init.gradle file for proxying all repositories with Sonatype Nexus

init.gradle

/**
 * init.gradle file for development using Nexus as proxy repository
 * 
 * @author Manfred Moser <[email protected]
 */

apply plugin:NexusRepositoryPlugin

class NexusRepositoryPlugin implements Plugin<Gradle> {

  final static String LOG_PREFIX = "init.gradle/NexusRepositoryPlugin:"

  final Closure NexusConfig = {
    maven {
      name = 'standard-nexus'
      url = 'http://localhost:8081/nexus/content/groups/public'
    }
    // if required you can add further repositories or groups here and they will
    // be left intact if the name starts with standard-
    // although it is better to just add those repositories in Nexus 
    // and expose them via the public group
  }

  final Closure RepoHandler = {
    all { ArtifactRepository repo ->
      if (repo.name.toString().startsWith("standard-") ) {
         println "$LOG_PREFIX    $repo.name at $repo.url activated as repository."
      } else {
        if (repo instanceof MavenArtifactRepository) {
          remove repo
          println "$LOG_PREFIX    $repo.name at $repo.url removed."
        } else {
          println "$LOG_PREFIX    $repo.name kept (not a Maven repository)."
        }
      }
    }
  }

          
  void apply(Gradle gradle) {
    // Override all project specified Maven repos with standard defined in here
    gradle.allprojects{ project ->
      println "$LOG_PREFIX  Reconfiguring repositories and buildscript repositories."
      project.repositories RepoHandler
      project.buildscript.repositories RepoHandler

      // The minecraftforge repo has problems being proxied so we need to leave it in place directly.
      project.repositories NexusConfig
      project.buildscript.repositories NexusConfig
    }
  }
}

Great, it is working now. I just had to replace line 26 with

if (repo.name.toString().startsWith("standard-") || repo.name.toString().equals("forge")) {

Otherwise it excludes the forge repo which, as you noted in the code, can't be proxied as of yet. Adding standard- to the dependency is no good because then the script still removes forge from ForgeGradle even though it keeps the project forge repository correct.

Great, this is exactly what I was looking for, thanks!

To also be able to build Android Studio project with gradlew, I added the following lines to keep the local support repos replacing line 30/31:

if (!repo.url.toString().startsWith("http") &&
  repo.url.toString().contains("Android") ) {
  println "$LOG_PREFIX    $repo.name at $repo.url kept because local Android extras repo."
} else {
  remove repo
  println "$LOG_PREFIX    $repo.name at $repo.url removed."
}

Thank you very much. This is working for me. You save my day 😄