fix: symlink on win32 platform without admin rights

lib/arborist/reify.js

@@ -427,7 +427,11 @@ module.exports = cls => class Reifier extends cls {
     const dir = dirname(node.path)
     const target = node.realpath
     const rel = relative(dir, target)
-    return symlink(rel, node.path, 'dir')
+    return symlink(rel, node.path, this.linktype())
+  }
+
+  linktype (platform = process.platform) {
+    return platform === 'win32' ? 'junction' : 'dir'
   }
 
   [_warnDeprecated] (node) {

test/arborist/reify.js

@@ -1157,6 +1157,18 @@ t.test('add multiple pkgs in a specific order', async t => {
   )
 })
 
+t.test('link type for win32', async t => {
+  t.strictEqual(newArb({}).linktype('win32'), 'junction')
+})
+
+t.test('link type for darwin', async t => {
+  t.strictEqual(newArb({}).linktype('darwin'), 'dir')
+})
+
+t.test('link type for linux', async t => {
+  t.strictEqual(newArb({}).linktype('linux'), 'dir')
+})
+
 t.test('save complete lockfile on update-all', async t => {
   const path = t.testdir({
     'package.json': JSON.stringify({