Function System

pkg/iostreams/iostreams.go:478–523

()

}

func System() *IOStreams {
	terminal := ghTerm.FromEnv()

	var stdout fileWriter = os.Stdout
	// On Windows with no virtual terminal processing support, translate ANSI escape
	// sequences to console syscalls.
	if colorableStdout := colorable.NewColorable(os.Stdout); colorableStdout != os.Stdout {
		// Ensure that the file descriptor of the original stdout is preserved.
		stdout = &fdWriter{
			fd:     os.Stdout.Fd(),
			Writer: colorableStdout,
		}
	}

	var stderr fileWriter = os.Stderr
	// On Windows with no virtual terminal processing support, translate ANSI escape
	// sequences to console syscalls.
	if colorableStderr := colorable.NewColorable(os.Stderr); colorableStderr != os.Stderr {
		// Ensure that the file descriptor of the original stderr is preserved.
		stderr = &fdWriter{
			fd:     os.Stderr.Fd(),
			Writer: colorableStderr,
		}
	}

	io := &IOStreams{
		In:           os.Stdin,
		Out:          stdout,
		ErrOut:       stderr,
		pagerCommand: os.Getenv("PAGER"),
		term:         &terminal,
	}

	stdoutIsTTY := io.IsStdoutTTY()
	stderrIsTTY := io.IsStderrTTY()

	if stdoutIsTTY && stderrIsTTY {
		io.progressIndicatorEnabled = true
	}

	if stdoutIsTTY && hasAlternateScreenBuffer(terminal.IsTrueColorSupported()) {
		io.alternateScreenBufferEnabled = true
	}

	return io
}

type fakeTerm struct{}