annotate libervia/web/server/tasks/task.py @ 1577:9ba532041a8e

browser (chat): implement message reactions.
author Goffi <goffi@goffi.org>
date Wed, 22 Nov 2023 16:31:36 +0100
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children
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1 #!/usr/bin/env python3
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2
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3 # Libervia: a Salut à Toi frontend
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4 # Copyright (C) 2011-2021 Jérôme Poisson <goffi@goffi.org>
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 from twisted.python.procutils import which
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19 from libervia.backend.core.log import getLogger
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20 from libervia.backend.tools.common import async_process
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21 from libervia.backend.core import exceptions
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22 from libervia.backend.core.i18n import _
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23 from typing import Optional
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24
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25 log = getLogger(__name__)
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26
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27
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28 class Task:
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29 """Handle tasks of a Libervia site"""
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30 # can be "stop" or "continue"
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31 ON_ERROR: str = "stop"
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32 LOG_OUTPUT: bool = True
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33 # list of directories to check for restarting this task
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34 # Task.on_dir_event will be called if it exists, otherwise
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35 # the task will be run and Task.start will be called
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36 WATCH_DIRS: Optional[list] = None
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37 # list of task names which must be prepared/started before this one
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38 AFTER: Optional[list] = None
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39
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40 def __init__(self, manager, task_name):
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41 self.manager = manager
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42 self.name = task_name
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43
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44 @property
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45 def host(self):
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46 return self.manager.host
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47
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48 @property
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49 def resource(self):
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50 return self.manager.resource
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51
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52 @property
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53 def site_path(self):
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54 return self.manager.site_path
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55
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56 @property
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57 def build_path(self):
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58 """path where generated files will be build for this site"""
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59 return self.manager.build_path
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60
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61 def config_get(self, key, default=None, value_type=None):
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62 return self.host.config_get(self.resource, key=key, default=default,
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63 value_type=value_type)
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64
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65 @property
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66 def site_name(self):
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67 return self.resource.site_name
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68
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69 def find_command(self, name, *args):
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70 """Find full path of a shell command
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71
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72 @param name(unicode): name of the command to find
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73 @param *args(unicode): extra names the command may have
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74 @return (unicode): full path of the command
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75 @raise exceptions.NotFound: can't find this command
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76 """
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77 names = (name,) + args
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78 for n in names:
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79 try:
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80 cmd_path = which(n)[0]
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81 except IndexError:
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82 pass
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83 else:
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84 return cmd_path
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85 raise exceptions.NotFound(_(
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86 "Can't find {name} command, did you install it?").format(name=name))
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87
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88 def runCommand(self, command, *args, **kwargs):
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89 kwargs['verbose'] = self.LOG_OUTPUT
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90 return async_process.CommandProtocol.run(command, *args, **kwargs)