fix(terraform): skip tf files with only local modules

lib/manager/terraform/extract.js

@@ -95,5 +95,8 @@ function extractDependencies(content) {
     delete dep.versionLine;
     /* eslint-enable no-param-reassign */
   });
-  return deps.length ? { deps } : null;
+  if (deps.some(dep => dep.skipReason !== 'local')) {
+    return { deps };
+  }
+  return null;
 }

test/manager/terraform/extract.spec.js

@@ -4,6 +4,10 @@ const {
 } = require('../../../lib/manager/terraform/extract');
 
 const tf1 = fs.readFileSync('test/_fixtures/terraform/1.tf', 'utf8');
+const tf2 = `module "relative" {
+  source = "../../modules/fe"
+}
+`;
 
 describe('lib/manager/terraform/extract', () => {
   describe('extractDependencies()', () => {
@@ -20,5 +24,8 @@ describe('lib/manager/terraform/extract', () => {
       expect(res.deps).toHaveLength(13);
       expect(res.deps.filter(dep => dep.skipReason)).toHaveLength(4);
     });
+    it('returns null if only local deps', () => {
+      expect(extractDependencies(tf2, config)).toBe(null);
+    });
   });
 });