construct custom format from a variable

[m67hoff]

This is probably only a question and so maybe wrong here?
I try to verify an input json (express post) and also verify a "known shared SECRET" in the same "is-my-json-valid" step. The "SECRET" is set in a global environment config object (read from file):

var config.SECRET = "hellomeraki"
var validatorOptions = {
  formats: { 
    SECRET: /^hellomeraki$/ 
  }, 
  verbose: true, 
  greedy: true
}
validatorOptions.formats.SECRET = /^hellomeraki$/ 
var validate = validator(config.INPUTDATASCHEMA, validatorOptions)
...
if (!validate(req.body)) { 
...
}

no matter how I try I was not able to get it working:

validatorOptions.formats.SECRET = /^hellomeraki$/  // works but is static (has to edit source)
validatorOptions.formats.SECRET = /^config.SECRET$/   // no - var not replaced
validatorOptions.formats.SECRET = '/^' + config.SECRET + '$/'   // no - replaced but now string so: validatorOptions.formats.SECRET = /^ + config.SECRET + $/   // no - var not replaced

So has anyone a hint ?
BTW: changing it in the INPUTDATASCHEMA to type:'string', enum:['hellomeraki'] is not really an option, than the "user" has to edit not only the config but also the schema file.

[m67hoff]

Sorry for asking,

validatorOptions.formats.SECRET = new RegExp('^' + config.SECRET + '$')

works well. So std. RegExp. (I close this issue)