#!/bin/bash

# EXAMPLES
usage() {
  echo "usage: " \
  "NAME=app " \
  "COPYCONFIG=../build/sample-config/*.conf " \
  "VERSION=1.2-3 " \
  "PLATFORM=amd64 " \
  "COPYEXEC=../build/release/app " \
  "sh build-deb.sh"
  exit 1
}

echo "Build file for dpkg-deb: https://git.blubbfish.net/vs_utils/CI-Scripts/src/branch/master/deb/build-deb.sh"

if [ -z "${NAME}" ]; then
  usage  
fi

if [ -z "${HOME}" ]; then
  echo "HOME variable was not set, chech yout system!"
  exit 1
fi

if [ -z "${COPYCONFIG}" ]; then
  usage  
fi

if [ -z "${VERSION}" ]; then
  usage  
fi

if [ -z "${PLATFORM}" ]; then
  usage  
fi

if [ -z "${COPYEXEC}" ]; then
  usage  
fi

echo "1. Catch all paths together for ${NAME}."

HOMEDIR=${HOME}
ROOT="${HOMEDIR}/deb"

EXEC="${ROOT}/usr/local/bin/${NAME}"
CONFIG="${ROOT}/etc/${NAME}"
SHARE="${ROOT}/usr/share/${NAME}"
SYSTEMD="${ROOT}/lib/systemd/system"
DEBIAN="${ROOT}/DEBIAN"
LOGROTATE="${SHARE}/logrotate.d"
TARGETFILE="${NAME}_${VERSION}_${PLATFORM}.deb"

echo "2. Versionsumber and Arch: ${VERSION}, ${PLATFORM}."

echo "3. Create directorys."

mkdir -p ${EXEC}
mkdir -p ${CONFIG}
mkdir -p ${SHARE}/etc
mkdir -p ${SYSTEMD}
mkdir -p ${DEBIAN}
if [ -f "logrotate-${NAME}" ]; then
  mkdir -p ${LOGROTATE}
  mkdir -p ${ROOT}/etc/logrotate.d
fi

echo "4. Copy deb control files."

cp control ${DEBIAN}/control
cp postinst ${DEBIAN}
cp prerm ${DEBIAN}

echo "5. Copy ${NAME}.service to ${SYSTEMD}."

cp "service-${NAME}" "${SYSTEMD}/${NAME}.service"

echo "6. Copy programm files to ${EXEC}."

cp -r -t ${EXEC}/ ${COPYEXEC} 

echo "7. Copy example-conf to ${SHARE}/etc."

cp -t ${SHARE}/etc/ ${COPYCONFIG}
touch ${DEBIAN}/conffiles
find ${SHARE}/etc -type f -printf "/usr/share/${NAME}/etc/%P\n" > ${DEBIAN}/conffiles

echo "8. Copy ${NAME}.conf to ${LOGROTATE}."
if [ -f "logrotate-${NAME}" ]; then
  cp "logrotate-${NAME}" "${LOGROTATE}/${NAME}.conf"
  echo "/usr/share/${NAME}/logrotate.d/${NAME}.conf" >> ${DEBIAN}/conffiles
else
  echo "No logrotate found"
fi

echo "9. Creating md5sum"

touch ${DEBIAN}/md5sums
pushd ${ROOT} >> /dev/null
find . -path ./{DEBIAN} -prune -o -type f -exec md5sum {} \; | sed "s-./--" >> ${DEBIAN}/md5sums
popd >> /dev/null

echo "10. Setting permissions"

chmod -R 755 ${DEBIAN}
chmod 644 ${SYSTEMD}/"${NAME}.service"
chmod -R 755 ${EXEC}
chmod 644 ${SHARE}/etc/*
chmod 755 ${CONFIG}
if [ -f "logrotate-${NAME}" ]; then
  chmod 644 ${LOGROTATE}/*
fi

echo "11. Build deb packet."

dpkg-deb --build ${ROOT}

echo "12. Move ${TARGETFILE} to Builds."

mv ${HOMEDIR}/deb.deb "../Builds/${TARGETFILE}"
echo "::set-output name=debuilderfile::${TARGETFILE}"

echo "13. Cleanup ${HOMEDIR}/deb."

rm ${HOMEDIR}/deb -r

echo "All steps completed."