Don't compute integrity when network restricted

__tests__/commands/_helpers.js

@@ -91,6 +91,7 @@ export function makeConfigFromDirectory(cwd: string, reporter: Reporter, flags:
  prefix: flags.prefix,
  production: flags.production,
  updateChecksums: !!flags.updateChecksums,
+ offline: !!flags.offline,
  focus: !!flags.focus,
  enableDefaultRc: !flags.noDefaultRc,
  extraneousYarnrcFiles: flags.useYarnrc,

__tests__/commands/install/integration.js

@@ -738,6 +738,11 @@ test('install should create integrity field if not present', () =>
  // backwards-compatibility
  }));
 
+test('install should not create integrity field if not present and in offline mode', () =>
+ runInstall({offline: true}, 'install-update-auth-no-offline-integrity', async config => {
+ expect(await fs.exists(path.join(config.cwd, 'node_modules', 'abab'))).toEqual(true);
+ }));
+
 test('install should ignore existing hash if integrity is present even if it fails to authenticate it', () =>
  expect(runInstall({}, 'install-update-auth-bad-sha512-good-hash')).rejects.toMatchObject({
  message: expect.stringContaining("computed integrity doesn't match our records"),

__tests__/fixtures/install/install-update-auth-no-offline-integrity/.yarnrc

@@ -0,0 +1 @@
+yarn-offline-mirror "./offline-mirror"

__tests__/fixtures/install/install-update-auth-no-offline-integrity/package.json

@@ -0,0 +1,9 @@
+{
+ "name": "install-update-auth-no-offline-integrity",
+ "version": "1.0.0",
+ "main": "index.js",
+ "license": "MIT",
+ "dependencies": {
+ "abab": "^2.0.0"
+ }
+}

__tests__/fixtures/install/install-update-auth-no-offline-integrity/yarn.lock

@@ -0,0 +1,7 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+abab@^2.0.0:
+ version "2.0.0"
+ resolved "https://registry.yarnpkg.com/abab/-/abab-2.0.0.tgz#aba0ab4c5eee2d4c79d3487d85450fb2376ebb0f"

src/resolvers/registries/npm-resolver.js

@@ -207,8 +207,8 @@ export default class NpmResolver extends RegistryResolver {
  }
  }
  }
- if (shrunk && shrunk._remote && shrunk._remote.integrity) {
- // if the integrity field does not exist, it needs to be created
+ if (shrunk && shrunk._remote && (shrunk._remote.integrity || this.config.offline)) {
+ // if the integrity field does not exist and we're not network-restricted, it needs to be created
  return shrunk;
  }