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#!/usr/bin/env perl
# Example: a custom NVIDIA driver setup class dropped into the project.
#
# Layout:
#   eg/custom-setup/Rexfile
#   eg/custom-setup/lib/My/GPU/Setup.pm   <- the class; Rex puts lib/ on @INC
#   eg/custom-setup/lib/My/GPU/DebianMirror.pm  <- Debian: a mirror of your own
#
# Usage (Ubuntu hosts -- My::GPU::Setup extends the Ubuntu setup):
#   rex -f eg/custom-setup/Rexfile -H <host> setup
#   rex -f eg/custom-setup/Rexfile -H <host> setup_mirror --apt_line='deb [...] http://... noble main restricted'
#   rex -f eg/custom-setup/Rexfile -H <debian-host> setup_debian_mirror
#
# Two ways to choose the class, the first wins:
#   1. gpu_setup(setup => 'My::GPU::Setup') or setup => My::GPU::Setup->new(...)
#   2. set gpu_nvidia_setup => 'My::GPU::Setup' -- below. It also reaches
#      Rex::Rancher's gpu => 1, which calls gpu_setup without a setup option.
# With neither, Rex::GPU picks its own class by OS.
#
# Testing the WORKING TREE: see eg/Rexfile -- prepend PERL5LIB=$PWD/lib.
use Rex -feature => ['1.4'];
use Rex::LibSSH;
use Rex::GPU;

my $key  = $ENV{REX_KEY}  || "$ENV{HOME}/.ssh/id_ed25519";
my $user = $ENV{REX_USER} || 'root';

set connection  => 'LibSSH';
set user        => $user;
set private_key => $key;
set public_key  => "$key.pub";
set auth        => 'key';

# Every gpu_setup / install_driver in this Rexfile uses the project's class.
set gpu_nvidia_setup => 'My::GPU::Setup';

desc 'GPU setup with My::GPU::Setup (chosen by set gpu_nvidia_setup)';
task 'setup', sub {
  my ($params) = @_;
  gpu_setup(
    containerd_config => ($params->{runtime} // 'rke2'),
    reboot            => ($params->{reboot}  // 0),
  );
};

desc 'GPU setup with a configured My::GPU::Setup object and a tighter requirement';
task 'setup_mirror', sub {
  my ($params) = @_;
  die "apt_line= required\n" unless $params->{apt_line};
  gpu_setup(
    containerd_config => ($params->{runtime} // 'rke2'),
    reboot            => ($params->{reboot}  // 0),
    # an object wins over set gpu_nvidia_setup; it gets the detected GPUs
    setup             => My::GPU::Setup->new(apt_line => $params->{apt_line}),
    # intersected with what the GPUs need: can only tighten
    requirement       => { min_branch => 580 },
  );
};

desc 'GPU setup on a Debian host whose sources point at a mirror of your own';
task 'setup_debian_mirror', sub {
  my ($params) = @_;
  gpu_setup(
    containerd_config => ($params->{runtime} // 'rke2'),
    reboot            => ($params->{reboot}  // 0),
    # a class name wins over set gpu_nvidia_setup
    setup             => 'My::GPU::DebianMirror',
  );
};

1;