Add build, PR and publish workflows

Author: Virtlink

.github/workflows/build-master.yml

@@ -0,0 +1,34 @@
+name: Build master branch
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout latest code
+        uses: actions/checkout@v2
+
+      - name: Setup JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 8
+
+      - name: Setup build cache
+        uses: actions/cache@v2
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
+          restore-keys: ${{ runner.os }}-gradle-
+
+      - name: Build with Gradle
+        run: ./gradlew build
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v1
+        with:
+          name: Package
+          path: build/libs

.github/workflows/publish-release.yml

@@ -0,0 +1,35 @@
+name: Publish release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish-release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout latest code
+        uses: actions/checkout@v2
+
+      - name: Setup JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 8
+
+      - name: Setup build cache
+        uses: actions/cache@v2
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
+          restore-keys: ${{ runner.os }}-gradle-
+
+      - name: Publish artifact
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        # The GITHUB_REF tag comes in the format 'refs/tags/xxx'.
+        # So if we split on '/' and take the 3rd value, we can get the release name.
+        run: |
+          NEW_VERSION=$(echo "${GITHUB_REF}" | cut -d "/" -f3)
+          echo "New version: ${NEW_VERSION}"
+          echo "Github username: ${GITHUB_ACTOR}"
+          ./gradlew -Pversion=${NEW_VERSION} publish

.github/workflows/pull-request.yml

@@ -0,0 +1,26 @@
+name: Build pull request
+
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout latest code
+        uses: actions/checkout@v2
+
+      - name: Setup JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 8
+
+      - name: Setup build cache
+        uses: actions/cache@v2
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
+          restore-keys: ${{ runner.os }}-gradle-
+
+      - name: Build with Gradle
+        run: ./gradlew build