-h, --help                output usage information
    -V, --version             output the version number
    -q, --query <query>       search query (required)
    -o, --outdir <path>       output directory (required - will be created if not found)
    --api <name>              API to search [eupmc, crossref, ieee, arxiv] (default: eupmc)
    -x, --xml                 download fulltext XMLs if available
    -p, --pdf                 download fulltext PDFs if available
    -s, --supp                download supplementary files if available
    -t, --minedterms          download text-mined terms if available
    -l, --loglevel <level>    amount of information to log (silent, verbose, info*, data, warn, error, or debug)
    -a, --all                 search all papers, not just open access
    -n, --noexecute           report how many results match the query, but don't actually download anything
    -f, --logfile <filename>  save log to specified file in output directory as well as printing to terminal
    -k, --limit <int>         limit the number of hits and downloads
    --filter <filter object>  filter by key value pair, passed straight to the crossref api only
    -r, --restart             restart file downloads after failure