Dockerfile

FROM openjdk:8-jdk-alpine

CMD ["groovysh"]

ENV GROOVY_HOME /opt/groovy
ENV GROOVY_VERSION 3.0.0-alpha-3

RUN set -o errexit -o nounset \
    && echo "Installing build dependencies" \
    && apk add --no-cache --virtual .build-deps \
        gnupg \
    \
    && echo "Downloading Groovy" \
    && wget -qO groovy.zip "https://dist.apache.org/repos/dist/release/groovy/${GROOVY_VERSION}/distribution/apache-groovy-binary-${GROOVY_VERSION}.zip" \
    \
    && echo "Importing keys listed in http://www.apache.org/dist/groovy/KEYS from key server" \
    && export GNUPGHOME="$(mktemp -d)"; \
    for key in \
        "7FAA0F2206DE228F0DB01AD741321490758AAD6F" \
        "331224E1D7BE883D16E8A685825C06C827AF6B66" \
        "34441E504A937F43EB0DAEF96A65176A0FB1CD0B" \
        "9A810E3B766E089FFB27C70F11B595CEDC4AEBB5" \
        "81CABC23EECA0790E8989B361FF96E10F0E13706" \
    ; do \
        for server in \
            "ha.pool.sks-keyservers.net" \
            "hkp://p80.pool.sks-keyservers.net:80" \
            "pgp.mit.edu" \
        ; do \
            echo "  Trying ${server}"; \
            if gpg --keyserver "${server}" --recv-keys "${key}"; then \
                break; \
            fi; \
        done; \
    done; \
    if [ $(gpg --list-keys | grep -c "pub ") -ne 5 ]; then \
        echo "ERROR: Failed to fetch GPG keys" >&2; \
        exit 1; \
    fi \
    \
    && echo "Checking download signature" \
    && wget -qO groovy.zip.asc "https://dist.apache.org/repos/dist/release/groovy/${GROOVY_VERSION}/distribution/apache-groovy-binary-${GROOVY_VERSION}.zip.asc" \
    && gpg --batch --verify groovy.zip.asc groovy.zip \
    && rm -rf "${GNUPGHOME}" \
    && rm groovy.zip.asc \
    \
    && echo "Installing Groovy" \
    && unzip groovy.zip \
    && rm groovy.zip \
    && mkdir /opt \
    && mv "groovy-${GROOVY_VERSION}" "${GROOVY_HOME}/" \
    && ln -s "${GROOVY_HOME}/bin/grape" /usr/bin/grape \
    && ln -s "${GROOVY_HOME}/bin/groovy" /usr/bin/groovy \
    && ln -s "${GROOVY_HOME}/bin/groovyc" /usr/bin/groovyc \
    && ln -s "${GROOVY_HOME}/bin/groovyConsole" /usr/bin/groovyConsole \
    && ln -s "${GROOVY_HOME}/bin/groovydoc" /usr/bin/groovydoc \
    && ln -s "${GROOVY_HOME}/bin/groovysh" /usr/bin/groovysh \
    && ln -s "${GROOVY_HOME}/bin/java2groovy" /usr/bin/java2groovy \
    \
    && echo "Cleaning up build dependencies" \
    && apk del .build-deps \
    \
    && echo "Adding groovy user and group" \
    && addgroup -S -g 1000 groovy \
    && adduser -D -S -G groovy -u 1000 -s /bin/ash groovy \
    && mkdir -p /home/groovy/.groovy/grapes \
    && chown -R groovy:groovy /home/groovy \
    \
    && echo "Symlinking root .groovy to groovy .groovy" \
    && ln -s /home/groovy/.groovy /root/.groovy

# Create Grapes volume
USER groovy
VOLUME "/home/groovy/.groovy/grapes"
WORKDIR /home/groovy

RUN set -o errexit -o nounset \
    && echo "Testing Groovy installation" \
    && groovy --version