CreateNewFileFromFilename given a file name, this creates a new file on-disk for writing logs.

CreateUniqueFileName creates a new unused filename at the target directory.

DirExistsOrCreate checks if a directory exists, and creates it if it doesn't.

FileExists returns true if the file exists.

IsValidFilePathFormat checks if the given string is formatted like a file path.

NewFileWatcher creates a new fsnotify.Watcher and adds the specified directory to it.

RelocateExistingFileIfExists checks if a file exists, and if it does, renames it to a unique name.

WaitForFile waits for a file event to occur in the watcher.