abuild: replace $0 with $abuild_path, add $forceroot where missing

abuild.in

@@ -760,7 +760,7 @@ prepare_subpackages() {
 		# call abuild recursively, setting subpkg{dir,name}
 		( subpkg_set "$i"; msg "Running split function $subpkgsplit..."; \
 		  subpkgdir="$pkgbasedir/$subpkgname" subpkgname="$subpkgname" subpkgarch="$subpkgarch" \
-		  $0 pre_split $subpkgsplit prepare_package \
+		  "$abuild_path" $forceroot pre_split $subpkgsplit prepare_package \
 			&& postcheck "$pkgbasedir/$subpkgname" "$subpkgname" ) || return 1
 	done
 	postcheck "$pkgdir" "$pkgname" || return 1
@@ -813,7 +813,7 @@ prepare_language_packs() {
 		lang="$lang" \
 		subpkgname="$pkgname-lang-$lang" \
 		subpkgdir="$pkgbasedir"/$subpkgname \
-			$0 lang_subpkg prepare_package || return 1
+			"$abuild_path" $forceroot lang_subpkg prepare_package || return 1
 	done
 }
 
@@ -937,7 +937,7 @@ prepare_metafiles() {
 		subpkgarch="$arch"
 	fi
 
-	echo "# Generated by $(basename $0) $program_version" >"$pkginfo"
+	echo "# Generated by $(basename "$abuild_path") $program_version" >"$pkginfo"
 	if [ -n "$FAKEROOTKEY" ]; then
 		echo "# using $($FAKEROOT -v)" >> "$pkginfo"
 	fi
@@ -1763,7 +1763,7 @@ do_fakeroot() {
 check_fakeroot() {
 	cd "$startdir"
 	[ -n "$FAKEROOT" ] && msg "Entering fakeroot..."
-	do_fakeroot "$abuild_path" $color_opt $keep_build check
+	do_fakeroot "$abuild_path" $forceroot $color_opt $keep_build check
 }
 
 # build and package in fakeroot
@@ -1771,7 +1771,7 @@ rootpkg() {
 	cd "$startdir"
 	rm -rf "$pkgdir"
 	[ -n "$FAKEROOT" ] && msg "Entering fakeroot..."
-	do_fakeroot "$abuild_path" $color_opt $keep_build \
+	do_fakeroot "$abuild_path" $forceroot $color_opt $keep_build \
 		package \
 		prepare_subpackages \
 		prepare_language_packs \
@@ -2090,7 +2090,7 @@ builddeps() {
 		export ABUILD_VISITED="$ABUILD_VISITED $pkg"
 
 		msg "Entering $dir"
-		cd "$dir" && $0 $forceroot $keep $keep_build $quiet \
+		cd "$dir" && "$abuild_path" $forceroot $keep $keep_build $quiet \
 			$install_deps $recursive $upgrade $color_opt \
 			abuildindex || return 1
 	done