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24f43903b4
PR-URL: https://github.com/nodejs/node/pull/14235 Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Refael Ackermann <refack@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: James M Snell <jasnell@gmail.com>
19 lines
462 B
JavaScript
19 lines
462 B
JavaScript
'use strict'
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module.exports = isOptional
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const isOptDep = require('./is-opt-dep.js')
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function isOptional (node, seen) {
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if (!seen) seen = new Set()
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// If a node is not required by anything, then we've reached
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// the top level package.
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if (seen.has(node) || node.requiredBy.length === 0) {
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return false
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}
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seen.add(node)
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return node.requiredBy.every(function (req) {
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return isOptDep(req, node.package.name) || isOptional(req, seen)
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})
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}
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