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122
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123 if ret_code != 0:
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124 self.disp(
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125 A.color(
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126 C.A_FAILURE,
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127 "command failed with an error code of {err_no}".format(
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128 err_no=ret_code
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129 ),
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130 ),
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131 error=True,
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132 )
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133 return ret_code
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134
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135 def default(self, args):
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136 """called when no shell command is recognized
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137
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138 will launch the command with args on the line
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139 (i.e. will launch do [args])
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140 """
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141 if args == "EOF":
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142 self.do_quit("")
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143 self.do_do(args)
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144
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145 def do_help(self, args):
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146 """show help message"""
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147 if not args:
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148 self.disp(A.color(C.A_HEADER, _("Shell commands:")), end=" ")
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149 super(Shell, self).do_help(args)
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150 if not args:
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151 self.disp(A.color(C.A_HEADER, _("Action commands:")))
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152 help_list = self._cur_parser.format_help().split("\n\n")
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153 print(("\n\n".join(help_list[1 if self.path else 2 :])))
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154
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155 # FIXME: debug crashes on exit and is not that useful,
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156 # keeping it until refactoring, may be removed entirely then
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157 # def do_debug(self, args):
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158 # """launch internal debugger"""
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159 # try:
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160 # import ipdb as pdb
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161 # except ImportError:
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162 # import pdb
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163 # pdb.set_trace()
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164
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165 def do_verbose(self, args):
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166 """show verbose mode, or (de)activate it"""
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167 args = self.parse_args(args)
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168 if args:
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169 self.verbose = C.bool(args[0])
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170 self.disp(
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171 _("verbose mode is {status}").format(
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172 status=_("ENABLED") if self.verbose else _("DISABLED")
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173 )
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174 )
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175
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176 def do_cmd(self, args):
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177 """change command path"""
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178 if args == "..":
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179 self.path = self.path[:-1]
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180 else:
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181 if not args or args[0] == "/":
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182 self.path = []
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183 args = "/".join(args.split())
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184 for path_elt in args.split("/"):
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185 path_elt = path_elt.strip()
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186 if not path_elt:
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187 continue
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188 self.path.append(path_elt)
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189 self.update_path()
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190
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191 def do_version(self, args):
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192 """show current backend/CLI version"""
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193 self.run_cmd(["--version"])
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194
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195 def do_shell(self, args):
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196 """launch an external command (you can use ![command] too)"""
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197 args = self.parse_args(args)
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198 self.run_cmd(args, external=True)
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199
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200 def do_do(self, args):
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201 """lauch a command"""
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202 args = self.parse_args(args)
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203 if (
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204 self._not_default_profile
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205 and not "-p" in args
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206 and not "--profile" in args
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207 and not "profile" in self.use
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208 ):
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209 # profile is not specified and we are not using the default profile
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210 # so we need to add it in arguments to use current user profile
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211 if self.verbose:
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212 self.disp(
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213 _("arg profile={profile} (logged profile)").format(
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214 profile=self.profile
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215 )
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216 )
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217 use = self.use.copy()
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218 use["profile"] = self.profile
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219 else:
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220 use = self.use
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221
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222 # args may be modified by use_args
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223 # to remove subparsers from it
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224 parser_args, use_args = arg_tools.get_use_args(
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225 self.host, args, use, verbose=self.verbose, parser=self._cur_parser
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226 )
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227 cmd_args = self.path + parser_args + use_args
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228 self.run_cmd(cmd_args)
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229
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230 def do_use(self, args):
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231 """fix an argument"""
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232 args = self.parse_args(args)
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233 if not args:
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234 if not self.use:
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235 self.disp(_("no argument in USE"))
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236 else:
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237 self.disp(_("arguments in USE:"))
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238 for arg, value in self.use.items():
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239 self.disp(
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240 _(
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241 A.color(
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242 C.A_SUBHEADER,
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243 arg,
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244 A.RESET,
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245 " = ",
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246 arg_tools.escape(value),
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247 )
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248 )
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249 )
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250 elif len(args) != 2:
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251 self.disp("bad syntax, please use:\nuse [arg] [value]", error=True)
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252 else:
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253 self.use[args[0]] = " ".join(args[1:])
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254 if self.verbose:
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255 self.disp(
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256 "set {name} = {value}".format(
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257 name=args[0], value=arg_tools.escape(args[1])
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258 )
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259 )
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260
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261 def do_use_clear(self, args):
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262 """unset one or many argument(s) in USE, or all of them if no arg is specified"""
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263 args = self.parse_args(args)
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264 if not args:
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265 self.use.clear()
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266 else:
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267 for arg in args:
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268 try:
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269 del self.use[arg]
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270 except KeyError:
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271 self.disp(
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272 A.color(
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273 C.A_FAILURE, _("argument {name} not found").format(name=arg)
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274 ),
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275 error=True,
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276 )
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277 else:
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278 if self.verbose:
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279 self.disp(_("argument {name} removed").format(name=arg))
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280
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281 def do_whoami(self, args):
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282 """print profile currently used"""
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283 self.disp(self.profile)
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284
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285 def do_quit(self, args):
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286 """quit the shell"""
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287 self.disp(_("good bye!"))
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288 self.host.quit()
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289
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290 def do_exit(self, args):
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291 """alias for quit"""
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292 self.do_quit(args)
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293
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294 async def start(self):
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295 # FIXME: "shell" is currently kept synchronous as it works well as it
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296 # and it will be refactored soon.
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297 default_profile = self.host.bridge.profile_name_get(C.PROF_KEY_DEFAULT)
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298 self._not_default_profile = self.profile != default_profile
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299 self.path = []
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300 self._cur_parser = self.host.parser
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301 self.use = {}
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302 self.verbose = False
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303 self.update_path()
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304 self.cmdloop(INTRO)