Reference Implementation - Minimal one to install JDTLS in Docker container

Docker.jdtls

# Use official Maven image with JDK 21
FROM maven:3.9.6-eclipse-temurin-21

# Install dependencies for JDTLS (Python is required for the wrapper script)
RUN apt-get update && apt-get install -y \
    python3 \
    wget \
    tar \
    && rm -rf /var/lib/apt/lists/*

# Set JDTLS version and path
ENV JDTLS_HOME=/opt/jdtls
RUN mkdir -p $JDTLS_HOME

# Download and extract the latest JDTLS snapshot
RUN wget -qO- https://download.eclipse.org/jdtls/snapshots/jdt-language-server-latest.tar.gz \
    | tar -xvz -C $JDTLS_HOME

# Create a symlink to the jdtls executable script
RUN ln -s $JDTLS_HOME/bin/jdtls /usr/local/bin/jdtls

ENTRYPOINT ["bash", "-i"]