Download Maven artifact from Nexus with current version in Dockerfile

DownloadMavenNexusDockerfile

# SHORT VERSION, if artifactId and groupId are hard-coded
FROM maven:3-jdk-11

# Add sources including pom.xml to Docker build context and use as workdir for later Maven execution
ADD . /build
WORKDIR /build

# Download Maven artifact from Nexus with current version
# And do it all inside ONE 'RUN' statement, see https://stackoverflow.com/a/37860420/4964553
# Otherwise you can't define vars like ARTIFACT_VERSION for later steps in following 'RUN' commands!
RUN \
    # Export current Maven Artifact version from pom.xml with https://stackoverflow.com/a/26514030/4964553
    export ARTIFACT_VERSION=$(mvn -q \
    -Dexec.executable=echo \
    -Dexec.args='${project.version}' \
    --non-recursive \
    exec:exec); \
    \
    # Show Maven Artifact version
    echo "Artifact version used $ARTIFACT_VERSION"; \
    \
    # Download Maven Artifact with current version
    # see https://stackoverflow.com/questions/1895492/how-can-i-download-a-specific-maven-artifact-in-one-command-line
    mvn dependency:get \
    -DremoteRepositories=https://nexus.your.lan/repository/maven-public/ \
    -DgroupId=your.group.id \
    -DartifactId=your-artifact-id \
    -Dversion=$ARTIFACT_VERSION \
    -Dpackaging=war \
    -Dtransitive=false;
    
# LONG VERSION, where artifactId and groupId are also dynamically set by pom.xml values
FROM maven:3-jdk-11

# Add sources including pom.xml to Docker build context and use as workdir for later Maven execution
ADD . /build
WORKDIR /build

# define your Nexus Repository URL
ARG NEXUS_URL=https://nexus.your.lan/repository/maven-public/

# Download Maven artifact from Nexus with current version
# And do it all inside ONE 'RUN' statement, see https://stackoverflow.com/a/37860420/4964553
# Otherwise you can't define vars like ARTIFACT_VERSION for later steps in following 'RUN' commands!
RUN \
    # Export current version from pom.xml with https://stackoverflow.com/a/26514030/4964553
    export ARTIFACT_VERSION=$(mvn -q \
    -Dexec.executable=echo \
    -Dexec.args='${project.version}' \
    --non-recursive \
    exec:exec); \
    \
    echo "version: $ARTIFACT_VERSION"; \
    \
    # Export groupId from pom.xml with https://stackoverflow.com/a/26514030/4964553
    export ARTIFACT_GROUP_ID=$(mvn -q \
    -Dexec.executable=echo \
    -Dexec.args='${project.groupId}' \
    --non-recursive \
    exec:exec); \
    \
    echo "groupId: $ARTIFACT_GROUP_ID"; \
    \
    # Export artifactId from pom.xml with https://stackoverflow.com/a/26514030/4964553
    export ARTIFACT_ID=$(mvn -q \
    -Dexec.executable=echo \
    -Dexec.args='${project.artifactId}' \
    --non-recursive \
    exec:exec); \
    \
    echo "artifactId: $ARTIFACT_ID"; \
    \
    # Export packaging from pom.xml with https://stackoverflow.com/a/26514030/4964553
    export PACKAGING=$(mvn -q \
    -Dexec.executable=echo \
    -Dexec.args='${project.packaging}' \
    --non-recursive \
    exec:exec); \
    \
    echo "packaging: $PACKAGING"; \
    \
    # Download Maven Artifact with current version
    # see https://stackoverflow.com/questions/1895492/how-can-i-download-a-specific-maven-artifact-in-one-command-line
    mvn dependency:get \
    -DremoteRepositories=$NEXUS_URL \
    -DgroupId=$ARTIFACT_GROUP_ID \
    -DartifactId=$ARTIFACT_ID \
    -Dversion=$ARTIFACT_VERSION \
    -Dpackaging=$PACKAGING \
    -Dtransitive=false \
    -Ddest=$ARTIFACT_ID-$ARTIFACT_VERSION.$PACKAGING;

RUN ls -la