prosody
cc84682b8429
util/argparse.lua

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util/argparse.lua @ 12477:cc84682b8429 0.12

util.argparse: Revise 553c6204fe5b with a different approach The second return value is (not insensibly) assumed to be an error. Instead of returning a value there in the success case, copy the positional arguments into the existing opts table.
author Matthew Wild <mwild1@gmail.com>
date Mon, 25 Apr 2022 15:24:56 +0100
parent 12475:553c6204fe5b
child 13058:766152afc1c9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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
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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 return nil, "param-not-found", raw_param;
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30 end
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31
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32 local param_k, param_v;
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33 if value_params[param] then
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34 param_k, param_v = param, table.remove(arg, 1);
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35 if not param_v then
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36 return nil, "missing-value", raw_param;
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37 end
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38 else
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39 param_k, param_v = param:match("^([^=]+)=(.+)$");
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40 if not param_k then
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41 if param:match("^no%-") then
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42 param_k, param_v = param:sub(4), false;
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43 else
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44 param_k, param_v = param, true;
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45 end
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46 end
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47 end
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48 parsed_opts[param_k] = param_v;
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49 end
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50 for i = 1, #arg do
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51 parsed_opts[i] = arg[i];
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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 }