Distilled from the previous net/dataset experiment and the inline
closure version in check-ip. Keeps what actually earned its keep:
- Group ties one Fetcher to N views; a single Load drives all swaps,
so shared sources (one git pull, one zip download) don't get
re-fetched per view.
- View[T].Value() is a lock-free atomic read; the atomic.Pointer is
hidden so consumers never see in-flight reloads.
- Tick runs Load on a ticker with stderr error logging.
Dropped from the v1 design: MultiSyncer (callers fan-out inline when
needed), Close (unused outside geoip), Name (callers wrap the logger),
standalone Dataset type (Group with one view covers it), Sync vs Init
asymmetry (Load handles first-call vs update internally).
check-ip rewires to use it — file/git/http modes all build a Group
with two views, uniform shape.
Databases is now just two *geoip2.Reader fields with Open/Close/PrintInfo.
OpenDatabases still auto-discovers conf and downloads stale .mmdb files
via httpcache before opening, but it no longer runs background goroutines
or holds atomic pointers. Long-running callers that want refresh can wire
httpcache.Cacher to atomic.Pointer themselves.
check-ip drops geo.Init/geo.Run — OpenDatabases does the fetch+open work
itself, and a one-shot CLI doesn't need background refresh.
Uses atomic.Pointer[ipcohort.Cohort] directly and builds a per-source
refresh closure (files / git / http). One goroutine drives the ticker.
Exercises what the dataset pkg was abstracting so we can judge which
bits are worth a shared pkg.
Extract the file/git/httpcache mode switch into newSource and the Group
wiring into newBlocklists. main becomes flag parsing + exit code logic
only; run owns ctx and the check. Helpers (loadCohort, cacheDir,
splitCSV, loadWhitelist) are small and single-purpose.
Still exercises dataset.Group + background refresh, gitshallow, and
httpcache as before.
OpenDatabases(confPath, cityPath, asnPath) handles conf discovery, cache
dir setup, and Databases construction. DefaultConfPaths lists the standard
GeoIP.conf locations. cmd/check-ip/geo.go deleted; main calls one function.
Remove View[T] — Add now returns *Dataset[T] directly. Callers use Load()
on the returned Dataset; Init/Run belong to the owning Group.
main.go simplified: declare syncer + file paths per case, then one
g.Init() and one g.Run(). No manual loops over individual datasets.
Add gitshallow.Repo.FilePath helper.
Blocklist:
- Add -inbound, -outbound, -whitelist flags for explicit file paths
- buildSources() replaces the old constructor trio; explicit flags always win
- -data-dir and -git still work as defaults for the bitwire-it layout
GeoIP:
- Auto-discover GeoIP.conf from ./GeoIP.conf then ~/.config/maxmind/GeoIP.conf
- If no conf found and no -city-db/-asn-db given: geoip disabled silently
- If no conf but paths given: use those files (Init fails if absent)
- Each package gets its own go.mod: net/{dataset,httpcache,gitshallow,ipcohort,geoip,formmailer}
- go.work with replace directives for cross-module workspace resolution
- dataset.Syncer/NopSyncer moved here from httpcache; callers duck-type it
- dataset.View[T] returned by Add to prevent Init/Sync/Run misuse on group members
- cmd/check-ip moved from net/ipcohort/cmd/check-ip to top-level cmd/check-ip
- Add net/ipcohort/cmd/ipcohort-contains for standalone cohort membership testing
