working directory support

Sources/Core/WorkingDirectory.swift

@@ -0,0 +1,12 @@
+/// This function will attempt to get the current
+/// working directory of the application
+public func workingDirectory() -> String {
+    let file = #file
+    let directory: String?
+    if file.contains(".build") {
+        directory = file.components(separatedBy: "/.build").first
+    } else {
+        directory = file.components(separatedBy: "/Sources").first
+    }
+    return directory?.finished(with: "/") ?? "./"
+}

Tests/CoreTests/UtilityTests.swift

@@ -7,6 +7,7 @@ class UtilityTests: XCTestCase {
         ("testLowercase", testLowercase),
         ("testUppercase", testUppercase),
         ("testIntHex", testIntHex),
+        ("testWorkDir", testWorkDir)
     ]
 
     func testLowercase() {
@@ -36,4 +37,12 @@ class UtilityTests: XCTestCase {
         let unsignedHex = Byte(125).hex
         XCTAssertEqual(unsignedHex, "7D")
     }
+
+    func testWorkDir() {
+        let file = #file
+
+        let workDir = workingDirectory()
+        XCTAssert(file.hasPrefix(workDir))
+        XCTAssertNotEqual(workDir, file)
+    }
 }