#/bin/sh

set -e

usage() {
	cat << EOF
usage:
    install_vmod URL [SHA512SUM]
environment variables:
    SKIP_CHECK: if non-empty, tests are not run before installing
deps:
    - varnish development files
    - curl
    - pkg-config
    - nproc
    - make
    - gcc
    - automake
    - libtoolize
    - whatever dependencies the vmod needs
EOF
	exit $1
}

maybe_help() {
	if [ "$1" = "-h" -o "$1" = "-help" -o "$1" = "--help" ]; then
		usage
		exit
	fi
}

check_bin() {
	if ! command "$@" >/dev/null 2>&1; then
		echo "please install $1"
		exit 1
	fi
}

check_bin curl --version
check_bin tar --version

if ! pkg-config varnishapi; then
	echo "pkg-config couldn't find varnishapi (did you install the varnish dev file/package?)"
	exit 1
fi

if [ $# != 1 -a $# != 2 ]; then
	usage 1
fi

maybe_help "$1"
maybe_help "$2"

if [ -n "$1" ]; then
	URL="$1"
else
	echo no TARBALL specified
	exit 1
fi

SHA512SUM="$2"

set -x

rm -rf /tmp/module_to_build
mkdir /tmp/module_to_build

if [ -e "$URL" ]; then
	cp "$URL" /tmp/module_to_build/src.tar.gz
else
	curl -fLo /tmp/module_to_build/src.tar.gz "$URL"
fi

cd /tmp/module_to_build

if [ -n "$SHA512SUM" ]; then
	echo "$SHA512SUM  src.tar.gz" | sha512sum -c -
fi
tar xavf src.tar.gz --strip 1

if [ -e Cargo.toml ]; then
	check_bin cargo
	cargo build --release
else
	check_bin automake --version
	check_bin gcc --version
	check_bin libtoolize --version
	check_bin make --version
	check_bin nproc
	check_bin pkg-config --version
	check_bin rst2man --version

	if [ ! -x configure ]; then
		if [ -e autogen.sh ]; then
			./autogen.sh
			./configure
		elif [ -e bootstrap ]; then
			./bootstrap
			# bootstrap may or may not have called configure
			if [ ! -e Makefile ]; then
				./configure
			fi
		fi
	else
		./configure
	fi
fi

if [ -z "$SKIP_CHECK" ]; then
	if [ -e Cargo.toml ]; then
		cargo test --release
	else
		make -j"$(nproc)" VERBOSE=1 check
	fi
fi

if [ -e Cargo.toml ]; then
	PKG="$(cargo metadata --no-deps --format-version 1 | jq -r '.packages[0].name')"
	VMODDIR="$(pkg-config  --variable=vmoddir varnishapi)"
	cp target/release/lib$PKG.so "$VMODDIR"
else
	make -j"$(nproc)" VERBOSE=1 install
fi

rm -rf /tmp/module_to_build