add a release pipeline

.github/workflows/release.yml

@@ -0,0 +1,35 @@
+name: Release CI
+
+on:
+  release:
+    types:
+      - published
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: 11
+          distribution: temurin
+
+      - name: Build with Gradle
+        run: |
+          ./gradlew -PideaVersion=${IDEA_VERSION} check buildPlugin
+        env:
+          - IDEA_VERSION: IC-2020.3
+
+      - name: Publish to Sonatype
+        env:
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+          SIGNING_KEY: ${{ secrets.SIGNING_KEY }}
+          SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
+        run: ./gradlew publish -PossrhToken="${SONATYPE_USERNAME}" -PossrhTokenPassword="${SONATYPE_PASSWORD}" -PsigningKey="${SIGNING_KEY}" -PsigningPassword="${SIGNING_PASSWORD}"

build.gradle

@@ -22,8 +22,8 @@ apply plugin: 'java'
 apply plugin: 'org.jetbrains.intellij'
 
 compileJava {
-    sourceCompatibility = '17'
-    targetCompatibility = '17'
+    sourceCompatibility = '11'
+    targetCompatibility = '11'
 }
 
 intellij {
@@ -40,7 +40,7 @@ repositories {
 
 dependencies {
     implementation("org.antlr:antlr4-runtime:$antlr4Version") {
-        exclude group:'com.ibm.icu', module:'icu4j'
+        exclude group: 'com.ibm.icu', module: 'icu4j'
     }
     antlr "org.antlr:antlr4:$antlr4Version"
 }
@@ -97,8 +97,8 @@ publishing {
         maven {
             url "https://oss.sonatype.org/${libraryVersion.contains("-SNAPSHOT") ? 'content/repositories/snapshots' : 'service/local/staging/deploy/maven2'}"
             credentials {
-		username = findProperty("ossrhToken") as String
-		password = findProperty("ossrhTokenPassword") as String
+                username = findProperty("ossrhToken") as String
+                password = findProperty("ossrhTokenPassword") as String
             }
         }
     }
@@ -110,7 +110,7 @@ signing {
 
 
 javadoc {
-    if(JavaVersion.current().isJava9Compatible()) {
+    if (JavaVersion.current().isJava9Compatible()) {
         options.addBooleanOption('html5', true)
     }
 }