fix: macOS backspace processing (#1379)

Revert "fix: Remove line length limit on MacOS for input prompts (#839)"

This reverts commit ccba2ba99d.

cli/cliui/cliui_darwin.go

@@ -1,31 +0,0 @@
-//go:build darwin
-// +build darwin
-
-package cliui
-
-import (
-	"golang.org/x/sys/unix"
-
-	"golang.org/x/xerrors"
-)
-
-func removeLineLengthLimit(inputFD int) (func(), error) {
-	termios, err := unix.IoctlGetTermios(inputFD, unix.TIOCGETA)
-	if err != nil {
-		return nil, xerrors.Errorf("get termios: %w", err)
-	}
-	newState := *termios
-	// MacOS has a default line limit of 1024. See:
-	// https://unix.stackexchange.com/questions/204815/terminal-does-not-accept-pasted-or-typed-lines-of-more-than-1024-characters
-	//
-	// This removes canonical input processing, so deletes will not function
-	// as expected. This _seems_ fine for most use-cases, but is unfortunate.
-	newState.Lflag &^= unix.ICANON
-	err = unix.IoctlSetTermios(inputFD, unix.TIOCSETA, &newState)
-	if err != nil {
-		return nil, xerrors.Errorf("set termios: %w", err)
-	}
-	return func() {
-		_ = unix.IoctlSetTermios(inputFD, unix.TIOCSETA, termios)
-	}, nil
-}

cli/cliui/cliui_other.go

@@ -1,10 +0,0 @@
-//go:build !darwin
-// +build !darwin
-
-package cliui
-
-import "golang.org/x/xerrors"
-
-func removeLineLengthLimit(_ int) (func(), error) {
-	return nil, xerrors.New("not implemented")
-}

cli/cliui/prompt.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
-	"runtime"
 	"strings"
 
 	"github.com/bgentry/speakeasy"
@@ -48,16 +47,6 @@ func Prompt(cmd *cobra.Command, opts PromptOptions) (string, error) {
 		if opts.Secret && isInputFile && isatty.IsTerminal(inFile.Fd()) {
 			line, err = speakeasy.Ask("")
 		} else {
-			if !opts.IsConfirm && runtime.GOOS == "darwin" && isInputFile {
-				var restore func()
-				restore, err = removeLineLengthLimit(int(inFile.Fd()))
-				if err != nil {
-					errCh <- err
-					return
-				}
-				defer restore()
-			}
-
 			reader := bufio.NewReader(cmd.InOrStdin())
 			line, err = reader.ReadString('\n')