--generate
generate file database
--variables
show configuration variables
--configurations
show configuration order
--expand-braces
expand complex variable
--expand-path
expand variable (resolve paths)
--expand-var
expand variable (resolve references)
--show-path
show path expansion of ...
--var-value
report value of variable
--find-file
report file location
--find-path
report path of file
--make [or --ini] make luatex format
--run [or --fmt] run luatex format
--compile
assemble and compile lua inifile
--verbose
give a bit more info
--all show all found files
--format=str
filter cf format specification (default 'tex', use 'any' for any match)
--pattern=str
filter variables
--trackers=list
enable given trackers