File: PluginTargetBuildDescription.swift

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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

private import Basics

import struct Foundation.URL

import struct PackageGraph.ResolvedModule

private import class PackageLoading.ManifestLoader
internal import struct PackageModel.ToolsVersion
internal import class PackageModel.UserToolchain
import enum PackageGraph.BuildTriple

struct PluginTargetBuildDescription: BuildTarget {
    private let target: ResolvedModule
    private let toolsVersion: ToolsVersion
    let isPartOfRootPackage: Bool

    init(target: ResolvedModule, toolsVersion: ToolsVersion, isPartOfRootPackage: Bool) {
        assert(target.type == .plugin)
        self.target = target
        self.toolsVersion = toolsVersion
        self.isPartOfRootPackage = isPartOfRootPackage
    }

    var sources: [URL] {
        return target.sources.paths.map { URL(fileURLWithPath: $0.pathString) }
    }

    var name: String {
        return target.name
    }

    var buildTriple: BuildTriple {
        return target.buildTriple
    }

    func compileArguments(for fileURL: URL) throws -> [String] {
        // FIXME: This is very odd and we should clean this up by merging `ManifestLoader` and `DefaultPluginScriptRunner` again.
        let environment = Environment.current
        let loader = ManifestLoader(
            toolchain: try UserToolchain(
                swiftSDK: .hostSwiftSDK(
                    environment: environment
                ),
                environment: environment
            )
        )
        var args = loader.interpreterFlags(for: self.toolsVersion)
        // Note: we ignore the `fileURL` here as the expectation is that we get a commandline for the entire target in case of Swift. Plugins are always assumed to only consist of Swift files.
        args += sources.map { $0.path }
        return args
    }
}