Dockerfile to set up the environment needed to run a GWC release

Dockerfile

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+# Use an official Ruby 2.x image as a base
+FROM ruby:2.7
+
+# Set environment variables
+ENV DEBIAN_FRONTEND=noninteractive
+ENV EDITOR=vim
+
+# Install dependencies and tools
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    git \
+    wget \
+    unzip \
+    openjdk-11-jdk \
+    python3-pip \
+    dos2unix \
+    vim \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Maven 3.9.9
+RUN wget https://dlcdn.apache.org/maven/maven-3/3.9.9/binaries/apache-maven-3.9.9-bin.zip -O /tmp/maven.zip && \
+    unzip /tmp/maven.zip -d /opt && \
+    ln -s /opt/apache-maven-3.9.9 /opt/maven && \
+    ln -s /opt/maven/bin/mvn /usr/bin/mvn && \
+    rm /tmp/maven.zip
+
+# Set Maven environment variables
+ENV MAVEN_HOME=/opt/maven
+ENV PATH=$MAVEN_HOME/bin:$PATH
+
+# Prepare settings.xml file
+COPY settings.xml /root/.m2/settings.xml
+
+# Install the latest Sphinx
+RUN pip3 install --upgrade pip && \
+    pip3 install --upgrade sphinx
+
+# Install XSDDoc (assuming the latest version is 0.11) and fix line endings
+RUN wget https://sourceforge.net/projects/xframe/files/xsddoc/xsddoc-1.0/xsddoc-1.0.zip/download -O /tmp/xsddoc.zip && \
+    unzip /tmp/xsddoc.zip -d /opt && \
+    dos2unix /opt/xsddoc-1.0/bin/xsddoc && \
+    chmod +x /opt/xsddoc-1.0/bin/xsddoc && \
+    rm /tmp/xsddoc.zip
+
+# Patch XSDDoc to run on Java 11
+RUN curl "https://repo1.maven.org/maven2/xerces/xercesImpl/2.12.2/xercesImpl-2.12.2.jar" -o /opt/xsddoc-1.0/lib/xercesImpl.jar
+
+# Set Java environment variables
+ENV JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
+ENV PATH=$JAVA_HOME/bin:/opt/xsddoc-1.0/bin:$PATH
+
+# Clone the GeoWebCache repositories
+RUN git clone https://github.com/GeoWebCache/gwc-release.git /root/gwc-release
+RUN git clone https://github.com/GeoWebCache/geowebcache.git /root/geowebcache
+RUN cp /root/gwc-release/release.rb /root/geowebcache
+
+# Make sure the release.rb dependencies are installed
+RUN gem install bundler -v 2.4.22
+RUN cd /root/gwc-release && bundle install
+
+# Copy the git setup script into the container
+COPY setup_git.sh /usr/local/bin/setup_git.sh
+
+# Make the script executable
+RUN chmod +x /usr/local/bin/setup_git.sh
+
+# Set the script as the entrypoint
+ENTRYPOINT ["/usr/local/bin/setup_git.sh"]
+
+# Get in the home directory when the shell is executed
+WORKDIR /root
+
+# By default, run a bash shell
+CMD ["/bin/bash"]
+

settings.xml

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+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                      http://maven.apache.org/xsd/settings-1.0.0.xsd">
+  <servers>
+    <server>
+      <id>nexus</id>
+      <username>yourNameHere</username>
+      <password>yourPasswordHere</password>
+    </server>
+  </servers>
+</settings>

setup_git.sh

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+#!/bin/bash
+# Exit on error
+set -e
+
+# Configure Git username and email if provided
+if [ -n "$GIT_USERNAME" ]; then
+    git config --global user.name "$GIT_USERNAME"
+fi
+
+if [ -n "$GIT_EMAIL" ]; then
+    git config --global user.email "$GIT_EMAIL"
+fi
+
+exec /bin/bash