zrsync_install

#!/bin/bash

GITHUB="https://github.com/dansan/zrsync"
ZRSYNC_DIR="$HOME/.zrsync/zrsync"
VIRTENV_DIR="$HOME/.zrsync/virtenv"
SCRIPT_DIR="$HOME/bin"

if [[ -e /etc/os-release ]]; then
	DISTRO=$(grep ID /etc/os-release | cut -f 2 -d =)
else
	if [[ -n "$(which lsb_release)" ]]; then
		DISTRO=$(lsb_release -is)
	fi
fi

if [[ "$DISTRO" = "Debian" ]]; then
	PACKAGES="git virtualenv librsync1 libzmq3-dev"
	INST_EXE=/usr/bin/apt-get
	INST_CMD=install
elif [[ "$DISTRO" = "Univention" ]]; then
	PACKAGES="git python-virtualenv librsync1 libzmq-dev"
	INST_EXE=/usr/sbin/univention-install
	INST_CMD=""
elif [[ "$DISTRO" = "gentoo" ]]; then
	# TODO
	echo "NotImplementedYet"
	exit 1
else
	echo "Don't know distribution, exiting."
	exit 1
fi

if ! [[ -x "$INST_EXE" ]]; then
	echo "Cannot find or run package manager \"$INST_EXE\", exiting."
	exit 1
fi

echo "Checking package dependencies..."
declare -a INST_PCK=()
if [[ "$DISTRO" = "Debian" -o "$DISTRO" = "Univention" ]]; then
	# use "dpkg-query -l" to check installation state
	for PCK in ${PACKAGES}; do
		if ! dpkg-query -l ${PCK} >/dev/null 2>&1; then
			INST_PCK+=(${PCK})
		fi
	done
fi

if [[ -n "$INST_PCK" ]]; then
	if [[ "$UID" = "0" ]]; then
		DO_SUDO=""
	else
		echo "You are not root, trying with sudo..."
		DO_SUDO="sudo"
	fi
	echo "Running $DO_SUDO $INST_EXE $INST_CMD ${INST_PCK[@]} ..."
	${DO_SUDO} ${INST_EXE} ${INST_CMD} ${INST_PCK[@]} || exit 1
else
	echo "Nothing to install."
fi

echo "Cloning $GITHUB to $ZRSYNC_DIR..."
git clone ${GITHUB} ${ZRSYNC_DIR} || exit 1

echo "Installing Python virtual env in $VIRTENV_DIR..."
# install from empty dir, cause pip-1.5 crashes on HTML files with umlauts in cwd
TMP_DIR=$(mktemp -d)
cd ${TMP_DIR}
mkdir -pv ${VIRTENV_DIR} || exit 1
virtualenv ${VIRTENV_DIR} || exit 1
cd -
rmdir ${TMP_DIR}

if [[ "$DISTRO" = "Univention" ]]; then
	ln -s python ${VIRTENV_DIR}/bin/python3
fi

source ${VIRTENV_DIR}/bin/activate || exit 1

echo "Updating pip..."
if [[ "$DISTRO" = "Univention" ]]; then
	# ancient pip version
	pip install -U 'https://pypi.python.org/packages/e7/a8/7556133689add8d1a54c0b14aeff0acb03c64707ce100ecd53934da1aa13/pip-8.1.2.tar.gz#md5=87083c0b9867963b29f7aba3613e8f4a' || exit 1
fi
pip install --compile -U pip || exit 1

# python-librsync version in pypi repo is broken
echo "Installing python-librsync from Github..."
pip install --compile -U git+https://github.com/smartfile/python-librsync.git || exit 1

echo "Installing remaining requirements..."
pip install --compile -U -r "$ZRSYNC_DIR/requirements.txt" || exit 1

echo "Creating startup scripts in $SCRIPT_DIR..."
mkdir -pv "$SCRIPT_DIR"
cat <<-EOF >"$SCRIPT_DIR/zrsync"
#!/bin/sh
exec ${VIRTENV_DIR}/bin/python3 ${ZRSYNC_DIR}/zrsync/zrsync.py \$@
EOF
cat <<-EOF >"$SCRIPT_DIR/zrsyncd"
#!/bin/sh
exec ${VIRTENV_DIR}/bin/python3 ${ZRSYNC_DIR}/zrsync/zrsyncd.py \$@
EOF
chmod +x "$SCRIPT_DIR/zrsync" "$SCRIPT_DIR/zrsyncd"

echo "Sucessfully installed zrsync in $ZRSYNC_DIR and a Python virtualenv"
echo "in $VIRTENV_DIR."
echo "Convenience startup scripts were installed to $SCRIPT_DIR/zrsync and $SCRIPT_DIR/zrsyncd."