Add Dotfiles Xcode project, with ShellLog target for logging shell stuff to os_log facilities

Dotfiles/ShellLog/main.swift

@@ -0,0 +1,57 @@
+//
+//  main.swift
+//  ShellLog
+//
+//  Created by Eryn Wells on 1/18/22.
+//
+
+import ArgumentParser
+import OSLog
+
+enum Level {
+    case Debug
+    case Info
+    case Warn
+    case Error
+}
+
+extension Level: ExpressibleByArgument {
+    init?(argument: String) {
+        switch (argument) {
+        case "debug":
+            self = .Debug
+        case "info":
+            self = .Info
+        case "warn":
+            self = .Warn
+        case "error":
+            self = .Error
+        default:
+            return nil
+        }
+    }
+}
+
+struct ShellLog: ParsableCommand {
+
+    @Option(name: .shortAndLong, help: "The log level")
+    var level: Level?
+
+    @Argument() var message: String
+
+    func run() throws {
+        let log = Logger(subsystem: "me.erynwells.shell", category: "Shell")
+        switch level {
+        case .some(.Debug):
+            log.debug("\(message, privacy: .public)")
+        case .none, .some(.Info):
+            log.info("\(message, privacy: .public)")
+        case .some(.Warn):
+            log.warning("\(message, privacy: .public)")
+        case .some(.Error):
+            log.error("\(message, privacy: .public)")
+        }
+    }
+}
+
+ShellLog.main()