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).
- Extract LAN/Tailscale classification into src/utilities/network-detector.js
(detectInterfaceIps, isTailscaleIP, isPrivateLanIP). The route handler in
src/app.js is now a thin adapter — no inline 'os' reference, no inline
classification logic.
- Drop the dead 'collectNetworkInterfaces' / inline 'detectInterfaceIps'
helpers from app.js (the original ReferenceError shape).
- Add __tests__/network-ips-route.test.js (16 tests):
- Detector unit tests for Tailscale CGNAT (100.64/10) and RFC 1918 LAN
ranges with malformed-input guards.
- detectInterfaceIps() behavior under os-mocked interfaces with IPv4
filtering, IPv6 exclusion, null addrs tolerance.
- Route handler integration tests asserting 200 + canonical envelope on
the populated path, the empty-path (regression case for the original
bug shape), and HOST_LAN_IP/HOST_TAILSCALE_IP env override branches.
- Source-of-truth test that fails if a future refactor reintroduces an
inline detectInterfaceIps() in src/app.js or references 'os' without
a prior require('os') line.
- Fix latent ESLint Error in backup-manager.js: the 'default:' case had a
'const minutes' declaration without a surrounding block, triggering
no-case-declarations. Added the block braces.
Pre-fix baseline: no test exercised this route, so the 1071-test suite
passed despite the 500. Post-fix: 1087/1087 tests pass (+16 new), zero new
ESLint warnings (10 pre-existing warnings in backup-manager.js unrelated
to this commit).
Krystie