Artifact [8a828cb610]

Artifact 8a828cb6103dee875fca2acf3ff6fee46035c790f7eec3e943b3f722c7518e53:

• File internal/search/trunk.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: 1915) [annotate] [blame] [check-ins using]

package search

import (
	"database/sql"
	"fmt"
	"strconv"

	libfossil "github.com/danmestas/libfossil/internal/fsltype"
	"github.com/danmestas/libfossil/db"
)

// trunkTip returns the RID of the latest checkin on trunk.
// Returns 0 if no trunk tip exists (empty repo).
func trunkTip(q db.Querier) (libfossil.FslID, error) {
	if q == nil {
		panic("search.trunkTip: nil Querier")
	}

	var rid int64
	err := q.QueryRow(`
		SELECT tagxref.rid
		FROM tagxref
		JOIN tag USING(tagid)
		WHERE tag.tagname = 'sym-trunk' AND tagxref.tagtype > 0
		ORDER BY tagxref.mtime DESC
		LIMIT 1
	`).Scan(&rid)
	if err == sql.ErrNoRows {
		return 0, nil
	}
	if err != nil {
		return 0, fmt.Errorf("trunkTip: %w", err)
	}
	if rid <= 0 {
		panic("search.trunkTip: postcondition: rid must be positive when row found")
	}

	return libfossil.FslID(rid), nil
}

// indexedRID returns the RID stored in fts_meta, or 0 if not set.
func indexedRID(q db.Querier) (libfossil.FslID, error) {
	var val string
	err := q.QueryRow(
		"SELECT value FROM fts_meta WHERE key = 'indexed_rid'",
	).Scan(&val)
	if err == sql.ErrNoRows {
		return 0, nil
	}
	if err != nil {
		return 0, fmt.Errorf("indexedRID: %w", err)
	}
	rid, err := strconv.ParseInt(val, 10, 64)
	if err != nil {
		return 0, fmt.Errorf("indexedRID parse: %w", err)
	}
	return libfossil.FslID(rid), nil
}

// NeedsReindex returns true if the trunk tip has advanced past the indexed checkin.
// Returns false if the repo has no trunk tip (empty repo).
func (idx *Index) NeedsReindex() (bool, error) {
	if idx == nil {
		panic("search.NeedsReindex: nil *Index")
	}

	tip, err := trunkTip(idx.repo.DB())
	if err != nil {
		return false, fmt.Errorf("search.NeedsReindex: %w", err)
	}
	if tip == 0 {
		return false, nil // empty repo
	}

	current, err := indexedRID(idx.repo.DB())
	if err != nil {
		return false, fmt.Errorf("search.NeedsReindex: %w", err)
	}

	return tip != current, nil
}