output_on_minion.txt

$ cd /tmp/testdir/sites-enabled/
$ touch 12098 dlij 0921 dpo 210983uj1m foo bar abc def
$ ls 
0921  12098  210983uj1m  abc  bar  def  dlij  dpo  foo
$ salt-call state.apply remove_files_in_dir_except_list
local:
----------
          ID: file
    Function: 0./tmp/testdir/sites-enabled/
        Name: remove files in dir
      Result: True
     Comment: Files cleaned from directory /tmp/testdir/sites-enabled
     Started: 16:57:14.746713
    Duration: 5.838 ms
     Changes:   
              ----------
              removed:
                  - /tmp/testdir/sites-enabled/bar
                  - /tmp/testdir/sites-enabled/dlij
                  - /tmp/testdir/sites-enabled/210983uj1m
                  - /tmp/testdir/sites-enabled/12098
                  - /tmp/testdir/sites-enabled/foo
                  - /tmp/testdir/sites-enabled/dpo
                  - /tmp/testdir/sites-enabled/0921

Summary for local
------------
Succeeded: 1 (changed=1)
Failed:    0
------------
Total states run:     1
Total run time:   5.838 ms
$ ls
abc  def

pillar.sls

settings:
  nginx:
    sites:
      - abc
      - def

remove_files_in_dir_except_list.sls

{% set wanted_sites = salt['pillar'].get('settings:nginx:sites') %}

remove files in dir:
  file.directory:
    - name: /tmp/testdir/sites-enabled/
    - clean: True
{% if wanted_sites is not none %}
    - exclude_pat: E@({{ wanted_sites|join(')|(') }})
{% endif %}