Improved package script workflow

* moved variable declarations to the top of the script
* added a `package_version` variable to store the version of the package
* fixed logic to create the package in the correct directory
* cleaned up the exit_trap function to remove the temporary files if
  they exist

bin/package

@@ -1,7 +1,18 @@
 #!/usr/bin/env bash
+# shellcheck disable=SC2317
 
 set -xeuo pipefail
 
+declare git_url git_tag work_dir
+declare -x TAG NODE_VERSION TMP_DIR
+
+git_url="https://github.com/cloudfoundry-community/stratos.git"
+git_tag="${TAG:-develop}"
+work_dir="${PWD}"
+NODE_VERSION="${NODE_VERISON:-20.13.1}"
+NODE_SHA2="${NODE_SHA2:-71ec5c92b35770170dad21ff65130f3e4201e8a0bcd32986e5dcf32b57f379e6}"
+TMP_DIR=/tmp
+
 node::install() {
   local download_file
   download_file="${TMP_DIR}/node${NODE_VERSION}.tar.gz"
@@ -21,15 +32,14 @@ node::install() {
 #  source: https://nodejs.org/dist/v20.13.1/node-v20.13.1.tar.gz
 #  source_sha256: a85ee53aa0a5c2f5ca94fa414cdbceb91eb7d18a77fc498358512c14cc6c6991
 
-    NODE_SHA2="71ec5c92b35770170dad21ff65130f3e4201e8a0bcd32986e5dcf32b57f379e6"
     URL=https://buildpacks.cloudfoundry.org/dependencies/node/node_${NODE_VERSION}_linux_x64_cflinuxfs4_71ec5c92.tgz
 
     echo "-----> Download Nodejs ${NODE_VERSION}"
-    curl -s -L --retry 15 --retry-delay 2 $URL -o ${download_file}
+    curl -s -L --retry 15 --retry-delay 2 "$URL" -o "${download_file}"
 
-    DOWNLOAD_SHA2=$(sha256sum ${download_file} | cut -d ' ' -f 1)
+    DOWNLOAD_SHA2=$(sha256sum "${download_file}" | cut -d ' ' -f 1)
 
-    if [[ ${DOWNLOAD_SHA2} != ${NODE_SHA2} ]]; then
+    if [[ ${DOWNLOAD_SHA2} != "${NODE_SHA2}" ]]; then
       echo "       **ERROR** MD5 mismatch: got $DOWNLOAD_SHA2 expected $NODE_SHA2"
       exit 1
     fi
@@ -46,14 +56,6 @@ node::install() {
   export NODE_HOME="${node_install_dir}"
 }
 
-declare git_url git_tag work_dir
-declare -x TAG NODE_VERSION TMP_DIR
-
-git_url="https://github.com/cloudfoundry-community/stratos.git"
-git_tag="${TAG:-develop}"
-work_dir="${PWD}"
-NODE_VERSION="${NODE_VERISON:-20.13.1}"
-TMP_DIR=/tmp
 
 if [[ -z ${USE_LOCAL:-""} ]] ; then
 
@@ -73,10 +75,10 @@ if [[ -z ${VERSION:-""} ]] ; then
   export stratos_version="${VERSION}"  # Will be tagged on publish in Concourse
 fi
 
-function exit_trap() {
+exit_trap() {
   # See: install_nodejs.sh
-  NODE_VERSION="20.13.1"
-  rm -rf "/tmp/node${NODE_VERSION}.tar.gz" "/tmp/node${NODE_VERSION}"
+  [[ -d "${TMP_DIR}/node${NODE_VERSION}" ]] && rm -rf "${TMP_DIR}/node${NODE_VERSION}"
+  [[ -f "${TMP_DIR}/node${NODE_VERSION}.tar.gz" ]] && rm -rf "${TMP_DIR}/node${NODE_VERSION}.tar.gz"
 }
 trap exit_trap EXIT
 
@@ -117,10 +119,11 @@ echo "web: ./deploy/cloud-foundry/start.sh" > "${build_dir}/Procfile"
 
 ls -lah "${build_dir}"
 cd "${build_dir}"
-if [[ -z ${BUILD_ROOT:-"" } ]] ; then
-  zip -r [email protected] "${BUILD_ROOT}/stratos-ui-packaged.zip" ./*
+package_version="${stratos_version:-"dev-$(date +%Y%m%d%H%M%S)"}"
+if [[ -n ${RELEASE_DIR:-""} ]] ; then
+  zip -r [email protected] "${RELEASE_DIR}/stratos-ui-${package_version}.zip" ./*
 else
-  zip -r [email protected] "${work_dir}/stratos-ui-packaged.zip" ./*
+  zip -r [email protected] "${work_dir}/stratos-ui-${package_version}.zip" ./*
 fi
 cd "${work_dir}"