main.cpp had grown to ~910 lines holding CLI parsing, every command
implementation, and the -t/--test handler all in one file. Split it:
- cli_args.{h,cpp}: getopt_long parsing and all post-loop validation
(parse_args()), producing a ParsedArgs the rest of the program consumes.
- commands.{h,cpp}: every command implementation plus dispatch_command(),
an exhaustive switch over Mode with no default -- so -Wswitch (this
project's warning_level=3) now catches a future Mode value added without
a matching dispatch case, instead of silently falling through. Confirmed
by temporarily adding an unhandled enumerator and observing the warning.
- self_test.{h,cpp}: -t/--test's own file, ahead of real tests landing here.
Also fixes Mode::mount, which previously had no explicit dispatch check at
all -- it ran only because it was whatever fell off the end of main()'s
if/else chain when nothing else matched. It's now mount_command(), a real
case in dispatch_command() like every other mode.
main.cpp itself shrinks to ~30 lines: load config, apply its log level,
parse_args(), dispatch_command().
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Gv3s5jckJKzh6JkMoi2Akz
