Use different folders with integrity or without (#7586)

* Uses a different folder for pkgs with integrity or without

* Fixes for when integrity is an object instance

* Stores whether integrity exists or not

* Updates a lockfile to reference the integrity

* Fixes resolver check

* Fixes cache pattern

Author: arcanis

__tests__/fixtures/install/install-production/yarn.lock

@@ -5,7 +5,9 @@
 is-array@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-array/-/is-array-1.0.1.tgz#e9850cc2cc860c3bc0977e84ccf0dd464584279a"
+  integrity sha1-6YUMwsyGDDvAl36EzPDdRkWEJ5o=
 
 left-pad@^1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/left-pad/-/left-pad-1.1.3.tgz#612f61c033f3a9e08e939f1caebeea41b6f3199a"
+  integrity sha1-YS9hwDPzqeCOk58crr7qQbbzGZo=

__tests__/package-resolver.js

@@ -14,7 +14,7 @@ jasmine.DEFAULT_TIMEOUT_INTERVAL = 90000;
 const path = require('path');
 
 // regexp which verifies that the cache path contains a path component ending with semver + hash
-const cachePathRe = /-\d+\.\d+\.\d+-[\dabcdef]{40}[\\\/]/;
+const cachePathRe = /-\d+\.\d+\.\d+-[\dabcdef]{40}(?:-integrity)?[\\\/]/;
 
 async function createEnv(configOptions): Object {
   const lockfile = new Lockfile();

src/config.js

@@ -17,6 +17,7 @@ import {registries, registryNames} from './registries/index.js';
 import {NoopReporter} from './reporters/index.js';
 import map from './util/map.js';
 
+const crypto = require('crypto');
 const detectIndent = require('detect-indent');
 const invariant = require('invariant');
 const path = require('path');
@@ -520,6 +521,10 @@ export default class Config {
       slug += `-${hash}`;
     }
 
+    if (pkg.remote.integrity) {
+      slug += `-integrity`;
+    }
+
     return slug;
   }