#! /bin/bash -l
# Time-stamp: <Wed 2020-12-23 18:59 svarrette>
############################################################################
# Install tmux 2.9a on Centos
# Adapted from https://gist.github.com/j3j3k/2378f8e7bca7bcda7ffab16b6b97a328

CMD_PREFIX=

TMUX_VERSION=2.9a
LIBEVENT_VERSION=2.1.10-stable

STOWDIR=${STOWDIR:=$HOME/stow}

################################################################################
print_error_and_exit() { echo "*** ERROR *** $*"; exit 1; }
usage() {
    cat <<EOF
NAME
  $(basename $0):Build and install using stow tmux version ${TMUX_VERSION}
USAGE
  $0 [-n]
  $0 [-n] --clean
OPTIONS:
  -n --dry-run: Dry run mode
  --clean:  cleanup and remove build/install files
EOF
}
cleanup() {
    for n in tmux-${TMUX_VERSION} libevent-${LIBEVENT_VERSION} ; do
        [ -f "${n}.tar.gz" ] && ${CMD_PREFIX} rm -f ${n}.tar.gz
        if [ -d "${STOWDIR}/${n}" ]; then
            ${CMD_PREFIX} stow -d ${STOWDIR} -D ${n}
            ${CMD_PREFIX} rm -rf ${STOWDIR}/${n}
            ${CMD_PREFIX} rm -rf ${n}
        fi
    done
}
################################################################################
# Check for options
while [ $# -ge 1 ]; do
    case $1 in
        -h | --help) usage; exit 0;;
        -n | --noop | --dry-run) CMD_PREFIX=echo;;
        -c | --clean) cleanup; exit 0;;
        *) TMUX_VERSION=$*; break;;
    esac
    shift
done
# install deps
# yum install gcc kernel-devel make ncurses-devel stow

# Prepare Stow
mkdir -p ${STOWDIR} ~/bin ~/include ~/lib


# DOWNLOAD SOURCES FOR LIBEVENT AND MAKE AND INSTALL
echo "==> Download and install libevent ${LIBEVENT_VERSION}"
[ ! -f "libevent-${LIBEVENT_VERSION}.tar.gz" ] && \
    ${CMD_PREFIX} curl -LOk https://github.com/libevent/libevent/releases/download/release-${LIBEVENT_VERSION}/libevent-${LIBEVENT_VERSION}.tar.gz
# Build if not yet done
if [ ! -f "${STOWDIR}/libevent-${LIBEVENT_VERSION}/include/event.h" ]; then
    echo "   ... building libevent "
    ${CMD_PREFIX} tar xf libevent-${LIBEVENT_VERSION}.tar.gz
    ${CMD_PREFIX} cd libevent-${LIBEVENT_VERSION}
    ${CMD_PREFIX} ./configure --prefix=${STOWDIR}/libevent-${LIBEVENT_VERSION}
    ${CMD_PREFIX} make
    ${CMD_PREFIX} make install
fi


# DOWNLOAD SOURCES FOR TMUX AND MAKE AND INSTALL
echo "==> Download and install Tmux ${TMUX_VERSION}"
[ ! -f "tmux-${TMUX_VERSION}.tar.gz" ] && \
    ${CMD_PREFIX} curl -LOk https://github.com/tmux/tmux/releases/download/${TMUX_VERSION}/tmux-${TMUX_VERSION}.tar.gz
# Build if not yet done
if [ ! -f "${STOWDIR}/tmux-${TMUX_VERSION}/bin/tmux" ]; then
    echo "   ... building tmux "
    ${CMD_PREFIX} tar xf tmux-${TMUX_VERSION}.tar.gz
    ${CMD_PREFIX} cd tmux-${TMUX_VERSION}
    ${CMD_PREFIX} ./configure --prefix=${STOWDIR}/tmux-${TMUX_VERSION}
    ${CMD_PREFIX} make
    ${CMD_PREFIX} make install
fi
echo "=> enable tmux"
${CMD_PREFIX} stow -d ${STOWDIR} tmux-${TMUX_VERSION}

# ${CMD_PREFIX} pkill tmux
# close your terminal window (flushes cached tmux executable)
# open new shell and check tmux version
${CMD_PREFIX} tmux -V