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Getting the Size of a file or directory in Swift
//
// main.swift
// findsize
//
// Created by Ray Fix on 2/6/16.
// Copyright © 2016 Neko Labs. All rights reserved.
//
import Foundation
enum FileErrors : ErrorType {
case BadEnumeration
case BadResource
}
func findSize(path: String) throws -> UInt64 {
let fullPath = (path as NSString).stringByExpandingTildeInPath
let fileAttributes: NSDictionary = try NSFileManager.defaultManager().attributesOfItemAtPath(fullPath)
if fileAttributes.fileType() == NSFileTypeRegular {
return fileAttributes.fileSize()
}
let url = NSURL(fileURLWithPath: fullPath)
guard let directoryEnumerator = NSFileManager.defaultManager().enumeratorAtURL(url, includingPropertiesForKeys: [NSURLFileSizeKey], options: [.SkipsHiddenFiles], errorHandler: nil) else { throw FileErrors.BadEnumeration }
var total: UInt64 = 0
for (index, object) in directoryEnumerator.enumerate() {
guard let fileURL = object as? NSURL else { throw FileErrors.BadResource }
var fileSizeResource: AnyObject?
try fileURL.getResourceValue(&fileSizeResource, forKey: NSURLFileSizeKey)
guard let fileSize = fileSizeResource as? NSNumber else { continue }
total += fileSize.unsignedLongLongValue
if index % 1000 == 0 {
print(".", terminator: "")
}
}
return total
}
if Process.arguments.count < 2 {
print("usage: findsize filenames")
}
do {
let totalSize = try Process.arguments.dropFirst().reduce(UInt64(0)) { $0 + (try findSize($1)) }
let formatter = NSNumberFormatter()
formatter.numberStyle = .DecimalStyle
formatter.formatterBehavior = .Behavior10_4
let pretty = formatter.stringFromNumber(NSNumber(unsignedLongLong: totalSize))
print("\nTotal Size: \(pretty)")
}
catch let error as NSError {
print(error.localizedDescription)
}
catch {
print(error)
}
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