Generates Procfiles which can be used with honcho or foreman.

def gen_procfile(ctx, wsgi, dev):
    """Generates Procfiles which can be used with honcho or foreman.
    """
    if wsgi is None:
        if os.path.exists("wsgi.py"):
            wsgi = "wsgi.py"
        elif os.path.exists("app.py"):
            wsgi = "app.py"
        else:
            wsgi = "app.py"
            ctx.invoke(gen_apppy)

    def write_procfile(filename, server_process, debug):
        processes = [server_process] + current_app.processes
        procfile = []
        for name, cmd in procfile_processes(processes, debug).iteritems():
            procfile.append("%s: %s" % (name, cmd))
        with open(filename, "w") as f:
            f.write("\n".join(procfile))

    write_procfile("Procfile", ("web", ["gunicorn", wsgi]), False)
    if dev:
        write_procfile("Procfile.dev", ("web", ["frasco", "serve"]), True)