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website/node_modules/npm/lib/install/update-package-json.js

@@ -0,0 +1,56 @@
+'use strict'
+var path = require('path')
+var writeFileAtomic = require('write-file-atomic')
+var moduleName = require('../utils/module-name.js')
+var deepSortObject = require('../utils/deep-sort-object.js')
+var sortedObject = require('sorted-object')
+var isWindows = require('../utils/is-windows.js')
+
+var sortKeys = [
+  'dependencies', 'devDependencies', 'bundleDependencies',
+  'optionalDependencies', 'keywords', 'engines', 'scripts',
+  'files'
+]
+
+module.exports = function (mod, buildpath, next) {
+  var pkg = sortedObject(mod.package)
+  var name = moduleName(mod)
+  // Add our diagnostic keys to the package.json.
+  // Note that there are folks relying on these, for ex, the Visual Studio
+  // Node.js addon.
+  pkg._requiredBy =
+    mod.requiredBy
+      .map(function (req) {
+        if (
+          req.package.devDependencies &&
+          req.package.devDependencies[name] &&
+          !req.package.dependencies[name]
+        ) {
+          return '#DEV:' + req.location
+        } else {
+          return req.location
+        }
+      })
+      .concat(mod.userRequired ? ['#USER'] : [])
+      .sort()
+  pkg._location = mod.location
+  pkg._phantomChildren = {}
+  Object.keys(mod.phantomChildren).sort().forEach(function (name) {
+    pkg._phantomChildren[name] = mod.phantomChildren[name].package.version
+  })
+  pkg._inBundle = !!mod.fromBundle
+
+  // sort keys that are known safe to sort to produce more consistent output
+  sortKeys.forEach(function (key) {
+    if (pkg[key] != null) pkg[key] = deepSortObject(pkg[key])
+  })
+
+  var data = JSON.stringify(sortedObject(pkg), null, 2) + '\n'
+
+  writeFileAtomic(path.resolve(buildpath, 'package.json'), data, {
+    // We really don't need this guarantee, and fsyncing here is super slow. Except on
+    // Windows where there isn't a big performance difference and it prevents errors when
+    // rolling back optional packages (#17671)
+    fsync: isWindows
+  }, next)
+}