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typikon/tests/parity/oracle.py
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"""The command line's answer, which every other surface is measured against."""
import json
import os
import subprocess
import sys
FIELDS = [
"date", "weekday", "jurisdiction", "calendar", "churchDate", "season",
"cycle", "feast", "rank", "sign", "tradition", "title", "commemorations",
"fast", "fastLabel", "emoji", "reason", "obligation", "binds", "pascha",
"daysToPascha", "julianOffset",
]
cli, probes_path, out_path = sys.argv[1:4]
# Neither a config file nor a fetched menaion may reach any surface, or the
# comparison measures the machine rather than the code. The caller has already
# pointed these at empty directories; this only refuses to run without them,
# because an oracle that quietly read the developer's own jurisdiction would
# make every surface agree about the wrong thing.
env = dict(os.environ)
for var in ("XDG_CONFIG_HOME", "XDG_DATA_HOME"):
if not env.get(var):
sys.exit(f"{var} must be set to an empty directory before reckoning the oracle")
out = {}
for date, jurisdiction, typikon in json.load(open(probes_path)):
args = [cli, "--date", date, "--jurisdiction", jurisdiction, "--json",
"--typikon" if typikon else "--no-typikon"]
day = json.loads(subprocess.run(args, capture_output=True, text=True,
env=env, check=True).stdout)
out[f"{date}|{jurisdiction}|{int(typikon)}"] = {k: day[k] for k in FIELDS}
json.dump(out, open(out_path, "w"), ensure_ascii=False)
print(f"oracle: {len(out)} probes, {len(FIELDS)} fields")