Update CNB tools

scripts/package-shim

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+cd "$(dirname "${BASH_SOURCE[0]}")/.."
+./scripts/install_tools.sh
+
+PACKAGE_DIR=${PACKAGE_DIR:-"${PWD##*/}_$(openssl rand -hex 4)"}
+
+full_path=$(realpath "$PACKAGE_DIR")
+args=".bin/packager -uncached"
+
+while getopts "acv:" arg
+do
+    case $arg in
+    a) archive=true;;
+    c) cached=true;;
+    v) version="${OPTARG}";;
+    esac
+done
+
+if [[ ! -z "$cached" ]]; then #package as cached
+    full_path="$full_path-cached"
+    args=".bin/packager"
+fi
+
+if [[ ! -z "$archive" ]]; then #package as archive
+    args="${args} -archive"
+fi
+
+if [[ -z "$version" ]]; then #version not provided, use latest git tag
+    git_tag=$(git describe --abbrev=0 --tags)
+    version=${git_tag:1}
+fi
+
+args="${args} -version ${version}"
+
+eval "${args}" "${full_path}"
+
+if [[ -n "$BP_REWRITE_HOST" ]]; then
+    sed -i '' -e "s|^uri = \"https:\/\/buildpacks\.cloudfoundry\.org\(.*\)\"$|uri = \"http://$BP_REWRITE_HOST\1\"|g" "$full_path/buildpack.toml"
+fi
+