refactor: [PPT-2388] remove stale temp folder(s) on startup

src/app.cr

@@ -16,14 +16,14 @@
   parser.banner = "Usage: #{PlaceOS::FrontendLoader::APP_NAME} [arguments]"
 
   # Application flags
   parser.on("--www=CONTENT_DIR", "Specifies the content directory") { |d| content_directory = d }
   parser.on("--update-crontab=CRON", "Specifies the update crontab") { |c| update_crontab = c }
   parser.on("--git-username=USERNAME", "Specifies the git username") { |u| git_username = u }
   parser.on("--git-password=PASSWORD", "Specifies the git password") { |p| git_password = p }
 
   # Server flags
   parser.on("-b HOST", "--bind=HOST", "Specifies the server host") { |h| host = h }
   parser.on("-p PORT", "--port=PORT", "Specifies the server port") { |p| port = p.to_i }
   parser.on("-r", "--routes", "List the application routes") do
     ActionController::Server.print_routes
     exit 0
@@ -71,6 +71,15 @@
 
 require "./config"
 
+# Clean up any leftover temp folders from previous runs
+www_dir = File.expand_path(PlaceOS::FrontendLoader::WWW)
+temp_dirs = Dir.children(www_dir)
+  .select { |child| File.directory?(Path[www_dir, child]) }
+  .select(&.matches?(/^.+_temp_\d+$/))
+  .map { |dir| Path[www_dir, dir] }
+temp_dirs.each { |dir| Log.info { "removing stale temp folder: #{Path[dir].basename}" } }
+FileUtils.rm_rf(temp_dirs) unless temp_dirs.empty?
+
 # Configure the database connection. First check if PG_DATABASE_URL environment variable
 # is set. If not, assume database configuration are set via individual environment variables
 if pg_url = ENV["PG_DATABASE_URL"]?
@@ -82,8 +91,8 @@
 # Configure the loader
 
 PlaceOS::FrontendLoader::Loader.configure do |settings|
   content_directory.try { |cd| settings.content_directory = cd }
   update_crontab.try { |uc| settings.update_crontab = uc }
 end
 
 # Server Configuration