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diff --git a/rubygem-importmap-rails.spec b/rubygem-importmap-rails.spec
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@@ -0,0 +1,85 @@
+%global gem_name importmap-rails
+
+Name: rubygem-%{gem_name}
+Version: 1.0.3
+Release: 1
+Summary: Manage modern JavaScript in Rails without transpiling or bundling
+License: MIT
+URL: https://github.com/rails/importmap-rails
+Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
+# To get the test suite:
+# git clone https://github.com/rails/importmap-rails.git --no-checkout
+# git -C importmap-rails archive -v -o importmap-rails-1.0.3-tests.txz v1.0.3 test/
+Source1: %{gem_name}-%{version}%{?prerelease}-tests.txz
+
+BuildRequires: ruby
+BuildRequires: ruby(release)
+BuildRequires: rubygem(bundler)
+BuildRequires: rubygem(rails)
+BuildRequires: rubygem(sqlite3)
+BuildRequires: rubygems-devel rubygem(did_you_mean)
+BuildArch: noarch
+# Bundles ES Module Shims
+# app/assets/javascripts/es-module-shims.js
+Provides: bundled(es-module-shims) = 1.4.1
+
+%description
+Use ESM with importmap to manage modern JavaScript in Rails without
+transpiling or bundling.
+
+
+%package doc
+Summary: Documentation for %{name}
+Requires: %{name} = %{version}-%{release}
+BuildArch: noarch
+
+%description doc
+Documentation for %{name}.
+
+%prep
+%setup -q -n %{gem_name}-%{version} -b1
+
+%build
+gem build ../%{gem_name}-%{version}.gemspec
+%gem_install
+
+%install
+mkdir -p %{buildroot}%{gem_dir}
+cp -a .%{gem_dir}/* \
+        %{buildroot}%{gem_dir}/
+
+%check
+pushd .%{gem_instdir}
+ln -s %{_builddir}/test
+
+echo 'gem "rails"' >> Gemfile
+echo 'gem "sqlite3"' >> Gemfile
+
+# Test requires network access
+mv test/packager_integration_test.rb{,.disable}
+
+export BUNDLE_GEMFILE="$(pwd)/Gemfile"
+
+# Tests require building rails app (currently fails)
+echo > test/dummy/config/initializers/assets.rb
+mv test/importmap_test.rb{,.disable}
+
+ruby -Ilib:test -rbundler -e 'Dir.glob "./test/**/*_test.rb", &method(:require)'
+popd
+
+%files
+%dir %{gem_instdir}
+%license %{gem_instdir}/MIT-LICENSE
+%{gem_instdir}/app
+%{gem_libdir}
+%exclude %{gem_cache}
+%{gem_spec}
+
+%files doc
+%doc %{gem_docdir}
+%doc %{gem_instdir}/README.md
+%{gem_instdir}/Rakefile
+
+%changelog
+* Wed Jan 18 2023 wangkai <wangkai385@h-partners.com> - 1.0.3-1
+- Init package