[Feature #21264] Replace C extension with pure Ruby implementation for Ruby >= 3.3

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
     uses: ruby/actions/.github/workflows/ruby_versions.yml@master
     with:
       engine: cruby
-      min_version: 2.6
+      min_version: 3.3
 
   build:
     if: ${{ startsWith(github.repository, 'ruby/') || github.event_name != 'schedule' }}
@@ -40,7 +40,5 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true # 'bundle install' and cache
-    - run: choco install gperf
-      if: ${{ matrix.ruby == 'mswin' }}
     - name: Run test
-      run: bundle exec rake compile test
+      run: bundle exec rake test

.github/workflows/update.yml

@@ -12,14 +12,13 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: Set up Ruby
-      run: sudo apt-get --no-install-recommends -q -y install ruby-dev gperf
+      run: sudo apt-get --no-install-recommends -q -y install ruby-dev
     - name: Install dependencies
       run: sudo gem install --no-document nokogiri
     - name: Update zonetab
       working-directory: ext/date
       run: |
         make -f prereq.mk update-zonetab
-        make -f prereq.mk zonetab.h
       env:
         top_srcdir: ../..
         srcdir: .
@@ -31,7 +30,7 @@ jobs:
         echo "diff=true" >> $GITHUB_OUTPUT
     - name: Commit
       run: |
-        git commit --message="Update zonetab.h at $(date +%F)" ext/date
+        git commit --message="Update zonetab at $(date +%F)" ext/date lib/date/zonetab.rb
         git pull --ff-only origin ${GITHUB_REF#refs/heads/}
         git push origin ${GITHUB_REF#refs/heads/}
       env:

Rakefile

@@ -1,30 +1,14 @@
 require "bundler/gem_tasks"
 require "rake/testtask"
-require "shellwords"
-require "rake/extensiontask"
-
-extask = Rake::ExtensionTask.new("date") do |ext|
-  ext.name = "date_core"
-  ext.lib_dir.sub!(%r[(?=/|\z)], "/#{RUBY_VERSION}/#{ext.platform}")
-end
 
+# Pure Ruby — no compilation needed
 Rake::TestTask.new(:test) do |t|
-  t.libs << extask.lib_dir
+  t.libs << "lib"
   t.libs << "test/lib"
   t.ruby_opts << "-rhelper"
   t.test_files = FileList['test/**/test_*.rb']
 end
 
-task compile: "ext/date/zonetab.h"
-file "ext/date/zonetab.h" => "ext/date/zonetab.list" do |t|
-  dir, hdr = File.split(t.name)
-  make_program_name =
-    ENV['MAKE'] || ENV['make'] ||
-    RbConfig::CONFIG['configure_args'][/with-make-prog\=\K\w+/] ||
-    (/mswin/ =~ RUBY_PLATFORM ? 'nmake' : 'make')
-  make_program = Shellwords.split(make_program_name)
-  sh(*make_program, "-f", "prereq.mk", "top_srcdir=.."+"/.."*dir.count("/"),
-     hdr, chdir: dir)
-end
+task :compile  # no-op, kept for compatibility
 
 task :default => [:compile, :test]

date.gemspec

@@ -1,31 +1,19 @@
 # frozen_string_literal: true
 
-version = File.foreach(File.expand_path("../lib/date.rb", __FILE__)).find do |line|
-  /^\s*VERSION\s*=\s*["'](.*)["']/ =~ line and break $1
-end
+require_relative "lib/date/version"
 
 Gem::Specification.new do |s|
   s.name = "date"
-  s.version = version
+  s.version = Date::VERSION
   s.summary = "The official date library for Ruby."
   s.description = "The official date library for Ruby."
 
-  if Gem::Platform === s.platform and s.platform =~ 'java' or RUBY_ENGINE == 'jruby'
-    s.platform = 'java'
-    # No files shipped, no require path, no-op for now on JRuby
-  else
-    s.require_path = %w{lib}
+  s.require_path = %w{lib}
 
-    s.files = [
-      "README.md", "COPYING", "BSDL",
-      "lib/date.rb", "ext/date/date_core.c", "ext/date/date_parse.c", "ext/date/date_strftime.c",
-      "ext/date/date_strptime.c", "ext/date/date_tmx.h", "ext/date/extconf.rb", "ext/date/prereq.mk",
-      "ext/date/zonetab.h", "ext/date/zonetab.list"
-    ]
-    s.extensions = "ext/date/extconf.rb"
-  end
+  s.files = Dir["README.md", "COPYING", "BSDL", "lib/**/*.rb",
+                "ext/date/prereq.mk", "ext/date/zonetab.list"]
 
-  s.required_ruby_version = ">= 2.6.0"
+  s.required_ruby_version = ">= 3.3.0"
 
   s.authors = ["Tadayoshi Funaba"]
   s.email = [nil]