Ensure underlying logger objects are sync=true

Userspace buffering defaults are dangerous as the Ruby default
IO objects do not do line-aware buffering.  This makes the
README examples with File.open much safer to use out-of-the-box
for users of the pure-Ruby version.  For users on the MRI C
extension logging to regular files, this should not have any
effect as we've optimized those to do unbuffered write(2)
syscalls anyways.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/clogger/pure.rb b/lib/clogger/pure.rb
index d8752b3..57e727b 100644
--- a/lib/clogger/pure.rb
+++ b/lib/clogger/pure.rb
@@ -8,6 +8,7 @@ class Clogger
   def initialize(app, opts = {})
     @app = app
     @logger = opts[:logger]
+    (@logger.sync = true) rescue nil
     @fmt_ops = compile_format(opts[:format] || Format::Common)
     @wrap_body = need_wrap_body?(@fmt_ops)
     @reentrant = nil