fix(lerna): Use packages path from lerna.json (#542)

lib/workers/repository/apis.js

@@ -36,7 +36,8 @@ async function checkForLerna(config) {
   }
   config.logger.debug({ lernaJson }, 'Found lerna config');
   try {
-    const lernaPackages = await config.api.getSubDirectories('packages');
+    const packagesPath = lernaJson.packages[0].slice(0, -2);
+    const lernaPackages = await config.api.getSubDirectories(packagesPath);
     if (lernaPackages.length === 0) {
       return {};
     }

test/workers/repository/apis.spec.js

@@ -59,7 +59,7 @@ describe('workers/repository/apis', () => {
     it('ignores zero length lerna', async () => {
       const config = {
         api: {
-          getFileJson: jest.fn(() => ({})),
+          getFileJson: jest.fn(() => ({ packages: ['packages/*'] })),
           getSubDirectories: jest.fn(() => []),
         },
         logger,
@@ -70,7 +70,7 @@ describe('workers/repository/apis', () => {
     it('returns lerna package names', async () => {
       const config = {
         api: {
-          getFileJson: jest.fn(() => ({})),
+          getFileJson: jest.fn(() => ({ packages: ['packages/*'] })),
           getSubDirectories: jest.fn(() => ['a', 'b']),
         },
         logger,