tuna: Update command-line interface

The current command-line interface allows for chaining of multiple
actions, which results in ambiguous user input, a need for maintaining
variable states (thread-list, cpu-list, etc.) in the program, and a need
to type check input after parsing. The help menu can also be

Allow for the use of argparse rather than getopt to significantly
simplify the program.
Provide subcommands and clearer usage menus for the user,
introduce type checking at the parser level, and remove
ambiguity for user input.

Signed-off-by: Leah Leshchinsky <lleshchi@redhat.com>
Signed-off-by: John Kacur <jkacur@redhat.com>
2 files changed