Build gem against Ruby 3.0

Author: andyundso

.circleci/config.yml

@@ -173,6 +173,7 @@ workflows:
                 - '2.5'
                 - '2.6'
                 - '2.7'
+                - '3.0'
 
       - test_windows:
           matrix:
@@ -181,3 +182,4 @@ workflows:
                - '2.5'
                - '2.6'
                - '2.7'
+               - '3.0'

Rakefile

@@ -10,6 +10,7 @@ GEM_PLATFORM_HOSTS = {
   'x86-mingw32' => 'i686-w64-mingw32',
   'x64-mingw32' => 'x86_64-w64-mingw32'
 }
+RUBY_CC_VERSION='3.0.0:2.7.0:2.6.0:2.5.0:2.4.0'.freeze
 
 # Add our project specific files to clean for a rebuild
 CLEAN.include FileList["{ext,lib}/**/*.{so,#{RbConfig::CONFIG['DLEXT']},o}"],

tasks/native_gem.rake

@@ -9,6 +9,6 @@ task 'gem:windows' => ['ports:cross'] do
 
   # and finally build the native gem
   GEM_PLATFORM_HOSTS.keys.each do |plat|
-    RakeCompilerDock.sh "bundle --local && RUBY_CC_VERSION='2.7.0:2.6.0:2.5.0:2.4.0' CFLAGS='-Wall' MAKE='make -j`nproc`' rake native:#{plat} gem", platform: plat
+    RakeCompilerDock.sh "bundle --local && RUBY_CC_VERSION=#{RUBY_CC_VERSION} CFLAGS='-Wall' MAKE='make -j`nproc`' rake native:#{plat} gem", platform: plat
   end
 end

tasks/ports.rake

@@ -75,7 +75,7 @@ namespace :ports do
     GEM_PLATFORM_HOSTS.each do |gem_platform, host|
       # make sure to install our bundle
       build = ['bundle']
-      build << "rake ports:compile[#{host}] MAKE='make -j`nproc`'"
+      build << "RUBY_CC_VERSION=#{RUBY_CC_VERSION} rake ports:compile[#{host}] MAKE='make -j`nproc`'"
       RakeCompilerDock.sh build.join(' && '), platform: gem_platform
     end
   end