Monorepo utils: add support for Yarn Berry

src/monorepo-utils/package.json

@@ -22,6 +22,7 @@
     "@babel/register": "^7.17.0",
     "@babel/runtime": "^7.17.2",
     "glob": "^7.2.0",
-    "is-ci": "^3.0.1"
+    "is-ci": "^3.0.1",
+    "semver": "^7.3.5"
   }
 }

src/monorepo-utils/src/getWorkspaceDependencies.js

@@ -1,4 +1,7 @@
-// @flow strict
+// @flow
+
+import os from 'os';
+import semver from 'semver';
 
 import sanitizeWorkspaces from './sanitizeWorkspaces';
 import ShellCommand from './ShellCommand';
@@ -8,19 +11,42 @@ import type { WorkspaceDependencies } from './Workspaces.flow';
  * This function returns the workspace dependencies
  */
 export default function getWorkspaceDependencies(): WorkspaceDependencies {
-  const stdout = new ShellCommand(null, 'yarn', '--json', 'workspaces', 'info')
-    .runSynchronously()
-    .getStdout();
+  const versionStdout = new ShellCommand(null, 'yarn', '--version').runSynchronously().getStdout();
+
+  // branch for Yarn Berry (v2+):
+  if (semver.gte(versionStdout, '2.0.0')) {
+    const sanitizeStdout = (stdout) => {
+      const workspaces = {};
+      const rows = stdout.split(os.EOL);
+      for (const row of rows) {
+        const parsedRow = JSON.parse(row);
+        if (parsedRow.name) {
+          workspaces[parsedRow.name] = {
+            location: parsedRow.location,
+            workspaceDependencies: parsedRow.workspaceDependencies,
+            mismatchedWorkspaceDependencies: parsedRow.mismatchedWorkspaceDependencies,
+          };
+        }
+      }
+      return workspaces;
+    };
+
+    const stdout = new ShellCommand(null, 'yarn', 'workspaces', 'list', '--verbose', '--json')
+      .runSynchronously()
+      .getStdout();
 
-  const sanitizeStdout = () => {
+    return sanitizeWorkspaces(sanitizeStdout(stdout.trim()));
+  }
+
+  // Yarn Classic (v1.*):
+  const sanitizeStdout = (stdout) => {
     const data = JSON.parse(stdout);
-    if (data.data === undefined) {
-      // yarn updated how they return data from yarn workspaces info --json, this is to support 1.22.0
-      return data;
-    }
-    // This is how the data has to be parsed prior to 1.22.0
     return JSON.parse(data.data);
   };
 
-  return sanitizeWorkspaces(sanitizeStdout());
+  const stdout = new ShellCommand(null, 'yarn', '--json', 'workspaces', 'info')
+    .runSynchronously()
+    .getStdout();
+
+  return sanitizeWorkspaces(sanitizeStdout(stdout.trim()));
 }