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45 lines
1.1 KiB
45 lines
1.1 KiB
'use strict'; |
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// See http://www.robvanderwoude.com/escapechars.php |
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const metaCharsRegExp = /([()\][%!^"`<>&|;, *?])/g; |
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function escapeCommand(arg) { |
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// Escape meta chars |
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arg = arg.replace(metaCharsRegExp, '^$1'); |
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return arg; |
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} |
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function escapeArgument(arg, doubleEscapeMetaChars) { |
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// Convert to string |
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arg = `${arg}`; |
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// Algorithm below is based on https://qntm.org/cmd |
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// Sequence of backslashes followed by a double quote: |
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// double up all the backslashes and escape the double quote |
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arg = arg.replace(/(\\*)"/g, '$1$1\\"'); |
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// Sequence of backslashes followed by the end of the string |
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// (which will become a double quote later): |
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// double up all the backslashes |
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arg = arg.replace(/(\\*)$/, '$1$1'); |
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// All other backslashes occur literally |
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// Quote the whole thing: |
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arg = `"${arg}"`; |
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// Escape meta chars |
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arg = arg.replace(metaCharsRegExp, '^$1'); |
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// Double escape meta chars if necessary |
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if (doubleEscapeMetaChars) { |
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arg = arg.replace(metaCharsRegExp, '^$1'); |
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} |
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return arg; |
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} |
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module.exports.command = escapeCommand; |
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module.exports.argument = escapeArgument;
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