Add proguard config

Author: patrickfav

pom.xml

@@ -142,7 +142,7 @@
                     </execution>
                 </executions>
                 <configuration>
-                    <skip>false</skip> <!-- set this to true if fail because of missing credentials -->
+                    <skip>true</skip> <!-- set this to true if fail because of missing credentials -->
                     <keystore>keystore.jks</keystore>
                     <alias>pfopensource</alias>
                     <storepass>${env.OPENSOURCE_PROJECTS_KS_PW}</storepass>
@@ -170,6 +170,40 @@
                     <quiet>false</quiet>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>com.github.wvengen</groupId>
+                <artifactId>proguard-maven-plugin</artifactId>
+                <version>2.0.11</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>proguard</goal>
+                        </goals>
+                        <configuration>
+                            <includeDependency>false</includeDependency>
+                            <attachArtifactClassifier>proguard</attachArtifactClassifier>
+                            <attach>true</attach>
+                            <proguardVersion>6.0.3</proguardVersion>
+                            <obfuscate>true</obfuscate>
+                            <options>
+                                <option>-include ${project.basedir}/proguard-rules.pro</option>
+                            </options>
+                            <libs>
+                                <lib>${java.home}/lib/rt.jar</lib>
+                            </libs>
+                        </configuration>
+                    </execution>
+                </executions>
+                <dependencies>
+                    <dependency>
+                        <groupId>net.sf.proguard</groupId>
+                        <artifactId>proguard-base</artifactId>
+                        <version>6.0.3</version>
+                        <scope>runtime</scope>
+                    </dependency>
+                </dependencies>
+            </plugin>
         </plugins>
     </build>
 
@@ -222,4 +256,4 @@
         <system>Travis</system>
         <url>https://travis-ci.org/patrickfav/bytes-java</url>
     </ciManagement>
-</project>
+</project>

proguard-rules.pro

@@ -0,0 +1,41 @@
+-optimizations !code/simplification/arithmetic,!code/simplification/cast,!field/*,!class/merging/*
+-dontusemixedcaseclassnames
+-ignorewarnings
+-verbose
+
+-keepattributes *Annotation*,EnclosingMethod, InnerClasses, Exceptions, Signature, SourceFile, LineNumberTable
+-renamesourcefileattribute SourceFile
+-optimizationpasses 5
+-overloadaggressively
+
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+################################################
+
+-dontnote android.**
+-dontwarn android.**
+
+-dontnote com.sun.**
+-dontwarn com.sun.**
+
+-dontnote sun.**
+-dontwarn sun.**
+
+-dontnote java.**
+-dontwarn java.**
+
+-dontnote javax.**
+-dontwarn javax.**
+
+
+# keep all public classes in main package
+-keep class at.favre.lib.bytes.** { public *; }
+
+-keep class sun.misc.Unsafe { *; }