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annotate mod_inotify_reload/mod_inotify_reload.lua @ 5383:df11a2cbc7b7

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mod_http_oauth2: Implement RFC 7628 Proof Key for Code Exchange Likely to become mandatory in OAuth 2.1. Backwards compatible since the default 'plain' verifier would compare nil with nil if the relevant parameters are left out.
author Kim Alvefur <zash@zash.se>
date Sat, 29 Apr 2023 13:09:46 +0200
parents ab988e98a9f9
children 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