https://eng.hroncok.cz/2020/05/14/ilua-rpm-console

rpmlua

#!/usr/bin/python3
# Copyright (c) 2020-2021 Fedora Project
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
import sys
from ctypes import cdll, c_char_p
from ctypes.util import find_library


librpm = cdll.LoadLibrary(find_library("rpm"))
librpmio = cdll.LoadLibrary(find_library("rpmio"))


# Load general configuration (such as macros defined in standard places)
# Second argument is target platform, NULL is the default
librpm.rpmReadConfigFiles(librpm.rpmcliRcfile, None)


adjust_path = b"""
if os.getenv("LUA_PATH") then
    package.path =  os.getenv("LUA_PATH") .. ";" .. package.path
end
"""

# first argument is an "rpmlua" pointer, but uses global one when NULL
# second argument is code
# third argument is "name", used in errors, reasonable default when NULL
# 4th and 5th arguments were added in RPM 4.17+ only, for passing options and arguments
librpmio.rpmluaRunScript(None, c_char_p(adjust_path), None, None, None)

if len(sys.argv) > 1:
    sys.argv[-1] = '/dev/stdin' if sys.argv[-1] == '-' else sys.argv[-1]
    # first argument as above, second argument is path
    librpmio.rpmluaRunScriptFile(None, c_char_p(sys.argv[-1].encode("utf-8")))
else:
    librpmio.rpmluaRunScript(None, c_char_p(b"rpm.interactive()"), None, None, None)