feat: add delete-stdin command

closes #18

cliphist.go

@@ -21,7 +21,7 @@ const bucketKey = "b"
 
 func main() {
  if len(os.Args) < 2 {
- log.Fatalf("please provide a command <store|list|decode|delete>")
+ log.Fatalf("please provide a command <store|list|decode|delete|delete-stdin>")
  }
  switch command := os.Args[1]; command {
  case "store":
@@ -43,6 +43,10 @@ func main() {
  if err := delete([]byte(os.Args[2])); err != nil {
  log.Fatalf("error deleting: %v", err)
  }
+ case "delete-stdin":
+ if err := deleteStdin(); err != nil {
+ log.Fatalf("error deleting: %v", err)
+ }
  default:
  log.Fatalf("unknown command %q", command)
  }
@@ -218,6 +222,47 @@ func delete(query []byte) error {
  return nil
 }
 
+func deleteStdin() error {
+ db, err := initDB(nil)
+ if err != nil {
+ return fmt.Errorf("creating db: %w", err)
+ }
+ defer db.Close()
+
+ input, err := io.ReadAll(os.Stdin)
+ if err != nil {
+ return fmt.Errorf("read stdin: %w", err)
+ }
+ if len(input) <= 2 {
+ return fmt.Errorf("input too short to decode")
+ }
+ matches := decodeID.FindSubmatch(input)
+ if len(matches) != 2 {
+ return fmt.Errorf("input not prefixed with id")
+ }
+ idStr := string(matches[1])
+ id, err := strconv.Atoi(idStr)
+ if err != nil {
+ return fmt.Errorf("converting id: %w", err)
+ }
+
+ tx, err := db.Begin(true)
+ if err != nil {
+ return fmt.Errorf("begin tx: %w", err)
+ }
+ defer tx.Rollback()
+
+ b := tx.Bucket([]byte(bucketKey))
+ if err := b.Delete(itob(uint64(id))); err != nil {
+ return fmt.Errorf("delete key: %w", err)
+ }
+
+ if err := tx.Commit(); err != nil {
+ return fmt.Errorf("commit tx: %w", err)
+ }
+ return nil
+}
+
 func initDB(opts *bolt.Options) (*bolt.DB, error) {
  userCacheDir, err := os.UserCacheDir()
  if err != nil {