Build the site when something is pushed to main, or on PRs (#9)

There is room for improvement here, this is meant to be a first draft
before we start merging other cleanup, to validate those merges.

Fixes #7

.github/workflows/build.yml

@@ -0,0 +1,28 @@
+name: Build gwt-site-webapp
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Java
+        uses: actions/setup-java@v3
+        with:
+          java-version: '11'
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: Compile the webapp to JS
+        run: mvn --batch-mode --no-transfer-progress -e verify
+
+      - name: Rename generated directory
+        # Fixes issue where artifact zip contains top level directory due to wildcard expansion
+        run: mv target/gwt-site-webapp-*/ target/gwt-site-webapp
+      - name: Upload the generated JS
+        uses: actions/upload-artifact@v3
+        with:
+          name: 'gwt-site-webapp'
+          path: target/gwt-site-webapp/

README.md

@@ -1,28 +1,35 @@
 # gwt-site-webapp
- This project includes the server an client code of the GWT site
- It does not include the site content which is in the gwt-site project
- nor the utilities for uploading the documentation to GAE Servers which
- are in the gwt-site-uploader project.
+This project includes the client code of the GWT site. It does not include the
+site content which is in the gwt-site project nor the utilities to create and
+deploy with samples and plugin releases.
 
 ## Requirements
- [Apache Maven](http://maven.apache.org) 3.0 or greater, and JDK 7+ in order to run.
+[Apache Maven](http://maven.apache.org) 3.8 or greater, and JDK 11+ in order to run.
 
-- Before building the project you may need **gwt-site** packaged file.
-  Go to the `gwt-site` folder and run:
+To build the project, invoke the following command:
+
+    $ mvn verify
+
+This only tests and builds the JS to enhance the site content. To build the contents
+first, you need to build the gwt-site project.
+
+1. Check out the [gwt-site](https://github.com/gwtproject/gwt-site) project.
+2. Build the gwt-site project:
 
         $ cd [...]/gwt-site
         $ mvn install
 
-- To **build** and check the app, run
+3. Build the gwt-site-webapp project, with the -Pfull-site profile:
 
         $ cd [...]/gwt-site-webapp
-        $ mvn verify -P full-site
+        $ mvn verify -Pfull-site
 
-  Now you can point your browser to the `target/www` folder, or you can serve
-  its content with any web-server (i.e [serve](https://www.npmjs.com/package/serve)).
-  Notice that the second way is needed if you want to test site navigation via Ajax.
+Now you can point your browser to the `target/www` folder, or you can serve
+its content with any web-server (i.e [serve](https://www.npmjs.com/package/serve) or
+[http.server](https://docs.python.org/3/library/http.server.html)).
+Notice that an http server is needed if you want to test site navigation via Ajax.
 
-- Building will run the **tests**, but to explicitly run them you can use the test target
+Building will run the **tests**, but to explicitly run them you can use the test target
 
         $ mvn test
 

pom.xml

@@ -12,7 +12,7 @@
         <maven.build.timestamp.format>yyyy-MM-dd</maven.build.timestamp.format>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
-        <gwt.version>2.11.0</gwt.version>
+        <gwt.version>2.12.1</gwt.version>
 
         <junit.version>4.13.2</junit.version>
 
@@ -81,6 +81,11 @@
                     <compilerArgs>
                         <arg>-saveSource</arg>
                     </compilerArgs>
+                    <!--
+                    Draft and pretty mode are turned on so that beginners can try out debugging
+                    in their browser with no setup.
+                    Please don't disable this; code size is less important.
+                    -->
                     <draftCompile>true</draftCompile>
                     <style>PRETTY</style>
                     <failOnError>true</failOnError>
@@ -103,7 +108,7 @@
                             <goal>copy-resources</goal>
                         </goals>
                         <configuration>
-                            <outputDirectory>${project.build.directory}/${project.artifactId}-${project.version}/</outputDirectory>
+                            <outputDirectory>${project.build.directory}/${project.build.finalName}/</outputDirectory>
                             <resources>
                                 <!-- copy GWT source code to website for debugging -->
                                 <resource>
@@ -175,7 +180,7 @@
                                     <outputDirectory>${project.build.directory}/www/</outputDirectory>
                                     <resources>
                                         <resource>
-                                            <directory>${project.build.directory}/${project.artifactId}-${project.version}/</directory>
+                                            <directory>${project.build.directory}/${project.build.finalName}/</directory>
                                         </resource>
                                     </resources>
                                 </configuration>

src/main/module.gwt.xml

@@ -2,11 +2,10 @@
 <!-- Could not determine the version of your GWT SDK; using the module DTD from GWT 1.6.4. You may want to change this. -->
 <!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit//EN" "http://google-web-toolkit.googlecode.com/svn/trunk/distro-source/core/src/gwt-module.dtd">
 <module rename-to="gwtproject">
-	<inherits name="com.google.gwt.user.User" />
+    <inherits name="com.google.gwt.user.User" />
     <inherits name="elemental2.dom.Dom"/>
-	<source path="client" />
-	<entry-point
-		class="com.google.gwt.site.webapp.client.GWTProjectEntryPoint" />
+    <source path="client" />
+    <entry-point class="com.google.gwt.site.webapp.client.GWTProjectEntryPoint" />
     <add-linker name="xsiframe"/>
     <set-property name="compiler.useSourceMaps" value="true"/>
     <!-- change to localhost for development -->