def do_collect_spdx_deps(d):
    # This task calculates the build time dependencies of the recipe, and is
    # required because while a task can deptask on itself, those dependencies
    # do not show up in BB_TASKDEPDATA. To work around that, this task does the
    # deptask on do_create_spdx and writes out the dependencies it finds, then
    # do_create_spdx reads in the found dependencies when writing the actual
    # SPDX document
    import json
    from pathlib import Path

    spdx_deps_file = Path(d.getVar("SPDXDEPS"))

    deps = collect_direct_deps(d, "do_create_spdx")

    with spdx_deps_file.open("w") as f:
        json.dump(deps, f)

do_collect_spdx_deps(d)

def collect_direct_deps(d, dep_task):
    current_task = "do_" + d.getVar("BB_CURRENTTASK")
    pn = d.getVar("PN")

    taskdepdata = d.getVar("BB_TASKDEPDATA", False)

    for this_dep in taskdepdata.values():
        if this_dep[0] == pn and this_dep[1] == current_task:
            break
    else:
        bb.fatal(f"Unable to find this {pn}:{current_task} in taskdepdata")

    deps = set()
    for dep_name in this_dep[3]:
        dep_data = taskdepdata[dep_name]
        if dep_data[1] == dep_task and dep_data[0] != pn:
            deps.add((dep_data[0], dep_data[7]))

    return sorted(deps)