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