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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.
// 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"
"mvdan.cc/sh/v3/shell"
"wait4x.dev/v3/checker/exec"
"wait4x.dev/v3/internal/contextutil"
"wait4x.dev/v3/waiter"
)
// NewExecCommand creates a new exec sub-command
func NewExecCommand() *cobra.Command {
execCommand := &cobra.Command{
Use: "exec COMMAND [ARGS...] [flags]",
Short: "Check command execution",
Args: func(_ *cobra.Command, args []string) error {
if len(args) < 1 {
return errors.New("COMMAND is required argument for the exec command")
}
return nil
},
Example: `
# Wait for a command to exit with code 0
wait4x exec "ls /tmp"
# Wait for a command to exit with a specific code
wait4x exec "ls /nonexistent" --exit-code 2
# Enable exponential backoff retry
wait4x exec "bash ./some-script.sh" --exit-code 0 --backoff-policy exponential --backoff-exponential-max-interval 120s --timeout 120s`,
RunE: runExec,
}
execCommand.Flags().Int("exit-code", 0, "Expected exit code from the command")
return execCommand
}
// runExec runs the exec command
func runExec(cmd *cobra.Command, args []string) error {
exitCode, _ := cmd.Flags().GetInt("exit-code")
logger, err := logr.FromContext(cmd.Context())
if err != nil {
return err
}
if len(args) == 0 {
return fmt.Errorf("no command specified")
}
// Split the command into parts using shell parser
commandParts, err := shell.Fields(args[0], nil)
if err != nil {
return err
}
command := commandParts[0]
var commandArgs []string
if len(commandParts) > 1 {
commandArgs = append(commandArgs, commandParts[1:]...)
}
if len(args) > 1 {
commandArgs = append(commandArgs, args[1:]...)
}
checker := exec.New(command,
exec.WithArgs(commandArgs),
exec.WithExpectExitCode(exitCode),
)
return waiter.WaitContext(
cmd.Context(),
checker,
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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