Remote places

With labgrid-client, you can reserve and acquire a remote place before interacting with it:

$ eval `labgrid-client reserve --shell --wait device=odroid-2n-plus`
$ labgrid-client -p + acquire
$ labgrid-client -p + ssh echo "Hello, world!"
$ labgrid-client -p + release

The equivalent in rules_labgrid should be:

platform(
	name = "odroid-2n-plus",
	constraint_values = [
		"//constraint/device:odroid-2n-plus",
	],
)

labgrid_genrule(
	name = "hello",
	srcs = ["@ape//ape:echo"],
	outs = ["stdout.log"],
	cmd = "$(location @rules_labgrid//labgrid/run) $(location @ape//ape:echo) \"Hello, world!\" > $@",
	platform = ":odroid-2n-plus",
	tools = ["@rules_labgrid//labgrid/run"],
)

Reservation and acquisition would happen implicitly as part of the toolchain definition:

labgrid_config_toolchain(
	name = "odroid-2n-plus",
	src = "config.yaml",
    managers = [
        "@rules_labgrid//labgrid/manager:reserve",
        "@rules_labgrid//labgrid/manager:acquire",
    ],
	target_compatible_with = [
		"//constraint/device:odroid-2n-plus",
	],
	# ...

The managers @rules_labgrid//labgrid/manager:{reserve,acquire} would be implemented to match the behaviour of their respective labgrid-client subcommands. The tags used in the reserve command could be inferred from the toolchain's target constraints or set explicitly as a tags attribute in labgrid_config_toolchain.