prosody
4d4f9e42bcf8
util/argparse.lua

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util/argparse.lua @ 13211:4d4f9e42bcf8

moduleapi: Add :get_option_integer() Many options in Prosody that are treated as numbers don't make sense as floats, e.g. sizes and limits measured in bytes. Simplified implementation based on an earlier attempt dating back to 2020
author Kim Alvefur <zash@zash.se>
date Mon, 17 Jul 2023 00:09:41 +0200
parent 13160:4ee9a912ceea
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rev   line source
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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 local array_params = config and config.array_params or {};
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5
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6 local parsed_opts = {};
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7
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8 if #arg == 0 then
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9 return parsed_opts;
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10 end
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11 while true do
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12 local raw_param = arg[1];
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13 if not raw_param then
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14 break;
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15 end
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16
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17 local prefix = raw_param:match("^%-%-?");
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18 if not prefix then
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19 break;
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20 elseif prefix == "--" and raw_param == "--" then
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21 table.remove(arg, 1);
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22 break;
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23 end
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24 local param = table.remove(arg, 1):sub(#prefix+1);
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25 if #param == 1 and short_params then
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26 param = short_params[param];
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27 end
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28
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29 if not param then
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30 return nil, "param-not-found", raw_param;
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31 end
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32
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33 local param_k, param_v;
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34 if value_params[param] or array_params[param] then
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35 param_k, param_v = param, table.remove(arg, 1);
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36 if not param_v then
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37 return nil, "missing-value", raw_param;
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38 end
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39 else
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40 param_k, param_v = param:match("^([^=]+)=(.+)$");
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41 if not param_k then
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42 if param:match("^no%-") then
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43 param_k, param_v = param:sub(4), false;
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44 else
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45 param_k, param_v = param, true;
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46 end
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47 end
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48 param_k = param_k:gsub("%-", "_");
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49 end
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50 if array_params[param] then
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51 if parsed_opts[param_k] then
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52 table.insert(parsed_opts[param_k], param_v);
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53 else
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54 parsed_opts[param_k] = { param_v };
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55 end
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56 else
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57 parsed_opts[param_k] = param_v;
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58 end
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59 end
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60 for i = 1, #arg do
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61 parsed_opts[i] = arg[i];
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62 end
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63 return parsed_opts;
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64 end
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65
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66 return {
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67 parse = parse;
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68 }