big changes: themed up, sorted up, some fixes and libs

src/sh/sort.sh

@@ -0,0 +1,44 @@
+# Sort methods for generated lists
+
+if [ ! "${SORT_LOADED:-}" ]; then
+  # Sort specifications
+  #
+  # - No sort
+  # - Alphabetic sort
+  # - Numeric sort
+  SORT_NO="no-sort"
+  SORT_ALPHA="sort-alpha"
+  SORT_NUMERIC="sort-numeric"
+
+  # Artists may be sorted according to the name or the sort-name taken from
+  # MusicBrainz
+  SORT_ARTIST="sort-artist"
+  SORT_ARTIST_SORTNAME="sort-artist-sortname"
+
+  # Release-groups may be sorted according to the release year or the title
+  SORT_RG_TITLE="sort-rg-title"
+  SORT_RG_YEAR="sort-rg-year"
+  export SORT_NO SORT_ALPHA SORT_NUMERIC SORT_ARTIST SORT_ARTIST_SORTNAME \
+    SORT_RG_TITLE SORT_RG_YEAR
+
+  # Configurable default sort
+  SORT_ARTIST_DEFAULT="${SORT_ARTIST_DEFAULT:-"$SORT_ARTIST"}"
+  SORT_RG_DEFAULT="${SORT_RG_DEFAULT:-"$SORT_RG_YEAR"}"
+  export SORT_ARTIST_DEFAULT SORT_RG_DEFAULT
+
+  export SORT_LOADED=1
+fi
+
+# Sorting switches
+#
+# @argument $1: Sort specification (may be one of SORT_NO, SORT_ALPHA,
+#               SORT_NUMERIC)
+#
+# This method sorts the stream read from stdin.
+sort_list() {
+  case "${1:-}" in
+  "$SORT_ALPHA") cat | sort -t "$(printf '\t')" -k 2,2 ;;
+  "$SORT_NUMERIC") cat | sort -t "$(printf '\t')" -k 2,2 -n ;;
+  *) cat ;;
+  esac
+}