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Artifact [b835a7bef5]

Check-ins Using Download Hex

Artifact b835a7bef53881d0bb22149285c50dc1358a5f14aac067cd709f9a39e60b1d80:

package verify

import (
	"fmt"

	libfossil "github.com/danmestas/libfossil/internal/fsltype"
	"github.com/danmestas/libfossil/internal/blob"
	"github.com/danmestas/libfossil/internal/content"
	"github.com/danmestas/libfossil/db"
	"github.com/danmestas/libfossil/internal/deck"
	"github.com/danmestas/libfossil/internal/repo"
)

// rebuildManifests walks all non-phantom blobs, parses checkin manifests,
// and inserts event/plink/mlink/filename rows.
func rebuildManifests(r *repo.Repo, tx *db.Tx, report *Report) error {
	if r == nil {
		panic("rebuildManifests: nil *repo.Repo")
	}
	if tx == nil {
		panic("rebuildManifests: nil *db.Tx")
	}
	if report == nil {
		panic("rebuildManifests: nil *Report")
	}

	entries, err := collectBlobEntries(tx)
	if err != nil {
		return err
	}

	for _, e := range entries {
		data, err := content.Expand(tx, e.rid)
		if err != nil {
			report.BlobsSkipped++
			continue // not expandable — corrupt, raw data blob, or phantom
		}
		d, err := deck.Parse(data)
		if err != nil {
			continue // not a manifest — normal for file blobs
		}
		if d.Type != deck.Checkin {
			continue
		}
		if err := rebuildCheckin(tx, e.rid, d, report); err != nil {
			return fmt.Errorf("rebuildManifests rid=%d: %w", e.rid, err)
		}
	}
	return nil
}

// blobEntry holds a blob's rid and uuid for rebuild iteration.
type blobEntry struct {
	rid  libfossil.FslID
	uuid string
}

// collectBlobEntries reads all non-phantom blob rid/uuid pairs.
func collectBlobEntries(q db.Querier) ([]blobEntry, error) {
	rows, err := q.Query("SELECT rid, uuid FROM blob WHERE size >= 0")
	if err != nil {
		return nil, fmt.Errorf("collectBlobEntries: %w", err)
	}
	defer rows.Close()

	var entries []blobEntry
	for rows.Next() {
		var e blobEntry
		if err := rows.Scan(&e.rid, &e.uuid); err != nil {
			return nil, fmt.Errorf("collectBlobEntries scan: %w", err)
		}
		entries = append(entries, e)
	}
	return entries, rows.Err()
}

// rebuildCheckin inserts event, plink, and mlink rows for one checkin manifest.
func rebuildCheckin(tx *db.Tx, rid libfossil.FslID, d *deck.Deck, report *Report) error {
	if tx == nil {
		panic("rebuildCheckin: nil *db.Tx")
	}
	if d == nil {
		panic("rebuildCheckin: nil *deck.Deck")
	}

	mtime := libfossil.TimeToJulian(d.D)

	// Insert event row
	if _, err := tx.Exec(
		"INSERT OR IGNORE INTO event(type, mtime, objid, user, comment) VALUES('ci', ?, ?, ?, ?)",
		mtime, rid, d.U, d.C,
	); err != nil {
		return fmt.Errorf("event: %w", err)
	}

	// Insert plink rows for parent(s)
	if err := rebuildPlinks(tx, rid, d, mtime, report); err != nil {
		return err
	}

	// Insert mlink/filename rows for manifest F-cards.
	// Uses d.F directly (not expanded) — matches Fossil's mlink semantics.
	if err := rebuildMlinks(tx, rid, d); err != nil {
		return err
	}

	return nil
}

// rebuildPlinks inserts plink rows for each parent in the manifest.
func rebuildPlinks(tx *db.Tx, rid libfossil.FslID, d *deck.Deck, mtime float64, report *Report) error {
	for i, parentUUID := range d.P {
		parentRID, ok := blob.Exists(tx, parentUUID)
		if !ok {
			report.MissingRefs++
			report.addIssue(Issue{
				Kind:    IssueMissingReference,
				RID:     rid,
				UUID:    parentUUID,
				Table:   "plink",
				Message: fmt.Sprintf("rid=%d parent %s not found", rid, parentUUID),
			})
			continue
		}
		isPrim := 0
		if i == 0 {
			isPrim = 1
		}
		if _, err := tx.Exec(
			"INSERT OR IGNORE INTO plink(pid, cid, isprim, mtime) VALUES(?, ?, ?, ?)",
			parentRID, rid, isPrim, mtime,
		); err != nil {
			return fmt.Errorf("plink: %w", err)
		}
	}
	return nil
}

// rebuildMlinks inserts mlink and filename rows for files that are new or
// changed relative to the primary parent. Fossil's rebuild only creates mlink
// rows for files that differ from the parent checkin — unchanged files are
// skipped. This matches fossil rebuild behavior.
func rebuildMlinks(tx *db.Tx, rid libfossil.FslID, d *deck.Deck) error {
	// Build parent file map (name → uuid) for comparison.
	parentFiles := buildParentFileMap(tx, d)

	for _, f := range d.F {
		if f.UUID == "" {
			continue // deleted file in delta manifest
		}
		// Skip unchanged files — only create mlink for new or modified.
		if parentUUID, exists := parentFiles[f.Name]; exists && parentUUID == f.UUID {
			continue
		}
		fnid, err := rebuildEnsureFilename(tx, f.Name)
		if err != nil {
			return fmt.Errorf("filename %q: %w", f.Name, err)
		}
		fileRID, ok := blob.Exists(tx, f.UUID)
		if !ok {
			continue // file blob missing — phantom or not yet received
		}
		if _, err := tx.Exec(
			"INSERT OR IGNORE INTO mlink(mid, fid, fnid) VALUES(?, ?, ?)",
			rid, fileRID, fnid,
		); err != nil {
			return fmt.Errorf("mlink: %w", err)
		}
	}
	return nil
}

// buildParentFileMap returns a map of filename→UUID from the primary parent's
// manifest. Returns an empty map if there is no parent (initial checkin).
func buildParentFileMap(tx *db.Tx, d *deck.Deck) map[string]string {
	if len(d.P) == 0 {
		return nil // initial checkin — no parent
	}
	parentRID, ok := content.AvailableByUUID(tx, d.P[0]) // primary parent
	if !ok {
		return nil
	}
	parentData, err := content.Expand(tx, parentRID)
	if err != nil {
		return nil
	}
	parentDeck, err := deck.Parse(parentData)
	if err != nil {
		return nil
	}
	m := make(map[string]string, len(parentDeck.F))
	for _, f := range parentDeck.F {
		m[f.Name] = f.UUID
	}
	return m
}

// rebuildEnsureFilename ensures a filename row exists and returns its fnid.
func rebuildEnsureFilename(tx *db.Tx, name string) (int64, error) {
	if tx == nil {
		panic("rebuildEnsureFilename: nil *db.Tx")
	}
	if name == "" {
		panic("rebuildEnsureFilename: empty name")
	}

	var fnid int64
	err := tx.QueryRow("SELECT fnid FROM filename WHERE name=?", name).Scan(&fnid)
	if err == nil {
		return fnid, nil
	}
	result, err := tx.Exec("INSERT INTO filename(name) VALUES(?)", name)
	if err != nil {
		return 0, fmt.Errorf("insert filename %q: %w", name, err)
	}
	return result.LastInsertId()
}