docs: cloud rad java doc generation (#1336)

* test: adding javadocv3 docfx generatiion

* chore: removing options

* chore: update build file

* chore: update path

* chore: adding readme and docfx prefix

* chore: fix comment

* test: remove from maven publishing

.kokoro/release/publish_javadoc11.cfg

@@ -0,0 +1,30 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# cloud-rad production
+env_vars: {
+          key: "STAGING_BUCKET_V2"
+          value: "docs-staging-v2"
+}
+
+# Configure the docker image for kokoro-trampoline
+env_vars: {
+          key: "TRAMPOLINE_IMAGE"
+          value: "gcr.io/cloud-devrel-kokoro-resources/java11"
+}
+
+env_vars: {
+          key: "TRAMPOLINE_BUILD_FILE"
+          value: "github/gax-java/.kokoro/release/publish_javadoc11.sh"
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73713
+      keyname: "docuploader_service_account"
+    }
+  }
+}
+
+# Downloads docfx doclet resource. This will be in ${KOKORO_GFILE_DIR}/<doclet name>
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/docfx"

.kokoro/release/publish_javadoc11.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+# Copyright 2019 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+if [[ -z "${CREDENTIALS}" ]]; then
+  CREDENTIALS=${KOKORO_KEYSTORE_DIR}/73713_docuploader_service_account
+fi
+
+if [[ -z "${STAGING_BUCKET_V2}" ]]; then
+  echo "Need to set STAGING_BUCKET environment variable"
+  exit 1
+fi
+
+# work from the git root directory
+pushd $(dirname "$0")/../../
+
+# install docuploader package
+python3 -m pip install gcp-docuploader
+
+NAME=gax
+VERSION=$(grep ${NAME}: versions.txt | cut -d: -f3)
+
+# build the docs
+./gradlew javadocCombinedV3
+
+# copy README to tmp_docs dir and rename index.md
+cp README.md tmp_docs/index.md
+
+pushd tmp_docs
+
+# create metadata
+python3 -m docuploader create-metadata \
+  --name ${NAME} \
+  --version ${VERSION} \
+  --language java
+
+# upload docs
+python3 -m docuploader upload . \
+  --credentials ${CREDENTIALS} \
+  --staging-bucket ${STAGING_BUCKET_V2} \
+  --destination-prefix docfx
+
+popd

build.gradle

@@ -173,7 +173,7 @@ subprojects {
     exclude('**/*Test.java')
   }
 
-  // JavaDoc
+  // JavaDocV1 html
   // -------
 
   task javadocJar(type: Jar) {
@@ -193,6 +193,26 @@ subprojects {
     }
   }
 
+  // JavaDocV3 - docFX
+  // -------
+
+  task javadocJarV3(type: Jar) {
+    classifier = 'javadoc'
+    from javadoc
+  }
+
+  javadoc.options {
+    encoding = 'UTF-8'
+    links 'https://docs.oracle.com/javase/7/docs/api/'
+
+    if (JavaVersion.current().isJava8Compatible()) {
+      addStringOption('Xdoclint:all,-missing', '-quiet')
+    }
+    if (JavaVersion.current().isJava11Compatible()) {
+      addStringOption('-release', '7')
+    }
+  }
+
   // Test jar
   // --------
 
@@ -382,9 +402,8 @@ subprojects {
   }
 }
 
-// JavaDoc
+// JavaDocV1 html
 // -------
-
 task javadocCombined(type: Javadoc) {
   source subprojects.collect {project -> project.sourceSets.main.allJava }
   classpath = files(subprojects.collect {project -> project.sourceSets.main.compileClasspath})
@@ -401,6 +420,23 @@ clean {
   delete 'tmp_docs/'
 }
 
+// JavaDocV3 docFX
+// -------
+task javadocCombinedV3(type: Javadoc) {
+  source subprojects.collect {project -> project.sourceSets.main.allJava }
+  classpath = files(subprojects.collect {project -> project.sourceSets.main.compileClasspath})
+  destinationDir = new File(projectDir, 'tmp_docs')
+
+  options.addStringOption('encoding', 'UTF-8')
+  options.addStringOption("doclet", "com.microsoft.doclet.DocFxDoclet")
+  options.docletpath = [file(System.getenv('KOKORO_GFILE_DIR') + "/docfx-doclet-1.0-SNAPSHOT-jar-with-dependencies-172556.jar")]
+}
+
+clean {
+  delete 'tmp_gh-pages/'
+  delete 'tmp_docs/'
+}
+
 // Release
 // =======