Make sure utils.GetCwd() does not return a symlink

Always resolve the symlinks before returning the current working
directory name. Functions like filepath.Walk do not handle symlinks
well.

Found out the hard way by @kroepke - Thanks!

Author: bernd

utils/utils.go

@@ -17,7 +17,14 @@ func GetCwd() string {
 		logger.Fatal("Unable to get current directory: %v", err)
 	}
 
-	return currentDir
+	// Make sure to resolve any symlinks and get the real directory.
+	// Functions like filepath.Walk do not handle symlinks well...
+	dir, err := filepath.EvalSymlinks(currentDir)
+	if err != nil {
+		logger.Fatal("Unable to eval symlink for %v: %v", currentDir, err)
+	}
+
+	return dir
 }
 
 func Chdir(path string) {
@@ -31,10 +38,7 @@ func GetRelativePath(path string) string {
 		return path
 	}
 
-	cwd, err := os.Getwd()
-	if err != nil {
-		logger.Fatal("Unable to get current working directory")
-	}
+	cwd := GetCwd()
 	relPath, err := filepath.Rel(cwd, path)
 	if err != nil {
 		logger.Fatal("Unable to get relative path for %v", path)