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escape.js 1.14 KiB
'use strict';
// See http://www.robvanderwoude.com/escapechars.php
const metaCharsRegExp = /([()\][%!^"`<>&|;, *?])/g;
function escapeCommand(arg) {
    // Escape meta chars
    arg = arg.replace(metaCharsRegExp, '^$1');
    return arg;
function escapeArgument(arg, doubleEscapeMetaChars) {
    // Convert to string
    arg = `${arg}`;
    // Algorithm below is based on https://qntm.org/cmd
    // Sequence of backslashes followed by a double quote:
    // double up all the backslashes and escape the double quote
    arg = arg.replace(/(\\*)"/g, '$1$1\\"');
    // Sequence of backslashes followed by the end of the string
    // (which will become a double quote later):
    // double up all the backslashes
    arg = arg.replace(/(\\*)$/, '$1$1');
    // All other backslashes occur literally
    // Quote the whole thing:
    arg = `"${arg}"`;
    // Escape meta chars
    arg = arg.replace(metaCharsRegExp, '^$1');
    // Double escape meta chars if necessary
    if (doubleEscapeMetaChars) {
        arg = arg.replace(metaCharsRegExp, '^$1');
    return arg;
module.exports.command = escapeCommand;
module.exports.argument = escapeArgument;