fix: parse proto packages without namespace correctly

typescript/src/schema/naming.ts

@@ -35,20 +35,20 @@ export class Naming {
       throw new Error('Protos provided have different proto packages.');
     }
     const rootPackage = prefix.replace(/\.$/, '');
-
-    // Define the regular expression to match a version component
-    // (e.g. "v1", "v1beta4", etc.).
-    const pattern = /^((?:[a-z0-9_.]+?)\.)?([a-z0-9_]+)(?:\.(v[0-9]+(p[0-9]+)?((alpha|beta)[0-9]+)?[^.]*))?$/;
-    const match = rootPackage.match(pattern);
-    if (!match) {
+    const segments = rootPackage.split('.');
+    if (!segments || segments.length < 2) {
       throw new Error(`Cannot parse package name ${rootPackage}.`);
     }
-    const [, namespaces, name, version] = match;
-    if (!namespaces) {
+    const version = segments[segments.length - 1];
+    // version should follow the pattern of 'v1' or 'v1alpha1'
+    const versionPattern = /^((v[0-9]+(p[0-9]+)?((alpha|beta)[0-9]+)?[^.]*))?$/;
+    if (!version.match(versionPattern)) {
       throw new Error(
-        `Cannot parse package name ${rootPackage}: namespace is not defined.`
+        `Cannot parse package name ${rootPackage}: version does not match ${versionPattern}.`
       );
     }
+    const name = segments[segments.length - 2];
+    const namespaces = segments.slice(0, -2).join('.');
     this.name = name.capitalize();
     this.productName = this.name;
     this.namespace = namespaces.replace(/\.$/, '').split('.');

typescript/test/unit/api.ts

@@ -71,6 +71,21 @@ describe('schema/api.ts', () => {
     assert.deepStrictEqual(api.mainServiceName, 'AService');
   });
 
+  it('should return correct mainServiceName for API without namespace', () => {
+    const fd1 = new plugin.google.protobuf.FileDescriptorProto();
+    fd1.name = 'service/v1/test.proto';
+    fd1.package = 'service.v1';
+    fd1.service = [new plugin.google.protobuf.ServiceDescriptorProto()];
+    fd1.service[0].name = 'Service';
+    fd1.service[0].options = {
+      '.google.api.defaultHost': 'hostname.example.com:443',
+    };
+    const api = new API([fd1], 'service.v1', {
+      grpcServiceConfig: new plugin.grpc.service_config.ServiceConfig(),
+    });
+    assert.deepStrictEqual(api.mainServiceName, 'Service');
+  });
+
   it('should return main service name specificed as an option', () => {
     const fd1 = new plugin.google.protobuf.FileDescriptorProto();
     fd1.name = 'google/cloud/test/v1/test.proto';

typescript/test/unit/naming.ts

@@ -33,6 +33,30 @@ describe('schema/naming.ts', () => {
     assert.strictEqual(naming.protoPackage, 'google.namespace.service.v1beta1');
   });
 
+  it('parses name correctly 2', () => {
+    const descriptor1 = new plugin.google.protobuf.FileDescriptorProto();
+    descriptor1.package = 'service.v1beta1';
+    descriptor1.service = [new plugin.google.protobuf.ServiceDescriptorProto()];
+    const naming = new Naming([descriptor1]);
+    assert.strictEqual(naming.name, 'Service');
+    assert.strictEqual(naming.productName, 'Service');
+    assert.deepStrictEqual(naming.namespace, ['']);
+    assert.strictEqual(naming.version, 'v1beta1');
+    assert.strictEqual(naming.protoPackage, 'service.v1beta1');
+  });
+
+  it('parses name correctly 3', () => {
+    const descriptor1 = new plugin.google.protobuf.FileDescriptorProto();
+    descriptor1.package = 'company.service.v1beta1';
+    descriptor1.service = [new plugin.google.protobuf.ServiceDescriptorProto()];
+    const naming = new Naming([descriptor1]);
+    assert.strictEqual(naming.name, 'Service');
+    assert.strictEqual(naming.productName, 'Service');
+    assert.deepStrictEqual(naming.namespace, ['company']);
+    assert.strictEqual(naming.version, 'v1beta1');
+    assert.strictEqual(naming.protoPackage, 'company.service.v1beta1');
+  });
+
   it('ignores files with no services when determining package name', () => {
     const descriptor1 = new plugin.google.protobuf.FileDescriptorProto();
     const descriptor2 = new plugin.google.protobuf.FileDescriptorProto();