Documentation: lib.sh: Support slot scope in get_main_tree_keyword()

In general, use more portageq instead of sed, grep, ls, sort and tail.

Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

Documentation/maintainers/new/lib.sh

@@ -37,7 +37,8 @@ bump_packages_from_set() {
  ekeyword ^all ${destination} > /dev/null
 
  if [[ ${destination} != *9999* ]] ; then
- ekeyword $(get_main_tree_keyword ${cp}) ${destination} > /dev/null
+ local slot="$(portageq metadata / ebuild ${cp}-${sourceversion} SLOT)"
+ ekeyword $(get_main_tree_keyword ${cp} ${slot%/*}) ${destination} > /dev/null
  ekeyword ~all ${destination} > /dev/null
  fi
 
@@ -145,14 +146,20 @@ create_keywords_files() {
 }
 
 # @FUNCTION: get_main_tree_keyword
-# @USAGE: <cp>
+# @USAGE: <cp> [slot]
 # @DESCRIPTION:
 # Given a <cp>, get the keywords from the highest ebuild version in the gentoo repo.
 get_main_tree_keyword() {
  local portdir="$(portageq get_repo_path / gentoo)"
  local cp="${1}"
+ local slot basever
 
- echo $(sed -ne 's/^\s*KEYWORDS="\(.*\)"/\1/p' "$(ls ${portdir}/${cp}/*.ebuild | sort | tail -n 1)")
+ if [[ -n ${2} ]]; then
+ slot=":${2}"
+ fi
+ slot="${slot}::gentoo"
+ basever="$(portageq best_visible / ${cp}${slot})" # TODO: what if there is no such slot in tree?
+ echo $(portageq metadata / ebuild ${basever} KEYWORDS)
 }
 
 # @FUNCTION: get_package_list_from_set