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// Copyright 2019-2025 The Wait4X Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !disable_redis
// Package cmd provides the command-line interface for the Wait4X application.
package cmd
import (
"errors"
"fmt"
"github.com/go-logr/logr"
"github.com/spf13/cobra"
"wait4x.dev/v3/checker"
"wait4x.dev/v3/checker/redis"
"wait4x.dev/v3/internal/contextutil"
"wait4x.dev/v3/waiter"
)
// NewRedisCommand creates a new redis sub-command
func NewRedisCommand() *cobra.Command {
redisCommand := &cobra.Command{
Use: "redis ADDRESS... [flags] [-- command [args...]]",
Short: "Check Redis connection or key existence",
Args: func(_ *cobra.Command, args []string) error {
if len(args) < 1 {
return errors.New("ADDRESS is required argument for the redis command")
}
return nil
},
Example: `
# Checking Redis connection
wait4x redis redis://127.0.0.1:6379
# Specify username, password and db
wait4x redis redis://user:password@localhost:6379/1
# Checking Redis connection over unix socket
wait4x redis unix://user:password@/path/to/redis.sock?db=1
# Checking a key existence
wait4x redis redis://127.0.0.1:6379 --expect-key FOO
# Checking a key existence and matching the value
wait4x redis redis://127.0.0.1:6379 --expect-key "FOO=^b[A-Z]r$"
`,
RunE: runRedis,
}
redisCommand.Flags().Duration("connection-timeout", redis.DefaultConnectionTimeout, "Dial timeout for establishing new connections.")
redisCommand.Flags().String("expect-key", "", "Checking key existence.")
return redisCommand
}
// runRedis runs the redis command
func runRedis(cmd *cobra.Command, args []string) error {
conTimeout, err := cmd.Flags().GetDuration("connection-timeout")
if err != nil {
return fmt.Errorf("failed to parse --connection-timeout flag: %w", err)
}
expectKey, err := cmd.Flags().GetString("expect-key")
if err != nil {
return fmt.Errorf("failed to parse --expect-key flag: %w", err)
}
logger, err := logr.FromContext(cmd.Context())
if err != nil {
return fmt.Errorf("failed to get logger from context: %w", err)
}
// ArgsLenAtDash returns -1 when -- was not specified
if i := cmd.ArgsLenAtDash(); i != -1 {
args = args[:i]
}
checkers := make([]checker.Checker, len(args))
for i, arg := range args {
checkers[i] = redis.New(
arg,
redis.WithExpectKey(expectKey),
redis.WithTimeout(conTimeout),
)
}
return waiter.WaitParallelContext(
cmd.Context(),
checkers,
waiter.WithTimeout(contextutil.GetTimeout(cmd.Context())),
waiter.WithInterval(contextutil.GetInterval(cmd.Context())),
waiter.WithInvertCheck(contextutil.GetInvertCheck(cmd.Context())),
waiter.WithBackoffPolicy(contextutil.GetBackoffPolicy(cmd.Context())),
waiter.WithBackoffCoefficient(contextutil.GetBackoffCoefficient(cmd.Context())),
waiter.WithBackoffExponentialMaxInterval(contextutil.GetBackoffExponentialMaxInterval(cmd.Context())),
waiter.WithLogger(logger),
)
}
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