Summary

This PR improves the ISO build process with better package caching and Docker container management.

Changes

1. 24-Hour Package Cache Window

Problem: Arch packages update rapidly (multiple times per day). Daily cache can break builds mid-day when packages are updated.

Solution: Changed cache from daily to 24-hour window with hourly timestamps.

• Cache format: iso_YYYYMMDD_HH (e.g., iso_20260111_14)
• Cache location: ~/.cache/omarchy/iso_YYYYMMDD_HH/
• Behavior: Cache is valid for 24 hours from first build in that hour
• Benefits:
  • Prevents rapid package updates from breaking builds
  • Keeps packages reasonably fresh
  • Allows multiple builds within same hour to reuse cache

Example:

• Build at 14:30 → Cache: iso_20260111_14 (reused until 14:00 next day)
• Build at 15:00 → New cache: iso_20260111_15 (new hourly cache)
• Build next day at 14:00 → New cache: iso_20260112_14 (24h window expired)

2. Docker Container Cleanup

Problem: Previous builds left containers running or stopped, causing conflicts and accumulation.

Solution: Use named containers with automatic cleanup.

• Container name: omarchy-iso-build-$(id -u) (user-specific)
• Safety: Only containers with exact name are touched - other containers are safe
• Behavior:
  • Automatically removes previous build containers before starting
  • Cleans up container after build completes
  • Prevents container accumulation

Benefits:

• No more container conflicts
• Cleaner Docker environment
• Safe for other containers (only touches specific named containers)

3. Convenience Script (Bonus)

Added omarchy-iso-make-local as a convenience wrapper for local development:

• Pre-configured for building with local source
• Sets OMARCHY_PATH automatically
• Useful for developers working on installer changes

Files Changed

• bin/omarchy-iso-make - Cache and container management improvements
• bin/omarchy-iso-make-local - New convenience script (optional, can be removed if not needed)

Testing

• ✅ Tested with multiple builds in same hour (cache reuse works)
• ✅ Tested with builds across different hours (new cache created)
• ✅ Tested container cleanup (no conflicts, safe cleanup)
• ✅ Tested with --no-cache flag (still works)

Backward Compatibility

• ✅ Fully backward compatible
• ✅ --no-cache flag still works
• ✅ All existing functionality preserved
• ✅ No breaking changes