'use strict'
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// eslint-disable-next-line max-len
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// this code adapted from: https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/
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const cmd = (input, doubleEscape) => {
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if (!input.length) {
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return '""'
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}
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let result
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if (!/[ \t\n\v"]/.test(input)) {
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result = input
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} else {
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result = '"'
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for (let i = 0; i <= input.length; ++i) {
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let slashCount = 0
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while (input[i] === '\\') {
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++i
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++slashCount
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}
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if (i === input.length) {
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result += '\\'.repeat(slashCount * 2)
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break
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}
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if (input[i] === '"') {
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result += '\\'.repeat(slashCount * 2 + 1)
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result += input[i]
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} else {
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result += '\\'.repeat(slashCount)
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result += input[i]
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}
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}
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result += '"'
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}
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// and finally, prefix shell meta chars with a ^
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result = result.replace(/[ !%^&()<>|"]/g, '^$&')
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if (doubleEscape) {
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result = result.replace(/[ !%^&()<>|"]/g, '^$&')
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}
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return result
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}
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const sh = (input) => {
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if (!input.length) {
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return `''`
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}
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if (!/[\t\n\r "#$&'()*;<>?\\`|~]/.test(input)) {
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return input
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}
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// replace single quotes with '\'' and wrap the whole result in a fresh set of quotes
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const result = `'${input.replace(/'/g, `'\\''`)}'`
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// if the input string already had single quotes around it, clean those up
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.replace(/^(?:'')+(?!$)/, '')
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.replace(/\\'''/g, `\\'`)
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return result
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}
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module.exports = {
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cmd,
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sh,
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}
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