fix(core): include root package.json when reading yarn & lerna config

When no --source options are provided and lerna.json or yarn workspaces
config are used to locate package.json files by default, the root
package.json file was previously not included.

src/commands/lib/get-wrappers.spec.ts

@@ -13,6 +13,7 @@ describe('getWrappers', () => {
 
   beforeEach(() => {
     mock({
+      'package.json': JSON.stringify({ name: 'root' }),
       'cli/a/package.json': JSON.stringify({ name: 'cli-a' }),
       'cli/b/package.json': JSON.stringify({ name: 'cli-b' }),
       'lerna.json': JSON.stringify({ packages: ['lerna/*'] }),
@@ -23,7 +24,10 @@ describe('getWrappers', () => {
     });
   });
 
-  const getShape = (name: string, filePath: string): SourceWrapper => ({ contents: { name }, filePath });
+  const getShape = (name: string, filePath: string): SourceWrapper => ({
+    contents: { name },
+    filePath: `${process.cwd()}/${filePath}`,
+  });
 
   it('prefers CLI', () => {
     const program = { source: ['cli/*/package.json'] };
@@ -36,6 +40,7 @@ describe('getWrappers', () => {
   it('falls back to lerna.json if present', () => {
     const program = { source: [] };
     expect(getWrappers(program)).toEqual([
+      getShape('root', 'package.json'),
       getShape('lerna-a', 'lerna/a/package.json'),
       getShape('lerna-b', 'lerna/b/package.json'),
     ]);
@@ -45,6 +50,7 @@ describe('getWrappers', () => {
     const program = { source: [] };
     removeSync('lerna.json');
     expect(getWrappers(program)).toEqual([
+      getShape('root', 'package.json'),
       getShape('packages-a', 'packages/a/package.json'),
       getShape('packages-b', 'packages/b/package.json'),
     ]);
@@ -66,6 +72,7 @@ describe('getWrappers', () => {
     it('should resolve correctly', () => {
       const program = { source: [] };
       expect(getWrappers(program)).toEqual([
+        { contents: { workspaces: ['packages/*'] }, filePath: `${process.cwd()}/package.json` },
         getShape('packages-a', 'packages/a/package.json'),
         getShape('packages-b', 'packages/b/package.json'),
       ]);

src/commands/lib/get-wrappers.ts

@@ -31,15 +31,17 @@ const getPatternsFromConfig = (fileName: string, propName: string): string[] | n
   const filePath = resolve(process.cwd(), fileName);
   const config = readJsonSync(filePath, { throws: false });
   const isNonEmptyArray = config && config[propName] && config[propName].length > 0;
-  return isNonEmptyArray ? config[propName].map((dirPath: string) => join(dirPath, 'package.json')) : null;
+  return isNonEmptyArray
+    ? [process.cwd()].concat(config[propName]).map((dirPath: string) => join(dirPath, 'package.json'))
+    : null;
 };
 
 const hasCliPatterns = (program: Options) => program.source && program.source.length > 0;
 const getCliPatterns = (program: Options) => program.source;
 const getYarnPatterns = () => getPatternsFromConfig('package.json', 'workspaces');
 const getLernaPatterns = () => getPatternsFromConfig('lerna.json', 'packages');
 const getDefaultPatterns = () => ALL_PATTERNS;
-const resolvePattern = (pattern: string) => sync(pattern);
+const resolvePattern = (pattern: string) => sync(pattern, { absolute: true });
 const reduceFlatArray = (all: string[], next: string[]) => all.concat(next);
 const createWrapper = (filePath: string) => ({ contents: readJsonSync(filePath), filePath });