Add "yarn global outdated"

CHANGELOG.md

@@ -4,6 +4,10 @@ Please add one entry in this file for each change in Yarn's behavior. Use the sa
 
 ## Master
 
+- Adds `yarn global outdated`
+
+  [#6488](https://github.com/yarnpkg/yarn/pull/6485) - [**Matthias Winkelmann**](https://github.com/MatthiasWinkelmann)
+
 - Prints workspace names with `yarn workspaces` (silence with `-s`)
 
   [#7722](https://github.com/yarnpkg/yarn/pull/7722) - [**Orta**](https://twitter.com/orta)

__tests__/commands/global.js

@@ -170,6 +170,17 @@ test.concurrent('list', async (): Promise<void> => {
   });
 });
 
+test.concurrent('outdated', async (): Promise<void> => {
+  const tmpGlobalFolder = await createTempGlobalFolder();
+  const tmpPrefixFolder = await createTempPrefixFolder();
+  const flags = {globalFolder: tmpGlobalFolder, prefix: tmpPrefixFolder};
+  const upgradeFlags = {globalFolder: tmpGlobalFolder, prefix: tmpPrefixFolder, latest: true};
+  await runGlobal(['add', 'react-native-cli@2.0.0'], flags, 'add-with-prefix-flag', () => {});
+  return runGlobal(['outdated'], upgradeFlags, 'add-with-prefix-flag', (config, reporter, install, getStdout) => {
+    expect(getStdout()).toContain('react-native-cli');
+  });
+});
+
 test.concurrent('upgrade', async (): Promise<void> => {
   const tmpGlobalFolder = await createTempGlobalFolder();
   const tmpPrefixFolder = await createTempPrefixFolder();

src/cli/commands/global.js

@@ -10,6 +10,7 @@ import buildSubCommands from './_build-sub-commands.js';
 import Lockfile from '../../lockfile';
 import {Install} from './install.js';
 import {Add} from './add.js';
+import {run as runOutdated} from './outdated.js';
 import {run as runRemove} from './remove.js';
 import {run as runUpgrade} from './upgrade.js';
 import {run as runUpgradeInteractive} from './upgrade-interactive.js';
@@ -243,6 +244,13 @@ const {run, setFlags: _setFlags} = buildSubCommands('global', {
     await list(config, reporter, flags, args);
   },
 
+  async outdated(config: Config, reporter: Reporter, flags: Object, args: Array<string>): Promise<void> {
+    await updateCwd(config);
+
+    // upgrade module
+    await runOutdated(config, reporter, flags, args);
+  },
+
   async remove(config: Config, reporter: Reporter, flags: Object, args: Array<string>): Promise<void> {
     await updateCwd(config);