Artifact [585384ea2e]

Artifact 585384ea2e1e0b39f21202015245b06a221e88b2d2176e06e4d002bf20559b8d:

• File internal/uv/status.go — part of check-in [f5744359d3] at 2026-04-19 16:30:54 on branch trunk — Initial open source release

  libfossil is a pure-Go implementation of the Fossil SCM, reading and writing the same .fossil SQLite repository format as upstream Fossil.

  This is the first public release of code that previously lived in a private repository. The module path is github.com/danmestas/libfossil and the binary is named libfossil to avoid $PATH collisions with upstream fossil.

  Included: - Repo lifecycle (create, clone), checkout/checkin, timeline, merge, diff, annotate, shun, tag, branch, bisect, stash, undo/redo - Sync-over-HTTP protocol (client and handler) - Two SQLite drivers: modernc (pure Go, default) and ncruces (wasm-capable) - Observer interfaces (SyncObserver, CheckoutObserver) with an optional OpenTelemetry implementation in observer/otel (separate submodule) - Deterministic simulation testing harness with BUGGIFY fault injection - Kong-based embeddable CLI under cli/ and a standalone binary under cmd/libfossil/ (user: [email protected], size: 1458) [annotate] [blame] [check-ins using]

package uv

// Status compares a local unversioned file against a remote one and returns
// an action code. Exact port of Fossil's unversioned_status().
//
// localMtime==0 means no local row (returns 0).
// localHash="" with localMtime>0 means tombstone (participates in mtime comparison).
// "-" means deletion marker in either position.
//
// Return codes:
//
//	0 = not present locally (pull)
//	1 = different hash, remote newer or tiebreaker (pull)
//	2 = same hash, remote mtime older (pull mtime only)
//	3 = identical (no action)
//	4 = same hash, remote mtime newer (push mtime only)
//	5 = different hash, local newer or tiebreaker (push)
func Status(localMtime int64, localHash string, remoteMtime int64, remoteHash string) int {
	if localMtime == 0 {
		return 0
	}

	var mtimeCmp int
	switch {
	case localMtime < remoteMtime:
		mtimeCmp = -1
	case localMtime > remoteMtime:
		mtimeCmp = 1
	}

	hashCmp := cmpStr(localHash, remoteHash)

	if hashCmp == 0 {
		return 3 + mtimeCmp
	}

	// Tiebreaker when mtimes are equal and hashes differ:
	// Use hash comparison, but deletion marker "-" always wins
	if mtimeCmp == 0 {
		if localHash == "-" {
			return 5 // Push local deletion
		}
		if remoteHash == "-" {
			return 1 // Pull remote deletion
		}
	}

	if mtimeCmp < 0 || (mtimeCmp == 0 && hashCmp < 0) {
		return 1
	}
	return 5
}

func cmpStr(a, b string) int {
	switch {
	case a < b:
		return -1
	case a > b:
		return 1
	default:
		return 0
	}
}