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