comparison mod_discodot/mod_discodot.lua @ 4577:253df0798996

mod_discodot: Print a graph of service discovery
author Kim Alvefur <zash@zash.se>
date Thu, 27 May 2021 17:23:43 +0200
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4576:cade5dac1003 4577:253df0798996
1 local cm = require("core.configmanager");
2
3 local function format_host(host, conf)
4 if host == "*" then
5 return "Global"
6 end
7 local component_module = conf["component_module"];
8 if type(component_module) == "string" then
9 if component_module == "component" then
10 return string.format("Component %q", host)
11 else
12 return string.format("Component %q %q", host, component_module)
13 end
14 else
15 return string.format("VirtualHost %q", host)
16 end
17 end
18
19 function module.command(arg)
20
21 local config = cm.getconfig();
22
23 print("digraph \"prosody\" {")
24 for host, conf in pairs(config) do
25 print(string.format("%q [label=%q]", host, format_host(host, conf)));
26 local parent = host:match("%.(.*)");
27 if parent and rawget(config, parent) then
28 print(string.format("%q -> %q", parent, host));
29 end
30 local disco_items = conf["disco_items"]
31 if type(disco_items) == "table" then
32 for _, pair in ipairs(disco_items) do
33 print(string.format("%q -> %q", host, pair[1]));
34 end
35 end
36
37 end
38
39 print("}")
40
41 return 0
42 end