Function wrapDockerExec

agent/agentcontainers/containers_dockercli.go:207–214

wrapDockerExec is a helper function that wraps the given command and arguments with a docker exec command that runs as the given user in the given container. This is used to fetch information about a container prior to running the actual command.

(containerName, userName, cmd string, args ...string)

// container. This is used to fetch information about a container prior to
// running the actual command.
func wrapDockerExec(containerName, userName, cmd string, args ...string) (string, []string) {
	dockerArgs := []string{"exec", "--interactive"}
	if userName != "" {
		dockerArgs = append(dockerArgs, "--user", userName)
	}
	dockerArgs = append(dockerArgs, containerName, cmd)
	return "docker", append(dockerArgs, args...)
}

// Helper function to run a command and return its stdout and stderr.
// We want to differentiate stdout and stderr instead of using CombinedOutput.