The host-side /opt/dashcaddy/scripts/dashcaddy-update.sh was hardened in
DC-025 (commit bfa4ba5, 2026-07-05), but the canonical script at
dashcaddy-api/scripts/dashcaddy-update.sh was never updated. This created
a drift hazard: anyone running release.sh and rebuilding the install
tarball would propagate the pre-hardening version, undoing DC-025 on
fresh hosts.
This commit syncs the hardening from the host-side script to the canonical,
so the next release builds and ships the hardened version. Specifically
adds:
- channel_allowed() gate (refuse prereleases unless ALLOW_PRERELEASE=true)
- deploy_mode() dispatch (compose / start.sh / bare docker run)
- build_image() helper
- deploy_tree() with chattr +i preservation and empty-staging-dir guard
- Post-deploy patches invocation (dashcaddy-post-deploy-patches.sh)
- dns-providers directory backup/restore
Verified: bash -n passes on both scripts; canonical and host-side are now
byte-identical (md5 a72e1dc37fb3487edc00e81ea37ac60b).
Discovered while investigating a WIP on DNS2 that had silently reverted
these features. That WIP was discarded (the BACKLOG entry it claimed to
satisfy described an implementation that didn't exist in the diff).
Krystie
ca705fe59f