Switch from Gradle to Maven

Author: mrotteveel

.gitignore

@@ -3,7 +3,9 @@ out/
 .idea_modules/
 .gradle/
 build/
+target/
 *.iws
+*.iml
 
 *.class
 *.log

.travis.yml

@@ -2,19 +2,3 @@ language: java
 
 services:
   - docker
-
-before_cache:
-  - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
-  - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
-cache:
-  directories:
-    - $HOME/.gradle/caches/
-    - $HOME/.gradle/wrapper/
-
-deploy:
-  provider: pages
-  skip-cleanup: true
-  github-token: $GITHUB_TOKEN
-  local-dir: build/docs/
-  on:
-    tags: true

build.gradle

@@ -1,32 +1,20 @@
 Deploying
 =========
 
+Make sure that JAVA_HOME points to Java 8 (the javadoc task fails with Java 11).
+
 To deploy to Maven use
 
 ```
-gradlew clean uploadArchives -PcredentialsPassphrase=<credentials password>
+mvn clean deploy -P release
 ```
 
-Where `<credentials password>` is the password used to add the credentials (see 
-also below).
-
-To be able to deploy, you need the following:
-
-a `<homedir>/.gradle/gradle.properties` with the following properties:
+For snapshots we can forego signing and generating javadoc + sources using:
 
 ```
-signing.keyId=<gpg key id>
-signing.secretKeyRingFile=<path to your secring.gpg> 
-
-ossrhUsername=<sonatype OSSRH username>
+mvn clean deploy
 ```
 
-In addition, you need to set the following credentials
-
-```
-./gradlew addCredentials --key signing.password --value <your secret key password> -PcredentialsPassphrase=<credentials password> 
-./gradlew addCredentials --key ossrhPassword --value <your sonatyp OSSRH password> -PcredentialsPassphrase=<credentials password> 
-```
+This requires the proper Sonatype credentials to be set in userhome/.m2/settings.xml.
 
-See https://github.com/etiennestuder/gradle-credentials-plugin for details on
-credentials.
+See https://central.sonatype.org/pages/apache-maven.html for details.