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Valiantsin DzerakhandClaude Opus 5.5
a2843c3fbf
A reinstall or a switch to another game version starts with the form filled in. Only absolute paths are stored, never the keys file's contents, and an entry that no longer exists, has the wrong kind or cannot be statted is dropped on load. Follows #715 by DanielSvoboda. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
87 lines
3.2 KiB
Python
87 lines
3.2 KiB
Python
"""The last install folder and source paths, in a per-user file, so an update, a reinstall or a switch to another game
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version starts with the form filled in.
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{"format": 1, "dest": ..., "base": ..., "update": ..., "keys": ..., "firmware": ...}
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Absolute paths only. The keys entry is the path of the keys file, never its contents.
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Windows: %LOCALAPPDATA%\TotK Recomp\setup.json; elsewhere $XDG_STATE_HOME/totk-recomp/setup.json (default
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~/.local/state/totk-recomp/setup.json). TOTK_SETUP_RECENT names another file (tests, --selftest). Nothing else is
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stored: the language comes from the install's own totk-install.json. A file of format 0 (only "dest") still loads.
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"""
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import json
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import os
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import sys
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from pathlib import Path
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from . import state
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FORMAT = 1
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ENV = 'TOTK_SETUP_RECENT'
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FILES = ('base', 'update', 'keys') # recorded when they are files
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SOURCES = FILES + ('firmware',)
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FIELDS = ('dest',) + SOURCES
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def path():
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override = os.environ.get(ENV)
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if override:
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return Path(override)
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if sys.platform == 'win32':
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base = os.environ.get('LOCALAPPDATA') or str(Path.home() / 'AppData' / 'Local')
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return Path(base) / 'TotK Recomp' / 'setup.json'
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base = os.environ.get('XDG_STATE_HOME') or str(Path.home() / '.local' / 'state')
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return Path(base) / 'totk-recomp' / 'setup.json'
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def usable(name, value):
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"""value when it is a non-empty absolute path of the right kind for the field, else None. One stat call per
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path, no file is opened or hashed; a path the OS rejects (embedded NUL, unreachable share) counts as missing."""
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if not isinstance(value, str) or not value or not os.path.isabs(value):
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return None
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try:
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p = Path(value)
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if name == 'dest':
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ok = (p / state.NAME).is_file()
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elif name == 'firmware':
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ok = p.is_dir()
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else:
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ok = p.is_file()
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except (OSError, ValueError):
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return None
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return value if ok else None
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def read():
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try:
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data = json.loads(path().read_text(encoding='utf-8'))
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except (OSError, ValueError):
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return {}
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return data if isinstance(data, dict) else {}
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def load():
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"""The recorded entries that still exist, by field name. Never raises."""
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data = read()
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return {name: data[name] for name in FIELDS if usable(name, data.get(name))}
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def save(dest, sources=None):
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"""Records dest and the non-empty, existing entries of sources (base, update, keys, firmware); an entry left out
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or empty keeps its saved value. Atomic; a failure to write is ignored, the window works without it."""
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target = path()
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tmp = target.with_name(target.name + '.tmp')
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data = {name: v for name, v in read().items() if name in FIELDS and isinstance(v, str)}
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data['dest'] = os.path.abspath(dest)
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for name, value in (sources or {}).items():
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if name in SOURCES and isinstance(value, str) and value.strip():
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value = os.path.abspath(value.strip())
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if usable(name, value):
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data[name] = value
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try:
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target.parent.mkdir(parents=True, exist_ok=True)
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tmp.write_text(json.dumps({'format': FORMAT, **data}), encoding='utf-8')
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os.replace(tmp, target)
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except OSError:
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pass
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