#!/bin/bash

# This build script is for running the Jenkins builds using docker.
#

# Trace bash processing
set -x

# Default variables
WORKSPACE=${WORKSPACE:-${HOME}/${RANDOM}${RANDOM}}
http_proxy=${http_proxy:-}

# Timestamp for job
echo "Build started, $(date)"

# Configure docker build
if [[ -n "${http_proxy}" ]]; then
    PROXY="RUN echo \"Acquire::http::Proxy \\"\"${http_proxy}/\\"\";\" > /etc/apt/apt.conf.d/000apt-cacher-ng-proxy"
fi

Dockerfile=$(cat << EOF
FROM ubuntu:16.04

${PROXY}

ENV DEBIAN_FRONTEND noninteractive
RUN apt-get update && apt-get install -yy \
	make \
	texlive-xetex \
	pandoc \
	fonts-inconsolata \
	fonts-linuxlibertine

RUN grep -q ${GROUPS[0]} /etc/group || groupadd -g ${GROUPS[0]} ${USER}
RUN grep -q ${UID} /etc/passwd || useradd -d ${HOME} -m -u ${UID} -g ${GROUPS[0]} ${USER}

USER ${USER}
ENV HOME ${HOME}
RUN /bin/bash
EOF
)

# Build the docker container
if ! docker build -t linux-build/ubuntu - <<< "${Dockerfile}" ; then
    echo "Failed to build docker container."
    exit 1
fi

# Create the docker run script
export PROXY_HOST=${http_proxy/#http*:\/\/}
export PROXY_HOST=${PROXY_HOST/%:[0-9]*}
export PROXY_PORT=${http_proxy/#http*:\/\/*:}

mkdir -p "${WORKSPACE}"

cat > "${WORKSPACE}"/build.sh << EOF_SCRIPT
#!/bin/bash

set -x

cd ${WORKSPACE}

# Go into the linux directory (the script will put us in a build subdir)
cd docs

make

EOF_SCRIPT

chmod a+x "${WORKSPACE}/build.sh"

# Run the docker container, execute the build script we just built
docker run --cap-add=sys_admin --net=host --rm=true -e WORKSPACE="${WORKSPACE}" --user="${USER}" \
    -w "${HOME}" -v "${HOME}":"${HOME}" -t linux-build/ubuntu "${WORKSPACE}/build.sh"