Add repositories configuration option in swift-java.config

Author: bo2themax

Sources/SwiftJavaConfigurationShared/Configuration.swift

@@ -80,6 +80,8 @@ public struct Configuration: Codable {
 
   // Java dependencies we need to fetch for this target.
   public var dependencies: [JavaDependencyDescriptor]?
+  // Java repositories for this target when fetching dependencies.
+  public var repositories: [JavaRepositoryDescriptor]?
 
   public init() {
   }
@@ -133,6 +135,41 @@ public struct JavaDependencyDescriptor: Hashable, Codable {
   }
 }
 
+/// Descriptor for [repositories](https://docs.gradle.org/current/userguide/supported_repository_types.html#sec:maven-repo)
+public struct JavaRepositoryDescriptor: Hashable, Codable {
+  public enum RepositoryType: String, Codable {
+    case mavenLocal, mavenCentral
+    case maven // TODO: ivy .. https://docs.gradle.org/current/userguide/supported_repository_types.html#sec:maven-repo
+  }
+
+  public var type: RepositoryType
+  public var url: String?
+  public var artifactUrls: [String]?
+
+  public init(type: RepositoryType, url: String? = nil, artifactUrls: [String]? = nil) {
+    self.type = type
+    self.url = url
+    self.artifactUrls = artifactUrls
+  }
+
+  public var descriptionGradleStyle: String? {
+    switch type {
+    case .mavenLocal, .mavenCentral:
+      return "\(type.rawValue)()"
+    case .maven:
+      guard let url else {
+        return nil
+      }
+      return """
+        maven {
+          url "\(url)"
+          \((artifactUrls ?? []).map({ "artifactUrls(\($0))" }).joined(separator: "\n"))
+        }
+        """
+    }
+  }
+}
+
 public func readConfiguration(sourceDir: String, file: String = #fileID, line: UInt = #line) throws -> Configuration? {
   // Workaround since filePath is macOS 13
   let sourcePath =

Sources/SwiftJavaTool/Commands/ResolveCommand.swift

@@ -75,8 +75,19 @@ extension SwiftJava.ResolveCommand {
       return
     }
 
+    var repositoriesToResolve: [JavaRepositoryDescriptor] = []
+
+    if let repositories = config.repositories {
+      repositoriesToResolve += repositories
+    }
+
+    if !repositoriesToResolve.contains(where: { $0.type == .mavenCentral }) {
+      // swift-java dependencies are originally located in mavenCentral
+      repositoriesToResolve.append(JavaRepositoryDescriptor(type: .mavenCentral))
+    }
+
     let dependenciesClasspath =
-      try await resolveDependencies(swiftModule: swiftModule, dependencies: dependenciesToResolve)
+      try await resolveDependencies(swiftModule: swiftModule, dependencies: dependenciesToResolve, repositories: repositoriesToResolve)
 
     // FIXME: disentangle the output directory from SwiftJava and then make it a required option in this Command
     guard let outputDirectory = self.commonOptions.outputDirectory else {
@@ -99,12 +110,13 @@ extension SwiftJava.ResolveCommand {
   ///
   /// - Throws: 
   func resolveDependencies(
-    swiftModule: String, dependencies: [JavaDependencyDescriptor]
+    swiftModule: String, dependencies: [JavaDependencyDescriptor],
+    repositories: [JavaRepositoryDescriptor]
   ) async throws -> ResolvedDependencyClasspath {
     let deps = dependencies.map { $0.descriptionGradleStyle }
     print("[debug][swift-java] Resolve and fetch dependencies for: \(deps)")
 
-    let dependenciesClasspath = await resolveDependencies(dependencies: dependencies)
+    let dependenciesClasspath = await resolveDependencies(dependencies: dependencies, repositories: repositories)
     let classpathEntries = dependenciesClasspath.split(separator: ":")
 
     print("[info][swift-java] Resolved classpath for \(deps.count) dependencies of '\(swiftModule)', classpath entries: \(classpathEntries.count), ", terminator: "")
@@ -119,10 +131,11 @@ extension SwiftJava.ResolveCommand {
 
 
   /// Resolves maven-style dependencies from swift-java.config under temporary project directory.
-  /// 
+  ///  
   /// - Parameter dependencies: maven-style dependencies to resolve
+  /// - Parameter repositories: maven-style repositories to resolve
   /// - Returns: Colon-separated classpath
-  func resolveDependencies(dependencies: [JavaDependencyDescriptor]) async -> String {
+  func resolveDependencies(dependencies: [JavaDependencyDescriptor], repositories: [JavaRepositoryDescriptor]) async -> String {
     let workDir = URL(fileURLWithPath: FileManager.default.currentDirectoryPath)
       .appendingPathComponent(".build")
     let resolverDir = try! createTemporaryDirectory(in: workDir)
@@ -135,7 +148,7 @@ extension SwiftJava.ResolveCommand {
 
     try! copyGradlew(to: resolverDir)
 
-    try! printGradleProject(directory: resolverDir, dependencies: dependencies)
+    try! printGradleProject(directory: resolverDir, dependencies: dependencies, repositories: repositories)
 
     if #available(macOS 15, *) {
       let process = try! await _Subprocess.run(
@@ -173,14 +186,16 @@ extension SwiftJava.ResolveCommand {
   }
 
   /// Creates Gradle project files (build.gradle, settings.gradle.kts) in temporary directory.
-  func printGradleProject(directory: URL, dependencies: [JavaDependencyDescriptor]) throws {
+  func printGradleProject(directory: URL, dependencies: [JavaDependencyDescriptor], repositories: [JavaRepositoryDescriptor]) throws {
     let buildGradle = directory
       .appendingPathComponent("build.gradle", isDirectory: false)
 
     let buildGradleText =
       """
       plugins { id 'java-library' }
-      repositories { mavenCentral() }
+      repositories { 
+          \(repositories.compactMap(\.descriptionGradleStyle).joined(separator: "\n"))
+      }
 
       dependencies {
         \(dependencies.map({ dep in "implementation(\"\(dep.descriptionGradleStyle)\")" }).joined(separator: ",\n"))