Mercurial > libervia-backend
annotate sat/core/launcher.py @ 3386:129cc3e16825
docker (prosody_e2e): install `ipcheck` so jp doesn't need to contact external website
author | Goffi <goffi@goffi.org> |
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date | Thu, 12 Nov 2020 14:53:15 +0100 |
parents | 751d8fa45ced |
children | d7cfb031e41f |
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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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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. |
4 | 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 |
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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 |
3028 | 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']) |
463 | 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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132 |
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133 if running: |
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134 print(f"{self.APP_NAME} is running (pid: {pid})") |
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135 sys.exit(0) |
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136 else: |
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137 print(f"{self.NOT_RUNNING_MSG}, but a pid file is present (bad exit ?): {pid_file}") |
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138 sys.exit(2) |
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139 else: |
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140 print(self.NOT_RUNNING_MSG) |
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141 sys.exit(1) |
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142 |
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143 def parse_args(self): |
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144 parser = argparse.ArgumentParser(description=f"Launch {self.APP_NAME} backend") |
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145 parser.set_defaults(cmd=self.cmd_no_subparser) |
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146 subparsers = parser.add_subparsers() |
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147 extra_help = f"arguments to pass to {self.APP_NAME} service" |
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148 |
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149 bg_parser = subparsers.add_parser( |
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150 'background', |
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151 aliases=['bg'], |
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152 help=f"run {self.APP_NAME} backend in background (as a daemon)") |
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153 bg_parser.add_argument('extra_args', nargs=argparse.REMAINDER, help=extra_help) |
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154 bg_parser.set_defaults(cmd=self.cmd_background) |
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155 |
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156 fg_parser = subparsers.add_parser( |
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157 'foreground', |
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158 aliases=['fg'], |
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159 help=f"run {self.APP_NAME} backend in foreground") |
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160 fg_parser.add_argument('extra_args', nargs=argparse.REMAINDER, help=extra_help) |
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161 fg_parser.set_defaults(cmd=self.cmd_foreground) |
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162 |
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163 dbg_parser = subparsers.add_parser( |
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164 'debug', |
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165 aliases=['dbg'], |
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166 help=f"run {self.APP_NAME} backend in debug mode") |
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167 dbg_parser.add_argument('extra_args', nargs=argparse.REMAINDER, help=extra_help) |
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168 dbg_parser.set_defaults(cmd=self.cmd_debug) |
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169 |
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170 stop_parser = subparsers.add_parser( |
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171 'stop', |
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172 help=f"stop running {self.APP_NAME} backend") |
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173 stop_parser.set_defaults(cmd=self.cmd_stop) |
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174 |
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175 status_parser = subparsers.add_parser( |
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176 'status', |
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177 help=f"indicate if {self.APP_NAME} backend is running") |
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178 status_parser.set_defaults(cmd=self.cmd_status) |
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179 |
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180 return parser.parse_args() |
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181 |
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182 def get_config(self): |
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183 config = ConfigParser(defaults=C.DEFAULT_CONFIG) |
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184 try: |
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185 config.read(C.CONFIG_FILES) |
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186 except Exception as e: |
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187 print (rf"/!\ Can't read main config! {e}") |
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188 sys.exit(1) |
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189 return config |
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190 |
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191 def get_pid_file(self, config): |
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192 pid_dir = Path(config.get('DEFAULT', 'pid_dir')).expanduser() |
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193 return pid_dir / f"{self.APP_NAME_FILE}.pid" |
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194 |
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195 def run_twistd(self, args, twistd_opts=None): |
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196 """Run twistd settings options with args""" |
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197 from twisted.python.runtime import platformType |
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198 if platformType == "win32": |
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199 from twisted.scripts._twistw import (ServerOptions, |
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200 WindowsApplicationRunner as app_runner) |
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201 else: |
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202 from twisted.scripts._twistd_unix import (ServerOptions, |
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203 UnixApplicationRunner as app_runner) |
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204 |
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205 app_runner.loggerFactory = SatLogger |
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206 server_options = ServerOptions() |
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207 config = self.get_config() |
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208 pid_file = self.get_pid_file(config) |
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209 log_dir = Path(config.get('DEFAULT', 'log_dir')).expanduser() |
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210 log_file = log_dir / f"{self.APP_NAME_FILE}.log" |
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211 server_opts = [ |
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212 '--no_save', |
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213 '--pidfile', str(pid_file), |
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214 '--logfile', str(log_file), |
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215 ] |
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216 if twistd_opts is not None: |
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217 server_opts.extend(twistd_opts) |
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218 server_opts.append(self.APP_NAME_FILE) |
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219 if args.extra_args: |
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220 try: |
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221 args.extra_args.remove('--') |
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222 except ValueError: |
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223 pass |
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224 server_opts.extend(args.extra_args) |
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225 try: |
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226 server_options.parseOptions(server_opts) |
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227 except usage.error as ue: |
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228 print(server_options) |
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229 print("%s: %s" % (sys.argv[0], ue)) |
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230 sys.exit(1) |
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231 else: |
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232 runner = app_runner(server_options) |
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233 runner.run() |
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234 if runner._exitSignal is not None: |
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235 app._exitWithSignal(runner._exitSignal) |
226
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236 |
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237 @classmethod |
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238 def run(cls): |
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239 args = cls().parse_args() |
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240 args.cmd(args) |
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241 |
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242 |
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243 if __name__ == '__main__': |
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244 Launcher.run() |