kiss: added kiss-reset to contrib

contrib/kiss-reset

@@ -0,0 +1,23 @@
+#!/bin/sh -ef
+#
+# Disable word-splittng warnings as they're safe here.
+# shellcheck disable=SC2046
+#
+# kiss-reset: Remove all packages except for the base.
+
+set -- \
+    $(kiss l | while read -r pkg _; do
+        case $pkg in
+            baselayout|binutils|bison|busybox|bzip2|curl|flex|gcc|git|\
+            gzip|kiss|libelf|libressl|linux-headers|m4|make|mandoc|musl|\
+            perl|pkgconf|rsync|xz|zlib) ;;
+
+            *) printf '%s\n' "$pkg" ;;
+        esac
+    done)
+
+[ "$1" ] && {
+    printf 'WARNING: This will remove \033[1m%s\033[m package(s).\n' "$#"
+    printf 'Continue? [Enter/Ctrl+C]\n'
+    read -r _ && KISS_FORCE=1 kiss r "$@"
+}