#!/bin/sh
#
#############################################################################
#
# Script meant to be used for Continuous Integration automation for POSIX
# systems. On GitHub, this is used by Ubuntu and MacOS builds.
#
#############################################################################
#
# Author: Jia Tan
#
# This file has been put into the public domain.
# You can do whatever you want with this file.
#
#############################################################################

set -e

USAGE="Usage: $0
  -b [autotools|cmake]
  -c [crc32|crc64|sha256]
  -d [encoders|decoders|bcj|delta|threads]
  -l [destdir]
  -s [srcdir]
  -p [all|build|test]
  -f [CFLAGS]"

# Absolute path of script directory
ABS_DIR=$(cd -- "$(dirname -- "$0")" && pwd)

# Default CLI option values
BUILD_SYSTEM="autotools"
CHECK_TYPE="crc32,crc64,sha256"
BCJ="y"
DELTA="y"
ENCODERS="y"
DECODERS="y"
THREADS="y"
SRC_DIR="$ABS_DIR/../"
DEST_DIR="$SRC_DIR/../xz_build"
PHASE="all"

# Parse arguments
while getopts b:c:d:l:s:p:f:h opt; do
	# b option can have either value "autotools" OR "cmake"
	case ${opt} in
	h)
		echo "$USAGE"
		exit 0
	;;
	b)
		case "$OPTARG" in
			autotools) ;;
			cmake) ;;
			*) echo "Invalid build system: $OPTARG"; exit 1;;
		esac
		BUILD_SYSTEM="$OPTARG"
	;;
	# c options can be a comma separated list of check types to support
	c)
	for crc in $(echo $OPTARG | sed "s/,/ /g"); do 
		case "$crc" in
		crc32) ;;
		crc64) ;;
		sha256) ;;
		*) echo "Invalid check type: $crc"; exit 1 ;;
		esac
	done
	CHECK_TYPE="$OPTARG"
	;;
	# d options can be a comma separated list of things to disable at
	# configure time
	d)
	for disable_arg in $(echo $OPTARG | sed "s/,/ /g"); do 
		case "$disable_arg" in
		encoders) ENCODERS="n" ;;
		decoders) DECODERS="n" ;;
		bcj) BCJ="n" ;;
		delta) DELTA="n" ;;
		threads) THREADS="n" ;;
		*) echo "Invalid disable value: $disable_arg"; exit 1 ;;
		esac
	done	
	;;
	l) DEST_DIR="$OPTARG"
	;;
	s) SRC_DIR="$OPTARG"
	;;
	p) PHASE="$OPTARG"
	;;
	f) 
	CFLAGS="$OPTARG"
	export CFLAGS
	;;
	esac
done

if [ "$PHASE" = "all" ] || [ "$PHASE" = "build" ]; then
	# Build based on arguments
	mkdir -p "$DEST_DIR"
	case $BUILD_SYSTEM in
		autotools)
		# Run autogen.sh script
		cd "$SRC_DIR"
		"./autogen.sh"
		cd "$DEST_DIR"
		# Generate configure option values

		EXTRA_OPTIONS=""
		FILTER_LIST="lzma1,lzma2"

		if [ "$BCJ" = "y" ]
		then
			FILTER_LIST="$FILTER_LIST,x86,powerpc,ia64,arm,armthumb,arm64,sparc"
		fi

		if [ "$DELTA" = "y" ]
		then
			FILTER_LIST="$FILTER_LIST,delta"
		fi

		if [ "$ENCODERS" = "y" ]
		then
			EXTRA_OPTIONS="$EXTRA_OPTIONS --enable-encoders=$FILTER_LIST"
		else
			EXTRA_OPTIONS="$EXTRA_OPTIONS --disable-encoders"
		fi

		if [ "$DECODERS" = "y" ]
		then
			EXTRA_OPTIONS="$EXTRA_OPTIONS --enable-decoders=$FILTER_LIST"
		else
			EXTRA_OPTIONS="$EXTRA_OPTIONS --disable-decoders"
		fi

		if [ "$THREADS" = "n" ]
		then
			EXTRA_OPTIONS="$EXTRA_OPTIONS --disable-threads"
		fi

		# Run configure script
		"$SRC_DIR"/configure --enable-werror --enable-checks=$CHECK_TYPE $EXTRA_OPTIONS

		# Build the project
		make
		;;
		cmake)
		# CMake currently does not support disabling encoders, decoders,
		# threading, or check types. For now, just run the full build.
		cd "$DEST_DIR"
		cmake "$SRC_DIR/CMakeLists.txt" -B "$DEST_DIR"
		make
		;;
	esac
fi

if [ "$PHASE" = "all" ] || [ "$PHASE" = "test" ]; then
	case $BUILD_SYSTEM in
		autotools)
			cd "$DEST_DIR"
			make check
		;;
		cmake)
			cd "$DEST_DIR"
			make "test"
		;;
	esac
fi