Refuse config keys that no setting has (closes #419)

config.Parse walks the file as written and fails on the first key that
matches no setting, naming its dotted path and line, so a typo in
exclude or prune_grace_period no longer falls back silently. Keys that a
${...} reference brings in are checked once smartconfig has filled it
in, and named without a line. YAML merge keys and a top-level env
section, which smartconfig reads, still load; an anchor that contains
itself is an error, and each anchored map is checked once per type.
config set refuses such a key before writing, with the same error, and
sets a key under env like any other value. The key-to-field lookup
moves from internal/cli to config.SettingType so both use it.

Model: opus-5-5

internal/cli/database.go

@@ -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
 				}
 			}
 

internal/cli/database_test.go

@@ -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())
-	}
-}

internal/vaultik/prune.go

@@ -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)

internal/vaultik/prune_metadata_dir_test.go

@@ -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")

internal/vaultik/remove_quiet_test.go

@@ -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")

internal/vaultik/remove_snapshot_test.go

@@ -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()

internal/vaultik/snapshot.go

@@ -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

internal/vaultik/snapshot_list_test.go

@@ -362,9 +362,8 @@ 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")
 }

internal/vaultik/vaultik.go

@@ -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...)