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PackageInstaller.swift
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//
// PackageInstaller.swift
// XcodeHelper
//
// Created by dhcdht on 2016/10/27.
// Copyright © 2016年 XH. All rights reserved.
//
import Cocoa
/// Xcode 扩展的安装器
class PackageInstaller: NSObject {
typealias InstallOrUpdateProgressBlock = (_ progressMessage: String, _ progress: Float) -> Void
typealias InstallOrUpdateCompletionBlock = (_ error: Error?) -> Void
typealias DownloadOrUpdateCompletionBlock = (_ output: String?, _ error: Error?) -> Void
class var sharedInstance: PackageInstaller {
get {
struct Single {
static let instance = PackageInstaller()
}
return Single.instance
}
}
// MARK: - Public
func installPackage(package: Package, progress: @escaping InstallOrUpdateProgressBlock, completion: @escaping InstallOrUpdateCompletionBlock) -> Void {
progress("Downloading \(package.name)...", 0.33)
self.downloadOrUpdatePackage(package: package) { (output, error) in
if let error = error {
completion(error)
return
}
progress("Installing \(package.name)...", 0.66)
self.installPackage(package: package, completion: { (error) in
if let error = error {
completion(error)
return
}
self.reloadXcodeForPackage(package: package, completion: completion)
})
}
}
func updatePackage(package: Package, progress: @escaping InstallOrUpdateProgressBlock, completion: @escaping InstallOrUpdateCompletionBlock) -> Void {
progress("Updating \(package.name)...", 0.33)
self.downloadOrUpdatePackage(package: package) { (output, error) in
let needsUpdate = (output != nil) ? !(output!.isEmpty) : false
if !needsUpdate {
completion(error)
return
}
if let error = error {
completion(error)
return
}
progress("Installing \(package.name)...", 0.66)
self.installPackage(package: package, completion: completion)
}
}
func removePackage(package: Package, completion: InstallOrUpdateCompletionBlock) -> Void {
do {
if let path = self.pathForInstalledPackage(package: package) {
try FileManager.default.removeItem(atPath: path)
completion(nil)
} else {
// TODO: error
completion(nil)
}
} catch {
completion(error)
}
}
func isPackageInstalled(package: Package) -> Bool {
if let path = self.pathForInstalledPackage(package: package) {
return FileManager.default.fileExists(atPath: path)
} else {
return false
}
}
func pathForDownloadPackageDirectory() -> String {
var path = NSHomeDirectory()
path.appendPathComponent("Library/Application Support/XcodeHelper")
path.appendPathComponent(self.downloadRelativePath())
return path
}
func pathForDownloadedPackage(package: Package) -> String {
var path = self.pathForDownloadPackageDirectory()
if let name = package.name {
path.appendPathComponent(name)
} else {
// TODO:
path.appendPathComponent("error")
}
return path
}
// MARK: - Abstract
func downloadRelativePath() -> String {
preconditionFailure()
}
func pathForInstalledPackage(package: Package) -> String? {
// Subclass Should Override
return nil
}
func installPackage(package: Package, completion: @escaping InstallOrUpdateCompletionBlock) -> Void {
preconditionFailure()
}
func updatePackage(package: Package, completion: @escaping DownloadOrUpdateCompletionBlock) -> Void {
preconditionFailure()
}
func downloadPackage(package: Package, completion: @escaping DownloadOrUpdateCompletionBlock) -> Void {
preconditionFailure()
}
// MARK: - Hook
func reloadXcodeForPackage(package: Package, completion: InstallOrUpdateCompletionBlock) -> Void {
completion(nil)
}
// MARK: - Private
private func downloadOrUpdatePackage(package: Package, completion: @escaping DownloadOrUpdateCompletionBlock) -> Void {
if FileManager.default.fileExists(atPath: self.pathForDownloadedPackage(package: package)) {
self.updatePackage(package: package, completion: completion)
} else {
self.downloadPackage(package: package, completion: completion)
}
}
}