#511: Add ln_s_order rule

thefuck/rules/ln_no_hard_link.py

@@ -15,7 +15,7 @@ from thefuck.specific.sudo import sudo_support
 @sudo_support
 def match(command):
     return (command.stderr.endswith("hard link not allowed for directory") and
-            command.script.startswith("ln "))
+            command.script_parts[0] == 'ln')
 
 
 @sudo_support

thefuck/rules/ln_s_order.py

@@ -0,0 +1,26 @@
+import os
+from thefuck.specific.sudo import sudo_support
+
+
+def _get_destination(script_parts):
+    """When arguments order is wrong first argument will be destination."""
+    for part in script_parts:
+        if part not in {'ln', '-s', '--symbolic'} and os.path.exists(part):
+            return part
+
+
+@sudo_support
+def match(command):
+    return (command.script_parts[0] == 'ln'
+            and {'-s', '--symbolic'}.intersection(command.script_parts)
+            and 'File exists' in command.stderr
+            and _get_destination(command.script_parts))
+
+
+@sudo_support
+def get_new_command(command):
+    destination = _get_destination(command.script_parts)
+    parts = command.script_parts[:]
+    parts.remove(destination)
+    parts.append(destination)
+    return ' '.join(parts)