47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
'use strict'
|
|
|
|
/**
|
|
* Module Dependencies
|
|
*/
|
|
|
|
var Custom = require('custom-error-instance')
|
|
var uniq = require('lodash.uniqby')
|
|
|
|
/**
|
|
* Use a custom error type
|
|
*/
|
|
|
|
var MultiError = Custom('MultiError')
|
|
|
|
/**
|
|
* Export `Error`
|
|
*/
|
|
|
|
module.exports = error
|
|
|
|
/**
|
|
* Initialize an error
|
|
*/
|
|
|
|
function error (errors) {
|
|
if (!(this instanceof error)) return new error(errors)
|
|
errors = Array.isArray(errors) ? errors : [ errors ]
|
|
errors = uniq(errors, function (err) { return err.stack })
|
|
if (errors.length === 1) return errors[0]
|
|
var multierror = new MultiError({
|
|
message: errors.map(function (err) { return err.message }).join('; '),
|
|
errors: errors.reduce(function (errs, err) { return errs.concat(err.errors || err) }, []),
|
|
})
|
|
|
|
// lazily get/set the stack
|
|
multierror.__defineGetter__('stack', function() {
|
|
return errors.map(function (err) { return err.stack }).join('\n\n')
|
|
})
|
|
|
|
multierror.__defineSetter__('stack', function(value) {
|
|
return [value].concat(multierror.stack).join('\n\n')
|
|
})
|
|
|
|
return multierror
|
|
}
|