Use Subprocess instead of Shwift

Drop Shwift: it is incompatible with musl (used by the Swift static
linking SDK), and its API is not meaningfully more concise than
Subprocess upon closer inspection.

Package.resolved

@@ -1,5 +1,5 @@
 {
-  "originHash" : "0cb2e87817f52021ac25ffee6b27396f6d94e9fd604ca83db7f20a10e65fe6cf",
+  "originHash" : "17ce26ba5c862ca674cd3ceeb43a9fe8a5c5251c5561de65e632a06d79916342",
   "pins" : [
     {
       "identity" : "noora",
@@ -28,22 +28,13 @@
         "version" : "4.2.1"
       }
     },
-    {
-      "identity" : "shwift",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/GeorgeLyon/Shwift",
-      "state" : {
-        "revision" : "d7be04898d094ddce6140cc6a2e9a83fc994b66d",
-        "version" : "3.1.1"
-      }
-    },
     {
       "identity" : "swift-argument-parser",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/swift-argument-parser",
       "state" : {
-        "revision" : "c5d11a805e765f52ba34ec7284bd4fcd6ba68615",
-        "version" : "1.7.0"
+        "revision" : "626b5b7b2f45e1b0b1c6f4a309296d1d21d7311b",
+        "version" : "1.7.1"
       }
     },
     {
@@ -82,6 +73,15 @@
         "version" : "2.95.0"
       }
     },
+    {
+      "identity" : "swift-subprocess",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/swiftlang/swift-subprocess.git",
+      "state" : {
+        "revision" : "ba5888ad7758cbcbe7abebac37860b1652af2d9c",
+        "version" : "0.3.0"
+      }
+    },
     {
       "identity" : "swift-system",
       "kind" : "remoteSourceControl",

Package.swift

@@ -11,10 +11,11 @@ let package = Package(
 		)
 	],
 	dependencies: [
+		.package(url: "https://github.com/apple/swift-argument-parser", from: "1.7.1"),
 		.package(url: "https://github.com/apple/swift-log", from: "1.10.1"),
 		.package(url: "https://github.com/apple/swift-nio", from: "2.95.0"),
 		.package(url: "https://github.com/apple/swift-system", from: "1.6.4"),
-		.package(url: "https://github.com/GeorgeLyon/Shwift", from: "3.1.1"),
+		.package(url: "https://github.com/swiftlang/swift-subprocess.git", from: "0.3.0"),
 		.package(url: "https://github.com/tuist/Noora", from: "0.55.1")
 	],
 	targets: [
@@ -38,9 +39,10 @@ let package = Package(
 		.executableTarget(
 			name: "InotifyTaskCLI",
 			dependencies: [
+				.product(name: "ArgumentParser", package: "swift-argument-parser"),
 				.product(name: "Logging", package: "swift-log"),
 				.product(name: "_NIOFileSystem", package: "swift-nio"),
-				.product(name: "Script", package: "Shwift"),
+				.product(name: "Subprocess", package: "swift-subprocess"),
 				.product(name: "Noora", package: "Noora")
 			],
 			path: "Sources/TaskCLI"

Sources/TaskCLI/Command.swift

@@ -1,4 +1,4 @@
-import Script
+import ArgumentParser
 
 @main
 struct Command: AsyncParsableCommand {

Sources/TaskCLI/Docker.swift

@@ -0,0 +1,9 @@
+struct Docker {
+	static func getLinuxPlatformStringWithHostArchitecture() -> String {
+		#if arch(x86_64)
+		return "linux/amd64"
+		#else
+		return "linux/arm64"
+		#endif
+	}
+}

Sources/TaskCLI/GenerateDocumentation Command.swift

@@ -1,9 +1,10 @@
+import ArgumentParser
 import Foundation
 import Logging
-import Script
 import Noora
+import Subprocess
 
-struct GenerateDocumentationCommand: Script {
+struct GenerateDocumentationCommand: AsyncParsableCommand {
 	static let configuration = CommandConfiguration(
 		commandName: "generate-documentation",
 		abstract: "Generate DocC documentation of all targets inside a Linux container.",
@@ -23,7 +24,6 @@ struct GenerateDocumentationCommand: Script {
 		let logger = global.makeLogger(labeled: "swift-inotify.cli.task.generate-documentation")
 		let fileManager = FileManager.default
 		let projectDirectory = URL(fileURLWithPath: fileManager.currentDirectoryPath)
-		let docker = try await executable(named: "docker")
 
 		let targets = try await Self.targets(for: projectDirectory)
 
@@ -42,16 +42,21 @@ struct GenerateDocumentationCommand: Script {
 		let script = Self.makeRunScript(for: targets)
 
 		logger.debug("Container script", metadata: ["script": "\(script)"])
-		do {
-			try await docker(
+		let dockerRunResult = try await Subprocess.run(
+			.name("docker"),
+			arguments: [
 				"run", "--rm",
 				"-v", "\(tempDirectory.path):/code",
-				"--platform", "linux/arm64",
+				"-v", "swift-inotify-build-cache:/code/.build",
+				"--platform", Docker.getLinuxPlatformStringWithHostArchitecture(),
 				"-w", "/code",
 				"swift:latest",
-				"/bin/bash", "-c", script,
-			)
-		} catch {
+				"/bin/bash", "-c", script
+			],
+			output: .standardOutput,
+			error: .standardError
+		)
+		if !dockerRunResult.terminationStatus.isSuccess {
 			noora.error("Documentation generation failed.")
 			return
 		}
@@ -103,10 +108,12 @@ struct GenerateDocumentationCommand: Script {
 	}
 
 	private static func packageTargets() async throws -> [(name: String, path: String)] {
-		let swift = try await executable(named: "swift")
-		let packageDescriptionOutput = try await outputOf {
-			try await swift("package", "describe", "--type", "json")
-		}
+		let packageDescriptionResult = try await Subprocess.run(
+			.name("swift"),
+			arguments: ["package", "describe", "--type", "json"],
+			output: .data(limit: 10_000),
+			error: .standardError
+		)
 
 		struct PackageDescription: Codable {
 			let targets: [Target]
@@ -116,8 +123,11 @@ struct GenerateDocumentationCommand: Script {
 			let path: String
 		}
 
-		let data = Data(packageDescriptionOutput.utf8)
-		let package = try JSONDecoder().decode(PackageDescription.self, from: data)
+		if !packageDescriptionResult.terminationStatus.isSuccess {
+			throw GenerateDocumentationError.unableToReadPackageDescription
+		}
+
+		let package = try JSONDecoder().decode(PackageDescription.self, from: packageDescriptionResult.standardOutput)
 		return package.targets.map { ($0.name, $0.path) }
 	}
 
@@ -162,13 +172,16 @@ struct GenerateDocumentationCommand: Script {
 	// MARK: - Dependency Injection
 
 	private func injectDoccPluginDependency(in directory: URL, logger: Logger) async throws {
-		let swift = try await executable(named: "swift")
-		do {
-			try await swift(
+		let swiftRunResult = try await Subprocess.run(
+			.name("swift"),
+			arguments: [
 				"package", "--package-path", directory.path(percentEncoded: false),
 				"add-dependency", "--from", Self.doccPluginMinVersion, Self.doccPluginURL
-			)
-		} catch {
+			],
+			output: .standardOutput,
+			error: .standardError
+		)
+		if !swiftRunResult.terminationStatus.isSuccess {
 			throw GenerateDocumentationError.dependencyInjectionFailed
 		}
 
@@ -178,11 +191,14 @@ struct GenerateDocumentationCommand: Script {
 
 enum GenerateDocumentationError: Error, CustomStringConvertible {
 	case dependencyInjectionFailed
+	case unableToReadPackageDescription
 
 	var description: String {
 		switch self {
 		case .dependencyInjectionFailed:
 			"Failed to add swift-docc-plugin dependency to Package.swift."
+		case .unableToReadPackageDescription:
+			"Failed to read the package description."
 		}
 	}
 }

Sources/TaskCLI/Global Options.swift

@@ -1,4 +1,4 @@
-import Script
+import ArgumentParser
 import Logging
 
 struct GlobalOptions: ParsableArguments {

Sources/TaskCLI/Test Command.swift

@@ -1,8 +1,9 @@
+import ArgumentParser
 import Foundation
-import Script
 import Noora
+import Subprocess
 
-struct TestCommand: Script {
+struct TestCommand: AsyncParsableCommand {
 	static let configuration = CommandConfiguration(
 		commandName: "test",
 		abstract: "Run swift test in a linux container.",
@@ -17,21 +18,26 @@ struct TestCommand: Script {
 		let noora = Noora()
 		let logger = global.makeLogger(labeled: "swift-inotify.cli.task.test")
 		let currentDirectory = FileManager.default.currentDirectoryPath
-		let docker = Executable(path: "/opt/homebrew/bin/docker")
 
 		noora.info("Running tests on Linux.")
 		logger.debug("Current directory", metadata: ["current-directory": "\(currentDirectory)"])
-		do {
-			try await docker(
+		let dockerRunResult = try await Subprocess.run(
+			.name("docker"),
+			arguments: [
 				"run",
 				"-v", "\(currentDirectory):/code",
+				"-v", "swift-inotify-build-cache:/code/.build",
 				"--security-opt", "systempaths=unconfined",
-				"--platform", "linux/arm64",
+				"--platform", Docker.getLinuxPlatformStringWithHostArchitecture(),
 				"-w", "/code", "swift:latest",
 				"/bin/bash", "-c", "swift test --skip InotifyLimitTests; swift test --skip-build --filter InotifyLimitTests"
-			)
+			],
+			output: .standardOutput,
+			error: .standardError
+		)
+		if dockerRunResult.terminationStatus.isSuccess {
 			noora.success("All tests completed successfully.")
-		} catch {
+		} else {
 			noora.error("Not all tests completed successfully.")
 		}
 	}