[#494] Replace danger-ruby with danger-kotlin

Author: chornerman

.github/workflows/review_pull_request.yml

@@ -69,30 +69,7 @@ jobs:
         working-directory: ./template-compose
         run: ./gradlew koverMergedXmlReport
 
-      - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '2.7'
-
-      - name: Cache gems
-        uses: actions/cache@v2
-        with:
-          path: vendor/bundle
-          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-gems-
-
-      - name: Install Bundle and check environment versions
-        run: |
-          echo 'Install Bundle'
-          bundle config path vendor/bundle
-          bundle install
-          echo 'Check environment setup versions'
-          ruby --version
-          gem --version
-          bundler --version
-
       - name: Run Danger
+        uses: danger/kotlin@1.2.0
         env:
           DANGER_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: bundle exec danger

Dangerfile.df.kts

@@ -0,0 +1,27 @@
+import systems.danger.kotlin.*
+
+danger(args) {
+    onGitHub {
+        // Make it more obvious that a PR is a work in progress and shouldn't be merged yet
+        if (pullRequest.title.contains("WIP")) {
+            warn("PR is classed as Work in Progress")
+        }
+
+        // Warn to encourage a PR description
+        if (pullRequest.body.isBlank()) {
+            warn("Please provide a summary in the PR description to make it easier to review")
+        }
+
+        // Warn to encourage that labels should have been used on the PR
+        if (pullRequest.labels.isEmpty()) {
+            warn("Please add labels to this PR")
+        }
+    }
+
+    onGit {
+        // Warn when there is a big PR
+        if (lineOfCode > 500) {
+            warn("Big PR")
+        }
+    }
+}