xbps-src: new targets: update-bulk and update-sys.

* update-bulk:
	This rebuilds all pkgs in system repositories that are outdated.
	with this xbps-bulk is now considered fully obsolete.

* update-sys:
	This rebuilds all pkgs in system that are oudated and once built,
	updates them via xbps-install(8).

	This target defines a new configuration option "XBPS_SUCMD" that
	is the command to execute to update the system. By default set to
	"sudo sh -c".

CAVEATS
	- need to check if binpkg is in local repo.
	- need to add support to specify alternative rootdir.
	- need to add support to specify system repos.

xbps-src

@@ -79,11 +79,17 @@ Targets: (only one may be specified)
    Prints the value of <var> if it's defined in xbps-src.
 
  show-repo-updates
-   Prints the list of outdated packages in repositories.
+   Prints the list of outdated packages in XBPS repositories.
 
  show-sys-updates
    Prints the list of oudated packages in your system.
 
+ update-bulk
+   Rebuilds all packages in the system repositories that are outdated.
+
+ update-sys
+   Rebuilds all packages in your system that are outdated and updates them.
+
  zap
    Removes a masterdir but preserving ccache, distcc and host directories.
 
@@ -479,53 +485,6 @@ check_build_requirements
 
 trap 'exit_func' INT TERM HUP
 
-bulk_getlink() {
-    local p="$(basename $1)"
-    local target="$(readlink $XBPS_SRCPKGDIR/$p)"
-
-    if [ $? -eq 0 -a -n "$target" ]; then
-        p=$target
-    fi
-    echo $p
-}
-
-bulk_build() {
-    local args="$1" pkg= pkgs= _pkgs= _realdep= _deps= found= x= result=
-
-    if ! command -v xbps-checkvers &>/dev/null; then
-        msg_error "xbps-src: cannot find xbps-{repo,}checkvers command!\n"
-    fi
-    _pkgs=$(xbps-checkvers ${args} -d $XBPS_DISTDIR | awk '{print $2}')
-    # Only add to the list real pkgs, not subpkgs.
-    for pkg in ${_pkgs}; do
-        _realdep=$(bulk_getlink $pkg)
-        unset found
-        for x in ${pkgs}; do
-            if [ "$x" = "${_realdep}" ]; then
-                found=1
-                break
-            fi
-        done
-        if [ -z "$found" ]; then
-            pkgs="$pkgs ${_realdep}"
-        fi
-    done
-    for pkg in ${pkgs}; do
-        unset found
-        setup_pkg $pkg $XBPS_CROSS_BUILD
-        _deps="$(show_pkg_build_deps | sed -e 's|[<>].*\$||g')"
-        _realdep=$(bulk_getlink $pkg)
-        for x in ${_deps}; do
-            if [ "${_realdep}" = "${pkg}" ]; then
-                found=1
-                break
-            fi
-        done
-        [ -n $found ] && result="${_realdep} ${result}"
-    done
-    echo "$result"
-}
-
 #
 # Main switch.
 #
@@ -625,6 +584,12 @@ show-repo-updates)
 show-sys-updates)
     bulk_build -i
     ;;
+update-bulk)
+    bulk_update
+    ;;
+update-sys)
+    bulk_update -i
+    ;;
 zap)
 	masterdir_zap
 	;;