feat: concurrent manifest downloads in ListSnapshots

Replace serial getManifestSize() calls with bounded concurrent downloads
using errgroup. For each remote snapshot not in the local DB, manifest
downloads now run in parallel (up to 10 concurrent) instead of one at a
time.

Changes:
- Use errgroup with SetLimit(10) for bounded concurrency
- Collect remote-only snapshot IDs first, pre-add entries with zero size
- Download manifests concurrently, patch sizes from results
- Remove now-unused getManifestSize helper (logic inlined into goroutines)
- Promote golang.org/x/sync from indirect to direct dependency

closes #8

README.md

@@ -150,7 +150,7 @@ passphrase is needed or stored locally.
 vaultik [--config <path>] snapshot create [snapshot-names...] [--cron] [--daemon] [--prune]
 vaultik [--config <path>] snapshot list [--json]
 vaultik [--config <path>] snapshot verify <snapshot-id> [--deep]
-vaultik [--config <path>] snapshot purge [--keep-latest | --older-than <duration>] [--name <name>] [--force]
+vaultik [--config <path>] snapshot purge [--keep-latest | --older-than <duration>] [--force]
 vaultik [--config <path>] snapshot remove <snapshot-id> [--dry-run] [--force]
 vaultik [--config <path>] snapshot prune
 vaultik [--config <path>] restore <snapshot-id> <target-dir> [paths...]
@@ -180,9 +180,8 @@ vaultik [--config <path>] store info
 * `--deep`: Download and verify blob contents (not just existence)
 
 **snapshot purge**: Remove old snapshots based on criteria
-* `--keep-latest`: Keep the most recent snapshot per snapshot name
+* `--keep-latest`: Keep only the most recent snapshot
 * `--older-than`: Remove snapshots older than duration (e.g., 30d, 6mo, 1y)
-* `--name`: Filter purge to a specific snapshot name
 * `--force`: Skip confirmation prompt
 
 **snapshot remove**: Remove a specific snapshot

go.mod

@@ -24,6 +24,7 @@ require (
 	github.com/spf13/cobra v1.10.1
 	github.com/stretchr/testify v1.11.1
 	go.uber.org/fx v1.24.0
+	golang.org/x/sync v0.18.0
 	golang.org/x/term v0.37.0
 	gopkg.in/yaml.v3 v3.0.1
 	modernc.org/sqlite v1.38.0
@@ -266,7 +267,6 @@ require (
 	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
 	golang.org/x/net v0.47.0 // indirect
 	golang.org/x/oauth2 v0.33.0 // indirect
-	golang.org/x/sync v0.18.0 // indirect
 	golang.org/x/sys v0.38.0 // indirect
 	golang.org/x/text v0.31.0 // indirect
 	golang.org/x/time v0.14.0 // indirect

internal/cli/purge.go

@@ -11,9 +11,16 @@ import (
 	"go.uber.org/fx"
 )
 
+// PurgeOptions contains options for the purge command
+type PurgeOptions struct {
+	KeepLatest bool
+	OlderThan  string
+	Force      bool
+}
+
 // NewPurgeCommand creates the purge command
 func NewPurgeCommand() *cobra.Command {
-	opts := &vaultik.SnapshotPurgeOptions{}
+	opts := &PurgeOptions{}
 
 	cmd := &cobra.Command{
 		Use:   "purge",
@@ -21,15 +28,8 @@ func NewPurgeCommand() *cobra.Command {
 		Long: `Removes snapshots based on age or count criteria.
 
 This command allows you to:
-- Keep only the latest snapshot per name (--keep-latest)
+- Keep only the latest snapshot (--keep-latest)
 - Remove snapshots older than a specific duration (--older-than)
-- Filter to a specific snapshot name (--name)
-
-When --keep-latest is used, retention is applied per snapshot name. For example,
-if you have snapshots named "home" and "system", --keep-latest keeps the most
-recent of each.
-
-Use --name to restrict the purge to a single snapshot name.
 
 Config is located at /etc/vaultik/config.yml by default, but can be overridden by 
 specifying a path using --config or by setting VAULTIK_CONFIG to a path.`,
@@ -66,7 +66,7 @@ specifying a path using --config or by setting VAULTIK_CONFIG to a path.`,
 								// Start the purge operation in a goroutine
 								go func() {
 									// Run the purge operation
-									if err := v.PurgeSnapshotsWithOptions(opts); err != nil {
+									if err := v.PurgeSnapshots(opts.KeepLatest, opts.OlderThan, opts.Force); err != nil {
 										if err != context.Canceled {
 											log.Error("Purge operation failed", "error", err)
 											os.Exit(1)
@@ -92,10 +92,9 @@ specifying a path using --config or by setting VAULTIK_CONFIG to a path.`,
 		},
 	}
 
-	cmd.Flags().BoolVar(&opts.KeepLatest, "keep-latest", false, "Keep only the latest snapshot per name")
+	cmd.Flags().BoolVar(&opts.KeepLatest, "keep-latest", false, "Keep only the latest snapshot")
 	cmd.Flags().StringVar(&opts.OlderThan, "older-than", "", "Remove snapshots older than duration (e.g. 30d, 6m, 1y)")
 	cmd.Flags().BoolVar(&opts.Force, "force", false, "Skip confirmation prompts")
-	cmd.Flags().StringVar(&opts.Name, "name", "", "Filter purge to a specific snapshot name")
 
 	return cmd
 }

internal/cli/snapshot.go

@@ -167,25 +167,21 @@ func newSnapshotListCommand() *cobra.Command {
 
 // newSnapshotPurgeCommand creates the 'snapshot purge' subcommand
 func newSnapshotPurgeCommand() *cobra.Command {
-	opts := &vaultik.SnapshotPurgeOptions{}
+	var keepLatest bool
+	var olderThan string
+	var force bool
 
 	cmd := &cobra.Command{
 		Use:   "purge",
 		Short: "Purge old snapshots",
-		Long: `Removes snapshots based on age or count criteria.
+		Long:  "Removes snapshots based on age or count criteria",
-
-When --keep-latest is used, retention is applied per snapshot name. For example,
-if you have snapshots named "home" and "system", --keep-latest keeps the most
-recent of each.
-
-Use --name to restrict the purge to a single snapshot name.`,
 		Args:  cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			// Validate flags
-			if !opts.KeepLatest && opts.OlderThan == "" {
+			if !keepLatest && olderThan == "" {
 				return fmt.Errorf("must specify either --keep-latest or --older-than")
 			}
-			if opts.KeepLatest && opts.OlderThan != "" {
+			if keepLatest && olderThan != "" {
 				return fmt.Errorf("cannot specify both --keep-latest and --older-than")
 			}
 
@@ -209,7 +205,7 @@ Use --name to restrict the purge to a single snapshot name.`,
 						lc.Append(fx.Hook{
 							OnStart: func(ctx context.Context) error {
 								go func() {
-									if err := v.PurgeSnapshotsWithOptions(opts); err != nil {
+									if err := v.PurgeSnapshots(keepLatest, olderThan, force); err != nil {
 										if err != context.Canceled {
 											log.Error("Failed to purge snapshots", "error", err)
 											os.Exit(1)
@@ -232,10 +228,9 @@ Use --name to restrict the purge to a single snapshot name.`,
 		},
 	}
 
-	cmd.Flags().BoolVar(&opts.KeepLatest, "keep-latest", false, "Keep only the latest snapshot per name")
+	cmd.Flags().BoolVar(&keepLatest, "keep-latest", false, "Keep only the latest snapshot")
-	cmd.Flags().StringVar(&opts.OlderThan, "older-than", "", "Remove snapshots older than duration (e.g., 30d, 6m, 1y)")
+	cmd.Flags().StringVar(&olderThan, "older-than", "", "Remove snapshots older than duration (e.g., 30d, 6m, 1y)")
-	cmd.Flags().BoolVar(&opts.Force, "force", false, "Skip confirmation prompt")
+	cmd.Flags().BoolVar(&force, "force", false, "Skip confirmation prompt")
-	cmd.Flags().StringVar(&opts.Name, "name", "", "Filter purge to a specific snapshot name")
 
 	return cmd
 }

internal/vaultik/helpers.go

@@ -79,21 +79,6 @@ func parseSnapshotTimestamp(snapshotID string) (time.Time, error) {
 	return timestamp.UTC(), nil
 }
 
-// parseSnapshotName extracts the snapshot name from a snapshot ID.
-// Format: hostname_snapshotname_timestamp (3 parts) or hostname_timestamp (2 parts, no name).
-// Returns the snapshot name, or empty string if no name component is present.
-func parseSnapshotName(snapshotID string) string {
-	parts := strings.Split(snapshotID, "_")
-	if len(parts) < 3 {
-		// Format: hostname_timestamp — no snapshot name
-		return ""
-	}
-	// Format: hostname_name_timestamp — middle parts are the name.
-	// The last part is the RFC3339 timestamp, the first part is the hostname,
-	// everything in between is the snapshot name (which may itself contain underscores).
-	return strings.Join(parts[1:len(parts)-1], "_")
-}
-
 // parseDuration parses a duration string with support for days
 func parseDuration(s string) (time.Duration, error) {
 	// Check for days suffix

internal/vaultik/helpers_test.go

@@ -1,119 +0,0 @@
-package vaultik
-
-import (
-	"testing"
-)
-
-func TestParseSnapshotName(t *testing.T) {
-	tests := []struct {
-		name       string
-		snapshotID string
-		want       string
-	}{
-		{
-			name:       "standard format with name",
-			snapshotID: "myhost_home_2026-01-12T14:41:15Z",
-			want:       "home",
-		},
-		{
-			name:       "standard format with different name",
-			snapshotID: "server1_system_2026-02-15T09:30:00Z",
-			want:       "system",
-		},
-		{
-			name:       "no snapshot name (legacy format)",
-			snapshotID: "myhost_2026-01-12T14:41:15Z",
-			want:       "",
-		},
-		{
-			name:       "name with underscores",
-			snapshotID: "myhost_my_special_backup_2026-03-01T00:00:00Z",
-			want:       "my_special_backup",
-		},
-		{
-			name:       "single part (edge case)",
-			snapshotID: "nounderscore",
-			want:       "",
-		},
-		{
-			name:       "empty string",
-			snapshotID: "",
-			want:       "",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got := parseSnapshotName(tt.snapshotID)
-			if got != tt.want {
-				t.Errorf("parseSnapshotName(%q) = %q, want %q", tt.snapshotID, got, tt.want)
-			}
-		})
-	}
-}
-
-func TestParseSnapshotTimestamp(t *testing.T) {
-	tests := []struct {
-		name       string
-		snapshotID string
-		wantErr    bool
-	}{
-		{
-			name:       "valid with name",
-			snapshotID: "myhost_home_2026-01-12T14:41:15Z",
-			wantErr:    false,
-		},
-		{
-			name:       "valid without name",
-			snapshotID: "myhost_2026-01-12T14:41:15Z",
-			wantErr:    false,
-		},
-		{
-			name:       "invalid - single part",
-			snapshotID: "nounderscore",
-			wantErr:    true,
-		},
-		{
-			name:       "invalid - bad timestamp",
-			snapshotID: "myhost_home_notadate",
-			wantErr:    true,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			_, err := parseSnapshotTimestamp(tt.snapshotID)
-			if (err != nil) != tt.wantErr {
-				t.Errorf("parseSnapshotTimestamp(%q) error = %v, wantErr %v", tt.snapshotID, err, tt.wantErr)
-			}
-		})
-	}
-}
-
-func TestSnapshotPurgeOptions(t *testing.T) {
-	opts := &SnapshotPurgeOptions{
-		KeepLatest: true,
-		Name:       "home",
-		Force:      true,
-	}
-	if !opts.KeepLatest {
-		t.Error("Expected KeepLatest to be true")
-	}
-	if opts.Name != "home" {
-		t.Errorf("Expected Name to be 'home', got %q", opts.Name)
-	}
-	if !opts.Force {
-		t.Error("Expected Force to be true")
-	}
-
-	opts2 := &SnapshotPurgeOptions{
-		OlderThan: "30d",
-		Name:      "system",
-	}
-	if opts2.OlderThan != "30d" {
-		t.Errorf("Expected OlderThan to be '30d', got %q", opts2.OlderThan)
-	}
-	if opts2.Name != "system" {
-		t.Errorf("Expected Name to be 'system', got %q", opts2.Name)
-	}
-}

internal/vaultik/purge_per_name_test.go

@@ -1,303 +0,0 @@
-package vaultik_test
-
-import (
-	"bytes"
-	"context"
-	"database/sql"
-	"strings"
-	"testing"
-	"time"
-
-	"git.eeqj.de/sneak/vaultik/internal/database"
-	"git.eeqj.de/sneak/vaultik/internal/log"
-	"git.eeqj.de/sneak/vaultik/internal/types"
-	"git.eeqj.de/sneak/vaultik/internal/vaultik"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-// setupPurgeTest creates a Vaultik instance with an in-memory database and mock
-// storage pre-populated with the given snapshot IDs. Each snapshot is marked as
-// completed. Remote metadata stubs are created so syncWithRemote keeps them.
-func setupPurgeTest(t *testing.T, snapshotIDs []string) *vaultik.Vaultik {
-	t.Helper()
-	log.Initialize(log.Config{})
-
-	ctx := context.Background()
-	db, err := database.New(ctx, ":memory:")
-	require.NoError(t, err)
-	t.Cleanup(func() { _ = db.Close() })
-
-	repos := database.NewRepositories(db)
-	mockStorage := NewMockStorer()
-
-	// Insert each snapshot into the DB and create remote metadata stubs.
-	// Use timestamps parsed from snapshot IDs for realistic ordering.
-	for _, id := range snapshotIDs {
-		// Parse timestamp from the snapshot ID
-		parts := strings.Split(id, "_")
-		timestampStr := parts[len(parts)-1]
-		startedAt, err := time.Parse(time.RFC3339, timestampStr)
-		require.NoError(t, err, "parsing timestamp from snapshot ID %q", id)
-
-		completedAt := startedAt.Add(5 * time.Minute)
-		snap := &database.Snapshot{
-			ID:             types.SnapshotID(id),
-			Hostname:       "testhost",
-			VaultikVersion: "test",
-			StartedAt:      startedAt,
-			CompletedAt:    &completedAt,
-		}
-		err = repos.WithTx(ctx, func(ctx context.Context, tx *sql.Tx) error {
-			return repos.Snapshots.Create(ctx, tx, snap)
-		})
-		require.NoError(t, err, "creating snapshot %s", id)
-
-		// Create remote metadata stub so syncWithRemote keeps it
-		metadataKey := "metadata/" + id + "/manifest.json.zst"
-		err = mockStorage.Put(ctx, metadataKey, strings.NewReader("stub"))
-		require.NoError(t, err)
-	}
-
-	stdout := &bytes.Buffer{}
-	stderr := &bytes.Buffer{}
-	stdin := &bytes.Buffer{}
-
-	v := &vaultik.Vaultik{
-		Storage:      mockStorage,
-		Repositories: repos,
-		DB:           db,
-		Stdout:       stdout,
-		Stderr:       stderr,
-		Stdin:        stdin,
-	}
-	v.SetContext(ctx)
-
-	return v
-}
-
-// listRemainingSnapshots returns IDs of all completed snapshots in the database.
-func listRemainingSnapshots(t *testing.T, v *vaultik.Vaultik) []string {
-	t.Helper()
-	ctx := context.Background()
-	dbSnaps, err := v.Repositories.Snapshots.ListRecent(ctx, 10000)
-	require.NoError(t, err)
-
-	var ids []string
-	for _, s := range dbSnaps {
-		if s.CompletedAt != nil {
-			ids = append(ids, s.ID.String())
-		}
-	}
-	return ids
-}
-
-func TestPurgeKeepLatest_PerName(t *testing.T) {
-	// Create snapshots for two different names: "home" and "system".
-	// With per-name --keep-latest, the latest of each should be kept.
-	snapshotIDs := []string{
-		"testhost_system_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T01:00:00Z",
-		"testhost_system_2026-01-01T02:00:00Z",
-		"testhost_home_2026-01-01T03:00:00Z",
-		"testhost_system_2026-01-01T04:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-
-	// Should keep the latest of each name
-	assert.Len(t, remaining, 2, "should keep exactly 2 snapshots (one per name)")
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T04:00:00Z", "should keep latest system")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T03:00:00Z", "should keep latest home")
-}
-
-func TestPurgeKeepLatest_SingleName(t *testing.T) {
-	// All snapshots have the same name — keep-latest should keep exactly one.
-	snapshotIDs := []string{
-		"testhost_home_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T01:00:00Z",
-		"testhost_home_2026-01-01T02:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-	assert.Len(t, remaining, 1)
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T02:00:00Z", "should keep the newest")
-}
-
-func TestPurgeKeepLatest_WithNameFilter(t *testing.T) {
-	// Use --name to filter purge to only "home" snapshots.
-	// "system" snapshots should be untouched.
-	snapshotIDs := []string{
-		"testhost_system_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T01:00:00Z",
-		"testhost_system_2026-01-01T02:00:00Z",
-		"testhost_home_2026-01-01T03:00:00Z",
-		"testhost_home_2026-01-01T04:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-		Name:       "home",
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-
-	// 2 system snapshots untouched + 1 latest home = 3
-	assert.Len(t, remaining, 3)
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T00:00:00Z")
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T02:00:00Z")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T04:00:00Z")
-}
-
-func TestPurgeKeepLatest_NoSnapshots(t *testing.T) {
-	v := setupPurgeTest(t, nil)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-}
-
-func TestPurgeKeepLatest_NameFilterNoMatch(t *testing.T) {
-	snapshotIDs := []string{
-		"testhost_system_2026-01-01T00:00:00Z",
-		"testhost_system_2026-01-01T01:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-		Name:       "nonexistent",
-	})
-	require.NoError(t, err)
-
-	// All snapshots should remain — the name filter matched nothing
-	remaining := listRemainingSnapshots(t, v)
-	assert.Len(t, remaining, 2)
-}
-
-func TestPurgeOlderThan_WithNameFilter(t *testing.T) {
-	// Snapshots with different names and timestamps.
-	// --older-than should apply only to the named subset when --name is used.
-	snapshotIDs := []string{
-		"testhost_system_2020-01-01T00:00:00Z",
-		"testhost_home_2020-01-01T00:00:00Z",
-		"testhost_system_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T00:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	// Purge only "home" snapshots older than 365 days
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		OlderThan: "365d",
-		Force:     true,
-		Name:      "home",
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-
-	// Old system stays (not filtered by name), old home deleted, recent ones stay
-	assert.Len(t, remaining, 3)
-	assert.Contains(t, remaining, "testhost_system_2020-01-01T00:00:00Z")
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T00:00:00Z")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T00:00:00Z")
-}
-
-func TestPurgeKeepLatest_LegacyNoNameSnapshots(t *testing.T) {
-	// Legacy snapshots without a name component (hostname_timestamp).
-	// Should be grouped together under empty-name.
-	snapshotIDs := []string{
-		"testhost_2026-01-01T00:00:00Z",
-		"testhost_2026-01-01T01:00:00Z",
-		"testhost_2026-01-01T02:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-	assert.Len(t, remaining, 1)
-	assert.Contains(t, remaining, "testhost_2026-01-01T02:00:00Z")
-}
-
-func TestPurgeKeepLatest_MixedNamedAndLegacy(t *testing.T) {
-	// Mix of named snapshots and legacy ones (no name).
-	snapshotIDs := []string{
-		"testhost_2026-01-01T00:00:00Z",
-		"testhost_home_2026-01-01T01:00:00Z",
-		"testhost_2026-01-01T02:00:00Z",
-		"testhost_home_2026-01-01T03:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-
-	// Should keep latest of each group: latest legacy + latest home
-	assert.Len(t, remaining, 2)
-	assert.Contains(t, remaining, "testhost_2026-01-01T02:00:00Z")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T03:00:00Z")
-}
-
-func TestPurgeKeepLatest_ThreeNames(t *testing.T) {
-	// Three different snapshot names with multiple snapshots each.
-	snapshotIDs := []string{
-		"testhost_home_2026-01-01T00:00:00Z",
-		"testhost_system_2026-01-01T01:00:00Z",
-		"testhost_media_2026-01-01T02:00:00Z",
-		"testhost_home_2026-01-01T03:00:00Z",
-		"testhost_system_2026-01-01T04:00:00Z",
-		"testhost_media_2026-01-01T05:00:00Z",
-		"testhost_home_2026-01-01T06:00:00Z",
-	}
-
-	v := setupPurgeTest(t, snapshotIDs)
-
-	err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
-		KeepLatest: true,
-		Force:      true,
-	})
-	require.NoError(t, err)
-
-	remaining := listRemainingSnapshots(t, v)
-	assert.Len(t, remaining, 3, "should keep one per name")
-	assert.Contains(t, remaining, "testhost_home_2026-01-01T06:00:00Z")
-	assert.Contains(t, remaining, "testhost_system_2026-01-01T04:00:00Z")
-	assert.Contains(t, remaining, "testhost_media_2026-01-01T05:00:00Z")
-}

internal/vaultik/snapshot.go

@@ -8,6 +8,7 @@ import (
 	"regexp"
 	"sort"
 	"strings"
+	"sync"
 	"text/tabwriter"
 	"time"
 
@@ -16,6 +17,7 @@ import (
 	"git.eeqj.de/sneak/vaultik/internal/snapshot"
 	"git.eeqj.de/sneak/vaultik/internal/types"
 	"github.com/dustin/go-humanize"
+	"golang.org/x/sync/errgroup"
 )
 
 // SnapshotCreateOptions contains options for the snapshot create command
@@ -438,6 +440,9 @@ func (v *Vaultik) reconcileLocalWithRemote(remoteSnapshots map[string]bool) (map
 func (v *Vaultik) buildSnapshotInfoList(remoteSnapshots map[string]bool, localSnapshotMap map[string]*database.Snapshot) ([]SnapshotInfo, error) {
 	snapshots := make([]SnapshotInfo, 0, len(remoteSnapshots))
 
+	// remoteOnly collects snapshot IDs that need a manifest download.
+	var remoteOnly []string
+
 	for snapshotID := range remoteSnapshots {
 		if localSnap, exists := localSnapshotMap[snapshotID]; exists && localSnap.CompletedAt != nil {
 			totalSize, err := v.Repositories.Snapshots.GetSnapshotTotalCompressedSize(v.ctx, snapshotID)
@@ -458,16 +463,73 @@ func (v *Vaultik) buildSnapshotInfoList(remoteSnapshots map[string]bool, localSn
 				continue
 			}
 
-			totalSize, err := v.getManifestSize(snapshotID)
+			// Pre-add with zero size; will be filled by concurrent downloads.
-			if err != nil {
-				return nil, fmt.Errorf("failed to get manifest size for %s: %w", snapshotID, err)
-			}
-
 			snapshots = append(snapshots, SnapshotInfo{
 				ID:             types.SnapshotID(snapshotID),
 				Timestamp:      timestamp,
-				CompressedSize: totalSize,
+				CompressedSize: 0,
 			})
+			remoteOnly = append(remoteOnly, snapshotID)
+		}
+	}
+
+	// Download manifests concurrently for remote-only snapshots.
+	if len(remoteOnly) > 0 {
+		// maxConcurrentManifestDownloads bounds parallel manifest fetches to
+		// avoid overwhelming the S3 endpoint while still being much faster
+		// than serial downloads.
+		const maxConcurrentManifestDownloads = 10
+
+		type manifestResult struct {
+			snapshotID string
+			size       int64
+		}
+
+		var (
+			mu      sync.Mutex
+			results []manifestResult
+		)
+
+		g, gctx := errgroup.WithContext(v.ctx)
+		g.SetLimit(maxConcurrentManifestDownloads)
+
+		for _, sid := range remoteOnly {
+			g.Go(func() error {
+				manifestPath := fmt.Sprintf("metadata/%s/manifest.json.zst", sid)
+				reader, err := v.Storage.Get(gctx, manifestPath)
+				if err != nil {
+					return fmt.Errorf("downloading manifest for %s: %w", sid, err)
+				}
+				defer func() { _ = reader.Close() }()
+
+				manifest, err := snapshot.DecodeManifest(reader)
+				if err != nil {
+					return fmt.Errorf("decoding manifest for %s: %w", sid, err)
+				}
+
+				mu.Lock()
+				results = append(results, manifestResult{
+					snapshotID: sid,
+					size:       manifest.TotalCompressedSize,
+				})
+				mu.Unlock()
+				return nil
+			})
+		}
+
+		if err := g.Wait(); err != nil {
+			return nil, fmt.Errorf("fetching manifest sizes: %w", err)
+		}
+
+		// Build a lookup from results and patch the pre-added entries.
+		sizeMap := make(map[string]int64, len(results))
+		for _, r := range results {
+			sizeMap[r.snapshotID] = r.size
+		}
+		for i := range snapshots {
+			if sz, ok := sizeMap[string(snapshots[i].ID)]; ok {
+				snapshots[i].CompressedSize = sz
+			}
 		}
 	}
 
@@ -520,30 +582,8 @@ func (v *Vaultik) printSnapshotTable(snapshots []SnapshotInfo) error {
 	return w.Flush()
 }
 
-// SnapshotPurgeOptions contains options for the snapshot purge command
+// PurgeSnapshots removes old snapshots based on criteria
-type SnapshotPurgeOptions struct {
-	KeepLatest bool
-	OlderThan  string
-	Force      bool
-	Name       string // Filter purge to a specific snapshot name
-}
-
-// PurgeSnapshots removes old snapshots based on criteria.
-// When keepLatest is true, retention is applied per snapshot name — the latest
-// snapshot for each distinct name is kept.
 func (v *Vaultik) PurgeSnapshots(keepLatest bool, olderThan string, force bool) error {
-	return v.PurgeSnapshotsWithOptions(&SnapshotPurgeOptions{
-		KeepLatest: keepLatest,
-		OlderThan:  olderThan,
-		Force:      force,
-	})
-}
-
-// PurgeSnapshotsWithOptions removes old snapshots based on criteria with full options.
-// When KeepLatest is true, retention is applied per snapshot name — the latest
-// snapshot for each distinct name is kept. If Name is non-empty, only snapshots
-// matching that name are considered for purge.
-func (v *Vaultik) PurgeSnapshotsWithOptions(opts *SnapshotPurgeOptions) error {
 	// Sync with remote first
 	if err := v.syncWithRemote(); err != nil {
 		return fmt.Errorf("syncing with remote: %w", err)
@@ -567,51 +607,14 @@ func (v *Vaultik) PurgeSnapshotsWithOptions(opts *SnapshotPurgeOptions) error {
 		}
 	}
 
-	// If --name is specified, filter to only snapshots matching that name
-	if opts.Name != "" {
-		filtered := make([]SnapshotInfo, 0, len(snapshots))
-		for _, snap := range snapshots {
-			if parseSnapshotName(snap.ID.String()) == opts.Name {
-				filtered = append(filtered, snap)
-			}
-		}
-		snapshots = filtered
-	}
-
 	// Sort by timestamp (newest first)
 	sort.Slice(snapshots, func(i, j int) bool {
 		return snapshots[i].Timestamp.After(snapshots[j].Timestamp)
 	})
 
-	var toDelete []SnapshotInfo
+	toDelete, err := v.collectSnapshotsToPurge(snapshots, keepLatest, olderThan)
-
-	if opts.KeepLatest {
-		// Keep the latest snapshot per snapshot name
-		// Group snapshots by name, then mark all but the newest in each group
-		latestByName := make(map[string]bool) // tracks whether we've seen the latest for each name
-		for _, snap := range snapshots {
-			name := parseSnapshotName(snap.ID.String())
-			if latestByName[name] {
-				// Already kept the latest for this name — delete this one
-				toDelete = append(toDelete, snap)
-			} else {
-				// This is the latest (sorted newest-first) — keep it
-				latestByName[name] = true
-			}
-		}
-	} else if opts.OlderThan != "" {
-		// Parse duration
-		duration, err := parseDuration(opts.OlderThan)
 	if err != nil {
-			return fmt.Errorf("invalid duration: %w", err)
+		return err
-		}
-
-		cutoff := time.Now().UTC().Add(-duration)
-		for _, snap := range snapshots {
-			if snap.Timestamp.Before(cutoff) {
-				toDelete = append(toDelete, snap)
-			}
-		}
 	}
 
 	if len(toDelete) == 0 {
@@ -619,7 +622,37 @@ func (v *Vaultik) PurgeSnapshotsWithOptions(opts *SnapshotPurgeOptions) error {
 		return nil
 	}
 
-	return v.confirmAndExecutePurge(toDelete, opts.Force)
+	return v.confirmAndExecutePurge(toDelete, force)
+}
+
+// collectSnapshotsToPurge determines which snapshots to delete based on retention criteria
+func (v *Vaultik) collectSnapshotsToPurge(snapshots []SnapshotInfo, keepLatest bool, olderThan string) ([]SnapshotInfo, error) {
+	if keepLatest {
+		// Keep only the most recent snapshot
+		if len(snapshots) > 1 {
+			return snapshots[1:], nil
+		}
+		return nil, nil
+	}
+
+	if olderThan != "" {
+		// Parse duration
+		duration, err := parseDuration(olderThan)
+		if err != nil {
+			return nil, fmt.Errorf("invalid duration: %w", err)
+		}
+
+		cutoff := time.Now().UTC().Add(-duration)
+		var toDelete []SnapshotInfo
+		for _, snap := range snapshots {
+			if snap.Timestamp.Before(cutoff) {
+				toDelete = append(toDelete, snap)
+			}
+		}
+		return toDelete, nil
+	}
+
+	return nil, nil
 }
 
 // confirmAndExecutePurge shows deletion candidates, confirms with user, and deletes snapshots
@@ -817,23 +850,6 @@ func (v *Vaultik) outputVerifyJSON(result *VerifyResult) error {
 
 // Helper methods that were previously on SnapshotApp
 
-func (v *Vaultik) getManifestSize(snapshotID string) (int64, error) {
-	manifestPath := fmt.Sprintf("metadata/%s/manifest.json.zst", snapshotID)
-
-	reader, err := v.Storage.Get(v.ctx, manifestPath)
-	if err != nil {
-		return 0, fmt.Errorf("downloading manifest: %w", err)
-	}
-	defer func() { _ = reader.Close() }()
-
-	manifest, err := snapshot.DecodeManifest(reader)
-	if err != nil {
-		return 0, fmt.Errorf("decoding manifest: %w", err)
-	}
-
-	return manifest.TotalCompressedSize, nil
-}
-
 func (v *Vaultik) downloadManifest(snapshotID string) (*snapshot.Manifest, error) {
 	manifestPath := fmt.Sprintf("metadata/%s/manifest.json.zst", snapshotID)