When the memoize cache lock is held by another process (e.g., a stale
Docker container from a previous interrupted build), the build would
hang indefinitely without any feedback to the user.
This change:
- First tries non-blocking flock, acquiring immediately if available
- If lock is busy, informs user and waits with periodic status messages
- Adds MEMOIZE_FLOCK_WAIT_INTERVAL (default 10s) for message frequency
- Adds MEMOIZE_FLOCK_MAX_WAIT (default 0=infinite) for optional timeout
- Allows user to interrupt with Ctrl+C
- Suggests checking for stale containers: docker ps -a | grep armbian
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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