Remove Exitf function

Commands should use the normal shutdown path. In addition, the Exitf
function was only used by `dump` and `restore` but not any other command
which introduces the risk of inconsistent behavior.

cmd/restic/cmd_dump.go

@@ -141,7 +141,7 @@ func runDump(ctx context.Context, opts DumpOptions, gopts GlobalOptions, args []
 
 	sn, err := restic.FindFilteredSnapshot(ctx, repo.Backend(), repo, opts.Paths, opts.Tags, opts.Hosts, nil, snapshotIDString)
 	if err != nil {
-		Exitf(1, "failed to find snapshot: %v", err)
+		return errors.Fatalf("failed to find snapshot: %v", err)
 	}
 
 	err = repo.LoadIndex(ctx)
@@ -151,13 +151,13 @@ func runDump(ctx context.Context, opts DumpOptions, gopts GlobalOptions, args []
 
 	tree, err := restic.LoadTree(ctx, repo, *sn.Tree)
 	if err != nil {
-		Exitf(2, "loading tree for snapshot %q failed: %v", snapshotIDString, err)
+		return errors.Fatalf("loading tree for snapshot %q failed: %v", snapshotIDString, err)
 	}
 
 	d := dump.New(opts.Archive, repo, os.Stdout)
 	err = printFromTree(ctx, tree, repo, "/", splittedPath, d)
 	if err != nil {
-		Exitf(2, "cannot dump file: %v", err)
+		return errors.Fatalf("cannot dump file: %v", err)
 	}
 
 	return nil

cmd/restic/cmd_restore.go

@@ -133,7 +133,7 @@ func runRestore(ctx context.Context, opts RestoreOptions, gopts GlobalOptions, a
 
 	sn, err := restic.FindFilteredSnapshot(ctx, repo.Backend(), repo, opts.Hosts, opts.Tags, opts.Paths, nil, snapshotIDString)
 	if err != nil {
-		Exitf(1, "failed to find snapshot: %v", err)
+		return errors.Fatalf("failed to find snapshot: %v", err)
 	}
 
 	err = repo.LoadIndex(ctx)

cmd/restic/global.go

@@ -281,17 +281,6 @@ func Warnf(format string, args ...interface{}) {
 	}
 }
 
-// Exitf uses Warnf to write the message and then terminates the process with
-// the given exit code.
-func Exitf(exitcode int, format string, args ...interface{}) {
-	if !(strings.HasSuffix(format, "\n")) {
-		format += "\n"
-	}
-
-	Warnf(format, args...)
-	Exit(exitcode)
-}
-
 // resolvePassword determines the password to be used for opening the repository.
 func resolvePassword(opts GlobalOptions, envStr string) (string, error) {
 	if opts.PasswordFile != "" && opts.PasswordCommand != "" {