Artifact [a7f9c1addc]

Artifact a7f9c1addcae6fd83474de2c971897eba5a787f4788973537deb13813d087268:

• File internal/deck/rcard.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: 727) [annotate] [blame] [check-ins using]

package deck

import (
	"crypto/md5"
	"encoding/hex"
	"fmt"
	"sort"
)

func (d *Deck) ComputeR(getContent func(uuid string) ([]byte, error)) (string, error) {
	if len(d.F) == 0 {
		return "d41d8cd98f00b204e9800998ecf8427e", nil
	}
	sorted := make([]FileCard, len(d.F))
	copy(sorted, d.F)
	sort.Slice(sorted, func(i, j int) bool { return sorted[i].Name < sorted[j].Name })

	h := md5.New()
	for _, f := range sorted {
		if f.UUID == "" {
			continue
		}
		content, err := getContent(f.UUID)
		if err != nil {
			return "", fmt.Errorf("ComputeR: fetching %q: %w", f.UUID, err)
		}
		h.Write([]byte(f.Name))
		h.Write([]byte(fmt.Sprintf(" %d\n", len(content))))
		h.Write(content)
	}
	return hex.EncodeToString(h.Sum(nil)), nil
}