Change to prebuild command

Author: nicolas-christe

Package.swift

@@ -2,28 +2,22 @@
 import PackageDescription
 
 let package = Package(
-    name: "swiftlint",
-    platforms: [
-        .macOS(.v10_15),
-    ],
-    products: [
-        .plugin(
-            name: "swiftlint",
-            targets: ["swiftlint"]),
-    ],
-    dependencies: [
-    ],
-    targets: [
-        .binaryTarget(
-            name: "SwiftLintBinary",
-            url: "https://github.com/realm/SwiftLint/releases/download/0.50.0-rc.2/SwiftLintBinary-macos.artifactbundle.zip",
-            checksum: "c100354e0f6ea2531806df3199157e7e8a1eccb920d4da8e9a46f5f498aa4a6a"
-        ),
-        
-        .plugin(
-            name: "swiftlint",
-            capability: .buildTool(),
-            dependencies: ["SwiftLintBinary"],
-            path: "."),
-    ]
+  name: "SwiftLintPlugin",
+  products: [
+    .plugin(name: "SwiftLintPlugin", targets: ["SwiftLintPlugin"]),
+  ],
+  dependencies: [],
+  targets: [
+    .plugin(
+      name: "SwiftLintPlugin",
+      capability: .buildTool(),
+      dependencies: ["SwiftLintBinary"],
+      path: "."
+    ),
+    .binaryTarget(
+      name: "SwiftLintBinary",
+      url: "https://github.com/realm/SwiftLint/releases/download/0.52.4/SwiftLintBinary-macos.artifactbundle.zip",
+      checksum: "8a8095e6235a07d00f34a9e500e7568b359f6f66a249f36d12cd846017a8c6f5"
+    )
+  ]
 )

SwiftLintPlugin.swift

@@ -3,40 +3,51 @@ import PackagePlugin
 
 @main
 struct SwiftLintPlugin: BuildToolPlugin {
-    func createBuildCommands(
-        context: PackagePlugin.PluginContext,
-        target: PackagePlugin.Target
-    ) async throws -> [PackagePlugin.Command] {
-        [try buildCommand(tool: try context.tool(named: "swiftlint"), workingDirectory: context.pluginWorkDirectory,
-                          targetFiles: [target.directory])]
+    func createBuildCommands(context: PluginContext, target: Target) throws -> [Command] {
+        // get the config on the root if the target directory
+        return [try .SwiftLint(
+            tool: try context.tool(named: "swiftlint"),
+            outputDir: context.pluginWorkDirectory,
+            targetFiles: [target.directory.string])]
     }
 }
 
+
 #if canImport(XcodeProjectPlugin)
 import XcodeProjectPlugin
 
 extension SwiftLintPlugin: XcodeBuildToolPlugin {
-    func createBuildCommands(
-        context: XcodePluginContext,
-        target: XcodeTarget
-    ) throws -> [Command] {
-        [try buildCommand(tool: try context.tool(named: "swiftlint"), workingDirectory: context.pluginWorkDirectory,
-                          targetFiles:  target.inputFiles.map(\.path))]
+    func createBuildCommands(context: XcodePluginContext, target: XcodeTarget) throws -> [Command] {
+        return [try .SwiftLint(
+            tool: try context.tool(named: "swiftlint"),
+            outputDir: context.pluginWorkDirectory,
+            targetFiles: target.inputFiles.map(\.path.string).filter { $0.hasSuffix(".swift") })]
     }
 }
 #endif
 
-private func buildCommand(tool: PackagePlugin.PluginContext.Tool,
-                          workingDirectory: PackagePlugin.Path,
-                          targetFiles: [PackagePlugin.Path]) throws -> PackagePlugin.Command {
-    // create config in the working directory
-    let configFile = workingDirectory.appending("swiftlist.yml").string
-    try config.write(toFile: configFile, atomically: true, encoding: .utf8)
-    // create build command
-    var arguments = ["lint"]
-    arguments.append(contentsOf: ["--cache-path", "\(workingDirectory)"])
-    arguments.append(contentsOf: ["--config", "\(configFile)"])
-    arguments.append(contentsOf: targetFiles.map(\.string).filter {$0.hasSuffix(".swift")})
-    
-    return .buildCommand(displayName: "SwiftLint", executable: tool.path, arguments: arguments)
+private extension Command {
+    static func SwiftLint(tool: PackagePlugin.PluginContext.Tool, outputDir: PackagePlugin.Path,
+                          targetFiles: [String]) throws-> Command {
+        // generate configuration
+        let toolDir = outputDir.removingLastComponent().appending("SwiftLintPlugin-config")
+        try FileManager.default.createDirectory(atPath: toolDir.string, withIntermediateDirectories: true)
+        let configPath = toolDir.appending("swiftlist.yml").string
+        try config.write(toFile: configPath, atomically: true, encoding: .utf8)
+
+        var arguments = [
+            "lint",
+            "--cache-path", "\(outputDir)",
+            "--config", "\(configPath)",
+        ]
+        arguments.append(contentsOf: targetFiles)
+
+        return .prebuildCommand(
+            displayName: "swiftLint \(targetFiles)",
+            executable: tool.path,
+            arguments: arguments,
+            // We are not producing output files and this is needed only to not include cache files into bundle
+            outputFilesDirectory: outputDir.appending("Output")
+        )
+    }
 }