$ merki --help
NAME:
   merki - Command line personal health tracker

USAGE:
   merki [global options] command [command options] [arguments...]

VERSION:
   0.0.9

COMMANDS:
   add, a             Add measurement value to the file
   sparkline, spark   Draw sparkline graph for a measure
   asciigraph, graph  Draw ascii graph for a measure
   measurements, m    Return list of all used measurements
   filter, f          Filter records for single measurement
   interval, i        Shows the interval between two measurement events
   latest, l          Show the latest values for all measurements
   help, h            Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --file value, -f value  Log file path (default: "health.log") [$MERKI_FILE]
   --help, -h              show help (default: false)
   --version, -v           print the version (default: false)