Use separate socket for debug builds (#766)

Sources/Packages/Package.swift

@@ -22,6 +22,9 @@ let package = Package(
         .library(
             name: "SecretAgentKit",
             targets: ["SecretAgentKit", "XPCWrappers"]),
+        .library(
+            name: "Common",
+            targets: ["Common"]),
         .library(
             name: "Brief",
             targets: ["Brief"]),
@@ -65,6 +68,12 @@ let package = Package(
             name: "SecretAgentKitTests",
             dependencies: ["SecretAgentKit"],
         ),
+        .target(
+            name: "Common",
+            dependencies: [],
+            resources: [localization],
+            swiftSettings: swiftSettings,
+        ),
         .target(
             name: "Brief",
             dependencies: ["XPCWrappers"],

Sources/Packages/Sources/Common/BundleIDs.swift

@@ -0,0 +1,11 @@
+import Foundation
+
+extension Bundle {
+    public static var agentBundleID: String {
+        Bundle.main.bundleIdentifier!.replacingOccurrences(of: "Host", with: "SecretAgent")
+    }
+
+    public static var hostBundleID: String {
+        Bundle.main.bundleIdentifier!.replacingOccurrences(of: "SecretAgent", with: "Host")
+    }
+}

Sources/Packages/Sources/Common/URLs.swift

@@ -0,0 +1,29 @@
+import Foundation
+
+extension URL {
+
+    public static var agentHomeURL: URL {
+        URL(fileURLWithPath: URL.homeDirectory.path().replacingOccurrences(of: Bundle.hostBundleID, with: Bundle.agentBundleID))
+    }
+
+    public static var socketPath: String {
+        #if DEBUG
+        URL.agentHomeURL.appendingPathComponent("socket-debug.ssh").path()
+        #else
+        URL.agentHomeURL.appendingPathComponent("socket.ssh").path()
+        #endif
+    }
+
+}
+
+extension String {
+
+    public var normalizedPathAndFolder: (String, String) {
+        // All foundation-based normalization methods replace this with the container directly.
+        let processedPath = replacingOccurrences(of: "~", with: "/Users/\(NSUserName())")
+        let url = URL(filePath: processedPath)
+        let folder = url.deletingLastPathComponent().path()
+        return (processedPath, folder)
+    }
+
+}