Version 0.18.2

Features

lager box update is now the canonical update command. The top-level lager update keeps working as a hidden alias for existing scripts but prints a deprecation notice. Same flag set; runs through the same flow.
--check flag for dry-run updates. lager box update --box X --check reports what would change (code, deps, container) without touching the box. Useful for CI gating and pre-deploy checks.
Docker cache auto-invalidates when Dockerfile or requirements.txt change. No more remembering to pass --force after a deps bump — the next update detects the drift and rebuilds.

Updates now take effect on the first run. Fixes a cluster of bugs behind the recurring “had to run lager update 2–3 times before it stuck” reports: stale /etc/lager/version after the early-exit branch, the flatten heuristic re-fetching on every run, the 5-second post-restart sleep racing against an unready service, silent flatten failures producing broken images, and the cache-invalidation early-exit skipping rebuilds when only deps had changed.
Branch switches with conflicting root-level files no longer fail. Adds git checkout -f so a previous flatten step that clobbered a tracked file (e.g. README.md) doesn’t block the switch with “local changes would be overwritten.”
Git errors are now shown. git checkout and git reset --hard failures used to surface only “Failed to checkout version X” without git’s underlying error message.

Consecutive no-op lager box update runs are ~10× faster. SSH calls multiplex through a single OpenSSH ControlMaster connection — ~20s → ~1.6s.
Cleaner output. Single green summary line, progress bar adapts to terminal width, elapsed time appears on the bar itself.
--all, --force, --skip-restart flags removed. --all will return as its own command if needed; --force is obsoleted by auto cache-invalidation; --skip-restart had no real workflow.

To install this version:

pip install lager-cli==0.18.2

To upgrade from a previous version:

pip install --upgrade lager-cli