[CM-757] Create a SwiftLint Plugin for a Swift Package

Author: timthehelipilot

Package.swift

@@ -16,20 +16,28 @@ let package = Package(
             targets: ["YCatalogViewer"]
         )
     ],
-    dependencies: [
-        // Dependencies declare other packages that this package depends on.
-        // .package(url: /* package url */, from: "1.0.0"),
-    ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
         // Targets can depend on other targets in this package, and on products in packages this package depends on.
+        .binaryTarget(
+            name: "SwiftLintBinary",
+            url: "https://github.com/realm/SwiftLint/releases/download/0.47.1/SwiftLintBinary-macos.artifactbundle.zip",
+            checksum: "82ef90b7d76b02e41edd73423687d9cedf0bb9849dcbedad8df3a461e5a7b555"
+        ),
+        .plugin(
+            name: "SwiftLint",
+            capability: .buildTool(),
+            dependencies: ["SwiftLintBinary"]
+        ),
         .target(
             name: "YCatalogViewer",
-            dependencies: []
+            dependencies: [],
+            plugins: ["SwiftLint"]
         ),
         .testTarget(
             name: "YCatalogViewerTests",
-            dependencies: ["YCatalogViewer"]
+            dependencies: ["YCatalogViewer"],
+            plugins: ["SwiftLint"]
         )
     ]
 )

Plugins/SwiftLint/main.swift

@@ -0,0 +1,30 @@
+//
+//  main.swift
+//  YCatalogViewer
+//
+//  Created by Tim Barett on 7/20/22.
+//  Copyright © 2021 Y Media Labs. All rights reserved.
+//
+
+import PackagePlugin
+
+@main
+struct SwiftLint: BuildToolPlugin {
+    func createBuildCommands(context: PluginContext, target: Target) async throws -> [Command] {
+        [
+            .buildCommand(
+                displayName: "Linting \(target.name)...",
+                executable: try context.tool(named: "swiftlint").path,
+                arguments: [
+                    "lint",
+                    "--in-process-sourcekit",
+                    "--config",
+                    "\(context.package.directory.string)/.swiftlint.yml",
+                    "--path",
+                    target.directory.string
+                ],
+                environment: [:]
+            )
+        ]
+    }
+}