Unicorn 0.97.0 - polishing and cleaning up

Unicorn is an HTTP server for Rack applications designed to only serve
fast clients on low-latency, high-bandwidth connections and take
advantage of features in Unix/Unix-like kernels. Slow clients should
only be served by placing a reverse proxy capable of fully buffering
both the the request and response in between Unicorn and slow clients.


A bunch of small fixes related to startup/configuration and hot
reload issues with HUP:

  • Variables in the user-generated config.ru files no longer
    risk clobbering variables used in laucher scripts.

  • signal handlers are initialized before the pid file is
    dropped, so over-eager firing of init scripts won’t
    mysteriously nuke a process.

  • SIGHUP will return app to original state if an updated
    config.ru fails to load due to {Syntax,Load}Error.

  • unicorn_rails should be Rails 3 compatible out-of-the-box
    (‘unicorn’ works as always, and is recommended for Rails 3)

  • unicorn_rails is finally “working_directory”-aware when
    generating default temporary paths and pid file

  • config.ru encoding is the application’s default in 1.9,
    not forced to binary like many parts of Unicorn.

  • configurator learned to handle the “user” directive outside
    of after_fork hook (which will always remain supported).

There are also various internal cleanups and possible speedups.