Razvan Dimescu 857569495d test: end-to-end FHS path verification + simplify cleanup ...

Two related changes from a /simplify pass and a follow-up testing
finalization:

1. lib.rs cleanup (no behavior change):
   - Drop FHS_LINUX_DATA_DIR and LEGACY_LINUX_DATA_DIR consts. Both
     were used in only 4 places total and the unit tests already
     bypassed them with string literals, so they were over-engineering.
     Inline the strings in daemon_data_dir() and resolve_linux_data_dir().
   - Trim narrating doc/comments on the helper and the test bodies.
     Keep only the non-obvious WHY (the macOS Homebrew note and the
     migration-keeps-legacy rationale).

2. tests/docker/smoke-arch.sh:
   - Cherry-picked the previously-uncommitted Arch compatibility smoke
     test from feat/smoke-arch.
   - Removed the [server] data_dir = "/tmp/numa-smoke" override from
     the test config so the script now exercises the DEFAULT data dir
     code path — which is exactly what the FHS fix touches.
   - Added a path assertion after the dig succeeds: verify that
     /var/lib/numa/ca.pem exists (FHS) and /usr/local/var/numa is
     absent (no accidental dual-creation on a fresh install).

Verified end-to-end on archlinux:latest (Apple Silicon, Rosetta):

  ── building + running numa on archlinux:latest ──
  ── cargo build --release --locked ──
      Finished `release` profile [optimized] target(s) in 24.02s
  ── dig @127.0.0.1 -p 5354 google.com A ──
    142.251.38.206
  ── FHS path check ──
    ✓ CA cert at /var/lib/numa/ca.pem (FHS path)
    ✓ legacy path /usr/local/var/numa absent (fresh install used FHS)
  ── smoke-arch passed ──

This closes the testing gap where the unit tests covered the
path-decision LOGIC in isolation but nothing exercised the live
wiring on a real Linux filesystem.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-08 17:52:03 +03:00

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