samples: add presubmit lint check (#156)

* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* chore(java_templates): add lint/static analysis presubmit checks for samples

* chore(java_templates): add lint/static analysis presubmit checks for samples

* chore: fix trailing whitespace

Source-Author: Jeff Ching <chingor@google.com>
Source-Date: Mon Aug 17 14:29:16 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: c3caf0704f25a0c365f1c315e804a30b87c62a75
Source-Link: googleapis/synthtool@c3caf07

* chore(java_templates): stop running pmd/spotbugs checks for samples

This was creating too much noise. We will revisit with other options and/or tune these checks.

Source-Author: Jeff Ching <chingor@google.com>
Source-Date: Wed Aug 19 12:26:49 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 9602086c6c5b05db77950c7f7495a2a3868f3537
Source-Link: googleapis/synthtool@9602086

* chore: fix line length

Co-authored-by: Jeff Ching <chingor@google.com>

.github/workflows/samples.yaml

@@ -0,0 +1,14 @@
+on:
+  pull_request:
+name: samples
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 8
+      - name: Run checkstyle
+        run: mvn -P lint --quiet --batch-mode checkstyle:check
+        working-directory: samples/snippets

README.md

@@ -20,7 +20,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>9.0.0</version>
+      <version>9.1.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -41,7 +41,7 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-document-ai</artifactId>
-  <version>0.2.0</version>
+  <version>0.2.1</version>
 </dependency>
 
 ```
@@ -50,11 +50,11 @@ If you are using Maven without BOM, add this to your dependencies:
 
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-document-ai:0.2.2'
+compile 'com.google.cloud:google-cloud-document-ai:0.2.1'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-document-ai" % "0.2.2"
+libraryDependencies += "com.google.cloud" % "google-cloud-document-ai" % "0.2.1"
 ```
 [//]: # ({x-version-update-end})
 

samples/snippets/src/main/java/documentai/v1beta2/ParseWithModelBeta.java

@@ -32,7 +32,8 @@ public static void parseWithModel() throws IOException {
     // TODO(developer): Replace these variables before running the sample.
     String projectId = "your-project-id";
     String location = "your-project-location"; // Format is "us" or "eu".
-    // AutoML model name formatted as: "projects/[PROJECT_ID]/locations/[LOCATION]/models/[MODEL_ID]"
+    // AutoML model name formatted as:
+    //   "projects/[PROJECT_ID]/locations/[LOCATION]/models/[MODEL_ID]"
     String autoMlModel = "your-full-resource-model-name";
     String gcsUri = "gs://your-gcs-bucket/path/to/input/file.json";
     parseWithModel(projectId, location, autoMlModel, gcsUri);

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-document-ai.git",
-        "sha": "6375fc35ccbf5ce24062ba53720633fb63721e86"
+        "sha": "efa38a37599636742d80f75d0165f427fa7f3b33"
       }
     },
     {
@@ -27,7 +27,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "f8823dec98277a9516f2fb6fae9f58b3a59a23e1"
+        "sha": "9602086c6c5b05db77950c7f7495a2a3868f3537"
       }
     }
   ],
@@ -60,6 +60,7 @@
     ".github/release-please.yml",
     ".github/trusted-contribution.yml",
     ".github/workflows/ci.yaml",
+    ".github/workflows/samples.yaml",
     ".kokoro/build.bat",
     ".kokoro/build.sh",
     ".kokoro/coerce_logs.sh",