Function run

agent/agentcontainers/containers_dockercli.go:220–229

Helper function to run a command and return its stdout and stderr. We want to differentiate stdout and stderr instead of using CombinedOutput. We also want to differentiate between a command running successfully with output to stderr and a non-zero exit code.

(ctx context.Context, execer agentexec.Execer, cmd string, args ...string)

// We also want to differentiate between a command running successfully with
// output to stderr and a non-zero exit code.
func run(ctx context.Context, execer agentexec.Execer, cmd string, args ...string) (stdout, stderr string, err error) {
	var stdoutBuf, stderrBuf strings.Builder
	execCmd := execer.CommandContext(ctx, cmd, args...)
	execCmd.Stdout = &stdoutBuf
	execCmd.Stderr = &stderrBuf
	err = execCmd.Run()
	stdout = strings.TrimSpace(stdoutBuf.String())
	stderr = strings.TrimSpace(stderrBuf.String())
	return stdout, stderr, err
}

// dockerCLI is an implementation for Docker CLI that lists containers.
type dockerCLI struct {