132 lines
3.4 KiB
Go
132 lines
3.4 KiB
Go
/*
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Copyright © 2025 Lewis Wynne <lew@ily.rs>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package cmd
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import (
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"errors"
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"fmt"
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"strings"
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"github.com/dgraph-io/badger/v4"
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"github.com/spf13/cobra"
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)
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// delCmd represents the set command
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var delCmd = &cobra.Command{
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Use: "del KEY[@DB]",
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Short: "Delete a key. Optionally specify a db.",
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Aliases: []string{"delete", "rm", "remove"},
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Args: cobra.ExactArgs(1),
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RunE: del,
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SilenceUsage: true,
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}
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func del(cmd *cobra.Command, args []string) error {
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store := &Store{}
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force, err := cmd.Flags().GetBool("force")
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if err != nil {
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return err
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}
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exists, err := keyExists(store, args[0])
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if err != nil {
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return fmt.Errorf("cannot remove '%s': %v", args[0], err)
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}
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if !exists {
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return fmt.Errorf("cannot remove '%s': No such key", args[0])
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}
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targetKey, err := formatKeyForPrompt(store, args[0])
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if err != nil {
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return err
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}
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if !force {
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var confirm string
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message := fmt.Sprintf("remove %q: are you sure? (y/n)", targetKey)
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fmt.Println(message)
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if _, err := fmt.Scanln(&confirm); err != nil {
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return fmt.Errorf("cannot remove '%s': %v", args[0], err)
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}
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if strings.ToLower(confirm) != "y" {
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return nil
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}
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}
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trans := TransactionArgs{
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key: args[0],
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readonly: false,
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sync: false,
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transact: func(tx *badger.Txn, k []byte) error {
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if err := tx.Delete(k); errors.Is(err, badger.ErrKeyNotFound) {
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return fmt.Errorf("cannot remove '%s': No such key", args[0])
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}
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if err != nil {
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return fmt.Errorf("cannot remove '%s': %v", args[0], err)
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}
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return nil
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},
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}
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return store.Transaction(trans)
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}
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func init() {
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delCmd.Flags().BoolP("force", "f", false, "Force delete without confirmation")
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rootCmd.AddCommand(delCmd)
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}
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func keyExists(store *Store, arg string) (bool, error) {
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var notFound bool
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trans := TransactionArgs{
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key: arg,
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readonly: true,
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sync: false,
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transact: func(tx *badger.Txn, k []byte) error {
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if _, err := tx.Get(k); errors.Is(err, badger.ErrKeyNotFound) {
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notFound = true
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return nil
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} else {
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return err
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}
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},
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}
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if err := store.Transaction(trans); err != nil {
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return false, err
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}
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return !notFound, nil
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}
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func formatKeyForPrompt(store *Store, arg string) (string, error) {
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_, db, err := store.parse(arg, true)
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if err != nil {
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return "", err
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}
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if strings.Contains(arg, "@") {
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return arg, nil
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}
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if db == "" {
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return arg, nil
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}
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return fmt.Sprintf("%s@%s", arg, db), nil
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}
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