Package.swift

// swift-tools-version:5.7

import Foundation
import PackageDescription

// MARK: - Parse build arguments

func hasEnvironmentVariable(_ name: String) -> Bool {
  return ProcessInfo.processInfo.environment[name] != nil
}

/// Set when building swift-syntax using swift-syntax-dev-utils or in Swift CI in general.
///
/// Modifies the build in the following ways
///  - Enables assertions even in release builds
///  - Removes the dependency of swift-syntax on os_log
let buildScriptEnvironment = hasEnvironmentVariable("SWIFT_BUILD_SCRIPT_ENVIRONMENT")

/// Check that the layout of the syntax tree is correct.
///
/// See CONTRIBUTING.md for more information
let rawSyntaxValidation = hasEnvironmentVariable("SWIFTSYNTAX_ENABLE_RAWSYNTAX_VALIDATION")

/// Mutate the input of `assertParse` test cases.
///
/// See CONTRIBUTING.md for more information
let alternateTokenIntrospection = hasEnvironmentVariable("SWIFTPARSER_ENABLE_ALTERNATE_TOKEN_INTROSPECTION")

/// Assume that swift-argument-parser is checked out next to swift-syntax and use that instead of fetching a remote dependency.
let useLocalDependencies = hasEnvironmentVariable("SWIFTCI_USE_LOCAL_DEPS")

// MARK: - Compute custom build settings

// These build settings apply to the target and the corresponding test target.
var swiftSyntaxSwiftSettings: [SwiftSetting] = []
var swiftSyntaxBuilderSwiftSettings: [SwiftSetting] = []
var swiftParserSwiftSettings: [SwiftSetting] = []

if buildScriptEnvironment {
  swiftSyntaxSwiftSettings += [
    .define("SWIFTSYNTAX_ENABLE_ASSERTIONS")
  ]
  swiftSyntaxBuilderSwiftSettings += [
    .define("SWIFTSYNTAX_NO_OSLOG_DEPENDENCY")
  ]
}

if rawSyntaxValidation {
  swiftSyntaxSwiftSettings += [
    .define("SWIFTSYNTAX_ENABLE_RAWSYNTAX_VALIDATION")
  ]
}

if alternateTokenIntrospection {
  swiftParserSwiftSettings += [
    .define("SWIFTPARSER_ENABLE_ALTERNATE_TOKEN_INTROSPECTION")
  ]
}

// MARK: - Build the package

let package = Package(
  name: "swift-syntax",
  platforms: [
    .macOS(.v10_15),
    .iOS(.v13),
    .tvOS(.v13),
    .watchOS(.v6),
    .macCatalyst(.v13),
  ],
  products: [
    .library(name: "SwiftBasicFormat", targets: ["SwiftBasicFormat"]),
    .library(name: "SwiftCompilerPlugin", targets: ["SwiftCompilerPlugin"]),
    .library(name: "SwiftCompilerPluginMessageHandling", targets: ["SwiftCompilerPluginMessageHandling"]),
    .library(name: "SwiftDiagnostics", targets: ["SwiftDiagnostics"]),
    .library(name: "SwiftIDEUtils", targets: ["SwiftIDEUtils"]),
    .library(name: "SwiftOperators", targets: ["SwiftOperators"]),
    .library(name: "SwiftParser", targets: ["SwiftParser"]),
    .library(name: "SwiftParserDiagnostics", targets: ["SwiftParserDiagnostics"]),
    .library(name: "SwiftRefactor", targets: ["SwiftRefactor"]),
    .library(name: "SwiftSyntax", targets: ["SwiftSyntax"]),
    .library(name: "SwiftSyntaxBuilder", targets: ["SwiftSyntaxBuilder"]),
    .library(name: "SwiftSyntaxMacros", targets: ["SwiftSyntaxMacros"]),
    .library(name: "SwiftSyntaxMacroExpansion", targets: ["SwiftSyntaxMacroExpansion"]),
    .library(name: "SwiftSyntaxMacrosTestSupport", targets: ["SwiftSyntaxMacrosTestSupport"]),
  ],
  targets: [
    // MARK: - Internal helper targets

    .target(
      name: "_InstructionCounter"
    ),

    .target(
      name: "_SwiftSyntaxTestSupport",
      dependencies: ["SwiftBasicFormat", "SwiftSyntax", "SwiftSyntaxBuilder"]
    ),

    .testTarget(
      name: "SwiftSyntaxTestSupportTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftParser"]
    ),

    // MARK: - Library targets
    // Formatting style:
    //  - One section for each target and its test target
    //  - Sections are sorted alphabetically
    //  - Each target argument takes exactly one line, unless there are external dependencies.
    //    In that case package and internal dependencies are on different lines.
    //  - All array elements are sorted alphabetically

    // MARK: SwiftBasicFormat

    .target(
      name: "SwiftBasicFormat",
      dependencies: ["SwiftSyntax"],
      exclude: ["CMakeLists.txt"]
    ),

    .testTarget(
      name: "SwiftBasicFormatTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftBasicFormat", "SwiftSyntaxBuilder"]
    ),

    // MARK: SwiftCompilerPlugin

    .target(
      name: "SwiftCompilerPlugin",
      dependencies: ["SwiftCompilerPluginMessageHandling", "SwiftSyntaxMacros"]
    ),

    .testTarget(
      name: "SwiftCompilerPluginTest",
      dependencies: ["SwiftCompilerPlugin"]
    ),

    // MARK: SwiftCompilerPluginMessageHandling

    .target(
      name: "SwiftCompilerPluginMessageHandling",
      dependencies: ["SwiftDiagnostics", "SwiftOperators", "SwiftParser", "SwiftSyntax", "SwiftSyntaxMacros", "SwiftSyntaxMacroExpansion"],
      exclude: ["CMakeLists.txt"]
    ),

    // MARK: SwiftDiagnostics

    .target(
      name: "SwiftDiagnostics",
      dependencies: ["SwiftSyntax"],
      exclude: ["CMakeLists.txt"]
    ),

    .testTarget(
      name: "SwiftDiagnosticsTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftDiagnostics", "SwiftParser", "SwiftParserDiagnostics"]
    ),

    // MARK: SwiftIDEUtils

    .target(
      name: "SwiftIDEUtils",
      dependencies: ["SwiftSyntax"],
      exclude: ["CMakeLists.txt"]
    ),

    .testTarget(
      name: "SwiftIDEUtilsTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftIDEUtils", "SwiftParser", "SwiftSyntax"]
    ),

    // MARK: SwiftSyntax

    .target(
      name: "SwiftSyntax",
      dependencies: ["SwiftSyntax509"],
      exclude: ["CMakeLists.txt"],
      swiftSettings: swiftSyntaxSwiftSettings
    ),

    .testTarget(
      name: "SwiftSyntaxTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftSyntax", "SwiftSyntaxBuilder"],
      swiftSettings: swiftSyntaxSwiftSettings
    ),

    // MARK: Version marker modules

    .target(
      name: "SwiftSyntax509",
      dependencies: []
    ),

    // MARK: SwiftSyntaxBuilder

    .target(
      name: "SwiftSyntaxBuilder",
      dependencies: ["SwiftBasicFormat", "SwiftParser", "SwiftDiagnostics", "SwiftParserDiagnostics", "SwiftSyntax"],
      exclude: ["CMakeLists.txt"],
      swiftSettings: swiftSyntaxBuilderSwiftSettings
    ),

    .testTarget(
      name: "SwiftSyntaxBuilderTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftSyntaxBuilder"],
      swiftSettings: swiftSyntaxBuilderSwiftSettings
    ),

    // MARK: SwiftSyntaxMacros

    .target(
      name: "SwiftSyntaxMacros",
      dependencies: ["SwiftDiagnostics", "SwiftParser", "SwiftSyntax", "SwiftSyntaxBuilder"],
      exclude: ["CMakeLists.txt"]
    ),

    // MARK: SwiftSyntaxMacroExpansion

    .target(
      name: "SwiftSyntaxMacroExpansion",
      dependencies: ["SwiftSyntax", "SwiftSyntaxBuilder", "SwiftSyntaxMacros", "SwiftDiagnostics"],
      exclude: ["CMakeLists.txt"]
    ),

    .testTarget(
      name: "SwiftSyntaxMacroExpansionTest",
      dependencies: [
        "SwiftSyntax", "_SwiftSyntaxTestSupport", "SwiftDiagnostics", "SwiftOperators", "SwiftParser", "SwiftSyntaxBuilder", "SwiftSyntaxMacros",
        "SwiftSyntaxMacroExpansion", "SwiftSyntaxMacrosTestSupport",
      ]
    ),

    // MARK: SwiftSyntaxMacrosTestSupport

    .target(
      name: "SwiftSyntaxMacrosTestSupport",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftDiagnostics", "SwiftParser", "SwiftSyntaxMacros", "SwiftSyntaxMacroExpansion"]
    ),

    // MARK: SwiftParser

    .target(
      name: "SwiftParser",
      dependencies: ["SwiftSyntax"],
      exclude: ["CMakeLists.txt", "README.md"],
      swiftSettings: swiftParserSwiftSettings

    ),

    .testTarget(
      name: "SwiftParserTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftDiagnostics", "SwiftOperators", "SwiftParser", "SwiftSyntaxBuilder"],
      swiftSettings: swiftParserSwiftSettings
    ),

    // MARK: SwiftParserDiagnostics

    .target(
      name: "SwiftParserDiagnostics",
      dependencies: ["SwiftBasicFormat", "SwiftDiagnostics", "SwiftParser", "SwiftSyntax"],
      exclude: ["CMakeLists.txt"]
    ),

    .testTarget(
      name: "SwiftParserDiagnosticsTest",
      dependencies: ["SwiftDiagnostics", "SwiftParserDiagnostics"]
    ),

    // MARK: SwiftOperators

    .target(
      name: "SwiftOperators",
      dependencies: ["SwiftDiagnostics", "SwiftParser", "SwiftSyntax"],
      exclude: [
        "CMakeLists.txt"
      ]
    ),

    .testTarget(
      name: "SwiftOperatorsTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftOperators", "SwiftParser"]
    ),

    // MARK: SwiftRefactor

    .target(
      name: "SwiftRefactor",
      dependencies: ["SwiftBasicFormat", "SwiftParser", "SwiftSyntax", "SwiftSyntaxBuilder"]
    ),

    .testTarget(
      name: "SwiftRefactorTest",
      dependencies: ["_SwiftSyntaxTestSupport", "SwiftRefactor"]
    ),

    // MARK: - Executable targets

    .executableTarget(
      name: "swift-parser-cli",
      dependencies: [
        "_InstructionCounter", "SwiftBasicFormat", "SwiftDiagnostics", "SwiftOperators", "SwiftParser", "SwiftParserDiagnostics", "SwiftSyntax",
        .product(name: "ArgumentParser", package: "swift-argument-parser"),
      ]
    ),

    // MARK: - Deprecated targets

    // MARK: PerformanceTest
    // TODO: Should be included in SwiftParserTest/SwiftSyntaxTest

    .testTarget(
      name: "PerformanceTest",
      dependencies: ["_InstructionCounter", "_SwiftSyntaxTestSupport", "SwiftIDEUtils", "SwiftParser", "SwiftSyntax"],
      exclude: ["Inputs"]
    ),
  ]
)

// This is a fake target that depends on all targets in the package.
// We need to define it manually because the `SwiftSyntax-Package` target doesn't exist for `swift build`.

package.targets.append(
  .target(
    name: "SwiftSyntax-all",
    dependencies: package.targets.compactMap {
      if $0.type == .test {
        return nil
      } else {
        return .byName(name: $0.name)
      }
    }
  )
)

if useLocalDependencies {
  package.dependencies += [
    .package(path: "../swift-argument-parser")
  ]
} else {
  // Building standalone.
  package.dependencies += [
    .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.2.2")
  ]
}