makepkg: remove support for PKGBUILDs without a package() function

Not having a package() function means all building occurs as root
and repackaging can lose permissions.  Given the use of package()
functions has been around for years and we deprecated not having
one in pacman-4.1, we can remove support for PKGBUILDs without
package() functions altogether. However, keep PKGBUILDs that have
neither a build() or package() function working.

Signed-off-by: Allan McRae <allan@archlinux.org>

scripts/makepkg.sh.in

@@ -2240,7 +2240,12 @@ check_sanity() {
 		ret=1
 	fi
 
-	if (( ${#pkgname[@]} > 1 )); then
+	if (( ${#pkgname[@]} == 1 )); then
+		if have_function build && ! ( have_function package || have_function package_${pkgname}); then
+			error "$(gettext "Missing %s function in %s")" "package()" "$BUILDFILE"
+			ret=1
+		fi
+	else
 		for i in ${pkgname[@]}; do
 			if ! have_function package_${i}; then
 				error "$(gettext "Missing %s function for split package '%s'")" "package_$i()" "$i"
@@ -2873,17 +2878,7 @@ if (( INFAKEROOT )); then
 	if (( ! SPLITPKG )); then
 		pkgdir="$pkgdirbase/$pkgname"
 		mkdir "$pkgdir"
-		if (( ! PKGFUNC )); then
+		if (( PKGFUNC )); then
-			if (( ! REPKG )); then
-				if (( BUILDFUNC )); then
-					run_build
-					(( CHECKFUNC )) && run_check
-				fi
-			else
-				warning "$(gettext "Repackaging without the use of a %s function is deprecated.")" "package()"
-				plain "$(gettext "File permissions may not be preserved.")"
-			fi
-		else
 			run_package
 		fi
 		tidy_install
@@ -2900,10 +2895,6 @@ fi
 fullver=$(get_full_version)
 msg "$(gettext "Making package: %s")" "$pkgbase $fullver ($(date))"
 
-if (( !PKGFUNC && !SPLITPKG )); then
-	warning "$(gettext "Using a %s without a %s function is deprecated.")" "$BUILDSCRIPT" "package()"
-fi
-
 # if we are creating a source-only package, go no further
 if (( SOURCEONLY )); then
 	if [[ -f $SRCPKGDEST/${pkgbase}-${fullver}${SRCEXT} ]] \
@@ -2981,14 +2972,7 @@ cd_safe "$srcdir"
 
 if (( NOEXTRACT && ! VERIFYSOURCE )); then
 	warning "$(gettext "Using existing %s tree")" "src/"
-elif (( REPKG )); then
+elif (( !REPKG )); then
-	if (( ! PKGFUNC && ! SPLITPKG )) \
-	     && { [[ ! -d $pkgdirbase ]] || dir_is_empty "$pkgdirbase"; }; then
-		error "$(gettext "The package directory is empty, there is nothing to repackage!")"
-		plain "$(gettext "Aborting...")"
-		exit 1
-	fi
-else
 	download_sources
 	check_source_integrity
 	(( VERIFYSOURCE )) && exit 0 # $E_OK
@@ -3002,8 +2986,8 @@ if (( NOBUILD )); then
 	msg "$(gettext "Sources are ready.")"
 	exit 0 #E_OK
 else
-	# check for existing pkg directory; don't remove if we are repackaging
+	# clean existing pkg directory
-	if [[ -d $pkgdirbase ]] && (( ! REPKG || PKGFUNC || SPLITPKG )); then
+	if [[ -d $pkgdirbase ]]; then
 		msg "$(gettext "Removing existing %s directory...")" "pkg/"
 		rm -rf "$pkgdirbase"
 	fi
@@ -3027,9 +3011,6 @@ else
 			mkdir -p "$pkgdir"
 			if (( PKGFUNC )); then
 				run_package
-			elif (( REPKG )); then
-					warning "$(gettext "Repackaging without the use of a %s function is deprecated.")" "package()"
-					plain "$(gettext "File permissions may not be preserved.")"
 			fi
 			tidy_install
 			create_package
@@ -3038,7 +3019,7 @@ else
 			run_split_packaging
 		fi
 	else
-		if (( ! REPKG && ( PKGFUNC || SPLITPKG ) )); then
+		if (( ! REPKG )); then
 			(( BUILDFUNC )) && run_build
 			(( CHECKFUNC )) && run_check
 			cd_safe "$startdir"