gistfile1.txt

{% if salt.grains.get('id') in salt.pillar.get('nginx:apps',{}) %}
{% set app = salt.grains.get('id') %}
{% else %}
{% set app = 'default' %}
{% endif %}
/etc/nginx/sites-available/{{ app }}:
  file.managed:
    - source: salt://nginx/files/etc/nginx/sites-available/{{ app }}.jinja
    - template: jinja
    - user: root
    - group: root
    - mode: 640

/etc/nginx/sites-enabled/{{ app }}:
 file.symlink:
    - target: /etc/nginx/sites-available/{{ app }}
    - require:
      - file: /etc/nginx/sites-available/{{ app }}

pillar data

nginx:
  apps:
    - gb-api
    - other-app
    - second