# Provides git describe tag from yocto root directory

EXTERNALSRC = "${@os.path.abspath(os.path.join("${TOPDIR}", os.pardir))}"

def get_externalsrc_rev(d):
    import subprocess
    srcdir = d.expand(d.getVar("EXTERNALSRC"))
    #bb.note("external source: %s" % (srcdir))
    rev = subprocess.check_output("cd %s && git describe --tags --dirty " % (srcdir),
                                  shell=True).strip()
    
    rev = rev.decode("utf-8") 
    d.setVar('BB_DONT_CACHE', '1')
    return rev

EXTERNALSRC_GIT_SRCREV := "${@get_externalsrc_rev(d)}"