Add delall command to asynqmon CLI

tools/asynqmon/cmd/delall.go

@@ -0,0 +1,65 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/go-redis/redis/v7"
+	"github.com/hibiken/asynq/internal/rdb"
+	"github.com/spf13/cobra"
+)
+
+var delallValidArgs = []string{"scheduled", "retry", "dead"}
+
+// delallCmd represents the delall command
+var delallCmd = &cobra.Command{
+	Use:   "delall [queue name]",
+	Short: "Deletes all tasks from the specified queue",
+	Long: `Delall (asynqmon delall) will delete all tasks from the specified queue.
+
+The argument should be one of "scheduled", "retry", or "dead".
+
+Example: asynqmon delall dead -> Deletes all tasks from the dead queue`,
+	ValidArgs: delallValidArgs,
+	Args:      cobra.ExactValidArgs(1),
+	Run:       delall,
+}
+
+func init() {
+	rootCmd.AddCommand(delallCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// delallCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// delallCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+
+func delall(cmd *cobra.Command, args []string) {
+	c := redis.NewClient(&redis.Options{
+		Addr: uri,
+		DB:   db,
+	})
+	r := rdb.NewRDB(c)
+	var err error
+	switch args[0] {
+	case "scheduled":
+		err = r.DeleteAllScheduledTasks()
+	case "retry":
+		err = r.DeleteAllRetryTasks()
+	case "dead":
+		err = r.DeleteAllDeadTasks()
+	default:
+		fmt.Printf("error: `asynqmon delall [queue name]` only accepts %v as the argument.\n", delallValidArgs)
+		os.Exit(1)
+	}
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	fmt.Printf("Deleted all tasks from %q queue\n", args[0])
+}