Added log rotate function - crude for now, should probably look at ht…

…tps://github.com/apple/swift-log package

Outset/Outset.swift

@@ -26,7 +26,8 @@ let loginOncePrivilegedDir = outsetDirectory+"login-privileged-once"
 let onDemandDir = outsetDirectory+"on-demand"
 let shareDirectory = outsetDirectory+"share/"
 let logDirectory = outsetDirectory+"logs"
-let logFile = logDirectory+"/outset.log"
+let logFileName = "outset.log"
+let logFilePath = logDirectory+"/"+logFileName
 
 let onDemandTrigger = "/private/tmp/.io.macadmins.outset.ondemand.launchd"
 let loginPrivilegedTrigger = "/private/tmp/.io.macadmins.outset.login-privileged.launchd"
@@ -46,6 +47,7 @@ var prefs = loadOutsetPreferences()
 // Log Stuff
 let bundleID = Bundle.main.bundleIdentifier ?? "io.macadmins.Outset"
 let osLog = OSLog(subsystem: bundleID, category: "main")
+let logRotateDays: Int = 30
 
 // Logic insertion point
 @main
@@ -155,6 +157,9 @@ struct Outset: ParsableCommand {
  }
 
  if boot {
+ // perform log file rotation
+ performLogRotation(logFolderPath: logDirectory, logFileBaseName: logFileName)
+
  writeLog("Processing scheduled runs for boot", logLevel: .debug)
  ensureWorkingFolders()
 

Outset/Utils/FileUtils.swift

@@ -192,3 +192,35 @@ func detachDmg(dmgMount: String) -> String {
  }
  return output.trimmingCharacters(in: .whitespacesAndNewlines)
 }
+
+func performLogRotation(logFolderPath: String, logFileBaseName: String, maxLogFiles: Int = 30) {
+ let fileManager = FileManager.default
+ let currentDay = Calendar.current.component(.day, from: Date())
+
+ // Check if the day has changed
+ let newestLogFile = logFolderPath + "/" + logFileBaseName
+ if fileManager.fileExists(atPath: newestLogFile) {
+ let fileCreationDate = try? fileManager.attributesOfItem(atPath: newestLogFile)[.creationDate] as? Date
+ if let creationDate = fileCreationDate {
+ let dayOfCreation = Calendar.current.component(.day, from: creationDate)
+ if dayOfCreation != currentDay {
+ // rotate files
+ for archivedLogFile in (1...maxLogFiles).reversed() {
+ let sourcePath = logFolderPath + "/" + (archivedLogFile == 1 ? logFileBaseName : "\(logFileBaseName).\(archivedLogFile-1)")
+ let destinationPath = logFolderPath + "/" + "\(logFileBaseName).\(archivedLogFile)"
+
+ if fileManager.fileExists(atPath: sourcePath) {
+ if archivedLogFile == maxLogFiles {
+ // Delete the oldest log file if it exists
+ try? fileManager.removeItem(atPath: sourcePath)
+ } else {
+ // Move the log file to the next number in the rotation
+ try? fileManager.moveItem(atPath: sourcePath, toPath: destinationPath)
+ }
+ }
+ }
+ writeLog("Logrotate complete", logLevel: .debug)
+ }
+ }
+ }
+}

Outset/Utils/Logging.swift

@@ -14,7 +14,7 @@ class StandardError: TextOutputStream {
  if #available(macOS 10.15.4, *) {
  try! FileHandle.standardError.write(contentsOf: Data(string.utf8))
  } else {
- // Fallback on earlier versions
+ // Fallback on earlier versions (should work on pre 10.15.4 but untested)
  if let data = string.data(using: .utf8) {
  FileHandle.standardError.write(data)
  }
@@ -65,14 +65,14 @@ func writeFileLog(message: String, logLevel: OSLogType) {
  if logLevel == .debug && !debugMode {
  return
  }
- let logFileURL = URL(fileURLWithPath: logFile)
- if !checkFileExists(path: logFile) {
+ let logFileURL = URL(fileURLWithPath: logFilePath)
+ if !checkFileExists(path: logFilePath) {
  FileManager.default.createFile(atPath: logFileURL.path, contents: nil, attributes: nil)
  let attributes = [FileAttributeKey.posixPermissions: 0o666]
  do {
  try FileManager.default.setAttributes(attributes, ofItemAtPath: logFileURL.path)
  } catch {
- printStdErr("\(oslogTypeToString(.error).uppercased()): Unable to create log file at \(logFile)")
+ printStdErr("\(oslogTypeToString(.error).uppercased()): Unable to create log file at \(logFilePath)")
  printStdErr(error.localizedDescription)
  return
  }
@@ -90,7 +90,7 @@ func writeFileLog(message: String, logLevel: OSLogType) {
  fileHandle.seekToEndOfFile()
  fileHandle.write(logEntry.data(using: .utf8)!)
  } catch {
- printStdErr("\(oslogTypeToString(.error).uppercased()): Unable to read log file at \(logFile)")
+ printStdErr("\(oslogTypeToString(.error).uppercased()): Unable to read log file at \(logFilePath)")
  printStdErr(error.localizedDescription)
  return
  }