ci: automate releases with release-please and publish to RubyGems

.github/workflows/release.yml

@@ -0,0 +1,52 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  # Maintains a release PR that bumps lib/procodile/version.rb and the CHANGELOG
+  # from Conventional Commit messages. Merging that PR is what cuts a release.
+  release-please:
+    runs-on: ubuntu-latest
+    outputs:
+      release_created: ${{ steps.release-please.outputs.release_created }}
+      version: ${{ steps.release-please.outputs.version }}
+    steps:
+      - uses: googleapis/release-please-action@v4
+        id: release-please
+
+  release:
+    runs-on: ubuntu-latest
+    needs: [release-please]
+    if: ${{ needs.release-please.outputs.release_created }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.4'
+          bundler-cache: true
+
+      # The release workflow runs on master, after the release PR is merged, so
+      # nothing has re-run the suite against the merge result. Publishing is
+      # irreversible -- a pushed version number can be yanked but never reused --
+      # so gate the push on a green suite rather than assuming.
+      - name: Run tests
+        run: bundle exec rspec -Ilib
+
+      - name: Build gem
+        run: gem build *.gemspec
+
+      - name: Setup credentials
+        run: |
+          mkdir -p $HOME/.gem
+          touch $HOME/.gem/credentials
+          chmod 0600 $HOME/.gem/credentials
+          printf -- "---\n:rubygems_api_key: ${RUBYGEMS_API_KEY}\n" > $HOME/.gem/credentials
+        env:
+          RUBYGEMS_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}
+
+      - name: Publish to RubyGems
+        run: gem push *.gem

.gitignore

@@ -4,3 +4,4 @@ test-app/pids
 test-app/procodile.log
 global.yml
 *.gem
+Gemfile.lock

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "1.0.27"
+}

release-please-config.json

@@ -0,0 +1,27 @@
+{
+  "pull-request-header": ":robot: I have created a release",
+  "packages": {
+    ".": {
+      "release-type": "ruby",
+      "version-file": "lib/procodile/version.rb",
+      "changelog-path": "CHANGELOG.md",
+      "draft": false,
+      "prerelease": false
+    }
+  },
+  "changelog-sections": [
+    { "type": "feat", "section": "Features" },
+    { "type": "feature", "section": "Features" },
+    { "type": "fix", "section": "Bug Fixes" },
+    { "type": "perf", "section": "Performance Improvements" },
+    { "type": "revert", "section": "Reverts" },
+    { "type": "docs", "section": "Documentation" },
+    { "type": "style", "section": "Styles" },
+    { "type": "chore", "section": "Miscellaneous Chores" },
+    { "type": "refactor", "section": "Code Refactoring" },
+    { "type": "test", "section": "Tests", "hidden": true },
+    { "type": "build", "section": "Build System", "hidden": true },
+    { "type": "ci", "section": "Continuous Integration", "hidden": true }
+  ],
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"
+}