[ci] Verify supported JDK versions on master push

.github/workflows/check-supported-versions.yaml

@@ -0,0 +1,80 @@
+name: Check Supported Java Versions
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Build on JDK ${{ matrix.java }} and ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        java: [8, 11]
+        os: [ubuntu-latest]
+        include:
+          - java: 8
+            os: windows-latest
+          - java: 13
+            os: ubuntu-latest
+            # Need to update to Gradle version with v13 support in modules/openapi-generator-gradle-plugin/pom.xml
+            flags: -am -pl modules/openapi-generator-cli
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java }}
+
+      - uses: actions/cache@v1
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('pom.xml', 'modules/**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('modules/openapi-generator-gradle-plugin/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Build with Maven
+        shell: bash
+        run: mvn -nsu -B --quiet -Djacoco.skip=true -Dorg.slf4j.simpleLogger.defaultLogLevel=error --no-transfer-progress clean install --file pom.xml ${{ matrix.flags }}
+
+      - name: Test gradle
+        shell: bash
+        run: gradle -b modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle buildGoSdk --stacktrace
+
+      - name: Upload Maven build artifact
+        uses: actions/upload-artifact@v1
+        if: matrix.java == '8'
+        with:
+          name: artifact
+          path: modules/openapi-generator-cli/target/openapi-generator-cli.jar
+
+  verify:
+    name: Verifies integrity of the commit on ${{ matrix.os }}
+    needs: build
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+      - name: Download build artifact
+        uses: actions/download-artifact@v1
+        with:
+          name: artifact
+      - name: Run Ensures Script
+        run: |
+          mkdir -p modules/openapi-generator-cli/target/
+          mv artifact/openapi-generator-cli.jar modules/openapi-generator-cli/target/
+          ./bin/utils/ensure-up-to-date

README.md

@@ -8,6 +8,7 @@
 [![Windows Test](https://ci.appveyor.com/api/projects/status/github/openapitools/openapi-generator?branch=master&svg=true&passingText=Windows%20Test%20-%20OK&failingText=Windows%20Test%20-%20Fails)](https://ci.appveyor.com/project/WilliamCheng/openapi-generator-wh2wu)
 [![JDK11 Build](https://cloud.drone.io/api/badges/OpenAPITools/openapi-generator/status.svg?ref=refs/heads/master)](https://cloud.drone.io/OpenAPITools/openapi-generator)
 [![iOS Build Status](https://app.bitrise.io/app/4a2b10a819d12b67/status.svg?token=859FMDR8QHwabCzwvZK6vQ&branch=master)](https://app.bitrise.io/app/4a2b10a819d12b67)
+![Check Supported Java Versions](https://github.com/openapi-generator/openapi-generator/workflows/Check%20Supported%20Java%20Versions/badge.svg)
 
 </div>