Initial version of the donation button to Shawn

We never had a “Donate” button on Gerrit Code Review, and we never
needed one because the project has always been OpenSource and Free.

Shawn Pearce, the project founder of Gerrit Code Review, died in January
by an aggressive lungs cancer, leaving his family behind.

By building this plugin, installing on Gerrit Code Review, give access
to Shawn Pearce Memorial Fund and allow more people to contribute and
show the solidarity of the OpenSource Community.

Change-Id: I05571cc3180b8eb14f07425e6d159c29a5ffe24e
diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+target
+.project
+.classpath
+.settings
+.idea
+*.iml
+.DS_Store
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
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diff --git a/README.md b/README.md
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+++ b/README.md
@@ -0,0 +1,44 @@
+# Make a donation button to Shawn Pearce Memorial Fund
+
+We never had a “Donate” button on Gerrit Code Review, we never needed one
+because the project has always been OpenSource and Free and always it will be.
+
+We have all benefited from the dedication and passion of the team of 600+
+contributors that every day spend their time innovating and improving the code.
+Thanks to all these people, we do have a world-class Code Review tool that hundreds
+of thousands of developers are using every day.
+
+## Time to say “Thank you Shawn”
+
+Shawn Pearce, the project founder of Gerrit Code Review, died in January 2018 by
+an aggressive lungs cancer, leaving a loving wife and his children behind.
+In many ways, Shawn’s daily work has been put continuously in the software that
+keeps GerritHub.io and many other Gerrit Code Review sites alive every day.
+
+It is about time to pay a tribute to Shawn dedication and make his dream to
+become true: giving the support and help to his family in this difficult moment.
+
+__CALL TO ACTION__: By installing this plugin into a Gerrit Code Review instance
+and allowing all the users to discover the Shawn Pearce Memorial Fund, you can
+thank the founder of this amazing project and show the solidarity of the OpenSource
+software and the people that are running and using it every day.
+
+## How to build
+
+Clone the donation-button plugin locally and build the package using Maven 3.x.
+
+```
+   $ git clone https://gerrit.googlesource.com/plugins/donation-button
+   $ cd donation-button && mvn package
+```
+
+## How to install
+
+Install the donation-button jar file generated under the /target directory into
+a Gerrit v2.13 or later /plugins directory.
+
+The donation link will appear on the top-menu bar of Gerrit Code Review and will
+contain the single menu item that points to Shawn Pearce Memorial Fund.
+
+
+
diff --git a/pom.xml b/pom.xml
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--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright (C) 2018 GerritForge Ltd
+
+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.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.googlesource.gerrit.plugins.donation</groupId>
+  <artifactId>donation-button</artifactId>
+  <version>2.13</version>
+  <name>Gerrit Code Review Donation Button</name>
+  <url>http://www.gerritforge.com</url>
+  <packaging>jar</packaging>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.1</version>
+        <configuration>
+          <source>1.8</source>
+          <target>1.8</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-shade-plugin</artifactId>
+        <version>3.1.0</version>
+        <configuration>
+          <transformers>
+            <transformer
+              implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+              <manifestEntries>
+                <Gerrit-Module>com.googlesource.gerrit.plugins.donation.GuiceModule</Gerrit-Module>
+                <Implementation-Vendor>GerritForge</Implementation-Vendor>
+                <Implementation-URL>http://www.gerritforge.com</Implementation-URL>
+
+                <Implementation-Title>${project.artifactId}</Implementation-Title>
+                <Implementation-Version>${project.version}</Implementation-Version>
+
+                <Gerrit-ApiType>plugin</Gerrit-ApiType>
+                <Gerrit-ApiVersion>${project.version}</Gerrit-ApiVersion>
+                <Gerrit-PluginName>donation-button</Gerrit-PluginName>
+              </manifestEntries>
+            </transformer>
+          </transformers>
+
+        </configuration>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>findbugs-maven-plugin</artifactId>
+        <version>3.0.0</version>
+      </plugin>
+    </plugins>
+  </reporting>
+  <repositories>
+    <repository>
+      <releases>
+        <enabled>true</enabled>
+      </releases>
+      <snapshots>
+        <enabled>false</enabled>
+      </snapshots>
+      <id>repo.jenkins-ci.org</id>
+      <url>http://repo.jenkins-ci.org/public/</url>
+    </repository>
+    <repository>
+      <snapshots>
+        <enabled>true</enabled>
+      </snapshots>
+      <id>sonatype</id>
+      <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
+    </repository>
+    <repository>
+      <releases>
+        <enabled>true</enabled>
+      </releases>
+      <snapshots>
+        <enabled>false</enabled>
+      </snapshots>
+      <id>gerrit-api-repository</id>
+      <url>https://gerrit-api.commondatastorage.googleapis.com/release/</url>
+    </repository>
+  </repositories>
+  <dependencies>
+      <dependency>
+          <groupId>com.google.gerrit</groupId>
+          <artifactId>gerrit-plugin-api</artifactId>
+          <version>${project.version}</version>
+          <scope>provided</scope>
+      </dependency>
+  </dependencies>
+</project>
diff --git a/src/main/java/com/googlesource/gerrit/plugins/donation/DonationTopMenu.java b/src/main/java/com/googlesource/gerrit/plugins/donation/DonationTopMenu.java
new file mode 100644
index 0000000..f0fe679
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/donation/DonationTopMenu.java
@@ -0,0 +1,43 @@
+// Copyright (C) 2018 GerritForge Ltd
+//
+// 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.
+
+package com.googlesource.gerrit.plugins.donation;
+
+import com.google.gerrit.extensions.client.MenuItem;
+import com.google.gerrit.extensions.webui.TopMenu;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class DonationTopMenu implements TopMenu {
+
+    private final List<TopMenu.MenuEntry> menuEntries;
+
+    public DonationTopMenu() {
+        this.menuEntries =
+                Arrays.asList(
+                        new TopMenu.MenuEntry(
+                                "MAKE A DONATION",
+                                Arrays.asList(
+                                        new MenuItem("Donate to Shawn Pearce Memorial Fund",
+                                                "https://www.gofundme.com/shawn-pearce-memorial-fund",
+                                                "_blank",
+                                                "donate"))));
+    }
+
+    @Override
+    public List<MenuEntry> getEntries() {
+        return menuEntries;
+    }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/donation/GuiceModule.java b/src/main/java/com/googlesource/gerrit/plugins/donation/GuiceModule.java
new file mode 100644
index 0000000..955cea9
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/donation/GuiceModule.java
@@ -0,0 +1,27 @@
+// Copyright (C) 2018 GerritForge Ltd
+//
+// 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.
+
+package com.googlesource.gerrit.plugins.donation;
+
+import com.google.gerrit.extensions.registration.DynamicSet;
+import com.google.gerrit.extensions.webui.TopMenu;
+import com.google.inject.AbstractModule;
+
+public class GuiceModule extends AbstractModule {
+
+    @Override
+    protected void configure() {
+        DynamicSet.bind(binder(), TopMenu.class).to(DonationTopMenu.class);
+    }
+}