NodeJS: generate readme.

src/main/java/com/google/api/codegen/transformer/PackageMetadataNamer.java

@@ -38,7 +38,6 @@ public String getOutputFileName() {
     return getNotImplementedString("PackageMetadataNamer.getOutputFileName");
   }
 
-  // TODO: (landrito) this is copied from SurfaceNamer. Figure out a way to consolidate the methods.
   public String getReleaseAnnotation(ReleaseLevel releaseLevel) {
     switch (releaseLevel) {
       case UNSET_RELEASE_LEVEL:

src/main/java/com/google/api/codegen/transformer/nodejs/NodeJSPackageMetadataTransformer.java

@@ -16,53 +16,178 @@
 
 import com.google.api.codegen.InterfaceView;
 import com.google.api.codegen.TargetLanguage;
+import com.google.api.codegen.config.FlatteningConfig;
 import com.google.api.codegen.config.GapicProductConfig;
 import com.google.api.codegen.config.PackageMetadataConfig;
+import com.google.api.codegen.nodejs.NodeJSUtils;
+import com.google.api.codegen.transformer.DynamicLangApiMethodTransformer;
+import com.google.api.codegen.transformer.FileHeaderTransformer;
+import com.google.api.codegen.transformer.GapicInterfaceContext;
+import com.google.api.codegen.transformer.GapicMethodContext;
+import com.google.api.codegen.transformer.InitCodeTransformer;
 import com.google.api.codegen.transformer.ModelToViewTransformer;
+import com.google.api.codegen.transformer.ModelTypeTable;
 import com.google.api.codegen.transformer.PackageMetadataTransformer;
+import com.google.api.codegen.transformer.TestCaseTransformer;
+import com.google.api.codegen.util.js.JSTypeTable;
+import com.google.api.codegen.util.testing.StandardValueProducer;
+import com.google.api.codegen.util.testing.ValueProducer;
+import com.google.api.codegen.viewmodel.ApiMethodView;
+import com.google.api.codegen.viewmodel.ImportSectionView;
+import com.google.api.codegen.viewmodel.InitCodeView;
+import com.google.api.codegen.viewmodel.OptionalArrayMethodView;
 import com.google.api.codegen.viewmodel.ViewModel;
 import com.google.api.tools.framework.model.Interface;
+import com.google.api.tools.framework.model.Method;
 import com.google.api.tools.framework.model.Model;
+import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Iterables;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 /** Responsible for producing package metadata related views for NodeJS */
 public class NodeJSPackageMetadataTransformer implements ModelToViewTransformer {
-  private static final String PACKAGE_FILE = "nodejs/package.snip";
+  private static final String README_FILE = "nodejs/README.md.snip";
+  private static final String README_OUTPUT_FILE = "README.md";
+  private static final List<String> TOP_LEVEL_FILES = ImmutableList.of("nodejs/package.json.snip");
 
-  PackageMetadataConfig packageConfig;
-  PackageMetadataTransformer metadataTransformer = new PackageMetadataTransformer();
+  private static final String GITHUB_DOC_HOST =
+      "https://googlecloudplatform.github.io/google-cloud-node";
+  private static final String GITHUB_REPO_HOST =
+      "https://github.com/GoogleCloudPlatform/google-cloud-node";
+  private static final String AUTH_DOC_PATH = "/#/docs/google-cloud/master/guides/authentication";
+  private static final String LIB_DOC_PATH = "/#/docs/%s";
+  private static final String MAIN_README_PATH = "/blob/master/README.md";
+  private static final String VERSIONING_DOC_PATH = "#versioning";
+
+  private static String NODE_PREFIX = "nodejs/";
+
+  private final FileHeaderTransformer fileHeaderTransformer =
+      new FileHeaderTransformer(new NodeJSImportSectionTransformer());
+  private final PackageMetadataConfig packageConfig;
+  private final PackageMetadataTransformer metadataTransformer = new PackageMetadataTransformer();
+  private final ValueProducer valueProducer = new StandardValueProducer();
+  private final TestCaseTransformer testCaseTransformer = new TestCaseTransformer(valueProducer);
 
   public NodeJSPackageMetadataTransformer(PackageMetadataConfig packageConfig) {
     this.packageConfig = packageConfig;
   }
 
   @Override
   public List<String> getTemplateFileNames() {
-    return Arrays.asList(PACKAGE_FILE);
+    return ImmutableList.<String>builder().addAll(TOP_LEVEL_FILES).add(README_FILE).build();
   }
 
   @Override
   public List<ViewModel> transform(Model model, GapicProductConfig productConfig) {
-    Iterable<Interface> services = new InterfaceView().getElementIterable(model);
-    boolean hasMultipleServices = Iterables.size(services) > 1;
     List<ViewModel> models = new ArrayList<ViewModel>();
     NodeJSPackageMetadataNamer namer =
         new NodeJSPackageMetadataNamer(
             productConfig.getPackageName(), productConfig.getDomainLayerLocation());
-    models.add(generateMetadataView(model, namer, hasMultipleServices));
+    models.addAll(generateMetadataViews(model, namer));
+    models.add(generateReadmeView(model, productConfig, namer));
     return models;
   }
 
-  private ViewModel generateMetadataView(
-      Model model, NodeJSPackageMetadataNamer namer, boolean hasMultipleServices) {
+  private ViewModel generateReadmeView(
+      Model model, GapicProductConfig productConfig, NodeJSPackageMetadataNamer namer) {
+    List<ApiMethodView> exampleMethods = generateExampleMethods(model, productConfig);
+    Iterable<Interface> services = new InterfaceView().getElementIterable(model);
+    boolean hasMultipleServices = Iterables.size(services) > 1;
     return metadataTransformer
         .generateMetadataView(
-            packageConfig, model, PACKAGE_FILE, "package.json", TargetLanguage.NODEJS)
+            packageConfig, model, README_FILE, README_OUTPUT_FILE, TargetLanguage.NODEJS)
         .identifier(namer.getMetadataIdentifier())
+        .fileHeader(
+            fileHeaderTransformer.generateFileHeader(
+                productConfig,
+                ImportSectionView.newBuilder().build(),
+                new NodeJSSurfaceNamer(
+                    productConfig.getPackageName(), NodeJSUtils.isGcloud(productConfig))))
+        .developmentStatusTitle(
+            namer.getReleaseAnnotation(packageConfig.releaseLevel(TargetLanguage.NODEJS)))
+        .exampleMethods(exampleMethods)
         .hasMultipleServices(hasMultipleServices)
+        .targetLanguage("NodeJS")
+        .mainReadmeLink(GITHUB_REPO_HOST + MAIN_README_PATH)
+        .libraryDocumentationLink(
+            GITHUB_DOC_HOST + String.format(LIB_DOC_PATH, packageConfig.shortName()))
+        .authDocumentationLink(GITHUB_DOC_HOST + AUTH_DOC_PATH)
+        .versioningDocumentationLink(GITHUB_REPO_HOST + VERSIONING_DOC_PATH)
         .build();
   }
+
+  // Generates methods used as examples for the README.md file.
+  // Note: This is based on sample gen method calls. In the future, the example
+  // methods may be configured separately.
+  private List<ApiMethodView> generateExampleMethods(
+      Model model, GapicProductConfig productConfig) {
+    ImmutableList.Builder<ApiMethodView> exampleMethods = ImmutableList.builder();
+    for (Interface apiInterface : new InterfaceView().getElementIterable(model)) {
+      GapicInterfaceContext context = createContext(apiInterface, productConfig);
+      if (context.getInterfaceConfig().getSmokeTestConfig() != null) {
+        Method method = context.getInterfaceConfig().getSmokeTestConfig().getMethod();
+        FlatteningConfig flatteningGroup =
+            testCaseTransformer.getSmokeTestFlatteningGroup(
+                context.getMethodConfig(method), context.getInterfaceConfig().getSmokeTestConfig());
+        GapicMethodContext flattenedMethodContext =
+            context.asFlattenedMethodContext(method, flatteningGroup);
+        exampleMethods.add(createExampleApiMethodView(flattenedMethodContext));
+      }
+    }
+    return exampleMethods.build();
+  }
+
+  private OptionalArrayMethodView createExampleApiMethodView(GapicMethodContext context) {
+    OptionalArrayMethodView initialApiMethodView =
+        new DynamicLangApiMethodTransformer(new NodeJSApiMethodParamTransformer())
+            .generateMethod(context);
+
+    OptionalArrayMethodView.Builder apiMethodView = initialApiMethodView.toBuilder();
+
+    InitCodeTransformer initCodeTransformer = new InitCodeTransformer();
+    InitCodeView initCodeView =
+        initCodeTransformer.generateInitCode(
+            context, testCaseTransformer.createSmokeTestInitContext(context));
+    apiMethodView.initCode(initCodeView);
+
+    return apiMethodView.build();
+  }
+
+  private List<ViewModel> generateMetadataViews(Model model, NodeJSPackageMetadataNamer namer) {
+    ImmutableList.Builder<ViewModel> views = ImmutableList.builder();
+    for (String template : TOP_LEVEL_FILES) {
+      views.add(generateMetadataView(model, template, namer));
+    }
+    return views.build();
+  }
+
+  private ViewModel generateMetadataView(
+      Model model, String template, NodeJSPackageMetadataNamer namer) {
+    String noLeadingNodeDir =
+        template.startsWith(NODE_PREFIX) ? template.substring(NODE_PREFIX.length()) : template;
+    int extensionIndex = noLeadingNodeDir.lastIndexOf(".");
+    String outputPath = noLeadingNodeDir.substring(0, extensionIndex);
+
+    Iterable<Interface> services = new InterfaceView().getElementIterable(model);
+    boolean hasMultipleServices = Iterables.size(services) > 1;
+
+    return metadataTransformer
+        .generateMetadataView(packageConfig, model, template, outputPath, TargetLanguage.NODEJS)
+        .identifier(namer.getMetadataIdentifier())
+        .hasMultipleServices(hasMultipleServices)
+        .build();
+  }
+
+  private GapicInterfaceContext createContext(
+      Interface apiInterface, GapicProductConfig productConfig) {
+    return GapicInterfaceContext.create(
+        apiInterface,
+        productConfig,
+        new ModelTypeTable(
+            new JSTypeTable(productConfig.getPackageName()),
+            new NodeJSModelTypeNameConverter(productConfig.getPackageName())),
+        new NodeJSSurfaceNamer(productConfig.getPackageName(), NodeJSUtils.isGcloud(productConfig)),
+        new NodeJSFeatureConfig());
+  }
 }

src/main/java/com/google/api/codegen/transformer/nodejs/NodeJSSurfaceNamer.java

@@ -21,12 +21,14 @@
 import com.google.api.codegen.config.GrpcStreamingConfig.GrpcStreamingType;
 import com.google.api.codegen.config.SingleResourceNameConfig;
 import com.google.api.codegen.config.VisibilityConfig;
+import com.google.api.codegen.metacode.InitFieldConfig;
 import com.google.api.codegen.transformer.FeatureConfig;
 import com.google.api.codegen.transformer.GapicInterfaceContext;
 import com.google.api.codegen.transformer.ModelTypeFormatterImpl;
 import com.google.api.codegen.transformer.ModelTypeTable;
 import com.google.api.codegen.transformer.SurfaceNamer;
 import com.google.api.codegen.transformer.Synchronicity;
+import com.google.api.codegen.util.CommonRenderingUtil;
 import com.google.api.codegen.util.Name;
 import com.google.api.codegen.util.NamePath;
 import com.google.api.codegen.util.js.JSCommentReformatter;
@@ -40,9 +42,11 @@
 import com.google.api.tools.framework.model.Method;
 import com.google.api.tools.framework.model.ProtoFile;
 import com.google.api.tools.framework.model.TypeRef;
+import com.google.common.base.Joiner;
 import com.google.common.base.Splitter;
 import com.google.common.base.Strings;
 import com.google.common.collect.ImmutableList;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -465,4 +469,25 @@ public String getStreamTypeName(GrpcStreamingType type) {
             "SurfaceNamer.getStreamTypeName(GrpcStreamingType." + type.toString() + ")");
     }
   }
+
+  @Override
+  public String injectRandomStringGeneratorCode(String randomString) {
+    String delimiter = ",";
+    String[] split =
+        CommonRenderingUtil.stripQuotes(randomString)
+            .replace(
+                InitFieldConfig.RANDOM_TOKEN, delimiter + InitFieldConfig.RANDOM_TOKEN + delimiter)
+            .split(delimiter);
+    ArrayList<String> stringParts = new ArrayList<>();
+    for (String token : split) {
+      if (token.length() > 0) {
+        if (token.equals(InitFieldConfig.RANDOM_TOKEN)) {
+          stringParts.add("Date.now().toString()");
+        } else {
+          stringParts.add("\"" + token + "\"");
+        }
+      }
+    }
+    return Joiner.on(" + ").join(stringParts);
+  }
 }

src/main/resources/com/google/api/codegen/nodejs/README.md.snip

@@ -0,0 +1,23 @@
+@extends "nodejs/method_sample.snip"
+@extends "readme.snip"
+
+@snippet generate(metadata)
+  {@readme(metadata, exampleMethods(metadata.exampleMethods, metadata), installationLines(metadata))}
+@end
+
+@private exampleMethods(methods, metadata)
+  @join method : methods on BREAK
+    @#### {@method.apiClassName}
+    ```js
+     var {@method.apiModuleName} = require('{@metadata.identifier}').{@metadata.majorVersion}({
+       // optional auth parameters.
+     });
+
+     {@decorateSampleCode(method, sampleCode(method))}
+    ```
+  @end
+@end
+
+@private installationLines(metadata)
+  $ npm install {@metadata.identifier}
+@end

src/test/java/com/google/api/codegen/testdata/nodejs_README_library.baseline

@@ -0,0 +1,51 @@
+============== file: README.md ==============
+# NodeJS Client for Google Example Library API ([Alpha](https://github.com/GoogleCloudPlatform/google-cloud-node#versioning))
+
+Idiomatic NodeJS client for [Google Example Library API][Product Documentation]
+- [Client Library Documentation][]
+- [Product Documentation][]
+
+## Quick Start
+In order to use this library, you first need to go through the following steps:
+
+1. [Select or create a Cloud Platform project.](https://console.cloud.google.com/project)
+2. [Enable the library api.](https://console.cloud.google.com/apis/api/library)
+3. [Setup Authentication.](https://googlecloudplatform.github.io/google-cloud-node/#/docs/google-cloud/master/guides/authentication)
+
+### Installation
+```
+$ npm install @google-cloud/library
+```
+
+### Preview
+#### LibraryServiceClient
+```js
+ var libraryV1 = require('@google-cloud/library').v1({
+   // optional auth parameters.
+ });
+
+ var client = libraryV1.libraryServiceClient();
+ var formattedName = client.bookPath("testShelf-" + Date.now().toString(), projectId);
+ var rating = libraryV1.Book.Rating.GOOD;
+ var book = {
+     rating : rating
+ };
+ var request = {
+     name: formattedName,
+     book: book
+ };
+ client.updateBook(request).then(function(responses) {
+     var response = responses[0];
+     // doThingsWith(response)
+ }).catch(function(err) {
+     console.error(err);
+ });
+```
+
+### Next Steps
+- Read the [Client Library Documentation][] for Google Example Library API to see other available methods on the client.
+- Read the [Google Example Library API Product documentation][Product Documentation] to learn more about the product and see How-to Guides.
+- View this [repository's main README](https://github.com/GoogleCloudPlatform/google-cloud-node/blob/master/README.md) to see the full list of Cloud APIs that we cover.
+
+[Client Library Documentation]: https://googlecloudplatform.github.io/google-cloud-node/#/docs/library
+[Product Documentation]: https://cloud.google.com/library

src/test/java/com/google/api/codegen/testdata/nodejs_README_no_path_templates.baseline

@@ -0,0 +1,26 @@
+============== file: README.md ==============
+# NodeJS Client for Google Fake API ([Alpha](https://github.com/GoogleCloudPlatform/google-cloud-node#versioning))
+
+Idiomatic NodeJS client for [Google Fake API][Product Documentation]
+- [Client Library Documentation][]
+- [Product Documentation][]
+
+## Quick Start
+In order to use this library, you first need to go through the following steps:
+
+1. [Select or create a Cloud Platform project.](https://console.cloud.google.com/project)
+2. [Enable the library api.](https://console.cloud.google.com/apis/api/library)
+3. [Setup Authentication.](https://googlecloudplatform.github.io/google-cloud-node/#/docs/google-cloud/master/guides/authentication)
+
+### Installation
+```
+$ npm install example
+```
+
+### Next Steps
+- Read the [Client Library Documentation][] for Google Fake API to see other available methods on the client.
+- Read the [Google Fake API Product documentation][Product Documentation] to learn more about the product and see How-to Guides.
+- View this [repository's main README](https://github.com/GoogleCloudPlatform/google-cloud-node/blob/master/README.md) to see the full list of Cloud APIs that we cover.
+
+[Client Library Documentation]: https://googlecloudplatform.github.io/google-cloud-node/#/docs/library
+[Product Documentation]: https://cloud.google.com/library