Mercurial > libervia-backend

annotate frontends/src/jp/cmd_shell.py @ 2315:8d9bd5d77336

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jp (arg_tools): moved get_cmd_choices, get_use_args and escape to a new arg_tools module, so they can be used in other commands than shell
author Goffi <goffi@goffi.org>
date Sat, 08 Jul 2017 21:45:14 +0200
parents 6ff5212997c7
children f4e05600577b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # jp: a SàT command line tool
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5 # Copyright (C) 2009-2016 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 base
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22 import cmd
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23 import sys
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24 from sat.core.i18n import _
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25 from sat.core import exceptions
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26 from sat_frontends.jp.constants import Const as C
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27 from sat_frontends.jp import arg_tools
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28 from sat.tools.common.ansi import ANSI as A
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29 import shlex
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30 import subprocess
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31
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32 __commands__ = ["Shell"]
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33 INTRO = _(u"""Welcome to {app_name} shell, the Salut à Toi shell !
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34
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35 This enrironment helps you using several {app_name} commands with similar parameters.
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36
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37 To quit, just enter "quit" or press C-c.
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38 Enter "help" or "?" to know what to do
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39 """).format(app_name = C.APP_NAME)
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40
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41
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42 class Shell(base.CommandBase, cmd.Cmd):
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43
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44 def __init__(self, host):
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45 base.CommandBase.__init__(self, host, 'shell', help=_(u'launch jp in shell (REPL) mode'))
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46 cmd.Cmd.__init__(self)
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47
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48 def parse_args(self, args):
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49 """parse line arguments"""
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50 return shlex.split(args, posix=True)
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51
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52 def update_path(self):
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53 self._cur_parser = self.host.parser
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54 self.help = u''
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55 for idx, path_elt in enumerate(self.path):
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56 try:
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57 self._cur_parser = arg_tools.get_cmd_choices(path_elt, self._cur_parser)
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58 except exceptions.NotFound:
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59 self.disp(_(u'bad command path'), error=True)
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60 self.path=self.path[:idx]
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61 break
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62 else:
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63 self.help = self._cur_parser
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64
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65 self.prompt = A.color(C.A_PROMPT_PATH, u'/'.join(self.path)) + A.color(C.A_PROMPT_SUF, u'> ')
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66 try:
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67 self.actions = arg_tools.get_cmd_choices(parser=self._cur_parser).keys()
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68 except exceptions.NotFound:
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69 self.actions = []
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70
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71 def add_parser_options(self):
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72 pass
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73
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74 def format_args(self, args):
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75 """format argument to be printed with quotes if needed"""
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76 for arg in args:
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77 if " " in arg:
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78 yield arg_tools.escape(arg)
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79 else:
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80 yield arg
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81
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82 def run_cmd(self, args, external=False):
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83 """run command and retur exit code
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84
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85 @param args[list[string]]: arguments of the command
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86 must not include program name
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87 @param external(bool): True if it's an external command (i.e. not jp)
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88 @return (int): exit code (0 success, any other int failure)
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89 """
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90 # FIXME: we have to use subprocess
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91 # and relaunch whole python for now
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92 # because if host.quit() is called in D-Bus callback
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93 # GLib quit the whole app without possibility to stop it
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94 # didn't found a nice way to work around it so far
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95 # Situation should be better when we'll move away from python-dbus
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96 if self.verbose:
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97 self.disp(_(u"COMMAND {external}=> {args}").format(
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98 external = _(u'(external) ') if external else u'',
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99 args=u' '.join(self.format_args(args))))
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100 if not external:
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101 args = sys.argv[0:1] + args
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102 ret_code= subprocess.call(args)
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103 # XXX: below is a way to launch the command without creating a new process
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104 # may be used when a solution to the aforementioned issue is there
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105 # try:
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106 # self.host.run(args)
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107 # except SystemExit as e:
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108 # ret_code = e.code
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109 # except Exception as e:
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110 # self.disp(A.color(C.A_FAILURE, u'command failed with an exception: {msg}'.format(msg=e)), error=True)
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111 # ret_code = 1
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112 # else:
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113 # ret_code = 0
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114
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115 if ret_code != 0:
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116 self.disp(A.color(C.A_FAILURE, u'command failed with an error code of {err_no}'.format(err_no=ret_code)), error=True)
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117 return ret_code
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118
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119 def default(self, args):
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120 """called when no shell command is recognized
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121
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122 will launch the command with args on the line
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123 (i.e. will launch do [args])
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124 """
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125 self.do_do(args)
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126
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127 def do_help(self, args):
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128 """show help message"""
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129 if not args:
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130 self.disp(A.color(C.A_HEADER, _(u'Shell commands:')), no_lf=True)
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131 super(Shell, self).do_help(args)
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132 if not args:
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133 self.disp(A.color(C.A_HEADER, _(u'Action commands:')))
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134 help_list = self._cur_parser.format_help().split('\n\n')
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135 print('\n\n'.join(help_list[1 if self.path else 2:]))
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136
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137 def do_debug(self, args):
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138 """launch internal debugger"""
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139 try:
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140 import ipdb as pdb
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141 except ImportError:
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142 import pdb
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143 pdb.set_trace()
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144
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145 def do_verbose(self, args):
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146 """show verbose mode, or (de)activate it"""
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147 args = self.parse_args(args)
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148 if args:
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149 self.verbose = C.bool(args[0])
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150 self.disp(_(u'verbose mode is {status}').format(
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151 status = _(u'ENABLED') if self.verbose else _(u'DISABLED')))
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152
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153 def do_cmd(self, args):
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154 """change command path"""
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155 if args == '..':
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156 self.path = self.path[:-1]
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157 else:
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158 if not args or args[0] == '/':
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159 self.path = []
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160 args = '/'.join(args.split())
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161 for path_elt in args.split('/'):
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162 path_elt = path_elt.strip()
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163 if not path_elt:
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164 continue
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165 self.path.append(path_elt)
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166 self.update_path()
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167
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168 def do_version(self, args):
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169 """show current SàT/jp version"""
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170 try:
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171 self.host.run(['--version'])
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172 except SystemExit:
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173 pass
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174
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parents: 2311
diff changeset
175 def do_shell(self, args):
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parents: 2311
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176 """launch an external command (you can use ![command] too)"""
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parents: 2311
diff changeset
177 args = self.parse_args(args)
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178 self.run_cmd(args, external=True)
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179
2309
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180 def do_do(self, args):
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181 """lauch a command"""
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182 args = self.parse_args(args)
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183 # args may be modified by use_args
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184 # to remove subparsers from it
2315
8d9bd5d77336 jp (arg_tools): moved get_cmd_choices, get_use_args and escape to a new arg_tools module, so they can be used in other commands than shell
Goffi <goffi@goffi.org>
parents: 2313
diff changeset
185 use_args = arg_tools.get_use_args(self.host,
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parents: 2313
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186 args,
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187 self.use,
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Goffi <goffi@goffi.org>
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diff changeset
188 verbose=self.verbose,
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Goffi <goffi@goffi.org>
parents: 2313
diff changeset
189 parser=self._cur_parser
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190 )
2309
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191 cmd_args = self.path + use_args + args
2313
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192 self.run_cmd(cmd_args)
2309
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193
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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194 def do_use(self, args):
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195 """fix an argument"""
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196 args = self.parse_args(args)
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197 if not args:
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198 if not self.use:
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199 self.disp(_(u'no argument in USE'))
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200 else:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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201 self.disp(_(u'arguments in USE:'))
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202 for arg, value in self.use.iteritems():
2315
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Goffi <goffi@goffi.org>
parents: 2313
diff changeset
203 self.disp(_(A.color(C.A_SUBHEADER, arg, A.RESET, u' = ', arg_tools.escape(value))))
2309
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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204 elif len(args) != 2:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
205 self.disp(u'bad syntax, please use:\nuse [arg] [value]', error=True)
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
206 else:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
207 self.use[args[0]] = u' '.join(args[1:])
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diff changeset
208 if self.verbose:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
209 self.disp('set {name} = {value}'.format(
2315
8d9bd5d77336 jp (arg_tools): moved get_cmd_choices, get_use_args and escape to a new arg_tools module, so they can be used in other commands than shell
Goffi <goffi@goffi.org>
parents: 2313
diff changeset
210 name = args[0], value=arg_tools.escape(args[1])))
2309
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211
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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212 def do_use_clear(self, args):
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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213 """unset one or many argument(s) in USE, or all of them if no arg is specified"""
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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214 args = self.parse_args(args)
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
215 if not args:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
216 self.use.clear()
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
217 else:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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parents:
diff changeset
218 for arg in args:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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parents:
diff changeset
219 try:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
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diff changeset
220 del self.use[arg]
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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parents:
diff changeset
221 except KeyError:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
222 self.disp(A.color(C.A_FAILURE, _(u'argument {name} not found').format(name=arg)), error=True)
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
223 else:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
224 if self.verbose:
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
225 self.disp(_(u'argument {name} removed').format(name=arg))
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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226
2311
a42a2478abd2 jp (shell): added "whoami" command to print currently used profile
Goffi <goffi@goffi.org>
parents: 2310
diff changeset
227 def do_whoami(self, args):
a42a2478abd2 jp (shell): added "whoami" command to print currently used profile
Goffi <goffi@goffi.org>
parents: 2310
diff changeset
228 u"""print profile currently used"""
a42a2478abd2 jp (shell): added "whoami" command to print currently used profile
Goffi <goffi@goffi.org>
parents: 2310
diff changeset
229 self.disp(self.profile)
a42a2478abd2 jp (shell): added "whoami" command to print currently used profile
Goffi <goffi@goffi.org>
parents: 2310
diff changeset
230
2309
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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diff changeset
231 def do_quit(self, args):
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
232 u"""quit the shell"""
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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parents:
diff changeset
233 self.disp(_(u'good bye!'))
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
234 self.host.quit()
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
235
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
236 def do_exit(self, args):
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
237 u"""alias for quit"""
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
238 self.do_quit(args)
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
239
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
240 def start(self):
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
241 self.path = []
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
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parents:
diff changeset
242 self._cur_parser = self.host.parser
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
243 self.use = {}
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
244 self.verbose = False
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
245 self.update_path()
c7a72b75232b jp (shell): shell command (REPL mode), first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
246 self.cmdloop(INTRO.encode('utf-8'))