Modify rake task to prevent releasing a gem including binary files

Rakefile

@@ -4,12 +4,30 @@ require "bundler/gem_tasks"
 require "rake/testtask"
 require "etc" # make -j #{Etc.nprocessors}
 
+# Test
+
 task default: :test
 Rake::TestTask.new do |t|
   t.libs << "test"
   t.pattern = "test/**/*_test.rb"
 end
 
+# Release gem
+
+# Prevent releasing the gem including htslib shared library.
+
+task :check_shared_library_exist do
+  unless Dir.glob("vendor/*.{so,dylib}").empty?
+    magenta = "\e[35m"
+    clear = "\e[0m"
+    abort "#{magenta}Shared library exists in the vendor directory.#{clear}"
+  end
+end
+
+Rake::Task["release:guard_clean"].enhance(["check_shared_library_exist"])
+
+# Build htslib
+
 namespace :htslib do
   desc "Building HTSlib"
   task :build do