Artifact [9fe4cc385e]

Artifact 9fe4cc385ee8eee69d5d8e654d55d2d90e8d68506161a1f84ba765536f631e29:

• File internal/sync/stubs.go — part of check-in [7d9536347a] at 2026-10-22 21:03:07 on branch feat/horizon-cones — feat(sync): hand out and record the horizon cursor on clone

  The draft has an origin that classified a request emit the cursor in every reply, and a client that converged record the last reply's cursor with its artifact count per origin. A clone did neither, so the first exchange that sends after a horizon clone announced the whole holding.

  A clone reply now carries the position it served the clone sequence through: below the sequence it hands on, or the origin's whole position once it hands on none. A horizon clone that names its origin records the last cursor and its own count, as zit does; the HTTP transport names it for the public Clone as for Sync. (user: [email protected], size: 2419) [annotate] [blame] [check-ins using] [more...]

package sync

import (
	"github.com/danmestas/go-libfossil/internal/cone"
	"github.com/danmestas/go-libfossil/internal/horizon/seed"
	"github.com/danmestas/go-libfossil/simio"
)

// CloneOpts configures a clone operation.
type CloneOpts struct {
	StoreCone *cone.Cone // nil is dense; local policy, never synchronized
	User      string     // Credentials for clone auth (also default admin user)
	Password  string
	Version   int            // Protocol version (default 3)
	Env       *simio.Env     // nil defaults to RealEnv
	Observer  Observer       // nil defaults to no-op
	Buggify   BuggifyChecker // fault injection for DST (nil = no faults)
	// PullPhantoms, when set, makes Clone fetch the artifacts the clone
	// rounds left missing with a follow-up pull session, and fail with a
	// *PhantomStallError if any are still missing after it. That pull
	// departs from Section 8.2 of the sync draft, which sends no clone,
	// pull or push card after clone_seqno 0, so it is off by default.
	PullPhantoms bool
	// SeedVerifier checks the seed of a structural horizon against the
	// origin's key (draft-fossil-horizon-00 §5.2.4); nil accepts an unsigned
	// seed, as a clone knowing no key does.
	SeedVerifier seed.Verifier
	// Origin names the peer the clone addresses, keying the horizon cursor
	// a converged horizon clone records (draft-fossil-horizon-00 §6.2.6) as
	// SyncOpts.Origin keys a sync's. Empty keeps none.
	Origin string
}

// CloneResult reports what happened during a clone.
type CloneResult struct {
	Elided        int // artifacts deliberately absent under the store cone
	ConeServed    int // replies acknowledging the store cone (sparse-cone §6.3); the rest were filtered locally
	HorizonServed int // replies serving the store's horizon at either level (horizon §6.2.5); the rest were classified locally
	// StructuralServed counts the replies that served the structural level,
	// and HorizonFallback reports a structural clone that kept the content
	// horizon instead: its origin did not serve the structural level with a
	// seed in the first reply, or the seed failed its provenance (§5.1,
	// §5.2.4, §6.3).
	StructuralServed int
	HorizonFallback  bool
	Rounds           int
	BlobsRecvd       int
	ArtifactsLinked  int // Manifests crosslinked into event table
	ProjectCode      string
	ServerCode       string
	Messages         []string // Informational messages from server
}