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.

.github/workflows/docs.yml

@@ -30,7 +30,7 @@ jobs:
     - name: Generate Docs
       run: |
         swift package add-dependency --from 1.4.0 "https://github.com/apple/swift-docc-plugin.git"
-        for target in Inotify TaskCLI; do
+        for target in Inotify InotifyTaskCLI; do
           lower="${target,,}"
           mkdir -p "./public/$lower"
           swift package --allow-writing-to-directory "./public/$lower" \
@@ -44,7 +44,7 @@ jobs:
         cp ./.github/workflows/index.tpl.html public/index.html
         sed -i -e 's/{{project.name}}/Swift Inotify/g' public/index.html
         sed -i -e 's/{{project.tagline}}/🗂️ Monitor filesystem events on Linux using modern Swift concurrency/g' public/index.html
-        sed -i -e 's|{{project.links}}|<li><a href="inotify/documentation/inotify/">Inotify</a>: The actual library.</li><li><a href="taskcli/documentation/taskcli/">TaskCLI</a>: The project build command.</li>|g' public/index.html
+        sed -i -e 's|{{project.links}}|<li><a href="inotify/documentation/inotify/">Inotify</a>: The actual library.</li><li><a href="inotifytaskcli/documentation/inotifytaskcli/">TaskCLI</a>: The project build command.</li>|g' public/index.html
     - name: Upload artifact
       uses: actions/upload-pages-artifact@v4
       with:

Package.resolved

@@ -1,5 +1,5 @@
 {
-  "originHash" : "fd1e824e418c767633bb79b055a4e84d9c86165746bc881d5d27457ad34b0c20",
+  "originHash" : "17ce26ba5c862ca674cd3ceeb43a9fe8a5c5251c5561de65e632a06d79916342",
   "pins" : [
     {
       "identity" : "noora",
@@ -33,17 +33,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/swift-argument-parser",
       "state" : {
-        "revision" : "c5d11a805e765f52ba34ec7284bd4fcd6ba68615",
+        "revision" : "626b5b7b2f45e1b0b1c6f4a309296d1d21d7311b",
-        "version" : "1.7.0"
+        "version" : "1.7.1"
-      }
-    },
-    {
-      "identity" : "swift-async-algorithms",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/apple/swift-async-algorithms",
-      "state" : {
-        "revision" : "9d349bcc328ac3c31ce40e746b5882742a0d1272",
-        "version" : "1.1.3"
       }
     },
     {

Package.swift

@@ -8,15 +8,10 @@ let package = Package(
 		.library(
 			name: "Inotify",
 			targets: ["Inotify"]
-		),
-		.executable(
-			name: "task",
-			targets: ["TaskCLI"]
 		)
 	],
 	dependencies: [
-		.package(url: "https://github.com/apple/swift-argument-parser", from: "1.7.0"),
+		.package(url: "https://github.com/apple/swift-argument-parser", from: "1.7.1"),
-		.package(url: "https://github.com/apple/swift-async-algorithms", from: "1.1.3"),
 		.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"),
@@ -42,15 +37,15 @@ let package = Package(
 			],
 		),
 		.executableTarget(
-			name: "TaskCLI",
+			name: "InotifyTaskCLI",
 			dependencies: [
 				.product(name: "ArgumentParser", package: "swift-argument-parser"),
-				.product(name: "AsyncAlgorithms", package: "swift-async-algorithms"),
 				.product(name: "Logging", package: "swift-log"),
 				.product(name: "_NIOFileSystem", package: "swift-nio"),
 				.product(name: "Subprocess", package: "swift-subprocess"),
 				.product(name: "Noora", package: "Noora")
-			]
+			],
+			path: "Sources/TaskCLI"
 		)
 	]
 )

README.md

@@ -132,11 +132,14 @@ try inotify.removeWatch(wd)
 ## Build Tool
 
 The package ships with a `task` executable (the `TaskCLI` target) that serves as the project's build tool. It automates running tests and generating documentation inside Linux Docker containers, so you can validate everything on the correct platform even when developing on macOS.
+Because of a Swift Package Manager Bug in the [package dependency resolution][swiftpm-bug], the executable needs to be run using the `task.sh` shell script.
+
+[swiftpm-bug]: https://github.com/swiftlang/swift-package-manager/issues/8482
 
 ### Tests
 
 ```bash
-swift run task test
+./task.sh test
 ```
 
 Use `-v`, `-vv`, or `-vvv` to increase log verbosity. The command runs two passes: first all tests except `InotifyLimitTests`, then only `InotifyLimitTests` (which manipulate system-level inotify limits and need to run in isolation).
@@ -148,7 +151,7 @@ Docker must be installed and running on your machine.
 Full API documentation is available as DocC catalogs bundled with the package. Generate them locally with:
 
 ```bash
-swift run task generate-docs
+./task.sh generate-docs
 ```
 
 Then open the files in the newly created `public` folder.

Sources/TaskCLI/DoccFinder.swift

@@ -3,27 +3,15 @@ import _NIOFileSystem
 public struct DoccFinder {
 	static let fileManager = FileSystem.shared
 
-	public static func getTargetsWithDocumentation(at paths: String...) async throws -> [String] {
+	public static func hasDoccFolder(at path: String) async throws -> Bool {
-		try await Self.getTargetsWithDocumentation(at: paths)
+		let itemPath = FilePath(path)
-	}
+		var hasDoccFolder = false
 
-	static func getTargetsWithDocumentation(at paths: [String]) async throws -> [String] {
+		try await withSubdirectories(at: itemPath) { subdirectory in
-		var resolved: [String] = []
+			guard subdirectory.description.hasSuffix(".docc") else { return }
-
+			hasDoccFolder = true
-		for path in paths {
-			let itemPath = FilePath(path)
-
-			try await withSubdirectories(at: itemPath) { targetPath in
-				print("Target path is", targetPath.description)
-				try await withSubdirectories(at: targetPath) { subdirectory in
-					guard subdirectory.description.hasSuffix(".docc") else { return }
-					guard let target = targetPath.lastComponent?.description else { return }
-					resolved.append(target)
-				}
-			}
 		}
-
+		return hasDoccFolder
-		return resolved
 	}
 
 	private static func withSubdirectories(at path: FilePath, body: (FilePath) async throws -> Void) async throws {

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

@@ -1,5 +1,4 @@
 import ArgumentParser
-import AsyncAlgorithms
 import Foundation
 import Logging
 import Noora
@@ -43,28 +42,21 @@ struct GenerateDocumentationCommand: AsyncParsableCommand {
 		let script = Self.makeRunScript(for: targets)
 
 		logger.debug("Container script", metadata: ["script": "\(script)"])
-		let dockerResult = try await Subprocess.run(
+		let dockerRunResult = try await Subprocess.run(
 			.name("docker"),
 			arguments: [
 				"run", "--rm",
-				"-v", "\(tempDirectory.path(percentEncoded: false)):/code",
+				"-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,
+				"/bin/bash", "-c", script
 			],
-			preferredBufferSize: 10,
+			output: .standardOutput,
-		) { execution, standardInput, standardOutput, standardError in
+			error: .standardError
-			print("")
+		)
-			let stdout = standardOutput.lines()
+		if !dockerRunResult.terminationStatus.isSuccess {
-			let stderr = standardError.lines()
-			for try await line in merge(stdout, stderr) {
-				noora.passthrough("\(line)")
-			}
-			print("")
-		}
-
-		guard dockerResult.terminationStatus.isSuccess else {
 			noora.error("Documentation generation failed.")
 			return
 		}
@@ -90,7 +82,7 @@ struct GenerateDocumentationCommand: AsyncParsableCommand {
 			("{{project.tagline}}", "🗂️ Monitor filesystem events on Linux using modern Swift concurrency"),
 			("{{project.links}}", """
 				<li><a href="inotify/documentation/inotify/">Inotify</a>: The actual library.</li>\
-				<li><a href="taskcli/documentation/taskcli/">TaskCLI</a>: The project build command.</li>
+				<li><a href="inotifytaskcli/documentation/inotifytaskcli/">TaskCLI</a>: The project build command.</li>
 				"""),
 		]
 
@@ -106,9 +98,37 @@ struct GenerateDocumentationCommand: AsyncParsableCommand {
 	}
 
 	private static func targets(for projectDirectory: URL) async throws -> [String] {
-		let sourcesDirectory = projectDirectory.appending(path: "Sources").path
+		let packages = try await Self.packageTargets()
-		let testsDirectory = projectDirectory.appending(path: "Tests").path
+		var packagesWithDoccFolder: [(name: String, path: String)] = []
-		return try await DoccFinder.getTargetsWithDocumentation(at: sourcesDirectory, testsDirectory)
+		for package in packages {
+			guard try await DoccFinder.hasDoccFolder(at: package.path) else { continue }
+			packagesWithDoccFolder.append(package)
+		}
+		return packagesWithDoccFolder.map { $0.name }
+	}
+
+	private static func packageTargets() async throws -> [(name: String, path: String)] {
+		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]
+		}
+		struct Target: Codable {
+			let name: String
+			let path: String
+		}
+
+		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) }
 	}
 
 	private static func makeRunScript(for targets: [String]) -> String {
@@ -152,15 +172,16 @@ struct GenerateDocumentationCommand: AsyncParsableCommand {
 	// MARK: - Dependency Injection
 
 	private func injectDoccPluginDependency(in directory: URL, logger: Logger) async throws {
-		let result = try await Subprocess.run(
+		let swiftRunResult = try await Subprocess.run(
 			.name("swift"),
 			arguments: [
 				"package", "--package-path", directory.path(percentEncoded: false),
 				"add-dependency", "--from", Self.doccPluginMinVersion, Self.doccPluginURL
 			],
-		) { _ in }
+			output: .standardOutput,
-
+			error: .standardError
-		guard result.terminationStatus.isSuccess else {
+		)
+		if !swiftRunResult.terminationStatus.isSuccess {
 			throw GenerateDocumentationError.dependencyInjectionFailed
 		}
 
@@ -170,11 +191,14 @@ struct GenerateDocumentationCommand: AsyncParsableCommand {
 
 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/TaskCLI.docc/TaskCLI.md

@@ -1,4 +1,4 @@
-# ``TaskCLI``
+# ``InotifyTaskCLI``
 
 The build tool for the Swift Inotify project.
 
@@ -6,10 +6,14 @@ The build tool for the Swift Inotify project.
 
 `TaskCLI` is a small command-line executable (exposed as `task` in `Package.swift`) that automates project-level workflows. Its primary purpose is running integration tests and generating documentation inside Linux Docker containers, so you can validate inotify-dependent code on the correct platform even when developing on macOS.
 
+Because of a Swift Package Manager Bug in the [package dependency resolution][swiftpm-bug], the executable needs to be run using the `task.sh` shell script.
+
+[swiftpm-bug]: https://github.com/swiftlang/swift-package-manager/issues/8482
+
 ### Running the Tests
 
 ```bash
-swift run task test
+./task.sh test
 ```
 
 This launches a `swift:latest` Docker container with the repository mounted at `/code`, then executes two test passes:
@@ -22,7 +26,7 @@ The container is started with `--security-opt systempaths=unconfined` so that th
 ### Generating Documentation
 
 ```bash
-swift run task generate-documentation
+./task.sh generate-documentation
 ```
 
 This copies the project to a temporary directory, injects the `swift-docc-plugin` dependency via `swift package add-dependency` (if absent), and runs documentation generation inside a `swift:latest` Docker container. The resulting static sites are written to `./public/inotify/` and `./public/taskcli/`, ready for deployment to GitHub Pages.

Sources/TaskCLI/Test Command.swift

@@ -1,8 +1,7 @@
 import ArgumentParser
-import AsyncAlgorithms
 import Foundation
-import Subprocess
 import Noora
+import Subprocess
 
 struct TestCommand: AsyncParsableCommand {
 	static let configuration = CommandConfiguration(
@@ -22,21 +21,21 @@ struct TestCommand: AsyncParsableCommand {
 
 		noora.info("Running tests on Linux.")
 		logger.debug("Current directory", metadata: ["current-directory": "\(currentDirectory)"])
-		async let monitorResult = Subprocess.run(
+		let dockerRunResult = try await Subprocess.run(
 			.name("docker"),
-			arguments: ["run", "-v", "\(currentDirectory):/code", "--security-opt", "systempaths=unconfined", "--platform", "linux/arm64", "-w", "/code", "swift:latest", "/bin/bash", "-c", "swift test --skip InotifyLimitTests; swift test --skip-build --filter InotifyLimitTests"],
+			arguments: [
-			preferredBufferSize: 10,
+				"run",
-		) { execution, standardInput, standardOutput, standardError in
+				"-v", "\(currentDirectory):/code",
-			print("")
+				"-v", "swift-inotify-build-cache:/code/.build",
-			let stdout = standardOutput.lines()
+				"--security-opt", "systempaths=unconfined",
-			let stderr = standardError.lines()
+				"--platform", Docker.getLinuxPlatformStringWithHostArchitecture(),
-			for try await line in merge(stdout, stderr) {
+				"-w", "/code", "swift:latest",
-				noora.passthrough("\(line)")
+				"/bin/bash", "-c", "swift test --skip InotifyLimitTests; swift test --skip-build --filter InotifyLimitTests"
-			}
+			],
-			print("")
+			output: .standardOutput,
-		}
+			error: .standardError
-
+		)
-		if (try await monitorResult.terminationStatus.isSuccess) {
+		if dockerRunResult.terminationStatus.isSuccess {
 			noora.success("All tests completed successfully.")
 		} else {
 			noora.error("Not all tests completed successfully.")

task.sh

@@ -0,0 +1,58 @@
+#!/usr/bin/env zsh
+
+# task - Run the package's TaskCLI target via a transient "task" product.
+#
+# Works around https://github.com/swiftlang/swift-package-manager/issues/8482
+# by temporarily adding an executable product named "task" to Package.swift,
+# running it with `swift run`, and restoring the original manifest afterwards.
+#
+# Usage:  task [arguments...]
+#
+# The script auto-detects the package name from Package.swift and expects an
+# executable target named "<PackageName>TaskCLI" to exist.
+
+set -euo pipefail
+
+# --- Resolve the package root (search upward for Package.swift) -----------
+
+package_root="${PWD}"
+while [[ ! -f "${package_root}/Package.swift" ]]; do
+	package_root="${package_root:h}"            # zsh dirname
+	if [[ "${package_root}" == "/" ]]; then
+		echo "error: Could not find Package.swift in any parent directory." >&2
+		exit 1
+	fi
+done
+
+manifest="${package_root}/Package.swift"
+backup="${manifest}.task-backup"
+
+# --- Extract the package name ---------------------------------------------
+
+package_name=$(sed -n 's/^.*name:[[:space:]]*"\([^"]*\)".*/\1/p' "${manifest}" | head -1)
+if [[ -z "${package_name}" ]]; then
+	echo "error: Could not determine package name from ${manifest}." >&2
+	exit 1
+fi
+
+target_name="${package_name}TaskCLI"
+
+# --- Cleanup trap (runs on EXIT — covers success, failure, signals) -------
+
+function cleanup {
+	if [[ -f "${backup}" ]]; then
+		mv -f "${backup}" "${manifest}"
+	fi
+}
+trap cleanup EXIT
+
+# --- Inject the transient "task" product ----------------------------------
+
+cp -f "${manifest}" "${backup}"
+
+swift package --package-path "${package_root}" \
+	add-product task --type executable --targets "${target_name}"
+
+# --- Run it (forward all script arguments) --------------------------------
+
+swift run --package-path "${package_root}" task "$@"