Copy wakatime-cli when symlink fails

WakaTime.py

@@ -908,22 +908,24 @@ def download(url, filePath):
         raise
 
 
-def createSymlink():
-    if is_win:
-        link = os.path.join(RESOURCES_FOLDER, 'wakatime-cli.exe')
-        if os.path.exists(link):
+def is_symlink(path):
     try:
-                os.remove(link)
+        return os.is_symlink(path)
+    except:
+        return False
+
+
+def createSymlink():
+    link = os.path.join(RESOURCES_FOLDER, 'wakatime-cli')
+    if is_win:
+        link = link + '.exe'
+    elif os.path.exists(link) and is_symlink(link):
+        return  # don't re-create symlink on Unix-like platforms
+
+    try:
+        os.symlink(getCliLocation(), link)
     except:
-                log(traceback.format_exc())
         try:
             shutil.copy2(getCliLocation(), link)
         except:
             log(traceback.format_exc())
-    else:
-        link = os.path.join(RESOURCES_FOLDER, 'wakatime-cli')
-        if not os.path.exists(link):
-            try:
-                os.symlink(getCliLocation(), link)
-            except:
-                pass