Switch to GitHub workflows. (#211)

.github/workflows/build.yml

@@ -0,0 +1,27 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: JDK ${{ matrix.java_version }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        java_version: [1.8]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Gradle Wrapper Validation
+        uses: gradle/wrapper-validation-action@v1
+
+      - name: Install JDK ${{ matrix.java_version }}
+        uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java_version }}
+
+      - name: Build with Gradle
+        run: ./gradlew build --stacktrace

.github/workflows/publish-release.yml

@@ -0,0 +1,34 @@
+name: Publish Release
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  publish:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Upload release
+        run: ./gradlew publishAllPublicationsToMavenCentralRepository --no-daemon --no-parallel
+        env:
+          ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+          ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+          ORG_GRADLE_PROJECT_signingInMemoryKey: ${{ secrets.SIGNING_PRIVATE_KEY }}
+          ORG_GRADLE_PROJECT_signingInMemoryKeyPassword: ${{ secrets.SIGNING_PASSWORD }}
+
+      - name: Publish release
+        run: ./gradlew closeAndReleaseRepository --no-daemon --no-parallel
+        env:
+          ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+          ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}

.github/workflows/publish-snapshot.yml

@@ -0,0 +1,31 @@
+name: Publish Snapshot
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  publish:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Retrieve version
+        run: |
+          echo "VERSION_NAME=$(cat gradle.properties | grep -w "VERSION_NAME" | cut -d'=' -f2)" >> $GITHUB_ENV
+
+      - name: Publish snapshot
+        run: ./gradlew publishAllPublicationsToMavenCentralRepository --no-daemon --no-parallel
+        if: endsWith(env.VERSION_NAME, '-SNAPSHOT')
+        env:
+          ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+          ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}