Merge pull request #585 from trbs/progress_without_terminal

show progress every second when run non interactively

src/cmds/restic/cmd_backup.go

@@ -112,12 +112,12 @@ func (cmd CmdBackup) newScanProgress() *restic.Progress {
 		return nil
 	}
 
-	p := restic.NewProgress(time.Second)
+	p := restic.NewProgress()
 	p.OnUpdate = func(s restic.Stat, d time.Duration, ticker bool) {
-		fmt.Printf("%s[%s] %d directories, %d files, %s\r", ClearLine(), formatDuration(d), s.Dirs, s.Files, formatBytes(s.Bytes))
+		PrintProgress("[%s] %d directories, %d files, %s", formatDuration(d), s.Dirs, s.Files, formatBytes(s.Bytes))
 	}
 	p.OnDone = func(s restic.Stat, d time.Duration, ticker bool) {
-		fmt.Printf("%sscanned %d directories, %d files in %s\n", ClearLine(), s.Dirs, s.Files, formatDuration(d))
+		PrintProgress("scanned %d directories, %d files in %s\n", s.Dirs, s.Files, formatDuration(d))
 	}
 
 	return p
@@ -128,7 +128,7 @@ func (cmd CmdBackup) newArchiveProgress(todo restic.Stat) *restic.Progress {
 		return nil
 	}
 
-	archiveProgress := restic.NewProgress(time.Second)
+	archiveProgress := restic.NewProgress()
 
 	var bps, eta uint64
 	itemsTodo := todo.Files + todo.Dirs
@@ -167,7 +167,7 @@ func (cmd CmdBackup) newArchiveProgress(todo restic.Stat) *restic.Progress {
 			}
 		}
 
-		fmt.Printf("%s%s%s\r", ClearLine(), status1, status2)
+		PrintProgress("%s%s", status1, status2)
 	}
 
 	archiveProgress.OnDone = func(s restic.Stat, d time.Duration, ticker bool) {
@@ -182,7 +182,7 @@ func (cmd CmdBackup) newArchiveStdinProgress() *restic.Progress {
 		return nil
 	}
 
-	archiveProgress := restic.NewProgress(time.Second)
+	archiveProgress := restic.NewProgress()
 
 	var bps uint64
 
@@ -208,7 +208,7 @@ func (cmd CmdBackup) newArchiveStdinProgress() *restic.Progress {
 			}
 		}
 
-		fmt.Printf("%s%s\r", ClearLine(), status1)
+		PrintProgress("%s%s", status1)
 	}
 
 	archiveProgress.OnDone = func(s restic.Stat, d time.Duration, ticker bool) {

src/cmds/restic/cmd_check.go

@@ -38,7 +38,7 @@ func (cmd CmdCheck) newReadProgress(todo restic.Stat) *restic.Progress {
 		return nil
 	}
 
-	readProgress := restic.NewProgress(time.Second)
+	readProgress := restic.NewProgress()
 
 	readProgress.OnUpdate = func(s restic.Stat, d time.Duration, ticker bool) {
 		status := fmt.Sprintf("[%s] %s  %d / %d items",
@@ -54,7 +54,7 @@ func (cmd CmdCheck) newReadProgress(todo restic.Stat) *restic.Progress {
 			}
 		}
 
-		fmt.Printf("%s%s\r", ClearLine(), status)
+		PrintProgress("%s", status)
 	}
 
 	readProgress.OnDone = func(s restic.Stat, d time.Duration, ticker bool) {

src/cmds/restic/cmd_prune.go

@@ -39,7 +39,7 @@ func newProgressMax(show bool, max uint64, description string) *restic.Progress
 		return nil
 	}
 
-	p := restic.NewProgress(time.Second)
+	p := restic.NewProgress()
 
 	p.OnUpdate = func(s restic.Stat, d time.Duration, ticker bool) {
 		status := fmt.Sprintf("[%s] %s  %d / %d %s",
@@ -55,7 +55,7 @@ func newProgressMax(show bool, max uint64, description string) *restic.Progress
 			}
 		}
 
-		fmt.Printf("%s%s\r", ClearLine(), status)
+		PrintProgress("%s", status)
 	}
 
 	p.OnDone = func(s restic.Stat, d time.Duration, ticker bool) {

src/cmds/restic/global.go

@@ -24,6 +24,7 @@ import (
 
 var version = "compiled manually"
 var compiledAt = "unknown time"
+var isTerminal = terminal.IsTerminal(int(os.Stdout.Fd()))
 
 // GlobalOptions holds all those options that can be set for every command.
 type GlobalOptions struct {
@@ -60,11 +61,11 @@ func checkErrno(err error) error {
 // restoreTerminal installs a cleanup handler that restores the previous
 // terminal state on exit.
 func restoreTerminal() {
-	fd := int(os.Stdout.Fd())
-	if !terminal.IsTerminal(fd) {
+	if !isTerminal {
 		return
 	}
 
+	fd := int(os.Stdout.Fd())
 	state, err := terminal.GetState(fd)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "unable to get terminal state: %v\n", err)
@@ -116,17 +117,38 @@ func (o GlobalOptions) Verbosef(format string, args ...interface{}) {
 }
 
 // ShowProgress returns true iff the progress status should be written, i.e.
-// the quiet flag is not set and the output is a terminal.
+// the quiet flag is not set.
 func (o GlobalOptions) ShowProgress() bool {
 	if o.Quiet {
 		return false
 	}
 
-	if !terminal.IsTerminal(int(os.Stdout.Fd())) {
-		return false
+	return true
+}
+
+// PrintProgress wraps fmt.Printf to handle the difference in writing progress
+// information to terminals and non-terminal stdout
+func PrintProgress(format string, args ...interface{}) {
+	var (
+		message         string
+		carriageControl string
+	)
+	message = fmt.Sprintf(format, args...)
+
+	if !(strings.HasSuffix(message, "\r") || strings.HasSuffix(message, "\n")) {
+		if isTerminal {
+			carriageControl = "\r"
+		} else {
+			carriageControl = "\n"
+		}
+		message = fmt.Sprintf("%s%s", message, carriageControl)
 	}
 
-	return true
+	if isTerminal {
+		message = fmt.Sprintf("%s%s", ClearLine(), message)
+	}
+
+	fmt.Print(message)
 }
 
 // Warnf writes the message to the configured stderr stream.
@@ -183,7 +205,7 @@ func (o GlobalOptions) ReadPassword(prompt string) string {
 		err      error
 	)
 
-	if terminal.IsTerminal(int(os.Stdin.Fd())) {
+	if isTerminal {
 		password, err = readPasswordTerminal(os.Stdin, os.Stderr, prompt)
 	} else {
 		password, err = readPassword(os.Stdin)