Reliable shutdown on Windows + lelab --stop#46
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On Windows, stopping LeLab (Ctrl-C / closing the terminal) often leaves the
uvicorn and Vite child processes alive, which keeps port :8000 — and any open
camera handles — held. The next `lelab` then fails to bind, or a camera won't
open because the previous run never released it.
- `lelab --stop`: find and terminate a running LeLab and its child process tree,
freeing the port.
- Clean process-tree teardown on exit (psutil, with a Windows `taskkill /T`
fallback) so the uvicorn/Vite children and their handles are actually released.
- Pre-flight port checks with an actionable message ("…run `lelab --stop` to free
it") instead of an opaque bind error, plus a readiness wait before opening the
browser.
Tests in tests/test_scripts_lelab.py cover the stop / teardown / port-check paths
with mocked psutil + subprocess (no real processes spawned).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Problem
On Windows, stopping
lelab(Ctrl-C / closing the terminal) often leaves the uvicorn and Vite child processes alive, which keeps port:8000— and any open camera handles — held. The nextlelabthen fails to bind, or a camera won't open because the previous run never released it.What this does
lelab --stop— finds and terminates a running LeLab and its child process tree, freeing the port.taskkill /Tfallback) so the uvicorn/Vite children and their handles are actually released.lelab --stopto free it") instead of an opaque bind error, plus a readiness wait before opening the browser.Tests
tests/test_scripts_lelab.pycovers the stop / teardown / port-check paths with mockedpsutil+subprocess(no real processes spawned).🤖 Generated with Claude Code