Adds Github CI.

.github/workflows/build.yaml

@@ -0,0 +1,63 @@
+name: Kotlin CI/CD
+
+on: [push]
+
+jobs:
+  build:
+    name: Build and Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11.0.4
+
+      - name: Build
+        env:
+          ORG_GRADLE_PROJECT_NEXUSUSERNAME: "${{ secrets.nexusUsername }}"
+          ORG_GRADLE_PROJECT_NEXUSPASSWORD: "${{ secrets.nexusPassword }}"
+          ORG_GRADLE_PROJECT_SIGNINGKEYID: "${{ secrets.signingKeyId }}"
+          ORG_GRADLE_PROJECT_SIGNINGPASSWORD: "${{ secrets.signingPassword }}"
+        run: ./gradlew clean && ./gradlew build
+
+      - name: Test
+        env:
+          ORG_GRADLE_PROJECT_NEXUSUSERNAME: "${{ secrets.nexusUsername }}"
+          ORG_GRADLE_PROJECT_NEXUSPASSWORD: "${{ secrets.nexusPassword }}"
+          ORG_GRADLE_PROJECT_SIGNINGKEYID: "${{ secrets.signingKeyId }}"
+          ORG_GRADLE_PROJECT_SIGNINGPASSWORD: "${{ secrets.signingPassword }}"
+        run: ./gradlew test
+
+  publish:
+    name: Publish to Maven Central
+    if: contains(github.ref, 'release/')
+    needs: build
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11.0.4
+
+      - name: Install GPG key
+        run: |
+          cat <(echo -e "${{ secrets.signingKey }}") | gpg --batch --import
+          gpg --list-secret-keys --keyid-format LONG
+
+      - name: Install gpg2
+        run: sudo apt-get install gnupg2 -y
+
+      - name: Publish artifact
+        env:
+          ORG_GRADLE_PROJECT_NEXUSUSERNAME: "${{ secrets.nexusUsername }}"
+          ORG_GRADLE_PROJECT_NEXUSPASSWORD: "${{ secrets.nexusPassword }}"
+          ORG_GRADLE_PROJECT_SIGNINGKEYID: "${{ secrets.signingKeyId }}"
+          ORG_GRADLE_PROJECT_SIGNINGPASSWORD: "${{ secrets.signingPassword }}"
+          GPG_TTY: $(tty)
+        run: ./gradlew publish

build.gradle

@@ -67,15 +67,21 @@ publishing {
     repositories {
         maven {
             credentials {
-                username project.nexusUsername
-                password project.nexusPassword
+                username project.NEXUSUSERNAME
+                password project.NEXUSPASSWORD
             }
             url = 'https://oss.sonatype.org/service/local/staging/deploy/maven2/'
         }
     }
 }
 
+allprojects {
+    ext."signing.gnupg.keyName" = project.SIGNINGKEYID
+    ext."signing.gnupg.passphrase" = project.SIGNINGPASSWORD
+}
+
 signing {
+    useGpgCmd()
     sign publishing.publications.mavenJava
 }
 

gradle.properties

@@ -1 +1,2 @@
-kotlin.code.style=official
+kotlin.code.style=official
+signing.gnupg.executable=gpg2