first commit

node_modules/errlop/edition-browsers/index.js

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+'use strict'
+/** Only accept codes that are numbers, otherwise discard them */
+function parseCode(code) {
+	const number = Number(code)
+	if (isNaN(number)) return null
+	return number
+}
+/** Fetch the code from the value */
+function fetchCode(value) {
+	return (
+		value &&
+		(parseCode(value.exitCode) ||
+			parseCode(value.errno) ||
+			parseCode(value.code))
+	)
+}
+/** Prevent [a weird error on node version 4](https://github.com/bevry/errlop/issues/1) and below. */
+function isValid(value) {
+	/* eslint no-use-before-define:0 */
+	return value instanceof Error || Errlop.isErrlop(value)
+}
+export default class Errlop extends Error {
+	/**
+	 * Create an instance of an error, using a message, as well as an optional parent.
+	 * If the parent is provided, then the `fullStack` property will include its stack too
+	 */
+	constructor(input, parent) {
+		if (!input) throw new Error('Attempted to create an Errlop without a input')
+		// Instantiate with the above
+		super(input.message || input)
+		// Apply
+		this.klass = Errlop
+		this.parent = parent || input.parent
+		this.ancestors = []
+		let ancestor = this.parent
+		while (ancestor) {
+			this.ancestors.push(ancestor)
+			ancestor = ancestor.parent
+		}
+		// this code must support node 0.8, as well as prevent a weird bug in node v4
+		// https://travis-ci.org/bevry/editions/jobs/408828147
+		let exitCode = fetchCode(input)
+		if (exitCode == null) exitCode = fetchCode(this)
+		for (
+			let index = 0;
+			index < this.ancestors.length && exitCode == null;
+			++index
+		) {
+			const error = this.ancestors[index]
+			if (isValid(error)) exitCode = fetchCode(error)
+		}
+		// Apply
+		if (exitCode != null) {
+			this.exitCode = exitCode
+		}
+		this.orphanStack = (input.stack || this.stack).toString()
+		this.stack = this.ancestors.reduce(
+			(accumulator, error) =>
+				`${accumulator}\n↳ ${error.orphanStack || error.stack || error}`,
+			this.orphanStack
+		)
+	}
+	/**
+	 * Syntatic sugar for Errlop class creation.
+	 * Enables `Errlop.create(...args)` to achieve `new Errlop(...args)`
+	 */
+	static create(input, parent) {
+		return new this(input, parent)
+	}
+	/** Check whether or not the value is an Errlop instance */
+	static isErrlop(value) {
+		return value && (value instanceof this || value.klass === this)
+	}
+	/** Ensure that the value is an Errlop instance */
+	static ensure(value) {
+		return this.isErrlop(value) ? value : this.create(value)
+	}
+}