_ARGS
The _ARGS global variable stores any arguments to the current action. As an example, if this command line was used to launch Premake:
$ premake5 vs2012 alpha beta
...then _ARGS[1] will be set to "alpha" and _ARGS[2] to "beta". If there are no arguments this array will be empty.
Availability
Premake 4.0 or later.