fix: fix osx root path issues

fixes so all paths dont get rewritten to `../../../../../../../users/...` on osx 

fixes LeDDGroup#167

Author: bradennapier

src/utils/resolve-module-name.ts

@@ -1,6 +1,7 @@
 import { VisitorContext } from "../types";
 import { isBaseDir, isURL, maybeAddRelativeLocalPrefix } from "./general-utils";
 import * as path from "path";
+import { realpathSync } from "fs";
 import { removeFileExtension, removeSuffix, ResolvedModuleFull, SourceFile } from "typescript";
 import { getOutputDirForSourceFile } from "./ts-helpers";
 
@@ -116,6 +117,18 @@ function getResolvedSourceFile(context: VisitorContext, fileName: string): Sourc
 // region: Utils
 /* ****************************************************************************************************************** */
 
+function tryRealpathNative(value) {
+    try {
+       return realpathSync.native(value)
+    } catch {
+        return value
+    }
+}
+
+function nativeRelativePath(from, to) {
+    return path.relative(tryRealpathNative(from), tryRealpathNative(to))
+}
+
 /**
  * Resolve a module name
  */
@@ -167,12 +180,12 @@ export function resolveModuleName(context: VisitorContext, moduleName: string):
 
     /* Remove base dirs to make relative to root */
     if (fileRootDir && moduleRootDir) {
-      srcFileOutputDir = path.relative(fileRootDir, srcFileOutputDir);
-      moduleFileOutputDir = path.relative(moduleRootDir, moduleFileOutputDir);
+      srcFileOutputDir = nativeRelativePath(fileRootDir, srcFileOutputDir);
+      moduleFileOutputDir = nativeRelativePath(moduleRootDir, moduleFileOutputDir);
     }
   }
 
-  const outputDir = path.relative(srcFileOutputDir, moduleFileOutputDir);
+  const outputDir = nativeRelativePath(srcFileOutputDir, moduleFileOutputDir);
 
   /* Compose final output path */
   const outputPath = maybeAddRelativeLocalPrefix(tsInstance.normalizePath(path.join(outputDir, outputBaseName)));