+ && curl -fsSLO --compressed ${BASE_URL}/apache-maven-${MAVEN_VERSION}-bin.tar.gz \
+ && curl -fsSLO --compressed ${BASE_URL}/apache-maven-${MAVEN_VERSION}-bin.tar.gz.asc \
+ && for key in \
+ 6A814B1F869C2BBEAB7CB7271A2A1C94BDE89688 \
+ ; do \
+ gpg --batch --keyserver hkps://pgp.surf.nl --recv-keys "$key" || \
+ gpg --batch --keyserver hkps://keyserver.ubuntu.com --recv-keys "$key" ; \
+ done \
+ && gpg --batch --verify apache-maven-${MAVEN_VERSION}-bin.tar.gz.asc apache-maven-${MAVEN_VERSION}-bin.tar.gz \