LockedStderr

pub const LockedStderr = struct {
    file_writer: *File.Writer,
    terminal_mode: Terminal.Mode,

    pub fn terminal(ls: LockedStderr) Terminal {
        return .{
            .writer = &ls.file_writer.interface,
            .mode = ls.terminal_mode,
        };
    }

    pub fn clear(ls: LockedStderr, buffer: []u8) Cancelable!void {
        const fw = ls.file_writer;
        std.Progress.clearWrittenWithEscapeCodes(fw) catch |err| switch (err) {
            error.WriteFailed => switch (fw.err.?) {
                error.Canceled => |e| return e,
                else => {},
            },
        };
        fw.interface.flush() catch |err| switch (err) {
            error.WriteFailed => switch (fw.err.?) {
                error.Canceled => |e| return e,
                else => {},
            },
        };
        fw.interface.buffer = buffer;
    }
}