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Current File : /proc/self/root/lib/node_modules/npm/lib/install/is-only-dev.js
'use strict'
module.exports = isOnlyDev
const moduleName = require('../utils/module-name.js')
const isDevDep = require('./is-dev-dep.js')
const isProdDep = require('./is-prod-dep.js')
// Returns true if the module `node` is only required direcctly as a dev
// dependency of the top level or transitively _from_ top level dev
// dependencies.
// Dual mode modules (that are both dev AND prod) should return false.
function isOnlyDev (node, seen) {
if (!seen) seen = new Set()
return node.requiredBy.length && node.requiredBy.every(andIsOnlyDev(moduleName(node), seen))
}
// There is a known limitation with this implementation: If a dependency is
// ONLY required by cycles that are detached from the top level then it will
// ultimately return true.
//
// This is ok though: We don't allow shrinkwraps with extraneous deps and
// these situation is caught by the extraneous checker before we get here.
function andIsOnlyDev (name, seen) {
return function (req) {
const isDev = isDevDep(req, name)
const isProd = isProdDep(req, name)
if (req.isTop) {
return isDev && !isProd
} else {
if (seen.has(req)) return true
seen.add(req)
const result = isOnlyDev(req, seen)
seen.delete(req)
return result
}
}
}