Merge branch 'log-flush' into 'master'v7.1.1

Flush log file after every write

See merge request gitlab-org/gitlab-shell!199

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/gitlab_logger.rb b/lib/gitlab_logger.rb
index cdca25b..f81c2f6 100644
--- a/lib/gitlab_logger.rb
+++ b/lib/gitlab_logger.rb
@@ -25,7 +25,13 @@ class GitlabLogger
 
   def initialize(level, path, log_format)
     @level = level
+
     @log_file = File.open(path, 'ab')
+    # By default Ruby will buffer writes. This is a problem when we exec
+    # into a new command before Ruby flushed its buffers. Setting 'sync' to
+    # true disables Ruby's buffering.
+    @log_file.sync = true
+
     @log_format = log_format
   end