nix/pkgs/python-vars-with-env/codegen.py
Jeltz 5d32735063
indico: use systemd-creds
Signed-off-by: Jeltz <jeltz@federez.net>
2025-04-05 21:19:36 +02:00

56 lines
1.5 KiB
Python
Executable file

from argparse import ArgumentParser
from pathlib import Path
from json import load
# Indico raises a warning for every non prefixed local variable, so we add a
# prefix to each import and declared function
PROLOGUE = (
"import functools as _functools\n"
"@_functools.cache\n"
"def _read_cred(name):\n"
" import os\n"
" dir = os.environ['CREDENTIALS_DIRECTORY']\n"
" with open(os.path.join(dir, name)) as fd:\n"
" return fd.read()\n"
)
def make_value(value):
match value["_pyType"]:
case "str" | "int" | "bool" | "null":
return repr(value["_value"])
case "list":
items = [make_value(i) for i in value["_value"]]
return f"[{','.join(items)}]"
case "dict":
items = [
f"{repr(k)}: {make_value(v)}"
for k, v in value["_value"].items()
]
return f"{{{','.join(items)}}}"
case "read-cred":
return f"_read_cred({repr(value['_value'])})"
case _:
raise ValueError("Unknown data type")
def mk_vars(vars):
if not all(str.isidentifier(n) for n in vars.keys()):
raise ValueError("At least one variable identifier is invalid")
eqs = [f"{n} = {make_value(v)}" for n, v in vars.items()]
return PROLOGUE + "\n".join(eqs)
def main():
parser = ArgumentParser()
parser.add_argument("json", type=Path)
args = parser.parse_args()
with args.json.open() as fd:
print(mk_vars(load(fd)))
if __name__ == "__main__":
main()