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88 lines
3.4 KiB
Swift
88 lines
3.4 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import Foundation
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import LanguageServerProtocol
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/// Build settings for a single file.
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///
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/// Encapsulates all the settings needed to compile a single file, including the compiler arguments
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/// and working directory. FileBuildSettings are typically the result of a BuildSystem query.
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public struct FileBuildSettings: Equatable, Sendable {
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/// The compiler arguments to use for this file.
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public var compilerArguments: [String]
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/// The working directory to resolve any relative paths in `compilerArguments`.
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public var workingDirectory: String? = nil
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/// Whether the build settings were computed from a real build system or whether they are synthesized fallback arguments while the build system is still busy computing build settings.
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public var isFallback: Bool
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public init(compilerArguments: [String], workingDirectory: String? = nil, isFallback: Bool = false) {
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self.compilerArguments = compilerArguments
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self.workingDirectory = workingDirectory
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self.isFallback = isFallback
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}
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}
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fileprivate let cExtensions = ["c"]
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fileprivate let cppExtensions = ["cpp", "cc"]
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fileprivate let objcExtensions = ["m"]
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fileprivate let objcppExtensions = ["mm"]
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private extension String {
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var pathExtension: String {
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return (self as NSString).pathExtension
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}
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var pathBasename: String {
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return (self as NSString).lastPathComponent
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}
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}
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public extension FileBuildSettings {
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/// Return arguments suitable for use by `newFile`.
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///
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/// This patches the arguments by searching for the argument corresponding to
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/// `originalFile` and replacing it.
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func patching(newFile: String, originalFile: String) -> FileBuildSettings {
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var arguments = self.compilerArguments
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let basename = originalFile.pathBasename
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let fileExtension = originalFile.pathExtension
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if let index = arguments.lastIndex(where: {
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// It's possible the arguments use relative paths while the `originalFile` given
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// is an absolute/real path value. We guess based on suffixes instead of hitting
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// the file system.
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$0.hasSuffix(basename) && originalFile.hasSuffix($0)
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}) {
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arguments[index] = newFile
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// The `-x<lang>` flag needs to be before the possible `-c <header file>`
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// argument in order for Clang to respect it. If there is a pre-existing `-x`
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// flag though, Clang will honor that one instead since it comes after.
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if cExtensions.contains(fileExtension) {
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arguments.insert("-xc", at: 0)
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} else if cppExtensions.contains(fileExtension) {
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arguments.insert("-xc++", at: 0)
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} else if objcExtensions.contains(fileExtension) {
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arguments.insert("-xobjective-c", at: 0)
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} else if (objcppExtensions.contains(fileExtension)) {
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arguments.insert("-xobjective-c++", at: 0)
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}
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}
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return FileBuildSettings(
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compilerArguments: arguments,
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workingDirectory: self.workingDirectory,
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isFallback: self.isFallback
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)
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}
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}
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