#!/bin/bash
# Setup development environment on Debian and derivatives such as Ubuntu
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# We drag in tools that might not be needed by all users; it's easier
# that way.
#

if [ "$1" = "--help" ]
then
	printf "\\nUtility to setup a debian-based system for Wireshark Development.\\n"
	printf "The basic usage installs the needed software\\n\\n"
	printf "Usage: %s [--install-optional] [--install-deb-deps] [...other options...]\\n" "$0"
	printf "\\t--install-optional: install optional software as well\\n"
	printf "\\t--install-deb-deps: install packages required to build the .deb file\\n"
	printf "\\t[other]: other options are passed as-is to apt\\n"
	exit 1
fi

# Check if the user is root
if [ "$(id -u)" -ne 0 ]
then
	echo "You must be root."
	exit 1
fi

for op
do
	if [ "$op" = "--install-optional" ]
	then
		ADDITIONAL=1
	elif [ "$op" = "--install-deb-deps" ]
	then
		DEBDEPS=1
	else
		OPTIONS="$OPTIONS $op"
	fi
done

BASIC_LIST="qttools5-dev \
	qttools5-dev-tools \
	libqt5svg5-dev \
	qtmultimedia5-dev \
	qt5-default \
	libpcap-dev \
	bison \
	flex \
	make \
	python \
	perl \
	libgcrypt-dev"

ADDITIONAL_LIST="libnl-3-dev \
	libc-ares-dev \
	libkrb5-dev \
	libsmi2-dev \
	asciidoctor \
	libsbc-dev \
	liblua5.2-dev \
	libnl-cli-3-dev \
	libparse-yapp-perl \
	libcap-dev \
	liblz4-dev \
	libsnappy-dev \
	libspandsp-dev \
	libxml2-dev \
	git \
	libjson-glib-dev \
	ninja-build \
	doxygen \
	xsltproc"

DEBDEPS_LIST="debhelper \
	po-debconf \
	python-ply \
	docbook-xsl \
	docbook-xml \
	libxml2-utils \
	quilt"

# Adds package $2 to list variable $1 if the package is found.
# If $3 is given, then this version requirement must be satisfied.
add_package() {
	local list="$1" pkgname="$2" versionreq="$3" version

	version=$(apt-cache show "$pkgname" 2>/dev/null |
		awk '/^Version:/{ print $2; exit}')
	# fail if the package is not known
	if [ -z "$version" ]; then
		return 1
	elif [ -n "$versionreq" ]; then
		# Require minimum version or fail.
		# shellcheck disable=SC2086
		dpkg --compare-versions $version $versionreq || return 1
	fi

	# package is found, append it to list
	eval "${list}=\"\${${list}} \${pkgname}\""
}

# cmake3 3.5.1: Ubuntu 14.04
# cmake >= 3.5: Debian >= jessie-backports, Ubuntu >= 16.04
add_package BASIC_LIST cmake3 ||
BASIC_LIST="$BASIC_LIST cmake"

# Debian >= wheezy-backports, Ubuntu >= 16.04
add_package ADDITIONAL_LIST libnghttp2-dev ||
echo "libnghttp2-dev is unavailable" >&2

# libssh-gcrypt-dev: Debian >= jessie, Ubuntu >= 16.04
# libssh-dev (>= 0.6): Debian >= jessie, Ubuntu >= 14.04
add_package ADDITIONAL_LIST libssh-gcrypt-dev ||
add_package ADDITIONAL_LIST libssh-dev ||
echo "libssh-gcrypt-dev and libssh-dev are unavailable" >&2

# libgnutls-dev: Debian <= jessie, Ubuntu <= 16.04
# libgnutls28-dev: Debian >= wheezy-backports, Ubuntu >= 12.04
add_package ADDITIONAL_LIST libgnutls28-dev ">= 3.2.14-1" ||
add_package ADDITIONAL_LIST libgnutls-dev ||
echo "libgnutls28-dev and libgnutls-dev are unavailable" >&2

# mmdbresolve
add_package ADDITIONAL_LIST libmaxminddb-dev ||
echo "libmaxminddb-dev is unavailable" >&2

# libsystemd-journal-dev: Ubuntu 14.04
# libsystemd-dev: Ubuntu >= 16.04
add_package DEBDEPS_LIST libsystemd-dev ||
add_package DEBDEPS_LIST libsystemd-journal-dev ||
echo "libsystemd-dev is unavailable"

ACTUAL_LIST=$BASIC_LIST

# Now arrange for optional support libraries
if [ $ADDITIONAL ]
then
	ACTUAL_LIST="$ACTUAL_LIST $ADDITIONAL_LIST"
fi

if [ $DEBDEPS ]
then
	ACTUAL_LIST="$ACTUAL_LIST $DEBDEPS_LIST"
fi

apt-get update || exit 2
# shellcheck disable=SC2086
apt-get install $ACTUAL_LIST $OPTIONS || exit 2

if [ ! $ADDITIONAL ]
then
	printf "\\n*** Optional packages not installed. Rerun with --install-optional to have them.\\n"
fi

if [ ! $DEBDEPS ]
then
	printf "\n*** Debian packages build deps not installed. Rerun with --install-deb-deps to have them.\n"
fi