Exit 1 when a deletion prompt is not confirmed (closes #423)

prune, snapshot purge, snapshot remove and database delete exited 0 when their confirmation prompt was declined or left unanswered, so a script could not tell that nothing was deleted. They now end with "deletion not confirmed" and exit 1. The [y/N] prompts accept y or Y; database delete still asks for yes.

Model: opus-5-5

internal/vaultik/prune.go

@@ -267,7 +267,7 @@ func (v *Vaultik) PruneBlobs(opts *PruneOptions) error {
 
 	if !v.confirmPrune(opts, len(unreferencedBlobs), totalSize,
 		dirsWithoutManifest) {
-		return nil
+		return ErrNotConfirmed
 	}
 
 	v.deleteUnreferencedBlobs(unreferencedBlobs, allBlobs, result)

internal/vaultik/prune_metadata_dir_test.go

@@ -176,7 +176,8 @@ func TestPruneDeclinedKeepsMetadataDirWithoutManifest(t *testing.T) {
 
 	env.v.Stdin = strings.NewReader("n\n")
 
-	require.NoError(t, env.v.PruneBlobs(&vaultik.PruneOptions{}))
+	require.ErrorIs(t, env.v.PruneBlobs(&vaultik.PruneOptions{}),
+		vaultik.ErrNotConfirmed)
 
 	assert.True(t, env.store.hasKey(leftDB),
 		"a declined prune must keep the directory")

internal/vaultik/remove_quiet_test.go

@@ -54,9 +54,10 @@ func TestPurgeSnapshots_QuietPromptListsSnapshots(t *testing.T) {
 	v.UI.SetQuiet(true)
 
 	// Stdin is empty, so the prompt reads no answer and cancels.
-	require.NoError(t, v.PurgeSnapshotsWithOptions(&vaultik.SnapshotPurgeOptions{
+	err := 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]")
@@ -77,7 +78,8 @@ func TestPruneBlobs_QuietPromptShowsBlobTotal(t *testing.T) {
 	addBlob(t, env.store.testStorer, testBlobHashA)
 
 	// Stdin is empty, so the prompt reads no answer and cancels.
-	require.NoError(t, env.v.PruneBlobs(&vaultik.PruneOptions{}))
+	require.ErrorIs(t, env.v.PruneBlobs(&vaultik.PruneOptions{}),
+		vaultik.ErrNotConfirmed)
 
 	assert.Contains(t, env.stdout.String(),
 		"Found 1 unreferenced blob(s) totaling")

internal/vaultik/remove_snapshot_test.go

@@ -337,6 +337,27 @@ 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()

internal/vaultik/snapshot.go

@@ -881,17 +881,12 @@ func (v *Vaultik) confirmAndExecutePurge(
 
 		var confirm string
 
+		// A failure to read the answer means no confirmation.
 		_, err := v.scanStdin(&confirm)
-		if err != nil {
+		if err != nil || strings.ToLower(confirm) != "y" {
 			v.printlnStdout("Cancelled")
 
-			return nil //nolint:nilerr // treat EOF or read error as "no"
-		}
-
-		if strings.ToLower(confirm) != "y" {
-			v.printlnStdout("Cancelled")
-
-			return nil
+			return ErrNotConfirmed
 		}
 	} else if !quiet {
 		v.UI.Infof("The following snapshots will be deleted:")
@@ -1490,7 +1485,7 @@ func (v *Vaultik) RemoveSnapshot(
 	}
 
 	if !v.confirmRemoveSnapshot(snapshotID, opts) {
-		return result, nil
+		return result, ErrNotConfirmed
 	}
 
 	// Checked before the local record is deleted: it may be the last

internal/vaultik/snapshot_list_test.go

@@ -362,8 +362,9 @@ 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.NoError(t, env.v.PurgeSnapshotsWithOptions(
-		&vaultik.SnapshotPurgeOptions{OlderThan: "1d"}))
+	require.ErrorIs(t, env.v.PurgeSnapshotsWithOptions(
+		&vaultik.SnapshotPurgeOptions{OlderThan: "1d"}),
+		vaultik.ErrNotConfirmed)
 	assert.Contains(t, findTableRow(t, env.stdout.String(), listLocalID),
 		wantSize, "snapshot purge")
 }

internal/vaultik/vaultik.go

@@ -5,6 +5,7 @@ package vaultik
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -184,6 +185,12 @@ 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...)