test if migration for a package is ready

check_mugration_status.py

import sys
import logging
from contextlib import redirect_stdout, redirect_stderr
import io

from conda_forge_tick.utils import load_graph
from conda_forge_tick.auto_tick import migration_factory


migration = sys.argv[1]
node = sys.argv[2]

logger = logging.getLogger("conda_forge_tick.migrators.core")
logger.setLevel(logging.DEBUG)
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
logger.addHandler(ch)

print("loading the graph...", end="", flush=True)
gx = load_graph()
print("done", flush=True)

m = []

print("reading migrators...", end="", flush=True)
f = io.StringIO()
with redirect_stderr(f), redirect_stdout(f):
    migration_factory(m, gx)
print("done", flush=True)

my_mg = None
for mg in m:
    if mg.name == migration:
        my_mg = mg

if my_mg is None:
    raise RuntimeError(
        "Could not find migration '%s'! current names: %s" % (
            migration,
            [mg.name for mg in m]))

print("migrator:", my_mg.name, flush=True)
with gx.nodes[node]['payload'] as attrs:
    print("graph node:", node, flush=True)
    print("migration ready?", not my_mg.filter(attrs), flush=True)