forked from Carthage/Carthage
-
Notifications
You must be signed in to change notification settings - Fork 0
/
FileSink.swift
110 lines (90 loc) · 3.13 KB
/
FileSink.swift
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
//
// FileSink.swift
// Carthage
//
// Created by Justin Spahr-Summers on 2015-03-06.
// Copyright (c) 2015 Carthage. All rights reserved.
//
import Foundation
import ReactiveCocoa
/// A sink which streams its events to a file handle.
public final class FileSink: SinkType {
private var filePointer: UnsafeMutablePointer<FILE>?
private let closeWhenDone: Bool
/// Creates a sink that will take over the given FILE * pointer.
private init(filePointer: UnsafeMutablePointer<FILE>, closeWhenDone: Bool) {
setlinebuf(filePointer)
self.filePointer = filePointer
self.closeWhenDone = closeWhenDone
}
/// Creates a sink that will take over the given file descriptor.
private class func sinkWithDescriptor(fileDescriptor: Int32, closeWhenDone: Bool) -> ColdSignal<FileSink> {
return ColdSignal.lazy {
let pointer = fdopen(fileDescriptor, "a")
if pointer == nil {
return .error(NSError(domain: NSPOSIXErrorDomain, code: Int(errno), userInfo: nil))
} else {
return .single(self(filePointer: pointer, closeWhenDone: closeWhenDone))
}
}
}
/// Creates a sink that will open and write to a temporary file.
///
/// Sends the created sink and the URL to the temporary file.
public class func openTemporaryFile() -> ColdSignal<(FileSink, NSURL)> {
return ColdSignal.lazy {
var temporaryDirectoryTemplate: ContiguousArray<CChar> = NSTemporaryDirectory().stringByAppendingPathComponent("carthage-xcodebuild.XXXXXX.log").nulTerminatedUTF8.map { CChar($0) }
let logFD = temporaryDirectoryTemplate.withUnsafeMutableBufferPointer { (inout template: UnsafeMutableBufferPointer<CChar>) -> Int32 in
return mkstemps(template.baseAddress, 4)
}
if logFD < 0 {
return .error(NSError(domain: NSPOSIXErrorDomain, code: Int(errno), userInfo: nil))
}
let temporaryPath = temporaryDirectoryTemplate.withUnsafeBufferPointer { (ptr: UnsafeBufferPointer<CChar>) -> String in
return String.fromCString(ptr.baseAddress)!
}
return self.sinkWithDescriptor(logFD, closeWhenDone: true)
.map { ($0, NSURL.fileURLWithPath(temporaryPath, isDirectory: false)!) }
}
}
/// Creates a sink that will write to `stdout`.
public class func standardOutputSink() -> FileSink {
return self(filePointer: stdout, closeWhenDone: false)
}
/// Creates a sink that will write to `stderr`.
public class func standardErrorSink() -> FileSink {
return self(filePointer: stderr, closeWhenDone: false)
}
/// Flushes the file, and closes it if appropriate.
private func done() {
if let filePointer = filePointer {
fflush(filePointer)
if closeWhenDone {
fclose(filePointer)
}
}
filePointer = nil
}
/// Writes the event data to the file, or the error if one occurred.
///
/// Upon a terminating event, the file will be flushed, and closed if
/// appropriate.
public func put(event: Event<NSData>) {
if let filePointer = filePointer {
switch event {
case let .Next(data):
fwrite(data.unbox.bytes, UInt(data.unbox.length), 1, filePointer)
case let .Error(error):
fputs(error.description + "\n", filePointer)
default:
break
}
if event.isTerminating {
done()
}
}
}
deinit {
done()
}
}