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