refactor: Replace shell script with Swift CLI for artifact bundling

Sources/TailwindCSSCLIArtifactBundler/ArtifactBundleBuilder.swift

@@ -0,0 +1,255 @@
+import Crypto
+import Foundation
+
+class ArtifactBundleBuilder {
+  private let version: String
+  private let workDir: String
+  private let outputDir: String
+  private let fileManager = FileManager.default
+
+  private let binaryConfigurations: [BinaryConfiguration] = [
+    BinaryConfiguration(binaryName: "tailwindcss-linux-x64", triple: "x86_64-unknown-linux-gnu"),
+    BinaryConfiguration(binaryName: "tailwindcss-macos-x64", triple: "x86_64-apple-darwin"),
+    BinaryConfiguration(binaryName: "tailwindcss-macos-arm64", triple: "aarch64-apple-darwin"),
+  ]
+
+  init(version: String, workDir: String, outputDir: String) {
+    self.version = version
+    self.workDir = workDir
+    self.outputDir = outputDir
+  }
+
+  func buildArtifactBundles() throws {
+    try setupWorkingDirectory()
+
+    var bundleInfos: [BundleInfo] = []
+
+    print("Creating individual bundles...")
+    for config in binaryConfigurations {
+      let bundleInfo = try createBundle(for: config)
+      bundleInfos.append(bundleInfo)
+    }
+
+    try generateArtifactBundleIndex(bundleInfos: bundleInfos)
+
+    print("=== BUILD COMPLETE ===")
+    print("All bundles created successfully:")
+    print("")
+    print("Generated artifact bundle index: \(outputDir)/tailwindcss.artifactbundleindex")
+    print("")
+
+    let indexChecksum = try computeChecksum(
+      filePath: "\(outputDir)/tailwindcss.artifactbundleindex", usingSHA256Directly: true)
+    print("Index checksum: \(indexChecksum)")
+    print("")
+
+    for bundleInfo in bundleInfos {
+      print("Bundle: \(bundleInfo.fileName)")
+      print("  Checksum: \(bundleInfo.checksum)")
+      print("  Triple: \(bundleInfo.triple)")
+      print("")
+    }
+  }
+
+  private func setupWorkingDirectory() throws {
+    print("Creating working directory: \(workDir)")
+
+    if fileManager.fileExists(atPath: workDir) {
+      try fileManager.removeItem(atPath: workDir)
+    }
+
+    try fileManager.createDirectory(atPath: workDir, withIntermediateDirectories: true)
+  }
+
+  private func createBundle(for config: BinaryConfiguration) throws -> BundleInfo {
+    let bundleDirName = "tailwindcss-\(version)-\(config.triple).artifactbundle"
+    let bundleDir = "\(workDir)/\(bundleDirName)"
+    let binaryPath = "bin/tailwindcss"
+
+    print("Creating bundle for \(config.triple)...")
+
+    // Create bundle directory structure
+    let binDir = "\(bundleDir)/bin"
+    try fileManager.createDirectory(atPath: binDir, withIntermediateDirectories: true)
+
+    // Download binary
+    print("  Downloading \(config.binaryName)...")
+    let binaryURL =
+      "https://github.com/tailwindlabs/tailwindcss/releases/download/\(version)/\(config.binaryName)"
+    let binaryDestination = "\(bundleDir)/\(binaryPath)"
+
+    try downloadFile(from: binaryURL, to: binaryDestination)
+    try makeExecutable(path: binaryDestination)
+    print("  ✓ Downloaded and made executable: \(binaryDestination)")
+
+    // Create info.json
+    print("  Creating info.json...")
+    try createInfoJSON(bundleDir: bundleDir, binaryPath: binaryPath, triple: config.triple)
+    print(
+      "  ✓ Created info.json with version \(version), path \(binaryPath), triple \(config.triple)")
+
+    // Create ZIP file
+    let zipFileName = "\(bundleDirName).zip"
+    let zipPath = "\(outputDir)/\(zipFileName)"
+    print("  Creating ZIP file: \(zipPath)")
+
+    try createZipFile(bundleDir: bundleDir, zipPath: zipPath)
+
+    // Compute checksum
+    print("  Computing checksum...")
+    let checksum = try computeChecksum(filePath: zipPath)
+
+    print("  ✓ Bundle created: \(zipPath)")
+    print("  ✓ Checksum: \(checksum)")
+    print("")
+
+    return BundleInfo(fileName: zipFileName, checksum: checksum, triple: config.triple)
+  }
+
+  private func downloadFile(from urlString: String, to destination: String) throws {
+    guard let url = URL(string: urlString) else {
+      throw ArtifactBundleError.invalidURL(urlString)
+    }
+
+    let data = try Data(contentsOf: url)
+    try data.write(to: URL(fileURLWithPath: destination))
+  }
+
+  private func makeExecutable(path: String) throws {
+    let attributes = [FileAttributeKey.posixPermissions: 0o755]
+    try fileManager.setAttributes(attributes, ofItemAtPath: path)
+  }
+
+  private func createInfoJSON(bundleDir: String, binaryPath: String, triple: String) throws {
+    let artifact = Artifact(
+      version: version,
+      type: "executable",
+      variants: [
+        ArtifactVariant(path: binaryPath, supportedTriples: [triple])
+      ]
+    )
+
+    let info = ArtifactBundleInfo(
+      schemaVersion: "1.0",
+      artifacts: ["tailwindcss": artifact]
+    )
+
+    let encoder = JSONEncoder()
+    encoder.outputFormatting = [.prettyPrinted, .sortedKeys]
+
+    let jsonData = try encoder.encode(info)
+    let infoPath = "\(bundleDir)/info.json"
+    try jsonData.write(to: URL(fileURLWithPath: infoPath))
+  }
+
+  private func createZipFile(bundleDir: String, zipPath: String) throws {
+    // Remove existing ZIP file if it exists
+    if fileManager.fileExists(atPath: zipPath) {
+      try fileManager.removeItem(atPath: zipPath)
+    }
+
+    let bundleDirURL = URL(fileURLWithPath: bundleDir)
+    let workDirURL = bundleDirURL.deletingLastPathComponent()
+    let bundleName = bundleDirURL.lastPathComponent
+
+    let process = Process()
+    process.executableURL = URL(fileURLWithPath: "/usr/bin/zip")
+    process.arguments = ["-r", zipPath, bundleName]
+    process.currentDirectoryURL = workDirURL
+
+    try process.run()
+    process.waitUntilExit()
+
+    guard process.terminationStatus == 0 else {
+      throw ArtifactBundleError.zipCreationFailed
+    }
+  }
+
+  /// Computes the SHA256 checksum of a file.
+  ///
+  /// If `usingSHA256Directly` is true, it uses Swift Crypto's SHA256 implementation.
+  /// This is to workaround https://github.com/swiftlang/swift-package-manager/issues/9219.
+  private func computeChecksum(
+    filePath: String,
+    usingSHA256Directly: Bool = false
+  ) throws -> String {
+    if usingSHA256Directly {
+      // Use swift-crypto's SHA256 implementation
+      let fileURL = URL(fileURLWithPath: filePath)
+      let data = try Data(contentsOf: fileURL)
+      let hash = SHA256.hash(data: data)
+      return hash.compactMap { String(format: "%02x", $0) }.joined()
+    } else {
+      // Use swift package compute-checksum command
+      let process = Process()
+      process.executableURL = URL(fileURLWithPath: "/usr/bin/swift")
+      process.arguments = ["package", "compute-checksum", filePath]
+
+      let pipe = Pipe()
+      process.standardOutput = pipe
+
+      try process.run()
+      process.waitUntilExit()
+
+      guard process.terminationStatus == 0 else {
+        throw ArtifactBundleError.checksumComputationFailed
+      }
+
+      let data = pipe.fileHandleForReading.readDataToEndOfFile()
+      let output = String(data: data, encoding: .utf8)?.trimmingCharacters(
+        in: .whitespacesAndNewlines)
+
+      guard let checksum = output, !checksum.isEmpty else {
+        throw ArtifactBundleError.checksumComputationFailed
+      }
+
+      return checksum
+    }
+  }
+
+  private func generateArtifactBundleIndex(bundleInfos: [BundleInfo]) throws {
+    print("Generating tailwindcss.artifactbundleindex...")
+
+    // Create output directory if it doesn't exist
+    if !fileManager.fileExists(atPath: outputDir) {
+      try fileManager.createDirectory(atPath: outputDir, withIntermediateDirectories: true)
+    }
+
+    let bundles = bundleInfos.map { bundleInfo in
+      Bundle(
+        fileName: bundleInfo.fileName,
+        checksum: bundleInfo.checksum,
+        supportedTriples: [bundleInfo.triple]
+      )
+    }
+
+    let index = ArtifactBundleIndex(
+      schemaVersion: "1.0",
+      bundles: bundles
+    )
+
+    let encoder = JSONEncoder()
+    encoder.outputFormatting = [.prettyPrinted, .sortedKeys]
+
+    let jsonData = try encoder.encode(index)
+    let indexPath = "\(outputDir)/tailwindcss.artifactbundleindex"
+    try jsonData.write(to: URL(fileURLWithPath: indexPath))
+  }
+}
+
+enum ArtifactBundleError: Error, LocalizedError {
+  case invalidURL(String)
+  case zipCreationFailed
+  case checksumComputationFailed
+
+  var errorDescription: String? {
+    switch self {
+    case .invalidURL(let url):
+      return "Invalid URL: \(url)"
+    case .zipCreationFailed:
+      return "Failed to create ZIP file"
+    case .checksumComputationFailed:
+      return "Failed to compute checksum"
+    }
+  }
+}

Sources/TailwindCSSCLIArtifactBundler/Models.swift

@@ -0,0 +1,53 @@
+import Foundation
+
+// MARK: - Artifact Bundle Info Models
+
+/// Represents the info.json file structure for an artifact bundle
+struct ArtifactBundleInfo: Codable {
+  let schemaVersion: String
+  let artifacts: [String: Artifact]
+
+  enum CodingKeys: String, CodingKey {
+    case schemaVersion, artifacts
+  }
+}
+
+struct Artifact: Codable {
+  let version: String
+  let type: String
+  let variants: [ArtifactVariant]
+}
+
+struct ArtifactVariant: Codable {
+  let path: String
+  let supportedTriples: [String]
+}
+
+// MARK: - Artifact Bundle Index Models
+
+/// Represents the .artifactbundleindex file structure
+struct ArtifactBundleIndex: Codable {
+  let schemaVersion: String
+  let bundles: [Bundle]
+}
+
+struct Bundle: Codable {
+  let fileName: String
+  let checksum: String
+  let supportedTriples: [String]
+}
+
+// MARK: - Internal Data Models
+
+/// Configuration for a binary platform
+struct BinaryConfiguration {
+  let binaryName: String
+  let triple: String
+}
+
+/// Information about a created bundle
+struct BundleInfo {
+  let fileName: String
+  let checksum: String
+  let triple: String
+}

Sources/TailwindCSSCLIArtifactBundler/TailwindCSSCLIArtifactBundler.swift

@@ -0,0 +1,32 @@
+import ArgumentParser
+import Foundation
+
+@main
+struct TailwindCSSCLIArtifactBundler: ParsableCommand {
+  static let configuration = CommandConfiguration(
+    commandName: "TailwindCSSCLIArtifactBundler",
+    abstract: "Build TailwindCSS CLI artifact bundles for Swift Package Manager",
+    version: "1.0.0"
+  )
+
+  @Option(name: .shortAndLong, help: "TailwindCSS version to build (e.g., v4.1.14)")
+  var version: String
+
+  @Option(name: .shortAndLong, help: "Working directory for temporary files")
+  var workDir: String = "/tmp/tailwindcss-bundles"
+
+  @Option(name: .shortAndLong, help: "Output directory for the artifact bundle index")
+  var outputDir: String = "."
+
+  func run() throws {
+    print("Building artifact bundles for TailwindCSS version: \(version)")
+
+    let bundler = ArtifactBundleBuilder(
+      version: version,
+      workDir: workDir,
+      outputDir: outputDir
+    )
+
+    try bundler.buildArtifactBundles()
+  }
+}