Author SHA1 Message Date
sneak 8dee0179d8 Honor NO_COLOR in the terminal log handler (closes #402)
check / check (push) Successful in 10m43s
The TTY log handler always wrote ANSI color, unlike internal/ui, which
disables color when NO_COLOR is set. Add a color flag to TTYHandler,
set from NO_COLOR with the same test internal/ui uses, and route every
color code through a paint helper that returns plain text when color is
off. The README's color sentence now covers log lines too.

Model: deepseek-v4-pro (implementation); opus-5-5 (rebase)
2026-11-10 22:25:49 +00:00
16 changed files with 1331 additions and 239 deletions

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+2 -1
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@@ -831,7 +831,8 @@ Work planned after 1.0. Loosely ordered by priority.
Every command's user-facing output is governed by `internal/ui`, in one of two
ways. Color is enabled when the stream written to is a TTY and the `NO_COLOR`
environment variable is unset (https://no-color.org/).
environment variable is unset (https://no-color.org/). The same rule governs the
colorized log lines `internal/log` writes to a terminal.
- **Status, progress, warnings, and errors** go through the `internal/ui`
message methods below: marker-prefixed, colored on a TTY, and — except
+1205 -3
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+3 -4
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@@ -7,7 +7,6 @@ import (
"github.com/spf13/cobra"
"sneak.berlin/go/vaultik/internal/config"
"sneak.berlin/go/vaultik/internal/log"
"sneak.berlin/go/vaultik/internal/vaultik"
)
// NewDatabaseCommand creates the database command group
@@ -91,12 +90,12 @@ Use --force to skip the confirmation prompt.`,
var confirm string
// A failure to read the answer means no confirmation.
_, err = fmt.Fscanln(cmd.InOrStdin(), &confirm)
_, err = fmt.Scanln(&confirm)
if err != nil || confirm != "yes" {
_, _ = fmt.Fprintln(w, "Aborted.")
return vaultik.ErrNotConfirmed
//nolint:nilerr // a failed/aborted confirmation is a clean abort
return nil
}
}
-48
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@@ -1,48 +0,0 @@
package cli //nolint:testpackage // sets the unexported rootFlags directly
import (
"bytes"
"errors"
"io"
"os"
"strings"
"testing"
"sneak.berlin/go/vaultik/internal/vaultik"
)
// TestDatabaseDeleteDeclinedIsError checks that answering anything but
// "yes" keeps the database and returns ErrNotConfirmed, so the command
// exits non-zero.
//
//nolint:paralleltest // mutates the process-global rootFlags
func TestDatabaseDeleteDeclinedIsError(t *testing.T) {
dir := t.TempDir()
dbPath, cfgPath := seedDatabaseDeleteConfig(t, dir)
setRootFlags(t, RootFlags{ConfigPath: cfgPath})
var out bytes.Buffer
cmd := newDatabaseDeleteCommand()
cmd.SetOut(&out)
cmd.SetErr(io.Discard)
cmd.SetIn(strings.NewReader("no\n"))
cmd.SetArgs(nil)
err := cmd.Execute()
if !errors.Is(err, vaultik.ErrNotConfirmed) {
t.Errorf("declined database delete returned %v, want %v",
err, vaultik.ErrNotConfirmed)
}
_, err = os.Stat(dbPath)
if err != nil {
t.Errorf("declined database delete removed the file: %v", err)
}
if !strings.Contains(out.String(), "Aborted.") {
t.Errorf("declined database delete printed %q, want Aborted.",
out.String())
}
}
+32 -11
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@@ -5,6 +5,7 @@ import (
"fmt"
"io"
"log/slog"
"os"
"strconv"
"strings"
"sync"
@@ -60,6 +61,12 @@ type TTYHandler struct {
mu *sync.Mutex
out io.Writer
// color reports whether records are written with ANSI color. It is
// false when NO_COLOR is set, matching internal/ui's shouldColor
// test; the caller already chose this handler for a terminal, so
// TTY-ness is not re-checked here.
color bool
// attrs are the attributes accumulated through WithAttrs, emitted
// ahead of each record's own attributes. Their keys already carry
// the group path that was open when they were added, so no
@@ -72,16 +79,19 @@ type TTYHandler struct {
groups []string
}
// NewTTYHandler creates a new TTY handler with colored output.
// NewTTYHandler creates a new TTY handler. Color is enabled unless the
// NO_COLOR environment variable is set to a non-empty value, the same
// test internal/ui applies to status lines.
func NewTTYHandler(out io.Writer, opts *slog.HandlerOptions) *TTYHandler {
if opts == nil {
opts = &slog.HandlerOptions{}
}
return &TTYHandler{
out: out,
opts: *opts,
mu: &sync.Mutex{},
out: out,
opts: *opts,
mu: &sync.Mutex{},
color: os.Getenv("NO_COLOR") == "",
}
}
@@ -124,10 +134,10 @@ func (h *TTYHandler) Handle(_ context.Context, r slog.Record) error {
// are written around it: it can carry text from an untrusted source
// (a storage error, for one), and a raw control character would
// otherwise reach the terminal.
_, _ = fmt.Fprintf(h.out, "%s%s%s %s%s%s %s%s%s",
colorGray, timestamp, colorReset,
levelColor, level, colorReset,
colorBold, sanitize(r.Message), colorReset)
_, _ = fmt.Fprintf(h.out, "%s %s %s",
h.paint(colorGray, timestamp),
h.paint(levelColor, level),
h.paint(colorBold, sanitize(r.Message)))
// Attributes carried by the handler come first, then the record's
// own. Handler attributes were qualified when they were added; the
@@ -236,6 +246,7 @@ func (h *TTYHandler) clone() *TTYHandler {
opts: h.opts,
mu: h.mu,
out: h.out,
color: h.color,
attrs: make([]slog.Attr, len(h.attrs), len(h.attrs)+1),
groups: make([]string, len(h.groups), len(h.groups)+1),
}
@@ -273,9 +284,19 @@ func (h *TTYHandler) writeAttr(a slog.Attr) {
// the snapshot database — so a control character in one of them must
// be rendered as an escape sequence rather than reaching the terminal,
// where it could move the cursor or inject its own colours.
_, _ = fmt.Fprintf(h.out, " %s%s%s=%s%s%s",
colorCyan, sanitize(a.Key), colorReset,
colorBlue, sanitize(value), colorReset)
_, _ = fmt.Fprintf(h.out, " %s=%s",
h.paint(colorCyan, sanitize(a.Key)),
h.paint(colorBlue, sanitize(value)))
}
// paint wraps s in the given ANSI color when color is enabled, and
// returns s unchanged otherwise.
func (h *TTYHandler) paint(color, s string) string {
if !h.color {
return s
}
return color + s + colorReset
}
// sanitize returns s unchanged when every rune in it is printable, and a
+41
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@@ -421,3 +421,44 @@ func TestTTYHandlerEmptyGroupAndAttrsAreNoOps(t *testing.T) {
assert.Contains(t, plain, "kept=yes")
assert.NotContains(t, plain, " =")
}
// TestTTYHandlerRespectsNoColor checks that only a non-empty NO_COLOR
// turns color off, matching internal/ui's shouldColor test. The handler
// is only ever chosen for a terminal, so this is the one remaining
// condition that can still leave color in log output.
func TestTTYHandlerRespectsNoColor(t *testing.T) {
cases := []struct {
name string
noColor string
colored bool
}{
{
name: "NO_COLOR turns color off",
noColor: "1",
},
{
name: "empty NO_COLOR keeps color on",
noColor: "",
colored: true,
},
}
for _, testCase := range cases {
t.Run(testCase.name, func(t *testing.T) {
t.Setenv("NO_COLOR", testCase.noColor)
var buf bytes.Buffer
logger := slog.New(log.NewTTYHandler(&buf, debugHandlerOptions()))
logger.Info("hello", "key", "value")
if testCase.colored {
assert.Contains(t, buf.String(), "\x1b[",
"an empty NO_COLOR must leave ANSI color in log output")
} else {
assert.NotContains(t, buf.String(), "\x1b[",
"NO_COLOR must suppress every ANSI escape in log output")
}
})
}
}
+11 -83
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@@ -7,7 +7,6 @@ import (
"os"
"path/filepath"
"strings"
"sync"
"testing"
"github.com/spf13/afero"
@@ -25,28 +24,19 @@ import (
// that is not plugged in, cannot be listed. It is not an empty store, so
// no command may conclude from it that the local snapshots are gone.
// newFileDestinationVaultik writes the fault source tree and returns a
// Vaultik that backs it up to a file:// destination at storeDir.
// newFileDestinationVaultik returns a Vaultik that backs up the
// snapshot named "first" to a file:// destination at storeDir.
func newFileDestinationVaultik(
ctx context.Context, t *testing.T, storeDir string,
) (*vaultik.Vaultik, *database.Repositories) {
t.Helper()
osFs := afero.NewOsFs()
tempDir := t.TempDir()
dataDir := filepath.Join(tempDir, "src")
writeFaultSourceTree(t, afero.NewOsFs(), dataDir)
dbPath := filepath.Join(tempDir, "index.sqlite")
return openFileDestinationVaultik(ctx, t, storeDir, dataDir,
filepath.Join(tempDir, "index.sqlite"))
}
// openFileDestinationVaultik returns a Vaultik that backs up dataDir to a
// file:// destination at storeDir, with its local index at dbPath. The
// index is closed when the test ends.
func openFileDestinationVaultik(
ctx context.Context, t *testing.T, storeDir, dataDir, dbPath string,
) (*vaultik.Vaultik, *database.Repositories) {
t.Helper()
writeFaultSourceTree(t, osFs, dataDir)
store, err := storage.NewFileStorer(storeDir)
require.NoError(t, err)
@@ -58,84 +48,22 @@ func openFileDestinationVaultik(
repos := database.NewRepositories(db)
cfg := changedFileConfig(dataDir, dbPath)
return newBackupVaultik(ctx, cfg, store, repos, db, afero.NewOsFs()), repos
}
// firstBackup is one backup of the snapshot named "first" to a file://
// destination. dir holds its source tree in src, its store in store and
// its closed local index in index/index.sqlite. The first test that
// needs it makes it, and TestMain removes it. Every test that copies it
// backs up the same source tree, so no test may change that tree.
//
//nolint:gochecknoglobals // made once and shared by the tests that copy it
var firstBackup struct {
once sync.Once
dir string
ready bool
}
// TestMain removes firstBackup once every test has run.
func TestMain(m *testing.M) {
code := m.Run()
_ = os.RemoveAll(firstBackup.dir)
os.Exit(code)
}
// makeFirstBackup writes the fault source tree and backs it up as the
// snapshot named "first", all in a new directory that it records in
// firstBackup.
func makeFirstBackup(ctx context.Context, t *testing.T) {
t.Helper()
dir, err := os.MkdirTemp("", "vaultik-first-backup-")
require.NoError(t, err)
firstBackup.dir = dir
storeDir := filepath.Join(dir, "store")
dataDir := filepath.Join(dir, "src")
indexDir := filepath.Join(dir, "index")
require.NoError(t, os.Mkdir(storeDir, 0o750))
require.NoError(t, os.Mkdir(indexDir, 0o750))
writeFaultSourceTree(t, afero.NewOsFs(), dataDir)
v, _ := openFileDestinationVaultik(ctx, t, storeDir, dataDir,
filepath.Join(indexDir, "index.sqlite"))
require.NoError(t, backUp(v, "first"))
require.NoError(t, v.DB.Close())
firstBackup.ready = true
return newBackupVaultik(ctx, cfg, store, repos, db, osFs), repos
}
// backUpToFileDestination creates the directory storeDir, as a user must
// before the first backup, and returns a Vaultik whose file://
// destination there holds a backup of the snapshot named "first". The
// store and the local index are copies of firstBackup's, which is faster
// than backing up in every test. The returned Vaultik backs up a source
// tree shared with every other caller, so no test may change that tree.
// Everything the returned Vaultik prints after the backup goes to the
// returned buffer.
// before the first backup, and backs up the snapshot named "first" to a
// file:// destination there. Everything the returned Vaultik prints
// after the backup goes to the returned buffer.
func backUpToFileDestination(
ctx context.Context, t *testing.T, storeDir string,
) (*vaultik.Vaultik, *database.Repositories, *bytes.Buffer) {
t.Helper()
firstBackup.once.Do(func() { makeFirstBackup(ctx, t) })
require.True(t, firstBackup.ready, "another test failed to make firstBackup")
require.NoError(t, os.MkdirAll(storeDir, 0o750))
require.NoError(t, os.CopyFS(storeDir,
os.DirFS(filepath.Join(firstBackup.dir, "store"))))
indexDir := t.TempDir()
require.NoError(t, os.CopyFS(indexDir,
os.DirFS(filepath.Join(firstBackup.dir, "index"))))
v, repos := openFileDestinationVaultik(ctx, t, storeDir,
filepath.Join(firstBackup.dir, "src"),
filepath.Join(indexDir, "index.sqlite"))
v, repos := newFileDestinationVaultik(ctx, t, storeDir)
require.NoError(t, backUp(v, "first"))
out := &bytes.Buffer{}
v.Stdout = out
+1 -1
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@@ -267,7 +267,7 @@ func (v *Vaultik) PruneBlobs(opts *PruneOptions) error {
if !v.confirmPrune(opts, len(unreferencedBlobs), totalSize,
dirsWithoutManifest) {
return ErrNotConfirmed
return nil
}
v.deleteUnreferencedBlobs(unreferencedBlobs, allBlobs, result)
+1 -2
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@@ -176,8 +176,7 @@ func TestPruneDeclinedKeepsMetadataDirWithoutManifest(t *testing.T) {
env.v.Stdin = strings.NewReader("n\n")
require.ErrorIs(t, env.v.PruneBlobs(&vaultik.PruneOptions{}),
vaultik.ErrNotConfirmed)
require.NoError(t, env.v.PruneBlobs(&vaultik.PruneOptions{}))
assert.True(t, env.store.hasKey(leftDB),
"a declined prune must keep the directory")
+3 -5
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@@ -54,10 +54,9 @@ func TestPurgeSnapshots_QuietPromptListsSnapshots(t *testing.T) {
v.UI.SetQuiet(true)
// Stdin is empty, so the prompt reads no answer and cancels.
err := v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
require.NoError(t, v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
KeepLatest: true,
})
require.ErrorIs(t, err, vaultik.ErrNotConfirmed)
}))
assert.Contains(t, out.String(), snapHomeT0)
assert.Contains(t, out.String(), "Delete 1 snapshot(s)? [y/N]")
@@ -78,8 +77,7 @@ func TestPruneBlobs_QuietPromptShowsBlobTotal(t *testing.T) {
addBlob(t, env.store.testStorer, testBlobHashA)
// Stdin is empty, so the prompt reads no answer and cancels.
require.ErrorIs(t, env.v.PruneBlobs(&vaultik.PruneOptions{}),
vaultik.ErrNotConfirmed)
require.NoError(t, env.v.PruneBlobs(&vaultik.PruneOptions{}))
assert.Contains(t, env.stdout.String(),
"Found 1 unreferenced blob(s) totaling")
-21
View File
@@ -337,27 +337,6 @@ func TestRemoveSnapshot_DefaultRemovesMetadataNotBlobs(t *testing.T) {
assert.Contains(t, out, "vaultik prune")
}
// TestRemoveSnapshot_DeclinedIsError checks that answering no to the
// prompt keeps the snapshot and returns ErrNotConfirmed, so the command
// exits non-zero.
func TestRemoveSnapshot_DeclinedIsError(t *testing.T) {
log.Initialize(log.Config{})
t.Parallel()
store := newTestStorer()
addManifest(t, store, "snapshot-001", nil)
tv := vaultik.NewForTesting(store)
tv.Repositories = newLocalIndex(t, "snapshot-001")
tv.Stdin.WriteString("n\n")
_, err := tv.RemoveSnapshot("snapshot-001", &vaultik.RemoveOptions{})
require.ErrorIs(t, err, vaultik.ErrNotConfirmed)
assert.True(t, store.hasKey(remoteKeyPath("snapshot-001")))
assert.Contains(t, tv.Stdout.String(), "Cancelled")
}
func TestRemoveSnapshot_DryRun(t *testing.T) {
log.Initialize(log.Config{})
t.Parallel()
+7 -7
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@@ -46,11 +46,11 @@ import (
// slice out a few KB — currently the dominant cost in restore.
//
// The test deliberately constructs an adversarial scenario: three
// blobs A/B/C of five 64 KiB chunks each, nine files distributed across
// them, and path-ordered names that interleave the blobs (a1, b1, c1,
// a2, b2, c2, …) so naive path-order processing would touch every blob
// before finishing any of them.
// localitySource is one 64 KiB fixture file used by the locality test.
// blobs A/B/C of ~6 MB each, nine files distributed across them, and
// path-ordered names that interleave the blobs (a1, b1, c1, a2, b2,
// c2, …) so naive path-order processing would touch every blob before
// finishing any of them.
// localitySource is one 1 MiB fixture file used by the locality test.
type localitySource struct {
path string
data []byte
@@ -65,10 +65,10 @@ type localityCopy struct {
// localitySourceBytes is the size of each source file of the locality
// fixture.
const localitySourceBytes = 64 * 1024
const localitySourceBytes = 1024 * 1024
// buildLocalityFixture writes the adversarial source layout described
// in TestRestoreLocalityAndReadAt: 15 sources of 64 KiB each (which the
// in TestRestoreLocalityAndReadAt: 15 sources of 1 MiB each (which the
// backup packs into 3 blobs of 5 chunks) plus 9 interleaved-name copies
// (3 per blob group).
func buildLocalityFixture(
@@ -27,10 +27,10 @@ import (
// TestRestoreSweeperEvictsBlobs exercises the reference-counted blob
// disk cache eviction during restore.
//
// The scenario: 30 unique 128 KiB random files plus 10 duplicates of
// those (40 files total, 3.75 MiB of unique content) get backed up with
// a 1 MiB blob_size_limit. After backup the snapshot's encrypted blobs
// are restored through Vaultik.Restore, and per-key Get counts on the
// The scenario: 30 unique 1 MB random files plus 10 duplicates of those
// (40 files total, 30 MB of unique content) get backed up with a 10 MB
// blob_size_limit. After backup the snapshot's encrypted blobs are
// restored through Vaultik.Restore, and per-key Get counts on the
// storage layer are recorded. Each blob in the snapshot MUST be
// downloaded exactly once — re-downloads would mean the sweeper either
// evicted a blob that was still needed (LRU regression) or that the
@@ -41,7 +41,7 @@ import (
// original AND every duplicate referencing its chunks have been
// restored.
// buildSweeperFixture writes the source layout for the sweeper test: 30
// unique 128 KiB random files plus 10 duplicates of a random subset. The
// unique 1 MB random files plus 10 duplicates of a random subset. The
// PRNG seed is fixed so failures are reproducible; the entropy is what
// matters here — the FastCDC chunker needs realistic-looking data to
// pick chunk boundaries naturally. Returns the expected content by
@@ -51,7 +51,7 @@ func buildSweeperFixture(
) map[string][]byte {
t.Helper()
const fileSize = 128 * 1024
const fileSize = 1 * 1024 * 1024
rng := rand.New(rand.NewSource(42)) //nolint:gosec // G404: fixture data only
@@ -159,7 +159,7 @@ func runSweeperBackup(
require.NoError(t, err)
require.Equal(t, uniqueFiles+duplicateFiles, scanResult.FilesScanned)
require.Greater(t, scanResult.BlobsCreated, 1,
"3.75 MiB of unique data at 1 MiB blob size should yield multiple blobs")
"30 MB of unique data at 10 MB blob size should yield multiple blobs")
require.NoError(t, sm.CompleteSnapshot(ctx, snapshotID))
require.NoError(t, sm.ExportSnapshotMetadata(ctx, dbPath, snapshotID))
@@ -199,8 +199,8 @@ func TestRestoreSweeperEvictsBlobs(t *testing.T) {
expected := buildSweeperFixture(t, fs, dataDir, uniqueFiles, duplicateFiles)
chunkSize := int64(16 * 1024)
maxBlobSize := int64(1024 * 1024)
chunkSize := int64(64 * 1024)
maxBlobSize := int64(10 * 1024 * 1024)
storer, err := storage.NewFileStorer(storeDir)
require.NoError(t, err)
+9 -4
View File
@@ -881,12 +881,17 @@ func (v *Vaultik) confirmAndExecutePurge(
var confirm string
// A failure to read the answer means no confirmation.
_, err := v.scanStdin(&confirm)
if err != nil || strings.ToLower(confirm) != "y" {
if err != nil {
v.printlnStdout("Cancelled")
return ErrNotConfirmed
return nil //nolint:nilerr // treat EOF or read error as "no"
}
if strings.ToLower(confirm) != "y" {
v.printlnStdout("Cancelled")
return nil
}
} else if !quiet {
v.UI.Infof("The following snapshots will be deleted:")
@@ -1485,7 +1490,7 @@ func (v *Vaultik) RemoveSnapshot(
}
if !v.confirmRemoveSnapshot(snapshotID, opts) {
return result, ErrNotConfirmed
return result, nil
}
// Checked before the local record is deleted: it may be the last
+7 -33
View File
@@ -187,17 +187,6 @@ func (e *listEnv) addRemoteRawTimestamp(
t.Helper()
remoteKey := snapshot.RemoteSnapshotKey(snapshotID)
e.putRemoteManifest(t, remoteKey,
encodeRemoteManifest(t, remoteKey, timestamp))
return remoteKey
}
// encodeRemoteManifest returns the encoded manifest of a one-blob
// snapshot whose remote key is remoteKey.
func encodeRemoteManifest(t *testing.T, remoteKey, timestamp string) []byte {
t.Helper()
manifest := &snapshot.Manifest{
// Note: the hashed key, never the human ID. That is precisely
// why a remote-only snapshot cannot be named.
@@ -213,17 +202,11 @@ func encodeRemoteManifest(t *testing.T, remoteKey, timestamp string) []byte {
data, err := snapshot.EncodeManifest(manifest, 3)
require.NoError(t, err)
return data
}
// putRemoteManifest stores an encoded manifest on the destination store
// under remoteKey.
func (e *listEnv) putRemoteManifest(t *testing.T, remoteKey string, data []byte) {
t.Helper()
err := e.store.Put(context.Background(),
err = e.store.Put(context.Background(),
"metadata/"+remoteKey+"/manifest.json.zst", bytes.NewReader(data))
require.NoError(t, err)
return remoteKey
}
// Fixtures shared across the listing tests.
@@ -362,9 +345,8 @@ func TestSnapshotListAndPurgePrintSizesLikeRemoteInfo(t *testing.T) {
// Without --force and with nothing on stdin the purge lists what it
// would delete, reads no confirmation, and deletes nothing.
env.stdout.Reset()
require.ErrorIs(t, env.v.PurgeSnapshotsWithOptions(
&vaultik.SnapshotPurgeOptions{OlderThan: "1d"}),
vaultik.ErrNotConfirmed)
require.NoError(t, env.v.PurgeSnapshotsWithOptions(
&vaultik.SnapshotPurgeOptions{OlderThan: "1d"}))
assert.Contains(t, findTableRow(t, env.stdout.String(), listLocalID),
wantSize, "snapshot purge")
}
@@ -809,17 +791,9 @@ func TestListSnapshots_JSONReportsTruncation(t *testing.T) {
timestamp := time.Date(2026, 3, 2, 11, 22, 33, 0, time.UTC)
// One past the cap, so exactly one snapshot is omitted. The listing
// names a snapshot by the key its manifest is stored under, never by
// the manifest's own ID. So all of them share one encoded manifest:
// encoding 1001 took seconds.
data := encodeRemoteManifest(t,
snapshot.RemoteSnapshotKey("otherhost_bulk"),
timestamp.Format(time.RFC3339))
// One past the cap, so exactly one snapshot is omitted.
for i := range maxRemoteOnlyRowsForTest + 1 {
env.putRemoteManifest(t, snapshot.RemoteSnapshotKey(
fmt.Sprintf("otherhost_bulk_%04d", i)), data)
env.addRemote(t, fmt.Sprintf("otherhost_bulk_%04d", i), timestamp)
}
stderr := captureProcessStderr(t, func() {
-7
View File
@@ -5,7 +5,6 @@ package vaultik
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"os"
@@ -185,12 +184,6 @@ func (v *Vaultik) printlnStdout(args ...any) {
_, _ = fmt.Fprintln(v.Stdout, args...)
}
// ErrNotConfirmed is returned when a confirmation prompt gets any answer
// but the one it asks for (`y` or `Y`, or `yes` for `database delete`), or
// stdin ends first. Nothing the prompt asked about is deleted, and the
// command exits non-zero.
var ErrNotConfirmed = errors.New("deletion not confirmed")
// scanStdin reads a line of input from stdin.
func (v *Vaultik) scanStdin(a ...any) (int, error) {
return fmt.Fscanln(v.Stdin, a...)