fix: prevent git gc daemon from blocking unmount #22
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… unmount git gc --auto defaults to gc.autoDetach=true, which forks a background daemon for the actual garbage collection work. The parent returns immediately with exit code 0, but the daemonized child (and its sub-processes) keep running with cwd and mmap'd pack files on the mirror mount. This causes subsequent umount attempts to fail with EBUSY (exit code 32). Root cause identified in descriptinc/descript: 4 git processes (PIDs 10316-10319) with cwd inside the mirror, preventing unmount despite 3 retry attempts with exponential backoff. Fix: Pass -c gc.autoDetach=false to force synchronous GC execution so it fully completes before proceeding to mount cleanup. Also increase GC_TIMEOUT_SECS from 60s to 120s: measured GC on this repo takes ~74 seconds to repack 51 packs + 1019 loose objects. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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Summary
git gc --autodefaults togc.autoDetach=true, forking a background daemon that keeps running with file handles on the mirror mount, causingumountto fail with EBUSY (exit code 32)-c gc.autoDetach=falseto force synchronous GC executionTest plan
gc.autoDetach=false🤖 Generated with Claude Code
Note
Low Risk
Small, targeted change to the git GC invocation and timeout; primary risk is longer cleanup time or behavior differences on older git versions.
Overview
Prevents sticky-disk unmount failures caused by
git gc --autodaemonizing in the background.runMirrorGCnow forces synchronous execution viagit -c gc.autoDetach=false gc --auto, and the GC timeout is increased from 60s to 120s (mirrored indist/index.js).Written by Cursor Bugbot for commit 4c2bc4c. This will update automatically on new commits. Configure here.