update dependency to Ruby 2.5+

We actually need Ruby 2.3+ for `accept_nonblock(exception: false)';
and (AFAIK) we can't easily use a subclass of `Socket' while using
Socket#accept_nonblock to inject WriteSplat support for
`IO#write(*multi_args)'

So just depend on Ruby 2.5+ since all my Ruby is already on the
already-ancient Ruby 2.7+ anyways.

5 files changed, 5 insertions, 12 deletions

diff --git a/HACKING b/HACKING
index 020209e..5aca83e 100644
--- a/HACKING
+++ b/HACKING
@@ -60,7 +60,7 @@ becomes unavailable.
 
 === Ruby/C Compatibility
 
-We target C Ruby 2.0 and later.  We need the Ruby
+We target C Ruby 2.5 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.
 
diff --git a/README b/README
index ff14c03..84c0fdf 100644
--- a/README
+++ b/README
@@ -15,7 +15,7 @@ and slow clients.
   cut out everything that is better supported by the operating system,
   {nginx}[https://nginx.org/] or {Rack}[https://rack.github.io/].
 
-* Compatible with Ruby 2.0.0 and later.
+* Compatible with Ruby 2.5 and later.
 
 * Process management: unicorn reaps and restarts workers that die
   from broken code.  There is no need to manage multiple processes
diff --git a/lib/unicorn/write_splat.rb b/lib/unicorn/write_splat.rb
deleted file mode 100644
index 7e6e363..0000000
--- a/lib/unicorn/write_splat.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- encoding: binary -*-
-# compatibility module for Ruby <= 2.4, remove when we go Ruby 2.5+
-module Unicorn::WriteSplat # :nodoc:
-  def write(*arg) # :nodoc:
-    super(arg.join(''))
-  end
-end
diff --git a/t/README b/t/README
index d09c715..7bd093d 100644
--- a/t/README
+++ b/t/README
@@ -14,7 +14,7 @@ Old tests are in Bourne shell and slowly being ported to Perl 5.
 
 == Requirements
 
-* {Ruby 2.0.0+}[https://www.ruby-lang.org/en/]
+* {Ruby 2.5.0+}[https://www.ruby-lang.org/en/]
 * {Perl 5.14+}[https://www.perl.org/] # your distro should have it
 * {GNU make}[https://www.gnu.org/software/make/]
 * {curl}[https://curl.haxx.se/]
diff --git a/unicorn.gemspec b/unicorn.gemspec
index 85183d9..e7e3ef7 100644
--- a/unicorn.gemspec
+++ b/unicorn.gemspec
@@ -25,11 +25,11 @@ Gem::Specification.new do |s|
   s.homepage = 'https://yhbt.net/unicorn/'
   s.test_files = test_files
 
-  # 2.0.0 is the minimum supported version. We don't specify
+  # 2.5.0 is the minimum supported version. We don't specify
   # a maximum version to make it easier to test pre-releases,
   # but we do warn users if they install unicorn on an untested
   # version in extconf.rb
-  s.required_ruby_version = ">= 2.0.0"
+  s.required_ruby_version = ">= 2.5.0"
 
   # We do not have a hard dependency on rack, it's possible to load
   # things which respond to #call.  HTTP status lines in responses