Last change
on this file since 6c1585f was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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1 | 'use strict';
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2 |
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3 | // See http://www.robvanderwoude.com/escapechars.php
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4 | const metaCharsRegExp = /([()\][%!^"`<>&|;, *?])/g;
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5 |
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6 | function escapeCommand(arg) {
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7 | // Escape meta chars
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8 | arg = arg.replace(metaCharsRegExp, '^$1');
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9 |
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10 | return arg;
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11 | }
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12 |
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13 | function escapeArgument(arg, doubleEscapeMetaChars) {
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14 | // Convert to string
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15 | arg = `${arg}`;
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16 |
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17 | // Algorithm below is based on https://qntm.org/cmd
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18 |
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19 | // Sequence of backslashes followed by a double quote:
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20 | // double up all the backslashes and escape the double quote
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21 | arg = arg.replace(/(\\*)"/g, '$1$1\\"');
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22 |
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23 | // Sequence of backslashes followed by the end of the string
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24 | // (which will become a double quote later):
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25 | // double up all the backslashes
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26 | arg = arg.replace(/(\\*)$/, '$1$1');
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27 |
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28 | // All other backslashes occur literally
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29 |
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30 | // Quote the whole thing:
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31 | arg = `"${arg}"`;
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32 |
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33 | // Escape meta chars
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34 | arg = arg.replace(metaCharsRegExp, '^$1');
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35 |
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36 | // Double escape meta chars if necessary
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37 | if (doubleEscapeMetaChars) {
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38 | arg = arg.replace(metaCharsRegExp, '^$1');
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39 | }
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40 |
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41 | return arg;
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42 | }
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43 |
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44 | module.exports.command = escapeCommand;
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45 | module.exports.argument = escapeArgument;
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