doc: update support status for Ruby versions

unicorn 5 will not support Ruby 1.8 anymore.

Drop mentions of Rubinius, too, it's too difficult to support due to
the proprietary and registration-required nature of its bug tracker.
The smaller memory footprint and CoW-friendly memory allocator in
mainline Ruby is a better fit for unicorn, anyways.

Since Ruby 1.9+ bundles RubyGems and gem startup is faster nowadays,
we'll just depend on that instead of not loading RubyGems.

Drop the local.mk.sample file, too, since it's way out-of-date
and probably isn't useful (I have not used it in a while).

HACKING

@@ -19,13 +19,6 @@ RubyGems.
 Users of GNU-based systems (such as GNU/Linux) usually have GNU make
 installed as "make" instead of "gmake".
 
-Since we don't load RubyGems by default, loading Rack properly requires
-setting up RUBYLIB to point to where Rack is located.  Not loading
-RubyGems drastically lowers the time to run the full test suite.  You
-may setup a "local.mk" file in the top-level working directory to setup
-your RUBYLIB and any other environment variables.  A "local.mk.sample"
-file is provided for reference.
-
 Running the entire test suite with 4 tests in parallel:
 
   gmake -j4 check
@@ -70,10 +63,9 @@ becomes unavailable.
 
 === Ruby/C Compatibility
 
-We target Ruby 1.8.6+, 1.9 and will target Rubinius as it becomes
-production-ready.  We need the Ruby implementation to support fork,
-exec, pipe, UNIX signals, access to integer file descriptors and
-ability to use unlinked files.
+We target mainline Ruby 1.9.3 and later.  We need the Ruby
+implementation to support fork, exec, pipe, UNIX signals, access to
+integer file descriptors and ability to use unlinked files.
 
 All of our C code is OS-independent and should run on compilers
 supported by the versions of Ruby we target.
@@ -123,13 +115,6 @@ You can build the Unicorn gem with the following command:
 
 It is easy to install the contents of your git working directory:
 
-Via RubyGems (RubyGems 1.3.5+ recommended for prerelease versions):
+Via RubyGems
 
   gmake install-gem
-
-Without RubyGems (via setup.rb):
-
-  gmake install
-
-It is not at all recommended to mix a RubyGems installation with an
-installation done without RubyGems, however.

KNOWN_ISSUES

@@ -17,16 +17,6 @@ acceptable solution.  Those issues are documented here.
   have builtin workarounds for Kernel#rand and OpenSSL::Random users,
   but applications may use other PRNGs.
 
-* Under some versions of Ruby 1.8, it is necessary to call +srand+ in an
-  after_fork hook to get correct random number generation.  We have a builtin
-  workaround for this starting with \Unicorn 3.6.1
-
-  See http://redmine.ruby-lang.org/issues/show/4338
-
-* On Ruby 1.8 prior to Ruby 1.8.7-p248, *BSD platforms have a broken
-  stdio that causes failure for file uploads larger than 112K.  Upgrade
-  your version of Ruby or continue using Unicorn 1.x/3.4.x.
-
 * For notes on sandboxing tools such as Bundler or Isolate,
   see the {Sandbox}[link:Sandbox.html] page.
 
@@ -44,6 +34,16 @@ acceptable solution.  Those issues are documented here.
 
 == Known Issues (Old)
 
+* Under some versions of Ruby 1.8, it is necessary to call +srand+ in an
+  after_fork hook to get correct random number generation.  We have a builtin
+  workaround for this starting with \Unicorn 3.6.1
+
+  See http://redmine.ruby-lang.org/issues/show/4338
+
+* On Ruby 1.8 prior to Ruby 1.8.7-p248, *BSD platforms have a broken
+  stdio that causes failure for file uploads larger than 112K.  Upgrade
+  your version of Ruby or continue using Unicorn 1.x/3.4.x.
+
 * Under Ruby 1.9.1, methods like Array#shuffle and Array#sample will
   segfault if called after forking.  Upgrade to Ruby 1.9.2 or call
   "Kernel.rand" in your after_fork hook to reinitialize the random

README

@@ -12,7 +12,8 @@ both the the request and response in between \Unicorn and slow clients.
   cut out everything that is better supported by the operating system,
   {nginx}[http://nginx.net/] or {Rack}[http://rack.github.io/].
 
-* Compatible with Ruby 1.8 and later.  Rubinius support is in-progress.
+* Compatible with Ruby 1.9.3 and later.
+  unicorn 4.8.x will remain supported for Ruby 1.8 users.
 
 * Process management: \Unicorn will reap and restart workers that
   die from broken apps.  There is no need to manage multiple processes

Sandbox

@@ -86,7 +86,7 @@ For now workarounds include doing one of the following:
 
 3. Explicitly setting RUBYLIB or $LOAD_PATH to include any gem path
    where the unicorn gem is installed
-   (e.g. /usr/lib/ruby/gems/1.9.1/gems/unicorn-VERSION/lib)
+   (e.g. /usr/lib/ruby/gems/1.9.3/gems/unicorn-VERSION/lib)
 
 === RUBYOPT pollution from SIGUSR2 upgrades
 

lib/unicorn/configurator.rb

@@ -306,8 +306,6 @@ def listeners(addresses) # :nodoc:
   #   to receive IPv4 queries on dual-stack systems.  A separate IPv4-only
   #   listener is required if this is true.
   #
-  #   This option is only available for Ruby 1.9.2 and later.
-  #
   #   Enabling this option for the IPv6-only listener and having a
   #   separate IPv4 listener is recommended if you wish to support IPv6
   #   on the same TCP port.  Otherwise, the value of \env[\"REMOTE_ADDR\"]

lib/unicorn/http_server.rb

@@ -67,7 +67,7 @@ class Unicorn::HttpServer
   # you can set the following in your Unicorn config file, HUP and then
   # continue with the traditional USR2 + QUIT upgrade steps:
   #
-  #   Unicorn::HttpServer::START_CTX[0] = "/home/bofh/1.9.2/bin/unicorn"
+  #   Unicorn::HttpServer::START_CTX[0] = "/home/bofh/2.2.0/bin/unicorn"
   START_CTX = {
     :argv => ARGV.map { |arg| arg.dup },
     0 => $0.dup,
@@ -453,7 +453,7 @@ def reexec
 
       # exec(command, hash) works in at least 1.9.1+, but will only be
       # required in 1.9.4/2.0.0 at earliest.
-      cmd << listener_fds if RUBY_VERSION >= "1.9.1"
+      cmd << listener_fds
       logger.info "executing #{cmd.inspect} (in #{Dir.pwd})"
       before_exec.call(self)
       exec(*cmd)

t/README

@@ -10,7 +10,7 @@ comfortable writing integration tests with.
 
 == Requirements
 
-* {Ruby 1.8 or 1.9}[http://www.ruby-lang.org/] (duh!)
+* {Ruby 1.9.3+}[https://www.ruby-lang.org/] (duh!)
 * {GNU make}[http://www.gnu.org/software/make/]
 * {socat}[http://www.dest-unreach.org/socat/]
 * {curl}[http://curl.haxx.se/]

test/unit/test_socket_helper.rb

@@ -182,8 +182,8 @@ def test_ipv6only
     sock = bind_listen "[#@test6_addr]:#{port}", :ipv6only => true
     cur = sock.getsockopt(:IPPROTO_IPV6, :IPV6_V6ONLY).unpack('i')[0]
     assert_equal 1, cur
-    rescue Errno::EAFNOSUPPORT
-  end if RUBY_VERSION >= "1.9.2"
+  rescue Errno::EAFNOSUPPORT
+  end
 
   def test_reuseport
     port = unused_port @test_addr