/**
 * Choose where tests that exercise the native host toolchain run.
 *
 * Darwin and Linux have supported native clang paths, so those files should
 * test the contributor's actual host. Other hosts keep the coverage in the
 * Linux Sandboxes. Darwin alone adds the compact kqueue/Mach-O contracts.
 */
export function sandboxHostSchedule(platform, invariantFiles) {
  const runsNative = platform === "darwin" || platform === "linux";
  return {
    darwinContracts: platform === "darwin",
    localArtifactContracts: runsNative,
    localInvariantFiles: runsNative ? invariantFiles : [],
    remoteArtifactContracts: !runsNative,
    remoteInvariantFiles: runsNative ? [] : invariantFiles,
  };
}

/**
 * Pin lane and scheduler identity even when the parent shell, .env.local, or
 * Sandbox image already defines these variables. Empty values restore the
 * unsharded, platform-native defaults; intentional remote and local shards
 * override them at their call sites.
 */
export function sandboxLaneEnv(lane) {
  return {
    CI: "1",
    SCRIPTC_PORTABLE_ONLY: "",
    SCRIPTC_SAN: lane === "san" ? "1" : "",
    SCRIPTC_TEST_SHARD: "",
  };
}