escape.js (1172B)
1 'use strict'; 2 3 // See http://www.robvanderwoude.com/escapechars.php 4 const metaCharsRegExp = /([()\][%!^"`<>&|;, *?])/g; 5 6 function escapeCommand(arg) { 7 // Escape meta chars 8 arg = arg.replace(metaCharsRegExp, '^$1'); 9 10 return arg; 11 } 12 13 function escapeArgument(arg, doubleEscapeMetaChars) { 14 // Convert to string 15 arg = `${arg}`; 16 17 // Algorithm below is based on https://qntm.org/cmd 18 19 // Sequence of backslashes followed by a double quote: 20 // double up all the backslashes and escape the double quote 21 arg = arg.replace(/(\\*)"/g, '$1$1\\"'); 22 23 // Sequence of backslashes followed by the end of the string 24 // (which will become a double quote later): 25 // double up all the backslashes 26 arg = arg.replace(/(\\*)$/, '$1$1'); 27 28 // All other backslashes occur literally 29 30 // Quote the whole thing: 31 arg = `"${arg}"`; 32 33 // Escape meta chars 34 arg = arg.replace(metaCharsRegExp, '^$1'); 35 36 // Double escape meta chars if necessary 37 if (doubleEscapeMetaChars) { 38 arg = arg.replace(metaCharsRegExp, '^$1'); 39 } 40 41 return arg; 42 } 43 44 module.exports.command = escapeCommand; 45 module.exports.argument = escapeArgument;