.travis.yml

# openjdk-6-jdk is not available in more recent Ubuntu versions
dist: trusty
language: java
install:
  # Download dependencies with JDK 8 because Maven Central supports
  # TLS 1.2 only but OpenJDK 6 does not.
  - export ORIGINAL_JAVA_HOME=$JAVA_HOME
  - jdk_switcher use oraclejdk8
  - ./mvnw test -DskipTests
  # Delete all files created with JDK 8
  - ./mvnw clean
  # Build with JDK 6 because we build the artifacts that are published
  # to Maven Central with OpenJDK 6, too.
  - jdk_switcher use openjdk6
  # Run original install command but without GPG signing
  - ./mvnw install -DskipTests=true -Dgpg.skip=true
  # Restore desired JDK
  - export JAVA_HOME=$ORIGINAL_JAVA_HOME
addons:
  apt:
    packages:
      - openjdk-6-jdk
jdk:
  - openjdk10
  - oraclejdk9
  - oraclejdk8
  - openjdk7

# The jdk key does not work for openjdk6 in Travis CI any more, so
# we manually install openjdk-6-jdk and set JAVA_HOME appropriately
# (https://github.com/travis-ci/travis-ci/issues/9713)
matrix:
  include:
  - env: JAVA_HOME=/usr/lib/jvm/java-6-openjdk-amd64