prosody-modules
94805a7e7b30
mod_inotify_reload/mod_inotify_reload.lua

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mod_inotify_reload/mod_inotify_reload.lua @ 4421:94805a7e7b30

mod_invites: rework CLI parsing to support groups To make this sensible, the code had to move from rather simple parsing to something which looks more like getopt or your typical shell script.
author Jonas Schäfer <jonas@wielicki.name>
date Sun, 31 Jan 2021 19:16:36 +0100
parent 744:ab988e98a9f9
child 5395:82207f936f1f
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1 -- mod_inotify_reload
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2 -- Reloads modules when their files change
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3 -- Depends on linotify: https://github.com/hoelzro/linotify
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4
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5 module:set_global();
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6
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7 local inotify = require "inotify";
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8 local modulemanager = require "core.modulemanager";
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9
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10 local inh = inotify.init();
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11
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12 local watches = {};
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13 local watch_ids = {};
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14
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15 -- Fake socket object around inotify
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16 local inh_conn = {
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17 getfd = function () return inh:fileno(); end;
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18 dirty = function (self) return false; end;
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19 settimeout = function () end;
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20 send = function (_, d) return #d, 0; end;
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21 close = function () end;
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22 receive = function ()
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23 local events = inh:read();
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24 for _, event in ipairs(events) do
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25 local mod = watches[watch_ids[event.wd]];
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26 if mod then
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27 local host, name = mod.host, mod.name;
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28 module:log("debug", "Reloading changed module mod_%s on %s", name, host);
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29 modulemanager.reload(host, name);
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30 else
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31 module:log("warn", "no watch for %d", event.wd);
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32 end
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33 end
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34 return "";
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35 end
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36 };
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37 require "net.server".wrapclient(inh_conn, "inotify", inh:fileno(), {
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38 onincoming = function () end, ondisconnect = function () end
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39 }, "*a");
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40
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41 function watch_module(name, host, path)
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42 local id, err = inh:addwatch(path, inotify.IN_CLOSE_WRITE);
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43 if not id then return nil, err; end
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44 local k = host.."\0"..name;
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45 watches[k] = { id = id, path = path, name = name, host = host };
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46 watch_ids[id] = k;
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47 module:log("debug", "Watching %s:%s with id %d", name, host, id);
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48 return true;
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49 end
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50
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51 function unwatch_module(name, host)
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52 local k = host.."\0"..name;
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53 if not watches[k] then
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54 module:log("warn", "Not watching %s:%s", name, host);
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55 return nil, "not-watching";
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56 end
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57 local id = watches[k].id;
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58 local ok, err = inh:rmwatch(id);
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59 module:log("info", "Removed watch %d", id);
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60 watches[k] = nil;
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61 watch_ids[id] = nil;
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62 return ok, err;
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63 end
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64
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65 function module_loaded(event)
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66 local host, name = event.host, event.module;
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67 local path = modulemanager.get_module(host, name).module.path;
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68 if not path then
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69 module:log("warn", "Couldn't watch mod_%s, no path", name);
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70 return;
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71 end
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72 if watch_module(name, host, path) then
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73 module:log("debug", "Watching mod_%s", name);
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74 end
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75 end
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76
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77 function module_unloaded(event)
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78 unwatch_module(event.module, event.host);
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79 end
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80
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81 function module.add_host(module)
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82 module:hook("module-loaded", module_loaded);
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83 module:hook("module-unloaded", module_unloaded);
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84 end
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85
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86 module:hook("module-loaded", module_loaded);
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87 module:hook("module-unloaded", module_unloaded);
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88