Copy database file from bundle to documents in Swift 3

.swift

    func copyDatabaseIfNeeded() {
        // Move database file from bundle to documents folder
        
        let fileManager = FileManager.default
        
        let documentsUrl = fileManager.urls(for: .documentDirectory,
                                                    in: .userDomainMask)
        
        guard documentsUrl.count != 0 else {
            return // Could not find documents URL
        }
        
        let finalDatabaseURL = documentsUrl.first!.appendingPathComponent("SQL.sqlite")
    
        if !( (try? finalDatabaseURL.checkResourceIsReachable()) ?? false) {
            print("DB does not exist in documents folder")
            
            let documentsURL = Bundle.main.resourceURL?.appendingPathComponent("SQL.sqlite")
            
            do {
                  try fileManager.copyItem(atPath: (documentsURL?.path)!, toPath: finalDatabaseURL.path)
                  } catch let error as NSError {
                    print("Couldn't copy file to final location! Error:\(error.description)")
            }

        } else {
            print("Database file found at path: \(finalDatabaseURL.path)")
        }
    
    }

Great function - thank you! Good to go on working on the database by using Sqlite.Swift.
By the way: this code still works fine with Swift 4 - no necessity to "update" the code in any way.

Thanks for sharing it!

thank for resolve