Run evolve.py to infer subclonal composition.

def _run_evolve(ssm_file, cnv_file, work_dir, data):
    """Run evolve.py to infer subclonal composition.
    """
    exe = os.path.join(os.path.dirname(sys.executable), "evolve.py")
    assert os.path.exists(exe), "Could not find evolve script for PhyloWGS runs."
    out_dir = os.path.join(work_dir, "evolve")
    out_file = os.path.join(out_dir, "top_k_trees")
    if not utils.file_uptodate(out_file, cnv_file):
        with file_transaction(data, out_dir) as tx_out_dir:
            with utils.chdir(tx_out_dir):
                cmd = [sys.executable, exe, "-r", "42", ssm_file, cnv_file]
                do.run(cmd, "Run PhyloWGS evolution")
    return out_file