backup: extract StdioWrapper from ProgressPrinters

The StdioWrapper is not used at all by the ProgressPrinters. It is
called a bit earlier than previously. However, as the password prompt
directly accessed stdin/stdout this doesn't cause problems.

cmd/restic/cmd_backup.go

@@ -25,6 +25,7 @@ import (
 	"github.com/restic/restic/internal/repository"
 	"github.com/restic/restic/internal/restic"
 	"github.com/restic/restic/internal/textfile"
+	"github.com/restic/restic/internal/ui"
 	"github.com/restic/restic/internal/ui/backup"
 	"github.com/restic/restic/internal/ui/termstatus"
 )
@@ -71,6 +72,14 @@ Exit status is 3 if some source data could not be read (incomplete snapshot crea
 			term.Run(cancelCtx)
 		}()
 
+		// use the terminal for stdout/stderr
+		prevStdout, prevStderr := globalOptions.stdout, globalOptions.stderr
+		defer func() {
+			globalOptions.stdout, globalOptions.stderr = prevStdout, prevStderr
+		}()
+		stdioWrapper := ui.NewStdioWrapper(term)
+		globalOptions.stdout, globalOptions.stderr = stdioWrapper.Stdout(), stdioWrapper.Stderr()
+
 		return runBackup(ctx, backupOptions, globalOptions, term, args)
 	},
 }
@@ -479,13 +488,6 @@ func runBackup(ctx context.Context, opts BackupOptions, gopts GlobalOptions, ter
 		repo.SetDryRun()
 	}
 
-	// use the terminal for stdout/stderr
-	prevStdout, prevStderr := gopts.stdout, gopts.stderr
-	defer func() {
-		gopts.stdout, gopts.stderr = prevStdout, prevStderr
-	}()
-	gopts.stdout, gopts.stderr = progressPrinter.Stdout(), progressPrinter.Stderr()
-
 	wg, wgCtx := errgroup.WithContext(ctx)
 	cancelCtx, cancel := context.WithCancel(wgCtx)
 	defer cancel()

internal/ui/backup/json.go

@@ -15,7 +15,6 @@ import (
 // JSONProgress reports progress for the `backup` command in JSON.
 type JSONProgress struct {
 	*ui.Message
-	*ui.StdioWrapper
 
 	term *termstatus.Terminal
 	v    uint
@@ -27,10 +26,9 @@ var _ ProgressPrinter = &JSONProgress{}
 // NewJSONProgress returns a new backup progress reporter.
 func NewJSONProgress(term *termstatus.Terminal, verbosity uint) *JSONProgress {
 	return &JSONProgress{
-		Message:      ui.NewMessage(term, verbosity),
-		StdioWrapper: ui.NewStdioWrapper(term),
-		term:         term,
-		v:            verbosity,
+		Message: ui.NewMessage(term, verbosity),
+		term:    term,
+		v:       verbosity,
 	}
 }
 

internal/ui/backup/progress.go

@@ -2,7 +2,6 @@ package backup
 
 import (
 	"context"
-	"io"
 	"sync"
 	"time"
 
@@ -22,10 +21,6 @@ type ProgressPrinter interface {
 	Finish(snapshotID restic.ID, start time.Time, summary *Summary, dryRun bool)
 	Reset()
 
-	// ui.StdioWrapper
-	Stdout() io.WriteCloser
-	Stderr() io.WriteCloser
-
 	P(msg string, args ...interface{})
 	V(msg string, args ...interface{})
 }

internal/ui/backup/progress_test.go

@@ -2,7 +2,6 @@ package backup
 
 import (
 	"context"
-	"io"
 	"sync"
 	"testing"
 	"time"
@@ -45,9 +44,6 @@ func (p *mockPrinter) Finish(id restic.ID, _ time.Time, summary *Summary, dryRun
 
 func (p *mockPrinter) Reset() {}
 
-func (p *mockPrinter) Stdout() io.WriteCloser { return nil }
-func (p *mockPrinter) Stderr() io.WriteCloser { return nil }
-
 func (p *mockPrinter) P(msg string, args ...interface{}) {}
 func (p *mockPrinter) V(msg string, args ...interface{}) {}
 

internal/ui/backup/text.go

@@ -14,7 +14,6 @@ import (
 // TextProgress reports progress for the `backup` command.
 type TextProgress struct {
 	*ui.Message
-	*ui.StdioWrapper
 
 	term *termstatus.Terminal
 }
@@ -25,9 +24,8 @@ var _ ProgressPrinter = &TextProgress{}
 // NewTextProgress returns a new backup progress reporter.
 func NewTextProgress(term *termstatus.Terminal, verbosity uint) *TextProgress {
 	return &TextProgress{
-		Message:      ui.NewMessage(term, verbosity),
-		StdioWrapper: ui.NewStdioWrapper(term),
-		term:         term,
+		Message: ui.NewMessage(term, verbosity),
+		term:    term,
 	}
 }