#!/bin/bash

# This script will update the installation of dependency-check to the latest version

# Any error will immediately exit the script with an error code
set -e

# Define directories 
dependency_checker_dir="/srv/jenkins/tools/org.jenkinsci.plugins.DependencyCheck.tools.DependencyCheckInstallation/"
dependency_checker_latest="${dependency_checker_dir}dependency-check_latest/"
dependency_checker_download="${dependency_checker_dir}download/"

# Get currently installed version
current_version=$(cat "${dependency_checker_latest}currentVersion.txt")

# Get latest version
latest_version=$(curl -s https://api.github.com/repos/jeremylong/DependencyCheck/releases/latest | grep -oP '"tag_name": "v\K(.*)(?=")')

echo "Current version of dependency checker: $current_version"
echo "Latest version of dependency checker: $latest_version"

# TODO: Maybe use numeric comparison?
if [[ "$current_version" != "$latest_version" ]]; then
echo "Current version and latest version do not match. Attempting to update the version."

# Clear download folder
rm -r ${dependency_checker_download}*

# Download the latest version
wget --no-verbose -P $dependency_checker_download "https://github.com/jeremylong/DependencyCheck/releases/download/v$latest_version/dependency-check-$latest_version-release.zip"

# Unzip the downloaded file
unzip -q -o "${dependency_checker_download}dependency-check-$latest_version-release.zip" -d "${dependency_checker_download}"        

# Delete old version
rm -rf ${dependency_checker_latest}*

# Move files
mv ${dependency_checker_download}dependency-check/* ${dependency_checker_latest}        

# Save current version
echo "$latest_version" > ${dependency_checker_latest}currentVersion.txt

echo "Dependency Check updated successfully."

else

echo "Dependency Check is already up to date."

fi