Support a new publication scheme (#751)

Author: fzhinkin

build-logic/src/main/kotlin/kotlinx/kover/conventions/kover-publishing-conventions.gradle.kts

@@ -113,7 +113,7 @@ abstract class CollectTask: DefaultTask() {
 
 publishing {
     repositories {
-        addSonatypeRepository()
+        addPublishingRepositoryIfPresent()
 
         /**
          * Maven repository in build directory to store artifacts for using in functional tests.
@@ -142,12 +142,17 @@ afterEvaluate {
     }
 }
 
-fun RepositoryHandler.addSonatypeRepository() {
-    maven {
-        url = uri("https://oss.sonatype.org/service/local/staging/deploy/maven2/")
-        credentials {
-            username = acquireProperty("libs.sonatype.user")
-            password = acquireProperty("libs.sonatype.password")
+// Artifacts are published to an intermediate repo (libs.repo.url) first,
+// and then deployed to the central portal.
+fun RepositoryHandler.addPublishingRepositoryIfPresent() {
+    val repositoryUrl = acquireProperty("libs.repo.url")
+    if (!repositoryUrl.isNullOrBlank()) {
+        maven {
+            url = uri(repositoryUrl)
+            credentials {
+                username = acquireProperty("libs.repo.user")
+                password = acquireProperty("libs.repo.password")
+            }
         }
     }
 }