Files
libretro/tests/test_launcher_layer.py
T
Abdessamad Derraz b2b8dcd62c feat: read platform launchers in verify and packs
A names_searched list is one place the launcher fills with the first name it finds, so a core file it would never open once another name of the list is held is not reported missing. A place no declared file and no packed core file fills receives, under the launcher's name, a file the core accepts by content. The layer is applied inside find_undeclared_files, which verify and the pack builder both read, and a test reads their source to keep it there.
2026-10-20 21:26:48 +02:00

234 lines
9.3 KiB
Python

"""The launcher layer read by verify and by the pack builder.
A platform's launcher decides which name a file is read under. The fixtures
give a synthetic platform three launcher records: a region list tried in
order (Batocera's DuckStation shape), a second list no declared file fills,
and a fixed path the launcher passes (Batocera's x16emu shape).
"""
from __future__ import annotations
import hashlib
import inspect
import os
import shutil
import sys
import tempfile
import unittest
import zipfile
sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "scripts"))
import yaml # noqa: E402
from common import _emulator_profiles_cache, load_emulator_profiles, load_platform_config # noqa: E402
from launchers import LauncherLayer, launcher_places # noqa: E402
from verify import find_undeclared_files, verify_platform # noqa: E402
CONTENT = {
"b.bin": b"REGION_B_IMAGE",
"e.bin": b"IMAGE_KNOWN_AS_E",
"core.bin": b"CORE_DEFAULT_ROM",
"plain.bin": b"PLAIN_CORE_FILE",
}
def _md5(data: bytes) -> str:
return hashlib.md5(data).hexdigest()
class LauncherLayerTest(unittest.TestCase):
def setUp(self) -> None:
_emulator_profiles_cache.clear()
self.root = tempfile.mkdtemp()
self.bios_dir = os.path.join(self.root, "bios")
self.platforms_dir = os.path.join(self.root, "platforms")
self.emulators_dir = os.path.join(self.root, "emulators")
for d in (self.bios_dir, self.platforms_dir, self.emulators_dir):
os.makedirs(d)
files: dict[str, dict] = {}
by_md5: dict[str, str] = {}
by_name: dict[str, list[str]] = {}
for name, data in CONTENT.items():
path = os.path.join(self.bios_dir, name)
with open(path, "wb") as fh:
fh.write(data)
sha1 = hashlib.sha1(data).hexdigest()
files[sha1] = {
"path": path, "name": name, "md5": _md5(data), "sha1": sha1,
"size": len(data), "crc32": "",
}
by_md5[_md5(data)] = sha1
by_name.setdefault(name, []).append(sha1)
self.db = {
"files": files,
"indexes": {
"by_md5": by_md5, "by_name": by_name, "by_crc32": {},
"by_path_suffix": {},
},
}
platform = {
"platform": "LauncherTest",
"verification_mode": "md5",
"base_destination": "bios",
"standalone_cores": ["psxemu", "fixemu"],
"systems": {
"test-sys": {
"files": [
{"name": "plain.bin", "destination": "plain.bin",
"md5": _md5(CONTENT["plain.bin"]), "required": True},
],
},
},
"launchers": [
{
"emulator": "psxemu", "build": "standalone",
"kind": "names_searched", "slot": "NTSCU",
"names": ["a.bin", "b.bin", "c.bin"],
"case_insensitive": True, "search_dir": "/userdata/bios",
"source_ref": "gen/psx.py:10-20",
},
{
"emulator": "psxemu", "build": "standalone",
"kind": "names_searched", "slot": "PAL",
"names": ["d.bin", "e.bin"],
"case_insensitive": True, "search_dir": "/userdata/bios",
"source_ref": "gen/psx.py:21-30",
},
{
"emulator": "fixemu", "build": "standalone",
"kind": "fixed_name", "names": ["sub/fix.bin"],
"search_dir": "/userdata/bios",
"source_ref": "gen/fix.py:5",
},
],
}
with open(os.path.join(self.platforms_dir, "launchertest.yml"), "w") as fh:
yaml.dump(platform, fh)
profiles = {
"psxemu": {
"emulator": "PsxEmu", "type": "standalone", "found_by": "content",
"systems": ["test-sys"],
"files": [
{"name": "a.bin", "required": True,
"md5": "0" * 32, "validation": ["md5"]},
{"name": "b.bin", "required": True,
"md5": _md5(CONTENT["b.bin"]), "validation": ["md5"]},
{"name": "label_pal.bin", "required": True,
"md5": _md5(CONTENT["e.bin"]), "validation": ["md5"]},
],
},
"fixemu": {
"emulator": "FixEmu", "type": "standalone", "systems": ["test-sys"],
"files": [
{"name": "core.bin", "aliases": ["fix.bin"], "required": True},
],
},
}
for key, profile in profiles.items():
with open(os.path.join(self.emulators_dir, f"{key}.yml"), "w") as fh:
yaml.dump(profile, fh)
self.config = load_platform_config("launchertest", self.platforms_dir)
self.profiles = load_emulator_profiles(self.emulators_dir)
def tearDown(self) -> None:
shutil.rmtree(self.root)
def _report(self) -> list[dict]:
return find_undeclared_files(
self.config, self.emulators_dir, self.db, self.profiles,
)
def _pack_names(self) -> set[str]:
from generate_pack import generate_pack
output = os.path.join(self.root, "dist")
os.makedirs(output)
zip_path = generate_pack(
"launchertest", self.platforms_dir, self.db, self.bios_dir, output,
emulators_dir=self.emulators_dir, emu_profiles=self.profiles,
offline=True,
)
self.assertIsNotNone(zip_path)
with zipfile.ZipFile(zip_path) as zf:
return set(zf.namelist())
def test_places_follow_the_launcher_order(self) -> None:
places = launcher_places(self.config)
self.assertEqual(places[0].paths, ("a.bin", "b.bin", "c.bin"))
self.assertEqual(places[2].paths, ("sub/fix.bin",))
self.assertTrue(places[0].stands_for_default)
def test_held_alternative_settles_the_others(self) -> None:
"""b.bin fills the NTSCU list, so a.bin is not missing there."""
report = self._report()
names = {u["name"]: u for u in report}
self.assertNotIn("a.bin", names)
self.assertTrue(names["b.bin"]["in_repo"])
def test_without_the_layer_the_alternative_is_missing(self) -> None:
config = {**self.config, "launchers": []}
names = {
u["name"]: u
for u in find_undeclared_files(config, self.emulators_dir, self.db, self.profiles)
}
self.assertFalse(names["a.bin"]["in_repo"])
def test_accepted_content_lands_under_the_launcher_name(self) -> None:
"""No declared file fills PAL: the image the core accepts goes in as e.bin."""
added = {u["path"]: u for u in self._report() if u.get("launcher")}
self.assertIn("e.bin", added)
self.assertEqual(added["e.bin"]["md5"], _md5(CONTENT["e.bin"]))
self.assertEqual(added["e.bin"]["launcher_of"], "label_pal.bin")
def test_fixed_name_receives_the_held_file(self) -> None:
added = {u["path"]: u for u in self._report() if u.get("launcher")}
self.assertIn("sub/fix.bin", added)
self.assertEqual(added["sub/fix.bin"]["md5"], _md5(CONTENT["core.bin"]))
def test_no_place_is_filled_twice(self) -> None:
added = [u["path"] for u in self._report() if u.get("launcher")]
self.assertEqual(sorted(added), ["e.bin", "sub/fix.bin"])
def test_a_declared_name_fills_the_place(self) -> None:
layer = LauncherLayer(
self.config, self.profiles, self.profiles, self.db, {"B.BIN"},
)
self.assertTrue(layer.platform_holds(layer.places[0]))
self.assertFalse(layer.platform_holds(layer.places[1]))
def test_verify_and_pack_agree(self) -> None:
result = verify_platform(self.config, self.db, self.emulators_dir, self.profiles)
missing = [
u["name"] for u in result["undeclared_files"]
if not u["in_repo"] and u.get("category", "bios") != "game_data"
]
self.assertEqual(missing, [])
names = self._pack_names() - {"README.txt"}
for expected in ("e.bin", "sub/fix.bin", "b.bin"):
self.assertIn(expected, names)
self.assertNotIn("a.bin", names)
self.assertEqual(result["packed_extras"]["bios"], len(names - {"plain.bin"}))
def test_one_decision_for_verify_and_pack(self) -> None:
"""The layer is applied once, in the report both sides read."""
import generate_pack
import packextras
import verify
self.assertIn("LauncherLayer(", inspect.getsource(verify.find_undeclared_files))
self.assertIn(".settle(", inspect.getsource(verify.find_undeclared_files))
self.assertIn(
"find_undeclared_files(", inspect.getsource(packextras._collect_emulator_extras)
)
for module in (generate_pack, packextras, verify):
source = inspect.getsource(module)
with self.subTest(module=module.__name__):
self.assertNotIn("launcher_places(", source)
if module is not verify:
self.assertNotIn("LauncherLayer(", source)
if __name__ == "__main__":
unittest.main()