prosody
1196f1e8d178
util/argparse.lua

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util/argparse.lua @ 10651:1196f1e8d178

util.startup: Break out command line argument parsing into util.argparse This will allow using it from other places such as prosodyctl sub-commands and plugins
author Kim Alvefur <zash@zash.se>
date Wed, 19 Feb 2020 21:38:00 +0100
child 10936:d770435f0f84
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
10651
1196f1e8d178 util.startup: Break out command line argument parsing into util.argparse
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1 local function parse(arg, config)
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2 local short_params = config and config.short_params or {};
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3 local value_params = config and config.value_params or {};
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4
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5 local parsed_opts = {};
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6
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7 if #arg == 0 then
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8 return parsed_opts;
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9 end
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10 while true do
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11 local raw_param = arg[1];
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12 if not raw_param then
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13 break;
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14 end
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15
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16 local prefix = raw_param:match("^%-%-?");
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17 if not prefix then
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18 break;
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19 elseif prefix == "--" and raw_param == "--" then
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20 table.remove(arg, 1);
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21 break;
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22 end
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23 local param = table.remove(arg, 1):sub(#prefix+1);
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24 if #param == 1 and short_params then
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25 param = short_params[param];
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26 end
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27
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28 if not param then
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29 print("Unknown command-line option: "..tostring(param));
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30 print("Perhaps you meant to use prosodyctl instead?");
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31 os.exit(1);
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32 end
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33
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34 local param_k, param_v;
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35 if value_params[param] then
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36 param_k, param_v = param, table.remove(arg, 1);
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37 if not param_v then
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38 print("Expected a value to follow command-line option: "..raw_param);
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39 os.exit(1);
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40 end
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41 else
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42 param_k, param_v = param:match("^([^=]+)=(.+)$");
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43 if not param_k then
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44 if param:match("^no%-") then
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45 param_k, param_v = param:sub(4), false;
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46 else
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47 param_k, param_v = param, true;
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48 end
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49 end
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50 end
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51 parsed_opts[param_k] = param_v;
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52 end
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53 return parsed_opts;
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54 end
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55
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56 return {
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57 parse = parse;
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58 }