Artifact [f4abe35e55]

Artifact f4abe35e55403a111063d2bb5778f6293b104d15bacbdd066bac3eac4b7abd2d:

• File internal/deck/marshal.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: 3369) [annotate] [blame] [check-ins using]

package deck

import (
	"fmt"
	"sort"
	"strings"
)

func (d *Deck) Marshal() ([]byte, error) {
	if d == nil {
		panic("deck.Marshal: d must not be nil")
	}
	var b strings.Builder
	marshalCards(&b, d)
	body := b.String()
	zHash := computeZ([]byte(body))
	return []byte(fmt.Sprintf("%sZ %s\n", body, zHash)), nil
}

// marshalCards writes all cards in ASCII order to the builder.
func marshalCards(b *strings.Builder, d *Deck) {
	if b == nil {
		panic("deck.marshalCards: b must not be nil")
	}
	if d == nil {
		panic("deck.marshalCards: d must not be nil")
	}

	// Cards in strict ASCII order: A B C D E F G H I J K L M N P Q R T U W Z

	if d.A != nil {
		b.WriteString("A ")
		b.WriteString(FossilEncode(d.A.Filename))
		b.WriteString(" ")
		b.WriteString(d.A.Target)
		if d.A.Source != "" {
			b.WriteString(" ")
			b.WriteString(d.A.Source)
		}
		b.WriteString("\n")
	}

	if d.B != "" {
		fmt.Fprintf(b, "B %s\n", d.B)
	}

	if d.C != "" {
		fmt.Fprintf(b, "C %s\n", FossilEncode(d.C))
	}

	if !d.D.IsZero() {
		fmt.Fprintf(b, "D %s\n", d.D.UTC().Format("2006-01-02T15:04:05.000"))
	}

	if d.E != nil {
		fmt.Fprintf(b, "E %s %s\n", d.E.Date.UTC().Format("2006-01-02T15:04:05"), d.E.UUID)
	}

	if len(d.F) > 0 {
		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 })
		for _, f := range sorted {
			b.WriteString("F ")
			b.WriteString(FossilEncode(f.Name))
			if f.UUID != "" {
				b.WriteString(" ")
				b.WriteString(f.UUID)
				if f.Perm != "" {
					b.WriteString(" ")
					b.WriteString(f.Perm)
				}
			}
			if f.OldName != "" {
				b.WriteString(" ")
				b.WriteString(FossilEncode(f.OldName))
			}
			b.WriteString("\n")
		}
	}

	if d.G != "" {
		fmt.Fprintf(b, "G %s\n", d.G)
	}
	if d.H != "" {
		fmt.Fprintf(b, "H %s\n", FossilEncode(d.H))
	}
	if d.I != "" {
		fmt.Fprintf(b, "I %s\n", d.I)
	}

	for _, j := range d.J {
		if j.Value != "" {
			fmt.Fprintf(b, "J %s %s\n", FossilEncode(j.Name), j.Value)
		} else {
			fmt.Fprintf(b, "J %s\n", FossilEncode(j.Name))
		}
	}

	if d.K != "" {
		fmt.Fprintf(b, "K %s\n", d.K)
	}
	if d.L != "" {
		fmt.Fprintf(b, "L %s\n", FossilEncode(d.L))
	}

	if len(d.M) > 0 {
		sorted := make([]string, len(d.M))
		copy(sorted, d.M)
		sort.Strings(sorted)
		for _, m := range sorted {
			fmt.Fprintf(b, "M %s\n", m)
		}
	}

	if d.N != "" {
		fmt.Fprintf(b, "N %s\n", d.N)
	}

	if len(d.P) > 0 {
		fmt.Fprintf(b, "P %s\n", strings.Join(d.P, " "))
	}

	for _, q := range d.Q {
		prefix := "+"
		if q.IsBackout {
			prefix = "-"
		}
		if q.Baseline != "" {
			fmt.Fprintf(b, "Q %s%s %s\n", prefix, q.Target, q.Baseline)
		} else {
			fmt.Fprintf(b, "Q %s%s\n", prefix, q.Target)
		}
	}

	if d.R != "" {
		fmt.Fprintf(b, "R %s\n", d.R)
	}

	if len(d.T) > 0 {
		sorted := make([]TagCard, len(d.T))
		copy(sorted, d.T)
		sort.Slice(sorted, func(i, j int) bool {
			ki := string(sorted[i].Type) + sorted[i].Name + sorted[i].UUID
			kj := string(sorted[j].Type) + sorted[j].Name + sorted[j].UUID
			return ki < kj
		})
		for _, tag := range sorted {
			fmt.Fprintf(b, "T %c%s %s", tag.Type, tag.Name, tag.UUID)
			if tag.Value != "" {
				fmt.Fprintf(b, " %s", tag.Value)
			}
			b.WriteString("\n")
		}
	}

	if d.U != "" {
		fmt.Fprintf(b, "U %s\n", FossilEncode(d.U))
	}

	if len(d.W) > 0 {
		fmt.Fprintf(b, "W %d\n%s\n", len(d.W), d.W)
	}
}