Signed-off-by: Felix Abecassis <[email protected]>

It gives the opportunity to perform cleanup in the main function.

Any environment variable with the prefix "NVIDIA_REQUIRE_" will have
its value passed to nvidia-container-cli.

NVIDIA_CUDA_VERSION is no longer used and the CUDA images will be
replaced by a NVIDIA_REQUIRE_CUDA variable.

Those checks can be disabled globally in the configuration file or for
each container using NVIDIA_DISABLE_REQUIRE.

Implement "-debug"

Signed-off-by: Christy Norman <[email protected]>
Signed-off-by: Felix Abecassis <[email protected]>

See opencontainers/runc@db093f6
We now let debuild detect and add the dependency for older versions of runc.

Signed-off-by: Christy Norman <[email protected]>
Signed-off-by: Felix Abecassis <[email protected]>

Tools like CRI-O or Red Hat's fork of Docker only need the OCI hook,
not the full runtime.

The hook is also likely to move at a different cadence than the full
runtime, which is tied to the upstream Docker releases.

…alue

Instead of using CRI-O-specific arguments, use the state's REQUIRED
'status' property [1] to ensure we're being called on a created
container (and not a running container or a stopped container).

We could potentially have:

  args := flag.Args()
  if len(args) != 0 {
    flag.Usage()
    os.Exit(2)
  }

but to stay compatible with folks using the hook with older CRI-O
(including the 1.9.x branch), I've just ignored flag.Args() for now.

Also add 'fallthrough' statements [2] to the no-op switch cases, since
that appeared to be the intention.

[1]: https://github.com/opencontainers/runtime-spec/blame/v1.0.1/runtime.md#L16
[2]: https://golang.org/ref/spec#Fallthrough_statements