src/microfuchsia/testing/linux_test_init.gni

# Copyright 2025 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

_linux_toolchain = "//build/toolchain:linux_${current_cpu}"

# Creates a Linux "init" program, intending as the first userspace program
# launched (A.K.A, PID 1), leveraged as a dependency of a
# linux_test_initramfs() target
#
# See executable() for parameters.
template("linux_test_init") {
  if (toolchain_variant.base == _linux_toolchain) {
    executable(target_name) {
      testonly = true
      forward_variables_from(invoker, "*", [ "testonly" ])

      if (!defined(output_name)) {
        output_name = target_name
      }
      output_path = "$root_out_dir/$output_name"
      if (defined(output_extension)) {
        output_path += ".${output_extension}"
      }

      # There isn't too much value derived from instrumenting the init program:
      # pragmatically, we suppress the variants that don't 'just work'.
      exclude_toolchain_tags = [ "asan" ]

      metadata = {
        distribution_entries_barrier = []
        distribution_entries = [
          {
            source = rebase_path(output_path, root_build_dir)
            destination = "init"  # Destination of /init means auto-executed
            label = get_label_info(":$target_name", "label_with_toolchain")
          },
        ]
      }
    }
  } else {
    group(target_name) {
      testonly = true
      forward_variables_from(invoker, [ "visibility" ])
      deps = [ ":$target_name($_linux_toolchain)" ]
    }
    not_needed(invoker, "*", [ "visibility" ])
  }
}