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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2023 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
//
//===----------------------------------------------------------------------===//
#if !canImport(Darwin) && !os(Windows)
private func _xdgHomeURL() -> URL {
if let homeEnvValue = ProcessInfo.processInfo.environment["HOME"], !homeEnvValue.isEmpty {
return URL(filePath: homeEnvValue, directoryHint: .isDirectory)
} else {
return __xdgHomeURL
}
}
private let __xdgHomeURL: URL = {
if let data = try? Data(contentsOf: URL(filePath: "/etc/default/useradd", directoryHint: .notDirectory)) {
let contents = String(decoding: data, as: UTF8.self)
for line in contents.split(separator: "\n") {
if line.starts(with: "HOME="), let equalsIndex = line.firstIndex(of: "=") {
let path = String(line[line.index(after: equalsIndex)...])
return URL(filePath: path, directoryHint: .isDirectory)
}
}
}
return URL(filePath: "/home", directoryHint: .isDirectory)
}()
/// A single base directory relative to which user-specific data files should be written. This directory is defined by the environment variable $XDG_DATA_HOME.
private func _xdgDataHomeURL() -> URL {
// $XDG_DATA_HOME defines the base directory relative to which user specific data files should be stored. If $XDG_DATA_HOME is either not set or empty, a default equal to $HOME/.local/share should be used.
if let envValue = ProcessInfo.processInfo.environment["XDG_DATA_HOME"], envValue.unicodeScalars.first == "/" {
return URL(filePath: envValue, directoryHint: .isDirectory)
}
return _xdgHomeURL().appending(path: ".local/share", directoryHint: .isDirectory)
}
/// A single base directory relative to which user-specific non-essential (cached) data should be written. This directory is defined by the environment variable $XDG_CACHE_HOME.
private func _xdgCacheURL() -> URL {
// $XDG_CACHE_HOME defines the base directory relative to which user specific non-essential data files should be stored. If $XDG_CACHE_HOME is either not set or empty, a default equal to $HOME/.cache should be used.
if let envValue = ProcessInfo.processInfo.environment["XDG_CACHE_HOME"], envValue.unicodeScalars.first == "/" {
return URL(filePath: envValue, directoryHint: .isDirectory)
}
return _xdgHomeURL().appending(component: ".cache", directoryHint: .isDirectory)
}
/// A single base directory relative to which user-specific configuration files should be written. This directory is defined by the environment variable $XDG_CONFIG_HOME.
private func _xdgConfigHomeURL() -> URL {
// $XDG_CONFIG_HOME defines the base directory relative to which user specific configuration files should be stored. If $XDG_CONFIG_HOME is either not set or empty, a default equal to $HOME/.config should be used.
if let envValue = ProcessInfo.processInfo.environment["XDG_CONFIG_HOME"], envValue.unicodeScalars.first == "/" {
return URL(filePath: envValue, directoryHint: .isDirectory)
}
return _xdgHomeURL().appending(component: ".config", directoryHint: .isDirectory)
}
/// A set of preference ordered base directories relative to which configuration files should be searched. This set of directories is defined by the environment variable $XDG_CONFIG_DIRS.
private func _xdgConfigURLs() -> [URL] {
// $XDG_CONFIG_DIRS defines the preference-ordered set of base directories to search for configuration files in addition to the $XDG_CONFIG_HOME base directory. The directories in $XDG_CONFIG_DIRS should be separated with a colon ':'.
// If $XDG_CONFIG_DIRS is either not set or empty, a value equal to /etc/xdg should be used.
if let envValue = ProcessInfo.processInfo.environment["XDG_CONFIG_DIRS"], !envValue.isEmpty {
let directories = envValue.split(separator: ":")
if !directories.isEmpty {
return directories.map { URL(filePath: String($0), directoryHint: .isDirectory) }
}
}
return [URL(filePath: "/etc/xdg", directoryHint: .isDirectory)]
}
private enum _XDGUserDirectory: String {
case desktop = "DESKTOP"
case download = "DOWNLOAD"
case publicShare = "PUBLICSHARE"
case documents = "DOCUMENTS"
case music = "MUSIC"
case pictures = "PICTURES"
case videos = "VIDEOS"
var url: URL {
return url(userConfiguration: _XDGUserDirectory.configuredDirectoryURLs, osDefaultConfiguration: _XDGUserDirectory.osDefaultDirectoryURLs)
}
func url(userConfiguration: [_XDGUserDirectory: URL], osDefaultConfiguration: [_XDGUserDirectory: URL]) -> URL {
if let url = userConfiguration[self] {
return url
} else if let url = osDefaultConfiguration[self] {
return url
} else {
return self.defaultValue
}
}
var defaultValue: URL {
let component = switch self {
case .desktop: "Desktop"
case .download: "Downloads"
case .publicShare: "Public"
case .documents: "Documents"
case .music: "Music"
case .pictures: "Pictures"
case .videos: "Videos"
}
return FileManager.default.homeDirectoryForCurrentUser.appending(component: component)
}
private static func parseConfigFile(_ url: URL) -> [_XDGUserDirectory: URL]? {
guard let data = try? Data(contentsOf: url) else { return nil }
let configuration = String(decoding: data, as: UTF8.self)
var entries: [_XDGUserDirectory: URL] = [:]
let home = FileManager.default.homeDirectoryForCurrentUser
for line in configuration.split(separator: "\n") {
if let equalsIdx = line.firstIndex(of: "=") {
var variable = String(line[..<equalsIdx])._trimmingWhitespace()
let prefix = "XDG_"
let suffix = "_DIR"
if variable.hasPrefix(prefix) && variable.hasSuffix(suffix) {
let endOfPrefix = variable.unicodeScalars.index(variable.startIndex, offsetBy: prefix.unicodeScalars.count)
let startOfSuffix = variable.unicodeScalars.index(variable.endIndex, offsetBy: -suffix.unicodeScalars.count)
variable = String(variable[endOfPrefix ..< startOfSuffix])
}
guard let directory = _XDGUserDirectory(rawValue: variable) else {
continue
}
let path = String(line[line.unicodeScalars.index(after: equalsIdx)...])._trimmingWhitespace()
if !path.isEmpty {
entries[directory] = URL(filePath: path, directoryHint: .isDirectory, relativeTo: home)
}
} else {
return nil // Incorrect syntax.
}
}
return entries
}
private static let configuredDirectoryURLs: [_XDGUserDirectory: URL] = {
parseConfigFile(_xdgConfigHomeURL().appending(component: "user-dirs.dirs")) ?? [:]
}()
private static let osDefaultDirectoryURLs: [_XDGUserDirectory: URL] = {
for directory in _xdgConfigURLs() {
let configurationFile = directory.appending(component: "user-dirs.defaults")
if let result = parseConfigFile(configurationFile) {
return result
}
}
return [:]
}()
}
func _XDGSearchPathURL(for directory: FileManager.SearchPathDirectory, in domain: FileManager.SearchPathDomainMask) -> URL? {
return switch (directory, domain) {
case (.autosavedInformationDirectory, .userDomainMask):
_xdgDataHomeURL().appending(component: "Autosave Information", directoryHint: .isDirectory)
case (.desktopDirectory, .userDomainMask):
_XDGUserDirectory.desktop.url
case (.documentDirectory, .userDomainMask):
_XDGUserDirectory.documents.url
case (.cachesDirectory, .userDomainMask):
_xdgCacheURL()
case (.applicationSupportDirectory, .userDomainMask):
_xdgDataHomeURL()
case (.downloadsDirectory, .userDomainMask):
_XDGUserDirectory.download.url
case (.userDirectory, .localDomainMask):
_xdgHomeURL()
case (.moviesDirectory, .userDomainMask):
_XDGUserDirectory.videos.url
case (.musicDirectory, .userDomainMask):
_XDGUserDirectory.music.url
case (.picturesDirectory, .userDomainMask):
_XDGUserDirectory.pictures.url
case (.sharedPublicDirectory, .userDomainMask):
_XDGUserDirectory.publicShare.url
case (.trashDirectory, .localDomainMask), (.trashDirectory, .userDomainMask):
FileManager.default.homeDirectoryForCurrentUser.appending(component: ".Trash", directoryHint: .isDirectory)
default: nil
}
}
#endif
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