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annotate mod_discodot/mod_discodot.tl @ 4764:a754f7e380b2

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mod_dnsupdate: Rewrite port config vs DNS comparison code I'm not sure if it was correct, which means it was hard to understand and thus needed to be simplified. Hope this accomplishes that.
author Kim Alvefur <zash@zash.se>
date Mon, 08 Nov 2021 23:03:14 +0100
parents 253df0798996
children
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253df0798996 mod_discodot: Print a graph of service discovery
Kim Alvefur <zash@zash.se>
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1 local cm = require"core.configmanager";
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2
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3 local function format_host(host:string, conf:{string:any}) : string
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4 if host == "*" then
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5 return "Global";
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6 end
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Kim Alvefur <zash@zash.se>
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7 local component_module = conf["component_module"];
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8 if component_module is string then
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9 if component_module == "component" then
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10 return string.format("Component %q", host);
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11 else
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12 return string.format("Component %q %q", host, component_module);
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13 end
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14 else
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15 return string.format("VirtualHost %q", host);
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16 end
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17 end
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18
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19 function module.command(arg : { string }) : integer
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20
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21 local config : { string : { string : any } } = cm.getconfig();
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22
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23 print"digraph \"prosody\" {"
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24 for host, conf in pairs(config) do
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25 print(string.format("%q [label=%q]", host, format_host(host, conf)));
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26 local parent = host:match("%.(.*)");
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27 if parent and rawget(config, parent) then
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28 print(string.format("%q -> %q", parent, host));
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29 end
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Kim Alvefur <zash@zash.se>
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30 local disco_items = conf["disco_items"]
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31 if disco_items is { { string, string } } then
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32 for _, pair in ipairs(disco_items) do
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33 print(string.format("%q -> %q", host, pair[1]));
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34 end
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35 end
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36
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37 end
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38
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39 print"}"
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40
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41 return 0
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42 end