Use Rubygems Trusted Publishers to publish

.github/workflows/publish.yml

@@ -0,0 +1,41 @@
+name: Publish
+on:
+  push:
+    branches: master
+    paths: lib/rubocop/rspec/version.rb
+jobs:
+  publish:
+    name: Publish to RubyGems
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      id-token: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+          ruby-version: ruby
+      - uses: rubygems/release-gem@v1
+      - name: Create a GitHub release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          bundle exec rake create_release_notes
+          gh release create $(git tag --points-at @) \
+            --title "RuboCop RSpec $(git tag --points-at @)" \
+            --notes-file relnotes.md
+      - name: Replace version in Antora config
+        run: |
+          sed -i 's/version:.*$/version: ~/' docs/antora.yml
+          if ! git diff --exit-code docs/antora.yml; then
+            git config user.name "${GITHUB_ACTOR}"
+            git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
+            git checkout -b switch-docs-version
+            git add docs/antora.yml
+            git commit -m "Switch docs version back"
+            git push -u origin switch-docs-version
+            gh pr create --fill --head switch-docs-version
+          fi

.gitignore

@@ -23,3 +23,5 @@ coverage
 
 # vscode generated
 .vscode
+
+/relnotes.md

tasks/create_release_notes.rake

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+desc 'Create release notes for the most recent version.'
+task :create_release_notes do
+  CreateReleaseNotes.call
+end
+
+# Create release notes from the most recent version in the CHANGELOG.md file.
+module CreateReleaseNotes
+  module_function
+
+  def call
+    release_notes = new_version_changes.strip
+    contributor_links = user_links(release_notes)
+
+    File.open('relnotes.md', 'w') do |file|
+      file << release_notes
+      file << "\n\n"
+      file << contributor_links
+      file << "\n"
+    end
+  end
+
+  def new_version_changes
+    changelog = File.read('CHANGELOG.md')
+    _, _, new_changes, _older_changes = changelog.split(/^## .*$/, 4)
+    new_changes
+  end
+
+  def user_links(text)
+    names = text.scan(/\[@(\S+)\]/).map(&:first).uniq.sort
+    names.map { |name| "[@#{name}]: https://github.com/#{name}" }.join("\n")
+  end
+end