Add yarn workspace support (#45)

src/__tests__/__snapshots__/cli.spec.ts.snap

@@ -46,6 +46,17 @@ package-a
 "
 `;
 
+exports[`CLI qnm <module>] should work in monorepo with yarn workspaces 1`] = `
+"package-foo
+└── 1.0.0
+
+package-a
+└─┬ package-foo
+  └── 2.0.0
+
+"
+`;
+
 exports[`CLI qnm list should --disable-colors 1`] = `
 "anotherDependency
 └── 1.0.0

src/__tests__/cli.spec.ts

@@ -60,6 +60,13 @@ describe('CLI', () => {
 
       expect(output).toMatchSnapshot();
     });
+
+    it.only('should work in monorepo with yarn workspaces', () => {
+      const cwd = resolveFixture('monorepo-with-workspaces');
+      const output = runCommand('package-foo', { cwd });
+
+      expect(output).toMatchSnapshot();
+    });
   });
 
   describe('qnm list', () => {

src/__tests__/fixtures/monorepo-with-workspaces/lerna.json

@@ -0,0 +1,4 @@
+{
+    "lerna": "3.15.0",
+    "useWorkspaces": true
+}

src/__tests__/fixtures/monorepo-with-workspaces/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "monorepo-with-workspaces",
+  "private": true,
+  "workspaces": [
+    "packages/*"
+  ]
+}

src/__tests__/fixtures/monorepo-with-workspaces/packages/package-a/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "package-a",
+  "version": "1.0.0"
+}

src/__tests__/fixtures/monorepo-with-workspaces/packages/package-b/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "package-b",
+  "version": "1.0.0"
+}

src/workspace/workspace.ts

@@ -8,6 +8,11 @@ import { isTruthy } from '../utils';
 import ModulesMap from './modules-map';
 import NodeModule from './node-module';
 
+type Workspaces =
+  | Array<string>
+  | { packages: Array<string> | undefined }
+  | undefined;
+
 type YarnLock = Record<
   string,
   { version: string; dependencies: Record<string, string> }
@@ -191,17 +196,33 @@ export default class Workspace {
     const lernaJsonPath = path.join(this.root, 'lerna.json');
     const lernaJson = JSON.parse(fs.readFileSync(lernaJsonPath, 'utf8'));
 
-    // TODO - add yarn workspaces support
-    const packages = globby.sync(lernaJson.packages, {
-      absolute: true,
-      onlyDirectories: true,
-    });
-
-    packages.forEach(location => {
-      try {
-        this.packages.push(Workspace.loadSync(location, false));
-      } catch (error) {}
-    });
+    let packages = lernaJson.packages;
+
+    if (lernaJson.useWorkspaces === true) {
+      const workspaces = this.packageJson.workspaces as Workspaces;
+
+      if (!Array.isArray(workspaces)) {
+        packages = workspaces?.packages;
+      } else {
+        packages = workspaces;
+      }
+    }
+
+    if (!packages) {
+      console.warn('No packages found for monorepo');
+      console.warn(`packages data wasn't loaded`);
+    }
+
+    globby
+      .sync(packages, {
+        absolute: true,
+        onlyDirectories: true,
+      })
+      .forEach(location => {
+        try {
+          this.packages.push(Workspace.loadSync(location, false));
+        } catch (error) {}
+      });
   }
 
   static loadSync(cwd = process.cwd(), traverse = true): Workspace {