abuild: dont run 'build' from rootpkg

we want be able to run build and rootpkg separately. so you can stop
in the process, fix things, and then continue with 'abuild rootpkg' to
generate the package manually.

abuild.in

@@ -143,6 +143,7 @@ default_sanitycheck() {
 	if [ $(echo "$pkgdesc" | wc -c) -gt 128 ]; then
 		die "pkgdesc is too long"
 	fi
+	is_function package || warning "Missing package() function in APKBUILD"
 
 	if [ -n "$replaces_priority" ] \
 		&& ! echo $replaces_priority | egrep -q '^[0-9]+$'; then
@@ -1196,11 +1197,16 @@ mklinks_abuildrepo() {
 }
 
 build_abuildrepo() {
-	local d apk
+	local d apk _build=build
+	if ! is_function package; then
+		# if package() is missing then build is called from rootpkg
+		_build=true
+	fi
 	if ! apk_up2date || [ -n "$force" ]; then
 		logcmd "building $pkgname"
 		sanitycheck && builddeps && clean && fetch && unpack \
-			&& post_unpack && prepare && mkusers && rootpkg \
+			&& post_unpack && prepare && mkusers && $_build \
+			&& rootpkg \
 			|| return 1
 	fi
 	update_abuildrepo_index
@@ -1324,15 +1330,17 @@ do_fakeroot() {
 
 # build and package in fakeroot
 rootpkg() {
-	local do_build=build
-	cd "$startdir"
-	if is_function package; then
-		build || return 1
-		do_build=package
+	local _package=package
+	if ! is_function package; then
+		# if package() is missing then run 'build' in fakeroot instead
+		warning "No package() function in APKBUILD"
+		_package=build
 	fi
 	cd "$startdir"
+	rm -rf "$pkgdir"
 	[ -n "$FAKEROOT" ] && msg "Entering fakeroot..."
-	do_fakeroot "$abuild_path" $color_opt $do_build \
+	do_fakeroot "$abuild_path" $color_opt \
+		$_package \
 		prepare_subpackages \
 		prepare_language_packs \
 		prepare_package \
@@ -1814,7 +1822,7 @@ usage() {
 	echo "  build       Compile and install package into \$pkgdir"
 	echo "  listpkg     List target packages"
 	echo "  package     Create package in \$PKGDEST"
-	echo "  rootpkg     Run '$0 build package' as fakeroot"
+	echo "  rootpkg     Run 'package', the split functions and create apks as fakeroot"
 	echo "  clean       Remove temp build and install dirs"
 	echo "  cleanoldpkg Remove binary packages except current version"
 	echo "  cleanpkg    Remove already built binary and source package"