#!/bin/bash

LIBVIRT_STPM_GRP="libvirt-tpm"

module_init() {
	groupadd --system "${LIBVIRT_STPM_GRP}"
}

fetch_source() {
	autoclone
}

build() {
	local SRCDIR_LIB="${MODULE_WORK_DIR}/src/libtpms"
	local SRCDIR_BIN="${MODULE_WORK_DIR}/src/swtpm"
	local DSTDIR="${MODULE_BUILD_DIR}"

	cde "${SRCDIR_LIB}"

	autoreconf --install --force

	./configure \
		--prefix="/usr" \
		--with-openssl \
		--with-tpm2 || perror "'configure' failed."
	make || perror "'make' failed."
	DESTDIR="${DSTDIR}" make install || perror "'make install' failed."

	cde "${SRCDIR_BIN}"

	# save original path content before modifying path variable
	local PATH_OLD="${PATH}"

	# set config paths for additional pkg-config files
	export PKG_CONFIG_PATH="${DSTDIR}/usr/lib/pkgconfig"
	# set system root directory for prebuilt headers and libraries, e.g. libvirt-glib
	export PKG_CONFIG_SYSROOT_DIR="${DSTDIR}"
	# enable output of all system include directories
	export PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1
	# enable output of all system library directories
	export PKG_CONFIG_ALLOW_SYSTEM_LIBS=1

	# create custom pkg-config program to patch paths from pkg-build config files in our build directory
	cat > "${SRCDIR_BIN}/pkg-config" <<-EOF
		#!/bin/bash

		# unset custom path to avoid call recursion of this custom pkg-config script
		unset PATH

		# call patched pkg-config wrapper from mltk bin directory
		exec "${ROOT_DIR}/core/bin/pkg-config.sh" "\${@}"
	EOF
	chmod +x "${SRCDIR_BIN}/pkg-config"

	# Remove usage of /usr/bin/env to avoid PATH manipulation attacks
	sed -i 's/env //' samples/swtpm-create-tpmca samples/swtpm-create-user-config-files.in

	PATH="${SRCDIR}:${PATH}" \
	autoreconf --install --force

	# overwrite search path to inject custom pkg-config program
	PATH="${SRCDIR}:${PATH}" \
	./configure \
		--prefix="/usr" \
		--with-cuse \
		--with-gnutls \
		--with-seccomp || perror "'configure' failed."
	make || perror "'make' failed."
	DESTDIR="${DSTDIR}" make install || perror "'make install' failed."

	# change group and permissions for libvirt-tpm members
	chgrp "${LIBVIRT_STPM_GRP}" "${DSTDIR}/var/lib/swtpm-localca"
	chmod 775 "${DSTDIR}/var/lib/swtpm-localca"

	rm "${SRCDIR_BIN}/pkg-config"

	# restore old environment so that following pkg-config calls are not modified
	unset PKG_CONFIG_PATH
	unset PKG_CONFIG_SYSROOT_DIR
	unset PKG_CONFIG_ALLOW_SYSTEM_CFLAGS
	unset PKG_CONFIG_ALLOW_SYSTEM_LIBS

	# restore original path variable
	export PATH="${PATH_OLD}"
}

post_copy() {
	:
}