added force parameter to symlink invocation, in order to force the creation in…

added force parameter to symlink invocation, in order to force the creation in case of already existing destination with the type of 'file'

library/files/file

@@ -150,6 +150,7 @@ def main():
             state = dict(choices=['file','directory','link','hard','absent'], default='file'),
             path  = dict(aliases=['dest', 'name'], required=True),
             recurse  = dict(default='no', type='bool'),
+            force = dict(required=False,default=False,type='bool'),
             diff_peek = dict(default=None),
             validate = dict(required=False, default=None),
         ),
@@ -159,6 +160,7 @@ def main():
 
     params = module.params
     state  = params['state']
+    force = params['force']
     params['path'] = path = os.path.expanduser(params['path'])
 
     # short-circuit for diff_peek
@@ -226,7 +228,10 @@ def main():
         module.exit_json(path=path, changed=True)
 
     if prev_state != 'absent' and prev_state != state:
-        module.fail_json(path=path, msg='refusing to convert between %s and %s for %s' % (prev_state, state, src))
+        if force and prev_state == 'file' and state == 'link':
+            pass
+        else:
+            module.fail_json(path=path, msg='refusing to convert between %s and %s for %s' % (prev_state, state, src))
 
     if prev_state == 'absent' and state == 'absent':
         module.exit_json(path=path, changed=False)
@@ -287,7 +292,14 @@ def main():
                 dolink(src, path, state, module)
                 changed = True
         elif prev_state == 'file':
-            module.fail_json(dest=path, src=src, msg='Cannot link, file exists at destination')
+            if not force:
+                module.fail_json(dest=path, src=src, msg='Cannot link, file exists at destination')
+            else:
+                if module.check_mode:
+                    module.exit_json(changed=True)
+                os.unlink(path)
+                dolink(src, path, state, module)
+                changed = True
         else:
             module.fail_json(dest=path, src=src, msg='unexpected position reached')