Mercurial > libervia-backend

annotate sat/core/launcher.py @ 3374:47755614b82a

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jp (application): new `application` (or `app`) commands: those commands allow to: - list available SàT applications - start an application - stop an application - display/get exposed values
author Goffi <goffi@goffi.org>
date Mon, 28 Sep 2020 21:10:33 +0200
parents 751d8fa45ced
children d7cfb031e41f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2
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3 # SàT: an XMPP client
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4 # Copyright (C) 2009-2020 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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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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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
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19 """Script launching SàT backend"""
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20
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21 import sys
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22 import os
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23 import argparse
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24 from pathlib import Path
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25 from configparser import ConfigParser
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26 from os.path import expanduser, join
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27 from twisted.application import app
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28 from twisted.python import usage
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29 from sat.core.constants import Const as C
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30
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31
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32 class SatLogger(app.AppLogger):
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33
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34 def start(self, application):
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35 # logging is initialised by sat.core.log_config via the Twisted plugin, nothing
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36 # to do here
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37 self._initialLog()
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38
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39 def stop(self):
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40 pass
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41
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42
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43 class Launcher:
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44 APP_NAME=C.APP_NAME
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45 APP_NAME_FILE=C.APP_NAME_FILE
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46
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47 @property
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48 def NOT_RUNNING_MSG(self):
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49 return f"{self.APP_NAME} is *NOT* running"
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50
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51 def cmd_no_subparser(self, args):
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52 """Command launched by default"""
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53 args.extra_args = []
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54 self.cmd_background(args)
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55
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56 def cmd_background(self, args):
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57 self.run_twistd(args)
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58
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59 def cmd_foreground(self, args):
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60 self.run_twistd(args, twistd_opts=['--nodaemon'])
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61
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62 def cmd_debug(self, args):
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63 self.run_twistd(args, twistd_opts=['--debug'])
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64
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65 def cmd_stop(self, args):
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66 import signal
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67 import time
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68 config = self.get_config()
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69 pid_file = self.get_pid_file(config)
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70 if not pid_file.is_file():
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71 print(self.NOT_RUNNING_MSG)
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72 sys.exit(0)
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73 try:
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74 pid = int(pid_file.read_text())
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75 except Exception as e:
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76 print(f"Can't read PID file at {pid_file}: {e}")
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77 # we use the same exit code as DATA_ERROR in jp
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78 sys.exit(17)
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79 print(f"Terminating {self.APP_NAME}…")
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80 os.kill(pid, signal.SIGTERM)
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81 kill_started = time.time()
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82 state = "init"
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83 import errno
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84 while True:
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85 try:
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86 os.kill(pid, 0)
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87 except OSError as e:
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88 if e.errno == errno.ESRCH:
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89 break
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90 elif e.errno == errno.EPERM:
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91 print(f"Can't kill {self.APP_NAME}, the process is owned by an other user", file=sys.stderr)
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92 sys.exit(18)
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93 else:
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94 raise e
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95 time.sleep(0.2)
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96 now = time.time()
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97 if state == 'init' and now - kill_started > 5:
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98 if state == 'init':
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99 state = 'waiting'
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100 print(f"Still waiting for {self.APP_NAME} to be terminated…")
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101 elif state == 'waiting' and now - kill_started > 10:
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102 state == 'killing'
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103 print(f"Waiting for too long, we kill the process")
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104 os.kill(pid, signal.SIGKILL)
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105 sys.exit(1)
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106
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107 sys.exit(0)
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108
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109 def cmd_status(self, args):
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110 config = self.get_config()
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111 pid_file = self.get_pid_file(config)
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112 if pid_file.is_file():
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113 import errno
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114 try:
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115 pid = int(pid_file.read_text())
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116 except Exception as e:
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117 print(f"Can't read PID file at {pid_file}: {e}")
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118 # we use the same exit code as DATA_ERROR in jp
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119 sys.exit(17)
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120 # we check if there is a process
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121 # inspired by https://stackoverflow.com/a/568285 and https://stackoverflow.com/a/6940314
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122 try:
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123 os.kill(pid, 0)
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124 except OSError as e:
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125 if e.errno == errno.ESRCH:
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126 running = False
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127 elif e.errno == errno.EPERM:
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128 print("Process {pid} is run by an other user")
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129 running = True
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130 else:
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131 running = True
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parents: 930
diff changeset
132
3281
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diff changeset
133 if running:
a3639d6d9643 core: replaced `sat` shell script by a python script:
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parents: 3263
diff changeset
134 print(f"{self.APP_NAME} is running (pid: {pid})")
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parents: 3263
diff changeset
135 sys.exit(0)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
136 else:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
137 print(f"{self.NOT_RUNNING_MSG}, but a pid file is present (bad exit ?): {pid_file}")
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parents: 3263
diff changeset
138 sys.exit(2)
a3639d6d9643 core: replaced `sat` shell script by a python script:
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parents: 3263
diff changeset
139 else:
a3639d6d9643 core: replaced `sat` shell script by a python script:
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parents: 3263
diff changeset
140 print(self.NOT_RUNNING_MSG)
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parents: 3263
diff changeset
141 sys.exit(1)
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diff changeset
142
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Goffi <goffi@goffi.org>
parents: 3263
diff changeset
143 def parse_args(self):
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
144 parser = argparse.ArgumentParser(description=f"Launch {self.APP_NAME} backend")
3284
751d8fa45ced core (launcher): fixed launching of twistd when no subparsed is specified
Goffi <goffi@goffi.org>
parents: 3282
diff changeset
145 parser.set_defaults(cmd=self.cmd_no_subparser)
3281
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parents: 3263
diff changeset
146 subparsers = parser.add_subparsers()
3282
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Goffi <goffi@goffi.org>
parents: 3281
diff changeset
147 extra_help = f"arguments to pass to {self.APP_NAME} service"
3281
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diff changeset
148
a3639d6d9643 core: replaced `sat` shell script by a python script:
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diff changeset
149 bg_parser = subparsers.add_parser(
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parents: 3263
diff changeset
150 'background',
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
151 aliases=['bg'],
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
152 help=f"run {self.APP_NAME} backend in background (as a daemon)")
3282
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
153 bg_parser.add_argument('extra_args', nargs=argparse.REMAINDER, help=extra_help)
3281
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parents: 3263
diff changeset
154 bg_parser.set_defaults(cmd=self.cmd_background)
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parents: 3263
diff changeset
155
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
156 fg_parser = subparsers.add_parser(
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
157 'foreground',
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
158 aliases=['fg'],
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
159 help=f"run {self.APP_NAME} backend in foreground")
3282
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Goffi <goffi@goffi.org>
parents: 3281
diff changeset
160 fg_parser.add_argument('extra_args', nargs=argparse.REMAINDER, help=extra_help)
3281
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parents: 3263
diff changeset
161 fg_parser.set_defaults(cmd=self.cmd_foreground)
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parents: 3263
diff changeset
162
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
163 dbg_parser = subparsers.add_parser(
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
164 'debug',
3282
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
165 aliases=['dbg'],
3281
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
166 help=f"run {self.APP_NAME} backend in debug mode")
3282
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
167 dbg_parser.add_argument('extra_args', nargs=argparse.REMAINDER, help=extra_help)
3281
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
168 dbg_parser.set_defaults(cmd=self.cmd_debug)
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parents: 3263
diff changeset
169
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
170 stop_parser = subparsers.add_parser(
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
171 'stop',
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
172 help=f"stop running {self.APP_NAME} backend")
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Goffi <goffi@goffi.org>
parents: 3263
diff changeset
173 stop_parser.set_defaults(cmd=self.cmd_stop)
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parents: 3263
diff changeset
174
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
175 status_parser = subparsers.add_parser(
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
176 'status',
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
177 help=f"indicate if {self.APP_NAME} backend is running")
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
178 status_parser.set_defaults(cmd=self.cmd_status)
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Goffi <goffi@goffi.org>
parents: 3263
diff changeset
179
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
180 return parser.parse_args()
931
3b30e9f83d88 misc: sat stop would not kill all sat instances anymore
souliane <souliane@mailoo.org>
parents: 930
diff changeset
181
3281
a3639d6d9643 core: replaced `sat` shell script by a python script:
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diff changeset
182 def get_config(self):
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
183 config = ConfigParser(defaults=C.DEFAULT_CONFIG)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
184 try:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
185 config.read(C.CONFIG_FILES)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
186 except Exception as e:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
187 print (rf"/!\ Can't read main config! {e}")
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
188 sys.exit(1)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
189 return config
225
fd9b7834d98a distutils installation script, draft
Goffi <goffi@goffi.org>
parents: 223
diff changeset
190
3281
a3639d6d9643 core: replaced `sat` shell script by a python script:
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diff changeset
191 def get_pid_file(self, config):
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
192 pid_dir = Path(config.get('DEFAULT', 'pid_dir')).expanduser()
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
193 return pid_dir / f"{self.APP_NAME_FILE}.pid"
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
194
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
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diff changeset
195 def run_twistd(self, args, twistd_opts=None):
a3639d6d9643 core: replaced `sat` shell script by a python script:
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parents: 3263
diff changeset
196 """Run twistd settings options with args"""
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
197 from twisted.python.runtime import platformType
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
198 if platformType == "win32":
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
199 from twisted.scripts._twistw import (ServerOptions,
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
200 WindowsApplicationRunner as app_runner)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
201 else:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
202 from twisted.scripts._twistd_unix import (ServerOptions,
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
203 UnixApplicationRunner as app_runner)
225
fd9b7834d98a distutils installation script, draft
Goffi <goffi@goffi.org>
parents: 223
diff changeset
204
3281
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
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diff changeset
205 app_runner.loggerFactory = SatLogger
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
206 server_options = ServerOptions()
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
207 config = self.get_config()
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
208 pid_file = self.get_pid_file(config)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
209 log_dir = Path(config.get('DEFAULT', 'log_dir')).expanduser()
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
210 log_file = log_dir / f"{self.APP_NAME_FILE}.log"
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
211 server_opts = [
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
212 '--no_save',
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
213 '--pidfile', str(pid_file),
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
214 '--logfile', str(log_file),
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
215 ]
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
216 if twistd_opts is not None:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
217 server_opts.extend(twistd_opts)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
218 server_opts.append(self.APP_NAME_FILE)
3282
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
219 if args.extra_args:
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
220 try:
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
221 args.extra_args.remove('--')
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
222 except ValueError:
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
223 pass
e7e7be79fbcd core (launcher): extra arguments can now be passed the service with `bg`, `fg` and `dbg`:
Goffi <goffi@goffi.org>
parents: 3281
diff changeset
224 server_opts.extend(args.extra_args)
3281
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
225 try:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
226 server_options.parseOptions(server_opts)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
227 except usage.error as ue:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
228 print(server_options)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
229 print("%s: %s" % (sys.argv[0], ue))
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
230 sys.exit(1)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
231 else:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
232 runner = app_runner(server_options)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
233 runner.run()
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
234 if runner._exitSignal is not None:
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
235 app._exitWithSignal(runner._exitSignal)
226
d8bb72f00eec distutils install: fixed plugin import and log file path
Goffi <goffi@goffi.org>
parents: 225
diff changeset
236
3281
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
237 @classmethod
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
238 def run(cls):
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
239 args = cls().parse_args()
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
240 args.cmd(args)
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
241
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
242
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
243 if __name__ == '__main__':
a3639d6d9643 core: replaced `sat` shell script by a python script:
Goffi <goffi@goffi.org>
parents: 3263
diff changeset
244 Launcher.run()