replace globalOptions.stdout with termstatus.OutputWriter

cmd/restic/cmd_cache.go

@@ -161,7 +161,7 @@ func runCache(opts CacheOptions, gopts GlobalOptions, args []string, term ui.Ter
 		})
 	}
 
-	_ = tab.Write(gopts.stdout)
+	_ = tab.Write(gopts.term.OutputWriter())
 	printer.S("%d cache dirs in %s", len(dirs), cachedir)
 
 	return nil

cmd/restic/cmd_check_integration_test.go

@@ -23,15 +23,13 @@ func testRunCheckMustFail(t testing.TB, gopts GlobalOptions) {
 }
 
 func testRunCheckOutput(t testing.TB, gopts GlobalOptions, checkUnused bool) (string, error) {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			opts := CheckOptions{
-				ReadData:    true,
-				CheckUnused: checkUnused,
-			}
-			_, err := runCheck(context.TODO(), opts, gopts, nil, gopts.term)
-			return err
-		})
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
+		opts := CheckOptions{
+			ReadData:    true,
+			CheckUnused: checkUnused,
+		}
+		_, err := runCheck(context.TODO(), opts, gopts, nil, gopts.term)
+		return err
 	})
 	return buf.String(), err
 }

cmd/restic/cmd_debug.go

@@ -200,20 +200,20 @@ func runDebugDump(ctx context.Context, gopts GlobalOptions, args []string, term
 
 	switch tpe {
 	case "indexes":
-		return dumpIndexes(ctx, repo, gopts.stdout, printer)
+		return dumpIndexes(ctx, repo, gopts.term.OutputWriter(), printer)
 	case "snapshots":
-		return debugPrintSnapshots(ctx, repo, gopts.stdout)
+		return debugPrintSnapshots(ctx, repo, gopts.term.OutputWriter())
 	case "packs":
-		return printPacks(ctx, repo, gopts.stdout, printer)
+		return printPacks(ctx, repo, gopts.term.OutputWriter(), printer)
 	case "all":
 		printer.S("snapshots:")
-		err := debugPrintSnapshots(ctx, repo, gopts.stdout)
+		err := debugPrintSnapshots(ctx, repo, gopts.term.OutputWriter())
 		if err != nil {
 			return err
 		}
 
 		printer.S("indexes:")
-		err = dumpIndexes(ctx, repo, gopts.stdout, printer)
+		err = dumpIndexes(ctx, repo, gopts.term.OutputWriter(), printer)
 		if err != nil {
 			return err
 		}

cmd/restic/cmd_diff.go

@@ -424,7 +424,7 @@ func runDiff(ctx context.Context, opts DiffOptions, gopts GlobalOptions, args []
 	}
 
 	if gopts.JSON {
-		enc := json.NewEncoder(gopts.stdout)
+		enc := json.NewEncoder(gopts.term.OutputWriter())
 		c.printChange = func(change *Change) {
 			err := enc.Encode(change)
 			if err != nil {
@@ -458,7 +458,7 @@ func runDiff(ctx context.Context, opts DiffOptions, gopts GlobalOptions, args []
 	updateBlobs(repo, stats.BlobsAfter.Sub(both).Sub(stats.BlobsCommon), &stats.Added, printer.E)
 
 	if gopts.JSON {
-		err := json.NewEncoder(gopts.stdout).Encode(stats)
+		err := json.NewEncoder(gopts.term.OutputWriter()).Encode(stats)
 		if err != nil {
 			printer.E("JSON encode failed: %v", err)
 		}

cmd/restic/cmd_diff_integration_test.go

@@ -15,13 +15,11 @@ import (
 )
 
 func testRunDiffOutput(t testing.TB, gopts GlobalOptions, firstSnapshotID string, secondSnapshotID string) (string, error) {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
 		opts := DiffOptions{
 			ShowMetadata: false,
 		}
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			return runDiff(ctx, opts, gopts, []string{firstSnapshotID, secondSnapshotID}, gopts.term)
-		})
+		return runDiff(ctx, opts, gopts, []string{firstSnapshotID, secondSnapshotID}, gopts.term)
 	})
 	return buf.String(), err
 }

cmd/restic/cmd_features.go

@@ -49,7 +49,7 @@ Exit status is 1 if there was any error.
 			for _, flag := range flags {
 				tab.AddRow(flag)
 			}
-			return tab.Write(globalOptions.stdout)
+			return tab.Write(globalOptions.term.OutputWriter())
 		},
 	}
 

cmd/restic/cmd_find_integration_test.go

@@ -11,12 +11,10 @@ import (
 )
 
 func testRunFind(t testing.TB, wantJSON bool, opts FindOptions, gopts GlobalOptions, pattern string) []byte {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
 		gopts.JSON = wantJSON
 
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			return runFind(ctx, opts, gopts, []string{pattern}, gopts.term)
-		})
+		return runFind(ctx, opts, gopts, []string{pattern}, gopts.term)
 	})
 	rtest.OK(t, err)
 	return buf.Bytes()

cmd/restic/cmd_forget.go

@@ -251,7 +251,7 @@ func runForget(ctx context.Context, opts ForgetOptions, pruneOptions PruneOption
 			}
 
 			if gopts.Verbose >= 1 && !gopts.JSON {
-				err = PrintSnapshotGroupHeader(gopts.stdout, k)
+				err = PrintSnapshotGroupHeader(gopts.term.OutputWriter(), k)
 				if err != nil {
 					return err
 				}
@@ -274,7 +274,7 @@ func runForget(ctx context.Context, opts ForgetOptions, pruneOptions PruneOption
 			}
 			if len(keep) != 0 && !gopts.Quiet && !gopts.JSON {
 				printer.P("keep %d snapshots:\n", len(keep))
-				if err := PrintSnapshots(gopts.stdout, keep, reasons, opts.Compact); err != nil {
+				if err := PrintSnapshots(gopts.term.OutputWriter(), keep, reasons, opts.Compact); err != nil {
 					return err
 				}
 				printer.P("\n")
@@ -283,7 +283,7 @@ func runForget(ctx context.Context, opts ForgetOptions, pruneOptions PruneOption
 
 			if len(remove) != 0 && !gopts.Quiet && !gopts.JSON {
 				printer.P("remove %d snapshots:\n", len(remove))
-				if err := PrintSnapshots(gopts.stdout, remove, nil, opts.Compact); err != nil {
+				if err := PrintSnapshots(gopts.term.OutputWriter(), remove, nil, opts.Compact); err != nil {
 					return err
 				}
 				printer.P("\n")
@@ -328,7 +328,7 @@ func runForget(ctx context.Context, opts ForgetOptions, pruneOptions PruneOption
 	}
 
 	if gopts.JSON && len(jsonGroups) > 0 {
-		err = printJSONForget(gopts.stdout, jsonGroups)
+		err = printJSONForget(gopts.term.OutputWriter(), jsonGroups)
 		if err != nil {
 			return err
 		}

cmd/restic/cmd_generate.go

@@ -84,7 +84,7 @@ func writeCompletion(filename string, shell string, generate func(w io.Writer) e
 		defer func() { err = outFile.Close() }()
 		outWriter = outFile
 	} else {
-		outWriter = gopts.stdout
+		outWriter = gopts.term.OutputWriter()
 	}
 
 	err = generate(outWriter)

cmd/restic/cmd_generate_integration_test.go

@@ -9,10 +9,8 @@ import (
 )
 
 func testRunGenerate(t testing.TB, gopts GlobalOptions, opts generateOptions) ([]byte, error) {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			return runGenerate(opts, gopts, []string{}, gopts.term)
-		})
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
+		return runGenerate(opts, gopts, []string{}, gopts.term)
 	})
 	return buf.Bytes(), err
 }

cmd/restic/cmd_init.go

@@ -132,7 +132,7 @@ func runInit(ctx context.Context, opts InitOptions, gopts GlobalOptions, args []
 			ID:          s.Config().ID,
 			Repository:  location.StripPassword(gopts.backends, gopts.Repo),
 		}
-		return json.NewEncoder(gopts.stdout).Encode(status)
+		return json.NewEncoder(gopts.term.OutputWriter()).Encode(status)
 	}
 
 	return nil

cmd/restic/cmd_key_integration_test.go

@@ -16,10 +16,8 @@ import (
 )
 
 func testRunKeyListOtherIDs(t testing.TB, gopts GlobalOptions) []string {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			return runKeyList(ctx, gopts, []string{}, gopts.term)
-		})
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
+		return runKeyList(ctx, gopts, []string{}, gopts.term)
 	})
 	rtest.OK(t, err)
 

cmd/restic/cmd_key_list.go

@@ -95,7 +95,7 @@ func listKeys(ctx context.Context, s *repository.Repository, gopts GlobalOptions
 	}
 
 	if gopts.JSON {
-		return json.NewEncoder(gopts.stdout).Encode(keys)
+		return json.NewEncoder(gopts.term.OutputWriter()).Encode(keys)
 	}
 
 	tab := table.New()
@@ -108,5 +108,5 @@ func listKeys(ctx context.Context, s *repository.Repository, gopts GlobalOptions
 		tab.AddRow(key)
 	}
 
-	return tab.Write(gopts.stdout)
+	return tab.Write(gopts.term.OutputWriter())
 }

cmd/restic/cmd_list_integration_test.go

@@ -11,10 +11,8 @@ import (
 )
 
 func testRunList(t testing.TB, gopts GlobalOptions, tpe string) restic.IDs {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			return runList(ctx, gopts, []string{tpe}, gopts.term)
-		})
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
+		return runList(ctx, gopts, []string{tpe}, gopts.term)
 	})
 	rtest.OK(t, err)
 	return parseIDsFromReader(t, buf)

cmd/restic/cmd_ls.go

@@ -382,11 +382,11 @@ func runLs(ctx context.Context, opts LsOptions, gopts GlobalOptions, args []stri
 
 	if gopts.JSON {
 		printer = &jsonLsPrinter{
-			enc: json.NewEncoder(gopts.stdout),
+			enc: json.NewEncoder(gopts.term.OutputWriter()),
 		}
 	} else if opts.Ncdu {
 		printer = &ncduLsPrinter{
-			out: gopts.stdout,
+			out: gopts.term.OutputWriter(),
 		}
 	} else {
 		printer = &textLsPrinter{

cmd/restic/cmd_ls_integration_test.go

@@ -13,11 +13,9 @@ import (
 )
 
 func testRunLsWithOpts(t testing.TB, gopts GlobalOptions, opts LsOptions, args []string) []byte {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
 		gopts.Quiet = true
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			return runLs(context.TODO(), opts, gopts, args, gopts.term)
-		})
+		return runLs(context.TODO(), opts, gopts, args, gopts.term)
 	})
 	rtest.OK(t, err)
 	return buf.Bytes()

cmd/restic/cmd_prune_integration_test.go

@@ -89,7 +89,7 @@ func createPrunableRepo(t *testing.T, env *testEnvironment) {
 }
 
 func testRunForgetJSON(t testing.TB, gopts GlobalOptions, args ...string) {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
 		gopts.JSON = true
 		opts := ForgetOptions{
 			DryRun: true,
@@ -98,9 +98,7 @@ func testRunForgetJSON(t testing.TB, gopts GlobalOptions, args ...string) {
 		pruneOpts := PruneOptions{
 			MaxUnused: "5%",
 		}
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			return runForget(context.TODO(), opts, pruneOpts, gopts, gopts.term, args)
-		})
+		return runForget(context.TODO(), opts, pruneOpts, gopts, gopts.term, args)
 	})
 	rtest.OK(t, err)
 

cmd/restic/cmd_repair_index_integration_test.go

@@ -17,7 +17,7 @@ import (
 
 func testRunRebuildIndex(t testing.TB, gopts GlobalOptions) {
 	rtest.OK(t, withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-		gopts.stdout = io.Discard
+		gopts.Quiet = true
 		return runRebuildIndex(context.TODO(), RepairIndexOptions{}, gopts, gopts.term)
 	}))
 }
@@ -129,7 +129,7 @@ func TestRebuildIndexFailsOnAppendOnly(t *testing.T) {
 		return &appendOnlyBackend{r}, nil
 	}
 	err := withTermStatus(t, env.gopts, func(ctx context.Context, gopts GlobalOptions) error {
-		gopts.stdout = io.Discard
+		gopts.Quiet = true
 		return runRebuildIndex(context.TODO(), RepairIndexOptions{}, gopts, gopts.term)
 	})
 

cmd/restic/cmd_snapshots.go

@@ -103,7 +103,7 @@ func runSnapshots(ctx context.Context, opts SnapshotOptions, gopts GlobalOptions
 	}
 
 	if gopts.JSON {
-		err := printSnapshotGroupJSON(gopts.stdout, snapshotGroups, grouped)
+		err := printSnapshotGroupJSON(gopts.term.OutputWriter(), snapshotGroups, grouped)
 		if err != nil {
 			printer.E("error printing snapshots: %v", err)
 		}
@@ -116,12 +116,12 @@ func runSnapshots(ctx context.Context, opts SnapshotOptions, gopts GlobalOptions
 		}
 
 		if grouped {
-			err := PrintSnapshotGroupHeader(gopts.stdout, k)
+			err := PrintSnapshotGroupHeader(gopts.term.OutputWriter(), k)
 			if err != nil {
 				return err
 			}
 		}
-		err := PrintSnapshots(gopts.stdout, list, nil, opts.Compact)
+		err := PrintSnapshots(gopts.term.OutputWriter(), list, nil, opts.Compact)
 		if err != nil {
 			return err
 		}

cmd/restic/cmd_snapshots_integration_test.go

@@ -10,13 +10,11 @@ import (
 )
 
 func testRunSnapshots(t testing.TB, gopts GlobalOptions) (newest *Snapshot, snapmap map[restic.ID]Snapshot) {
-	buf, err := withCaptureStdout(gopts, func(gopts GlobalOptions) error {
+	buf, err := withCaptureStdout(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
 		gopts.JSON = true
 
 		opts := SnapshotOptions{}
-		return withTermStatus(t, gopts, func(ctx context.Context, gopts GlobalOptions) error {
-			return runSnapshots(ctx, opts, gopts, []string{}, gopts.term)
-		})
+		return runSnapshots(ctx, opts, gopts, []string{}, gopts.term)
 	})
 	rtest.OK(t, err)
 

cmd/restic/cmd_stats.go

@@ -169,7 +169,7 @@ func runStats(ctx context.Context, opts StatsOptions, gopts GlobalOptions, args
 	}
 
 	if gopts.JSON {
-		err = json.NewEncoder(gopts.stdout).Encode(stats)
+		err = json.NewEncoder(gopts.term.OutputWriter()).Encode(stats)
 		if err != nil {
 			return fmt.Errorf("encoding output: %v", err)
 		}

cmd/restic/cmd_version.go

@@ -43,7 +43,7 @@ Exit status is 1 if there was any error.
 					GoArch:      runtime.GOARCH,
 				}
 
-				err := json.NewEncoder(globalOptions.stdout).Encode(jsonS)
+				err := json.NewEncoder(globalOptions.term.OutputWriter()).Encode(jsonS)
 				if err != nil {
 					printer.E("JSON encode failed: %v\n", err)
 					return

cmd/restic/global.go

@@ -3,7 +3,6 @@ package main
 import (
 	"context"
 	"fmt"
-	"io"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -74,7 +73,6 @@ type GlobalOptions struct {
 	limiter.Limits
 
 	password string
-	stdout   io.Writer
 	term     ui.Terminal
 
 	backends                              *location.Registry

cmd/restic/integration_helpers_test.go

@@ -212,10 +212,6 @@ func withTestEnvironment(t testing.TB) (env *testEnvironment, cleanup func()) {
 		Quiet:    true,
 		CacheDir: env.cache,
 		password: rtest.TestPassword,
-		// stdout and stderr are written to by Warnf etc. That is the written data
-		// usually consists of one or multiple lines and therefore can be handled well
-		// by t.Log.
-		stdout:   &logOutputter{t},
 		extended: make(options.Options),
 
 		// replace this hook with "nil" if listing a filetype more than once is necessary
@@ -416,18 +412,24 @@ func testFileSize(filename string, size int64) error {
 	return nil
 }
 
-func withCaptureStdout(gopts GlobalOptions, inner func(gopts GlobalOptions) error) (*bytes.Buffer, error) {
+func withCaptureStdout(t testing.TB, gopts GlobalOptions, callback func(ctx context.Context, gopts GlobalOptions) error) (*bytes.Buffer, error) {
 	buf := bytes.NewBuffer(nil)
-	gopts.stdout = buf
-	err := inner(gopts)
+	err := withTermStatusRaw(os.Stdin, buf, &logOutputter{t: t}, gopts, callback)
 	return buf, err
 }
 
 func withTermStatus(t testing.TB, gopts GlobalOptions, callback func(ctx context.Context, gopts GlobalOptions) error) error {
+	// stdout and stderr are written to by printer functions etc. That is the written data
+	// usually consists of one or multiple lines and therefore can be handled well
+	// by t.Log.
+	return withTermStatusRaw(os.Stdin, &logOutputter{t: t}, &logOutputter{t: t}, gopts, callback)
+}
+
+func withTermStatusRaw(stdin io.ReadCloser, stdout, stderr io.Writer, gopts GlobalOptions, callback func(ctx context.Context, gopts GlobalOptions) error) error {
 	ctx, cancel := context.WithCancel(context.TODO())
 	var wg sync.WaitGroup
 
-	term := termstatus.New(os.Stdin, gopts.stdout, &logOutputter{t: t}, gopts.Quiet)
+	term := termstatus.New(stdin, stdout, stderr, gopts.Quiet)
 	gopts.term = term
 	wg.Add(1)
 	go func() {

cmd/restic/main.go

@@ -173,13 +173,11 @@ func main() {
 		version, runtime.Version(), runtime.GOOS, runtime.GOARCH)
 
 	globalOptions := GlobalOptions{
-		stdout:   os.Stdout,
 		backends: collectBackends(),
 	}
 	func() {
 		term, cancel := termstatus.Setup(os.Stdin, os.Stdout, os.Stderr, globalOptions.Quiet)
 		defer cancel()
-		globalOptions.stdout = termstatus.WrapStdout(term)
 		globalOptions.term = term
 		ctx := createGlobalContext(os.Stderr)
 		err = newRootCommand(&globalOptions).ExecuteContext(ctx)

internal/ui/mock.go

@@ -40,6 +40,10 @@ func (m *MockTerminal) ReadPassword(_ context.Context, _ string) (string, error)
 	return "password", nil
 }
 
+func (m *MockTerminal) OutputWriter() io.Writer {
+	return nil
+}
+
 func (m *MockTerminal) OutputRaw() io.Writer {
 	return nil
 }

internal/ui/terminal.go

@@ -16,9 +16,12 @@ type Terminal interface {
 	SetStatus(lines []string)
 	// CanUpdateStatus returns true if the terminal can update the status lines.
 	CanUpdateStatus() bool
+
 	InputRaw() io.ReadCloser
 	InputIsTerminal() bool
 	ReadPassword(ctx context.Context, prompt string) (string, error)
+
+	OutputWriter() io.Writer
 	// OutputRaw returns the output writer. Should only be used if there is no
 	// other option. Must not be used in combination with Print, Error, SetStatus
 	// or any other method that writes to the terminal.

internal/ui/termstatus/status.go

@@ -30,6 +30,9 @@ type Terminal struct {
 	outputIsTerminal bool
 	canUpdateStatus  bool
 
+	outputWriter     io.WriteCloser
+	outputWriterOnce sync.Once
+
 	// will be closed when the goroutine which runs Run() terminates, so it'll
 	// yield a default value immediately
 	closed chan struct{}
@@ -73,6 +76,9 @@ func Setup(stdin io.ReadCloser, stdout, stderr io.Writer, quiet bool) (*Terminal
 	}()
 
 	return term, func() {
+		if term.outputWriter != nil {
+			_ = term.outputWriter.Close()
+		}
 		// shutdown termstatus
 		cancel()
 		wg.Wait()
@@ -158,6 +164,13 @@ func (t *Terminal) CanUpdateStatus() bool {
 	return t.canUpdateStatus
 }
 
+func (t *Terminal) OutputWriter() io.Writer {
+	t.outputWriterOnce.Do(func() {
+		t.outputWriter = newLineWriter(t.Print)
+	})
+	return t.outputWriter
+}
+
 // OutputRaw returns the output writer. Should only be used if there is no
 // other option. Must not be used in combination with Print, Error, SetStatus
 // or any other method that writes to the terminal.

internal/ui/termstatus/stdio_wrapper.go

@@ -6,12 +6,6 @@ import (
 	"sync"
 )
 
-// WrapStdout returns line-buffering replacements for os.Stdout.
-// On Close, the remaining bytes are written, followed by a line break.
-func WrapStdout(term *Terminal) (stdout io.WriteCloser) {
-	return newLineWriter(term.Print)
-}
-
 type lineWriter struct {
 	m     sync.Mutex
 	buf   bytes.Buffer