mirror of
https://github.com/tangerineturtle1/NX2navi.git
synced 2026-11-15 19:19:58 -04:00
d2ab9a00be
Run from a checkout, the launcher uses the Python that started it. A Python older than 3.14 without the zstandard package got through the first-run screen and stopped at Gather Build Tools with only "No module named 'zstandard'", after the packages were downloaded. toolchain.zstd_missing now looks for compression.zstd or zstandard when the launcher starts. Without either, the log and the first screen name the Python and give the pip line for tools/requirements-launcher.txt, and Gather Build Tools stops with the same message before it unpacks anything. A release's own Python always has the package; if it ever lacks it, the message says to reinstall NX2navi. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
62 lines
2.4 KiB
Python
62 lines
2.4 KiB
Python
"""What every part of the launcher shares: the folder layout, the settings and the log (data/logs/launcher.log,
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the run before it in launcher.1.log)."""
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import os
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import threading
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import time
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from .paths import Layout
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from .settings import Settings
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LOG_LIMIT = 4 << 20
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class Context:
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def __init__(self, layout=None, echo=False):
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self.layout = (layout or Layout()).ensure()
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self.settings = Settings(self.layout.settings)
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self.version = self.layout.version
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self.echo = echo
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self._lock = threading.Lock()
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path = self.layout.logs / 'launcher.log'
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try:
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if path.is_file() and path.stat().st_size > LOG_LIMIT:
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os.replace(path, path.with_name('launcher.1.log'))
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except OSError:
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pass
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try:
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self._file = open(path, 'a', encoding='utf-8', errors='replace')
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except OSError:
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self._file = None
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self.log(f'--- NX2navi launcher {self.version} ({"checkout" if self.layout.dev else "release"}) in '
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f'{self.layout.root}')
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from .toolchain import zstd_missing
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self.zstd_missing = zstd_missing(self.layout)
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if self.zstd_missing:
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self.log(self.zstd_missing)
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if self.settings.unreadable:
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self.log(f'{self.layout.settings} is not valid JSON: the settings start from their defaults; the file as '
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'it was is kept as launcher.json.bad')
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def log(self, line):
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"""One line (or several) into launcher.log. A log that cannot be written (a full disk, a file closed under
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it) loses the line and nothing else: the callers log from the build's reader thread and from the window's
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timers, where an exception would stop the build's output from being read or the timer from running."""
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stamp = time.strftime('%H:%M:%S')
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with self._lock:
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if self._file:
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try:
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for part in str(line).splitlines() or ['']:
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self._file.write(f'{stamp} {part}\n')
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self._file.flush()
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except (OSError, ValueError): # ValueError: the file was closed
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pass
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if self.echo:
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print(line, flush=True)
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def log_tail(self, n=80):
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try:
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with open(self.layout.logs / 'launcher.log', encoding='utf-8', errors='replace') as f:
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return f.readlines()[-n:]
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except OSError:
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return []
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