Update release.gradle for maven publication

Author: belemaire

ReactAndroid/release.gradle

@@ -20,6 +20,18 @@ def isReleaseBuild() {
     return VERSION_NAME.contains("SNAPSHOT") == false
 }
 
+def getRepositoryUrl() {
+    return project.findProperty("repositoryUrl") ?: "https://oss.sonatype.org/service/local/staging/deploy/maven2/"
+}
+
+def getRepositoryUsername() {
+    return project.findProperty("repositoryUsername") ?: ""
+}
+
+def getRepositoryPassword() {
+    return project.findProperty("repositoryPassword") ?: ""
+}
+
 def configureReactNativePom(def pom) {
     pom.project {
         name(POM_NAME)
@@ -72,9 +84,28 @@ afterEvaluate { project ->
 
     signing {
         required { isReleaseBuild() && gradle.taskGraph.hasTask("uploadArchives") }
+        useGpgCmd()
         sign(configurations.archives)
     }
 
+     uploadArchives {
+        configuration = configurations.archives
+        repositories.mavenDeployer {
+            beforeDeployment {
+                MavenDeployment deployment -> signing.signPom(deployment)
+            }
+
+            repository(url: getRepositoryUrl()) {
+                authentication(
+                        userName: getRepositoryUsername(),
+                        password: getRepositoryPassword())
+
+            }
+
+            configureReactNativePom(pom)
+        }
+    }
+
     task installArchives(type: Upload) {
         configuration = configurations.archives
         repositories.mavenDeployer {