'use strict'

var util = require('util')

module.exports = {

/**

* Use 'strong quoting' using single quotes so that we only need

* to deal with nested single quote characters.

* http://wiki.bash-hackers.org/syntax/quoting#strong_quoting

*/

quote: function (value) {

var safe = /^[a-z0-9-_/.@%^=:]+$/i

// Unless `value` is a simple shell-safe string, quote it.

if (!safe.test(value)) {

return util.format('\'%s\'', value.replace(/'/g, "\'\\'\'"))

}

return value

},

escape: function (value) {

return value.replace(/\r/g, '\\r').replace(/\n/g, '\\n')

}

}