build-package.sh: better support for metapackages

scripts/build/configure/termux_step_configure.sh

@@ -1,4 +1,6 @@
 termux_step_configure() {
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+
 	if [ "$TERMUX_PKG_FORCE_CMAKE" = "false" ] && [ -f "$TERMUX_PKG_SRCDIR/configure" ]; then
 		termux_step_configure_autotools
 	elif [ -f "$TERMUX_PKG_SRCDIR/CMakeLists.txt" ]; then

scripts/build/termux_step_create_datatar.sh

@@ -8,7 +8,7 @@ termux_step_create_datatar() {
 		termux_error_exit "Package contains hard links: $HARDLINKS"
 	fi
 
-	if [ "${TERMUX_PKG_METAPACKAGE-false}" = "true" ]; then
+	if [ "$TERMUX_PKG_METAPACKAGE" = "true" ]; then
 		# Metapackage doesn't have data inside.
 		rm -rf data
 	else

scripts/build/termux_step_extract_package.sh

@@ -1,5 +1,5 @@
 termux_step_extract_package() {
-	if [ -z "${TERMUX_PKG_SRCURL:=""}" ] || [ "${TERMUX_PKG_SKIP_SRC_EXTRACT-false}" = "true" ]; then
+	if [ -z "${TERMUX_PKG_SRCURL:=""}" ] || [ "${TERMUX_PKG_SKIP_SRC_EXTRACT-false}" = "true" ] || [ "$TERMUX_PKG_METAPACKAGE" = "true" ]; then
 		mkdir -p "$TERMUX_PKG_SRCDIR"
 		return
 	fi

scripts/build/termux_step_handle_hostbuild.sh

@@ -1,5 +1,6 @@
 termux_step_handle_hostbuild() {
-	if [ "$TERMUX_PKG_HOSTBUILD" = "false" ]; then return; fi
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+	[ "$TERMUX_PKG_HOSTBUILD" = "false" ] && return
 
 	cd "$TERMUX_PKG_SRCDIR"
 	for patch in $TERMUX_PKG_BUILDER_DIR/*.patch.beforehostbuild; do

scripts/build/termux_step_install_license.sh

@@ -1,4 +1,6 @@
 termux_step_install_license() {
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+
 	mkdir -p "$TERMUX_PREFIX/share/doc/$TERMUX_PKG_NAME"
 
 	if [ ! "${TERMUX_PKG_LICENSE_FILE}" = "" ]; then

scripts/build/termux_step_make.sh

@@ -1,4 +1,6 @@
 termux_step_make() {
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+
 	local QUIET_BUILD=
 	if [ "$TERMUX_QUIET_BUILD" = true ]; then
 		QUIET_BUILD="-s"

scripts/build/termux_step_make_install.sh

@@ -1,4 +1,6 @@
 termux_step_make_install() {
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+
 	if test -f build.ninja; then
 		ninja -w dupbuild=warn -j $TERMUX_MAKE_PROCESSES install
 	elif ls ./*akefile &> /dev/null || [ -n "$TERMUX_PKG_EXTRA_MAKE_ARGS" ]; then

scripts/build/termux_step_massage.sh

@@ -1,4 +1,6 @@
 termux_step_massage() {
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+
 	cd "$TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX"
 
 	# Remove lib/charset.alias which is installed by gettext-using packages:

scripts/build/termux_step_patch_package.sh

@@ -1,4 +1,6 @@
 termux_step_patch_package() {
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+
 	cd "$TERMUX_PKG_SRCDIR"
 	local DEBUG_PATCHES=""
 	if [ "$TERMUX_DEBUG" = "true" ]; then

scripts/build/termux_step_replace_guess_scripts.sh

@@ -1,4 +1,6 @@
 termux_step_replace_guess_scripts() {
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+
 	cd "$TERMUX_PKG_SRCDIR"
 	find . -name config.sub -exec chmod u+w '{}' \; -exec cp "$TERMUX_SCRIPTDIR/scripts/config.sub" '{}' \;
 	find . -name config.guess -exec chmod u+w '{}' \; -exec cp "$TERMUX_SCRIPTDIR/scripts/config.guess" '{}' \;

scripts/build/termux_step_setup_toolchain.sh

@@ -1,4 +1,6 @@
 termux_step_setup_toolchain() {
+	[ "$TERMUX_PKG_METAPACKAGE" = "true" ] && return
+
 	export CFLAGS=""
 	export LDFLAGS="-L${TERMUX_PREFIX}/lib"
 

scripts/build/termux_step_setup_variables.sh

@@ -131,6 +131,7 @@ termux_step_setup_variables() {
 	TERMUX_PKG_FORCE_CMAKE=false # if the package has autotools as well as cmake, then set this to prefer cmake
 	TERMUX_CMAKE_BUILD=Ninja # Which cmake generator to use
 	TERMUX_PKG_HAS_DEBUG=true # set to false if debug build doesn't exist or doesn't work, for example for python based packages
+	TERMUX_PKG_METAPACKAGE=false
 
 	unset CFLAGS CPPFLAGS LDFLAGS CXXFLAGS
 }

scripts/build/termux_step_start_build.sh

@@ -2,6 +2,12 @@ termux_step_start_build() {
 	# shellcheck source=/dev/null
 	source "$TERMUX_PKG_BUILDER_SCRIPT"
 
+	if [ "$TERMUX_PKG_METAPACKAGE" = "true" ]; then
+		# Metapackage has no sources and therefore platform-independent.
+		TERMUX_PKG_SKIP_SRC_EXTRACT=true
+		TERMUX_PKG_PLATFORM_INDEPENDENT=true
+	fi
+
 	TERMUX_STANDALONE_TOOLCHAIN="$TERMUX_COMMON_CACHEDIR/android-r${TERMUX_NDK_VERSION}-api-${TERMUX_PKG_API_LEVEL}"
 	# Bump the below version if a change is made in toolchain setup to ensure
 	# that everyone gets an updated toolchain:
@@ -41,7 +47,7 @@ termux_step_start_build() {
 		fi
 	fi
 
-	if [ "$TERMUX_SKIP_DEPCHECK" = false ] && [ "$TERMUX_INSTALL_DEPS" = true ]; then
+	if [ "$TERMUX_SKIP_DEPCHECK" = false ] && [ "$TERMUX_INSTALL_DEPS" = true ] && [ "$TERMUX_PKG_METAPACKAGE" = "false" ]; then
 		# Download repo files
 		termux_get_repo_files
 
@@ -87,7 +93,7 @@ termux_step_start_build() {
 			mkdir -p $TERMUX_BUILT_PACKAGES_DIRECTORY
 			echo "$DEP_VERSION" > "$TERMUX_BUILT_PACKAGES_DIRECTORY/$PKG"
 		done<<<$(./scripts/buildorder.py -i "$TERMUX_PKG_BUILDER_DIR" $TERMUX_PACKAGES_DIRECTORIES || echo "ERROR")
-	elif [ "$TERMUX_SKIP_DEPCHECK" = false ] && [ "$TERMUX_INSTALL_DEPS" = false ]; then
+	elif [ "$TERMUX_SKIP_DEPCHECK" = false ] && [ "$TERMUX_INSTALL_DEPS" = false ] && [ "$TERMUX_PKG_METAPACKAGE" = "false" ]; then
 		# Build dependencies
 		while read PKG PKG_DIR; do
 			if [ -z $PKG ]; then