Add github action to publish packages to the Maven Central

Author: sink772

.github/workflows/maven_publish.yml

@@ -0,0 +1,24 @@
+name: Publish package to the Maven Central Repository
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Java
+        uses: actions/setup-java@v2
+        with:
+          java-version: '11'
+          distribution: 'adopt'
+      - name: Publish package
+        run: ./gradlew -Prelease publishToSonatype closeAndReleaseSonatypeStagingRepository
+        env:
+          STAGING_PROFILE_ID : ${{ secrets.STAGING_PROFILE_ID }}
+          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+          ORG_GRADLE_PROJECT_signingKey : ${{ secrets.SIGNING_KEY }}
+          ORG_GRADLE_PROJECT_signingPassword : ${{ secrets.SIGNING_PASSWORD }}

build.gradle

@@ -12,9 +12,9 @@ nexusPublishing {
     packageGroup = GROUP
     repositories {
         sonatype {
-            stagingProfileId = project.hasProperty('mavenProfileId') ? "$mavenProfileId" : ''
-            username = project.hasProperty('mavenCentralUsername') ? "$mavenCentralUsername" : ''
-            password = project.hasProperty('mavenCentralPassword') ? "$mavenCentralPassword" : ''
+            stagingProfileId = findProperty('mavenProfileId') ?: System.getenv("STAGING_PROFILE_ID")
+            username = findProperty('mavenCentralUsername') ?: System.getenv("OSSRH_USERNAME")
+            password = findProperty('mavenCentralPassword') ?: System.getenv("OSSRH_PASSWORD")
         }
     }
 }

unittest/build.gradle

@@ -89,5 +89,10 @@ publishing {
 
 signing {
     required rootProject.hasProperty('release')
+    if (rootProject.hasProperty('signingKey')) {
+        def signingKey = rootProject.findProperty("signingKey")
+        def signingPassword = rootProject.findProperty("signingPassword")
+        useInMemoryPgpKeys(signingKey, signingPassword)
+    }
     sign publishing.publications.mavenJava
 }