Mercurial > libervia-backend
annotate libervia/cli/cmd_shell.py @ 4075:47401850dec6
refactoring: rename `libervia.frontends.jp` to `libervia.cli`
author | Goffi <goffi@goffi.org> |
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date | Fri, 02 Jun 2023 14:54:26 +0200 |
parents | libervia/frontends/jp/cmd_shell.py@26b7ed2817da |
children | 0d7bb4df2343 |
rev | line source |
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3137 | 1 #!/usr/bin/env python3 |
2 | |
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3 |
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4 # Libervia CLI |
3479 | 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 |
3040 | 23 import shlex |
24 import subprocess | |
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 = _( |
3028 | 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__( |
3040 | 47 self, host, "shell", |
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48 help=_("launch libervia-cli in shell (REPL) mode") |
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49 ) |
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50 cmd.Cmd.__init__(self) |
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51 |
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52 def parse_args(self, args): |
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53 """parse line arguments""" |
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54 return shlex.split(args, posix=True) |
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55 |
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56 def update_path(self): |
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57 self._cur_parser = self.host.parser |
3028 | 58 self.help = "" |
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59 for idx, path_elt in enumerate(self.path): |
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60 try: |
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61 self._cur_parser = arg_tools.get_cmd_choices(path_elt, self._cur_parser) |
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62 except exceptions.NotFound: |
3028 | 63 self.disp(_("bad command path"), error=True) |
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64 self.path = self.path[:idx] |
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65 break |
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66 else: |
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67 self.help = self._cur_parser |
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68 |
3028 | 69 self.prompt = A.color(C.A_PROMPT_PATH, "/".join(self.path)) + A.color( |
70 C.A_PROMPT_SUF, "> " | |
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71 ) |
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72 try: |
3028 | 73 self.actions = list(arg_tools.get_cmd_choices(parser=self._cur_parser).keys()) |
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74 except exceptions.NotFound: |
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75 self.actions = [] |
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76 |
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77 def add_parser_options(self): |
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78 pass |
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79 |
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80 def format_args(self, args): |
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81 """format argument to be printed with quotes if needed""" |
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82 for arg in args: |
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83 if " " in arg: |
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84 yield arg_tools.escape(arg) |
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85 else: |
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86 yield arg |
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87 |
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88 def run_cmd(self, args, external=False): |
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89 """run command and retur exit code |
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90 |
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91 @param args[list[string]]: arguments of the command |
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92 must not include program name |
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93 @param external(bool): True if it's an external command (i.e. not libervia-cli) |
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94 @return (int): exit code (0 success, any other int failure) |
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95 """ |
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96 # FIXME: we have to use subprocess |
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97 # and relaunch whole python for now |
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98 # because if host.quit() is called in D-Bus callback |
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99 # GLib quit the whole app without possibility to stop it |
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100 # didn't found a nice way to work around it so far |
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101 # Situation should be better when we'll move away from python-dbus |
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102 if self.verbose: |
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103 self.disp( |
3028 | 104 _("COMMAND {external}=> {args}").format( |
105 external=_("(external) ") if external else "", | |
106 args=" ".join(self.format_args(args)), | |
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107 ) |
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108 ) |
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109 if not external: |
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110 args = sys.argv[0:1] + args |
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111 ret_code = subprocess.call(args) |
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112 # XXX: below is a way to launch the command without creating a new process |
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113 # may be used when a solution to the aforementioned issue is there |
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114 # try: |
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115 # self.host._run(args) |
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116 # except SystemExit as e: |
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117 # ret_code = e.code |
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118 # except Exception as e: |
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119 # self.disp(A.color(C.A_FAILURE, u'command failed with an exception: {msg}'.format(msg=e)), error=True) |
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120 # ret_code = 1 |
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121 # else: |
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122 # ret_code = 0 |
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123 |
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124 if ret_code != 0: |
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125 self.disp( |
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126 A.color( |
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127 C.A_FAILURE, |
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129 err_no=ret_code |
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130 ), |
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131 ), |
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132 error=True, |
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133 ) |
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134 return ret_code |
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135 |
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136 def default(self, args): |
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137 """called when no shell command is recognized |
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138 |
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139 will launch the command with args on the line |
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140 (i.e. will launch do [args]) |
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141 """ |
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142 if args == "EOF": |
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143 self.do_quit("") |
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144 self.do_do(args) |
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145 |
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146 def do_help(self, args): |
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147 """show help message""" |
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148 if not args: |
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149 self.disp(A.color(C.A_HEADER, _("Shell commands:")), end=' ') |
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150 super(Shell, self).do_help(args) |
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151 if not args: |
3028 | 152 self.disp(A.color(C.A_HEADER, _("Action commands:"))) |
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153 help_list = self._cur_parser.format_help().split("\n\n") |
3028 | 154 print(("\n\n".join(help_list[1 if self.path else 2 :]))) |
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155 |
3040 | 156 # FIXME: debug crashes on exit and is not that useful, |
157 # keeping it until refactoring, may be removed entirely then | |
158 # def do_debug(self, args): | |
159 # """launch internal debugger""" | |
160 # try: | |
161 # import ipdb as pdb | |
162 # except ImportError: | |
163 # import pdb | |
164 # pdb.set_trace() | |
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165 |
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166 def do_verbose(self, args): |
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167 """show verbose mode, or (de)activate it""" |
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168 args = self.parse_args(args) |
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169 if args: |
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170 self.verbose = C.bool(args[0]) |
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171 self.disp( |
3028 | 172 _("verbose mode is {status}").format( |
173 status=_("ENABLED") if self.verbose else _("DISABLED") | |
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174 ) |
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175 ) |
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176 |
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177 def do_cmd(self, args): |
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178 """change command path""" |
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179 if args == "..": |
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180 self.path = self.path[:-1] |
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181 else: |
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182 if not args or args[0] == "/": |
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183 self.path = [] |
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184 args = "/".join(args.split()) |
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185 for path_elt in args.split("/"): |
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186 path_elt = path_elt.strip() |
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187 if not path_elt: |
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188 continue |
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189 self.path.append(path_elt) |
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190 self.update_path() |
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191 |
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192 def do_version(self, args): |
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193 """show current backend/CLI version""" |
3040 | 194 self.run_cmd(['--version']) |
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195 |
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196 def do_shell(self, args): |
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197 """launch an external command (you can use ![command] too)""" |
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198 args = self.parse_args(args) |
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199 self.run_cmd(args, external=True) |
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200 |
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201 def do_do(self, args): |
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202 """lauch a command""" |
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203 args = self.parse_args(args) |
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204 if ( |
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205 self._not_default_profile |
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206 and not "-p" in args |
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207 and not "--profile" in args |
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208 and not "profile" in self.use |
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209 ): |
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210 # profile is not specified and we are not using the default profile |
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211 # so we need to add it in arguments to use current user profile |
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212 if self.verbose: |
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213 self.disp( |
3028 | 214 _("arg profile={profile} (logged profile)").format( |
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215 profile=self.profile |
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216 ) |
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217 ) |
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218 use = self.use.copy() |
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219 use["profile"] = self.profile |
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220 else: |
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221 use = self.use |
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222 |
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223 # args may be modified by use_args |
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224 # to remove subparsers from it |
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225 parser_args, use_args = arg_tools.get_use_args( |
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226 self.host, args, use, verbose=self.verbose, parser=self._cur_parser |
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227 ) |
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228 cmd_args = self.path + parser_args + use_args |
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229 self.run_cmd(cmd_args) |
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230 |
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231 def do_use(self, args): |
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232 """fix an argument""" |
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233 args = self.parse_args(args) |
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234 if not args: |
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235 if not self.use: |
3028 | 236 self.disp(_("no argument in USE")) |
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237 else: |
3028 | 238 self.disp(_("arguments in USE:")) |
239 for arg, value in self.use.items(): | |
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240 self.disp( |
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241 _( |
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242 A.color( |
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243 C.A_SUBHEADER, |
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244 arg, |
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245 A.RESET, |
3028 | 246 " = ", |
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247 arg_tools.escape(value), |
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248 ) |
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249 ) |
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250 ) |
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251 elif len(args) != 2: |
3028 | 252 self.disp("bad syntax, please use:\nuse [arg] [value]", error=True) |
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253 else: |
3028 | 254 self.use[args[0]] = " ".join(args[1:]) |
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255 if self.verbose: |
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256 self.disp( |
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257 "set {name} = {value}".format( |
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258 name=args[0], value=arg_tools.escape(args[1]) |
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259 ) |
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260 ) |
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261 |
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262 def do_use_clear(self, args): |
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263 """unset one or many argument(s) in USE, or all of them if no arg is specified""" |
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264 args = self.parse_args(args) |
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265 if not args: |
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266 self.use.clear() |
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267 else: |
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268 for arg in args: |
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269 try: |
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270 del self.use[arg] |
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271 except KeyError: |
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272 self.disp( |
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273 A.color( |
3028 | 274 C.A_FAILURE, _("argument {name} not found").format(name=arg) |
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275 ), |
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276 error=True, |
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277 ) |
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278 else: |
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279 if self.verbose: |
3028 | 280 self.disp(_("argument {name} removed").format(name=arg)) |
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281 |
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282 def do_whoami(self, args): |
3028 | 283 """print profile currently used""" |
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284 self.disp(self.profile) |
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285 |
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286 def do_quit(self, args): |
3028 | 287 """quit the shell""" |
288 self.disp(_("good bye!")) | |
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289 self.host.quit() |
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290 |
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291 def do_exit(self, args): |
3028 | 292 """alias for quit""" |
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293 self.do_quit(args) |
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294 |
3040 | 295 async def start(self): |
296 # FIXME: "shell" is currently kept synchronous as it works well as it | |
297 # and it will be refactored soon. | |
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298 default_profile = self.host.bridge.profile_name_get(C.PROF_KEY_DEFAULT) |
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299 self._not_default_profile = self.profile != default_profile |
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300 self.path = [] |
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301 self._cur_parser = self.host.parser |
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302 self.use = {} |
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303 self.verbose = False |
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304 self.update_path() |
3040 | 305 self.cmdloop(INTRO) |