Provision SwiftLint using SwiftPM instead of CocoaPods

.gitignore

@@ -51,3 +51,6 @@ build/
 # not encrypted should be ignored
 .configure-files/*
 !.configure-files/*.enc
+
+# Swift Package Manager
+.build

.swiftlint.yml

@@ -1,7 +1,8 @@
-swiftlint_version: 0.54.0
+swiftlint_version: 0.58.2
 
 # Project configuration
 excluded:
+  - BuildTools/.build
   - Pods
   - fastlane
   - vendor

BuildTools/Empty.swift

@@ -0,0 +1,2 @@
+// Here only to satisfy SwiftPM requirement.
+// See https://github.com/nicklockwood/SwiftFormat#1-create-a-buildtools-folder-and-packageswift

BuildTools/Package.swift

@@ -0,0 +1,37 @@
+// swift-tools-version:6.0
+import Foundation
+import PackageDescription
+
+let package = Package(
+    name: "BuildTools",
+    platforms: [.macOS(.v10_13)],
+    dependencies: [
+        .package(url: "https://github.com/SimplyDanny/SwiftLintPlugins", exact: loadSwiftLintVersion()),
+    ],
+    targets: [.target(name: "BuildTools", path: "")]
+)
+
+func loadSwiftLintVersion() -> Version {
+    let swiftLintConfigURL = URL(fileURLWithPath: #filePath)
+        .deletingLastPathComponent()
+        .appendingPathComponent("..")
+        .appendingPathComponent(".swiftlint.yml")
+
+    guard let yamlString = try? String(contentsOf: swiftLintConfigURL) else {
+        fatalError("Failed to read SwiftLint config file at \(swiftLintConfigURL).")
+    }
+
+    guard let versionLine = yamlString.components(separatedBy: .newlines)
+        .first(where: { $0.contains("swiftlint_version") }) else {
+        fatalError("SwiftLint version not found in YAML file.")
+    }
+
+    // Assumes the format `swiftlint_version: <version>`
+    guard let version = Version(versionLine.components(separatedBy: ":")
+        .last?
+        .trimmingCharacters(in: .whitespaces) ?? "") else {
+        fatalError("Failed to extract SwiftLint version.")
+    }
+
+    return version
+}

Podfile

@@ -10,22 +10,6 @@ APP_MACOS_DEPLOYMENT_TARGET = Gem::Version.new('10.14')
 platform :osx, APP_MACOS_DEPLOYMENT_TARGET
 workspace 'Simplenote.xcworkspace'
 
-## Tools
-## ===================
-##
-
-def swiftlint_version
-  require 'yaml'
-
-  YAML.load_file('.swiftlint.yml')['swiftlint_version']
-end
-
-abstract_target 'Tools' do
-  pod 'SwiftLint', swiftlint_version
-end
-
-# Main
-#
 abstract_target 'Automattic' do
   # Automattic Shared
   #

Podfile.lock

@@ -10,21 +10,17 @@ PODS:
   - Simperium-OSX/SocketRocket (1.9.0)
   - Simperium-OSX/SPReachability (1.9.0)
   - Simperium-OSX/SSKeychain (1.9.0)
-  - SwiftLint (0.54.0)
 
 DEPENDENCIES:
   - Simperium-OSX (= 1.9.0)
-  - SwiftLint (= 0.54.0)
 
 SPEC REPOS:
   trunk:
     - Simperium-OSX
-    - SwiftLint
 
 SPEC CHECKSUMS:
   Simperium-OSX: bc465c8830e5b731e2489085459acc96160104d6
-  SwiftLint: c1de071d9d08c8aba837545f6254315bc900e211
 
-PODFILE CHECKSUM: 140e8361cb81c6afb2b16d5514e4d7e21625c066
+PODFILE CHECKSUM: b98f85d8c881bec495fc7801fd8eca2e94535f19
 
 COCOAPODS: 1.16.2

Rakefile

@@ -16,6 +16,18 @@ LOCAL_PATH = 'vendor/bundle'
 
 task default: %w[test]
 
+desc 'Checks the source for style errors'
+task :lint do
+  swiftlint
+end
+
+namespace :lint do
+  desc 'Automatically corrects style errors where possible'
+  task :autocorrect do
+    swiftlint(additional_args: ['--fix'])
+  end
+end
+
 desc 'Install required dependencies'
 task dependencies: %w[dependencies:check]
 
@@ -242,3 +254,16 @@ def check_dependencies_hook
     exit 1
   end
 end
+
+def swiftlint(additional_args: [])
+  run_package_plugin(cmd: "swiftlint --working-directory .. --quiet #{additional_args.join(' ')}")
+end
+
+def run_package_plugin(cmd:)
+  run_in_build_tools(cmd: "swift package plugin --allow-writing-to-directory .. --allow-writing-to-package-directory #{cmd}")
+end
+
+# We could use more idiomatic Ruby here, with `Dir.chdir`, but leaving as raw shell commands for when we'll drop Ruby and rake for tooling.
+def run_in_build_tools(cmd:)
+  sh "pushd BuildTools && export SDKROOT=$(xcrun --sdk macosx --show-sdk-path) && #{cmd} && popd"
+end

Simplenote.xcodeproj/project.pbxproj

@@ -1932,10 +1932,14 @@
 			inputFileListPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-Automattic-SimplenoteTests/Pods-Automattic-SimplenoteTests-frameworks-${CONFIGURATION}-input-files.xcfilelist",
 			);
+			inputPaths = (
+			);
 			name = "[CP] Embed Pods Frameworks";
 			outputFileListPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-Automattic-SimplenoteTests/Pods-Automattic-SimplenoteTests-frameworks-${CONFIGURATION}-output-files.xcfilelist",
 			);
+			outputPaths = (
+			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
 			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Automattic-SimplenoteTests/Pods-Automattic-SimplenoteTests-frameworks.sh\"\n";
@@ -1971,10 +1975,14 @@
 			inputFileListPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-Automattic-Simplenote/Pods-Automattic-Simplenote-frameworks-${CONFIGURATION}-input-files.xcfilelist",
 			);
+			inputPaths = (
+			);
 			name = "[CP] Embed Pods Frameworks";
 			outputFileListPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-Automattic-Simplenote/Pods-Automattic-Simplenote-frameworks-${CONFIGURATION}-output-files.xcfilelist",
 			);
+			outputPaths = (
+			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
 			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Automattic-Simplenote/Pods-Automattic-Simplenote-frameworks.sh\"\n";
@@ -2039,7 +2047,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "[ $CI ] && exit 0\n./Pods/SwiftLint/swiftlint\n\n";
+			shellScript = "[ $CI ] && exit 0\nrake lint\n\n";
 		};
 /* End PBXShellScriptBuildPhase section */
 

readme.md

@@ -33,7 +33,8 @@ Hopefully, you won't need to update Sparkle till version 2.x has shipped but, in
 
 #### SwiftLint
 
-We use [SwiftLint](https://github.com/realm/SwiftLint) to enforce a common style for Swift code. If you plan to write code, SwiftLint is going to be installed when you run `bundle exec pod install` and SwiftLint will run during the build.
+We use [SwiftLint](https://github.com/realm/SwiftLint) to enforce a common style for Swift code. If you plan to write code, SwiftLint is going to be installed when you run a build from Xcode.
+
 No commit should have lint warnings or errors.
 
 ### Open Xcode