Add del command to asynqmon CLI

tools/asynqmon/cmd/del.go

@@ -0,0 +1,67 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/go-redis/redis/v7"
+	"github.com/hibiken/asynq/internal/rdb"
+	"github.com/spf13/cobra"
+)
+
+// delCmd represents the del command
+var delCmd = &cobra.Command{
+	Use:   "del [task id]",
+	Short: "Deletes a task given an identifier",
+	Long: `Del (asynqmon del) will delete a task given an identifier.
+
+The command takes one argument which specifies the task to delete.
+The task should be in either scheduled, retry or dead queue.
+Identifier for a task should be obtained by running "asynqmon ls" command.
+
+Example: asynqmon enq d:1575732274:bnogo8gt6toe23vhef0g`,
+	Args: cobra.ExactArgs(1),
+	Run:  del,
+}
+
+func init() {
+	rootCmd.AddCommand(delCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// delCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// delCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+
+func del(cmd *cobra.Command, args []string) {
+	id, score, qtype, err := parseQueryID(args[0])
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	r := rdb.NewRDB(redis.NewClient(&redis.Options{
+		Addr: uri,
+		DB:   db,
+	}))
+	switch qtype {
+	case "s":
+		err = r.DeleteScheduledTask(id, score)
+	case "r":
+		err = r.DeleteRetryTask(id, score)
+	case "d":
+		err = r.DeleteDeadTask(id, score)
+	default:
+		fmt.Println("invalid argument")
+		os.Exit(1)
+	}
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	fmt.Printf("Successfully deleted %v\n", args[0])
+}