`exec_into_args` would just read argv and exec into it, but we want to
be able to write commands which take some positional arguments first.
Thus we split the invocation into `args_for_exec`, which returns the
positional arguments and prog, and then pass prog to `exec_into_args`
when we want to exec eventually (prog is still an iterator at this
point).
Change-Id: I0b180c1a100b96363fe33ba2c42034ed41716b7a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2474
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
Most tools end by execing into their argv, so here’s a small rust
function which does the boilerplate.
Change-Id: I9748955cf53828e02f04d7e8d74fbaf10c1158b5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2453
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>