The install/remove manifest logic in main is currently duplicated. This
bloats up main and creates unnecessarily large indented logic. The only
thing that is different between the two large if blocks is a single
function call.
Refactoring to test for which function to call at the latest possible
stage reduces code duplication.
The command line argument parsing is done in a giant for loop in the
main function. This presents readability and extension problems.
Refactor the big for loop into smaller loops inside the function.
In theory this will affect performance slightly at startup, but when considering
the very low amount of possible command line arguments (5, currently) and the low
amount of arguments being passed on a typical launch (0 or 1, mostly),
the readability improvements are very much worth it.
The string literals have also been moved to the "argument" namespace as
constexpr, in order to avoid potential typos in string literals.
Should the amount of command line arguments increase severely, it might
be necessary to create a structure with only one pass through the
argument loop, but such a situation is very unlikely.
Vasily