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website/node_modules/npm/lib/install/action/refresh-package-json.js

@@ -0,0 +1,45 @@
+'use strict'
+
+const Bluebird = require('bluebird')
+
+const checkPlatform = Bluebird.promisify(require('npm-install-checks').checkPlatform)
+const getRequested = require('../get-requested.js')
+const npm = require('../../npm.js')
+const path = require('path')
+const readJson = Bluebird.promisify(require('read-package-json'))
+const updatePackageJson = Bluebird.promisify(require('../update-package-json'))
+
+module.exports = function (staging, pkg, log) {
+  log.silly('refresh-package-json', pkg.realpath)
+
+  return readJson(path.join(pkg.path, 'package.json'), false).then((metadata) => {
+    Object.keys(pkg.package).forEach(function (key) {
+      if (key !== 'version' && key !== 'dependencies' && !isEmpty(pkg.package[key])) {
+        metadata[key] = pkg.package[key]
+      }
+    })
+    if (metadata._resolved == null && pkg.fakeChild) {
+      metadata._resolved = pkg.fakeChild.resolved
+    }
+    // These two sneak in and it's awful
+    delete metadata.readme
+    delete metadata.readmeFilename
+
+    pkg.package = metadata
+    pkg.fakeChild = false
+  }).catch(() => 'ignore').then(() => {
+    return checkPlatform(pkg.package, npm.config.get('force'))
+  }).then(() => {
+    const requested = pkg.package._requested || getRequested(pkg)
+    if (requested.type !== 'directory') {
+      return updatePackageJson(pkg, pkg.path)
+    }
+  })
+}
+
+function isEmpty (value) {
+  if (value == null) return true
+  if (Array.isArray(value)) return !value.length
+  if (typeof value === 'object') return !Object.keys(value).length
+  return false
+}