def do_cleansstate(d):
        sstate_clean_cachefiles(d)

do_cleansstate(d)

def sstate_clean_cachefiles(d):
    for task in (d.getVar('SSTATETASKS') or "").split():
        ld = d.createCopy()
        ss = sstate_state_fromvars(ld, task)
        sstate_clean_cachefile(ss, ld)

def sstate_clean_cachefile(ss, d):
    import oe.path

    if d.getVarFlag('do_%s' % ss['task'], 'task'):
        d.setVar("SSTATE_PATH_CURRTASK", ss['task'])
        sstatepkgfile = d.getVar('SSTATE_PATHSPEC')
        bb.note("Removing %s" % sstatepkgfile)
        oe.path.remove(sstatepkgfile)

def sstate_state_fromvars(d, task = None):
    if task is None:
        task = d.getVar('BB_CURRENTTASK')
        if not task:
            bb.fatal("sstate code running without task context?!")
        task = task.replace("_setscene", "")

    if task.startswith("do_"):
        task = task[3:]
    inputs = (d.getVarFlag("do_" + task, 'sstate-inputdirs') or "").split()
    outputs = (d.getVarFlag("do_" + task, 'sstate-outputdirs') or "").split()
    plaindirs = (d.getVarFlag("do_" + task, 'sstate-plaindirs') or "").split()
    lockfiles = (d.getVarFlag("do_" + task, 'sstate-lockfile') or "").split()
    lockfilesshared = (d.getVarFlag("do_" + task, 'sstate-lockfile-shared') or "").split()
    interceptfuncs = (d.getVarFlag("do_" + task, 'sstate-interceptfuncs') or "").split()
    fixmedir = d.getVarFlag("do_" + task, 'sstate-fixmedir') or ""
    if not task or len(inputs) != len(outputs):
        bb.fatal("sstate variables not setup correctly?!")

    if task == "populate_lic":
        d.setVar("SSTATE_PKGSPEC", "${SSTATE_SWSPEC}")
        d.setVar("SSTATE_EXTRAPATH", "")
        d.setVar('SSTATE_EXTRAPATHWILDCARD', "")

    ss = sstate_init(task, d)
    for i in range(len(inputs)):
        sstate_add(ss, inputs[i], outputs[i], d)
    ss['lockfiles'] = lockfiles
    ss['lockfiles-shared'] = lockfilesshared
    ss['plaindirs'] = plaindirs
    ss['interceptfuncs'] = interceptfuncs
    ss['fixmedir'] = fixmedir
    return ss

def sstate_add(ss, source, dest, d):
    if not source.endswith("/"):
         source = source + "/"
    if not dest.endswith("/"):
         dest = dest + "/"
    source = os.path.normpath(source)
    dest = os.path.normpath(dest)
    srcbase = os.path.basename(source)
    ss['dirs'].append([srcbase, source, dest])
    return ss

def sstate_init(task, d):
    ss = {}
    ss['task'] = task
    ss['dirs'] = []
    ss['plaindirs'] = []
    ss['lockfiles'] = []
    ss['lockfiles-shared'] = []
    return ss